source/mir/storage/Database.java

   1 /*
   2  * put your module comment here
   3  */
   4 package mir.storage;
   5
   6 import  java.sql.*;
   7 import  java.lang.*;
   8 import  java.io.*;
   9 import  java.util.*;
  10 import  freemarker.template.*;
  11 import  com.javaexchange.dbConnectionBroker.*;
  12 import  mir.storage.StorageObject;
  13 import  mir.entity.*;
  14 import  mir.misc.*;
  15
  16
  17 /**
  18  * Diese Klasse implementiert die Zugriffsschicht auf die Datenbank.
  19  * Alle Projektspezifischen Datenbankklassen erben von dieser Klasse.
  20  * In den Unterklassen wird im Minimalfall nur die Tabelle angegeben.
  21  * Im Konfigurationsfile findet sich eine Verweis auf den verwendeten
  22  * Treiber, Host, User und Passwort, ueber den der Zugriff auf die
  23  * Datenbank erfolgt.
  24  *
  25  * @author RK
  26  * @version 16.7.1999
  27  */
  28 public class Database implements StorageObject {
  29
  30         protected DbConnectionBroker        myBroker;
  31         protected String                    theTable;
  32         protected String                    theCoreTable=null;
  33         protected String                    thePKeyName="id";
  34         protected int                       thePKeyType;
  35         protected boolean                   evaluatedMetaData=false;
  36         protected ArrayList                 metadataFields,metadataLabels,metadataNotNullFields;
  37         protected int[]                     metadataTypes;
  38         protected Class                     theEntityClass;
  39         protected StorageObject             myselfDatabase;
  40         protected HashMap                   cache;
  41         protected SimpleList                popupCache=null;
  42         protected boolean                                               hasPopupCache = false;
  43         protected SimpleHash                hashCache=null;
  44         protected boolean                   hasTimestamp=true;
  45         private       String                database_driver;
  46         private       String                database_url;
  47         private int                         defaultLimit;
  48         private DatabaseAdaptor             theAdaptor;
  49         protected Logfile                   theLog;
  50         protected Connection                con;
  51
  52         /**
  53          * Kontruktor bekommt den Filenamen des Konfigurationsfiles übergeben.
  54          * Aus diesem file werden <code>Database.Logfile</code>,
  55          * <code>Database.Username</code>,<code>Database.Password</code>,
  56          * <code>Database.Host</code> und <code>Database.Adaptor</code>
  57          * ausgelesen und ein Broker für die Verbindugen zur Datenbank
  58          * erzeugt.
  59          *
  60          * @param   String confFilename Dateiname der Konfigurationsdatei
  61          */
  62         public Database() {
  63         theLog = Logfile.getInstance(Configuration.getProperty("Home") + Configuration.getProperty("Database.Logfile"));
  64     theLog.printDebugInfo("-- inside database");
  65                 String database_username=Configuration.getProperty("Database.Username");
  66                 String database_password=Configuration.getProperty("Database.Password");
  67                 String database_host=Configuration.getProperty("Database.Host");
  68                 String theAdaptorName=Configuration.getProperty("Database.Adaptor");
  69                 try {
  70                         theEntityClass = Class.forName("mir.entity.GenericEntity");
  71                         theAdaptor = (DatabaseAdaptor)Class.forName(theAdaptorName).newInstance();
  72                         defaultLimit = Integer.parseInt(Configuration.getProperty("Database.Limit"));
  73                         database_driver=theAdaptor.getDriver();
  74                         database_url=theAdaptor.getURL(database_username,database_password,database_host);
  75                         theLog.printDebugInfo("adding Broker with: " +database_driver+":"+database_url  );
  76                         Configuration.addBroker(database_driver,database_url);
  77                         myBroker=Configuration.getBroker();
  78                 }
  79                 catch (Exception e){
  80                         theLog.printError("Bei Konstruktion von Database() with " + theAdaptorName + " -- " +e.toString());
  81                 }
  82         }
  83
  84         /**
  85          * Liefert die Entity-Klasse zurück, in der eine Datenbankzeile gewrappt
  86          * wird. Wird die Entity-Klasse durch die erbende Klasse nicht überschrieben,
  87          * wird eine mir.entity.GenericEntity erzeugt.
  88          *
  89          * @return Class-Objekt der Entity
  90          */
  91         public java.lang.Class getEntityClass () {
  92                 return  theEntityClass;
  93         }
  94
  95         /**
  96          * Liefert die Standardbeschränkung von select-Statements zurück, also
  97          * wieviel Datensätze per Default selektiert werden.
  98          *
  99          * @return Standard-Anzahl der Datensätze
 100          */
 101         public int getLimit () {
 102                 return  defaultLimit;
 103         }
 104
 105         /**
 106          * Liefert den Namen des Primary-Keys zurück. Wird die Variable nicht von
 107          * der erbenden Klasse überschrieben, so ist der Wert <code>PKEY</code>
 108          * @return Name des Primary-Keys
 109          */
 110         public String getIdName () {
 111                 return  thePKeyName;
 112         }
 113
 114         /**
 115          * Liefert den Namen der Tabelle, auf das sich das Datenbankobjekt bezieht.
 116          *
 117          * @return Name der Tabelle
 118          */
 119         public String getTableName () {
 120                 return  theTable;
 121         }
 122
 123         /*
 124          *   Dient dazu vererbte Tabellen bei objectrelationalen DBMS
 125          *   zu speichern, wenn die id einer Tabelle in der parenttabelle verwaltet wird.
 126          *   @return liefert theCoreTabel als String zurueck, wenn gesetzt, sonst
 127          *    the Table
 128          */
 129
 130         public String getCoreTable(){
 131                 if (theCoreTable!=null) return theCoreTable;
 132                 else return theTable;
 133         }
 134
 135         /**
 136          * Liefert Feldtypen der Felder der Tabelle zurueck (s.a. java.sql.Types)
 137          * @return int-Array mit den Typen der Felder
 138          * @exception StorageObjectException
 139          */
 140         public int[] getTypes () throws StorageObjectException {
 141                 if (metadataTypes == null)
 142                         get_meta_data();
 143                 return  metadataTypes;
 144         }
 145
 146         /**
 147          * Liefert eine Liste der Labels der Tabellenfelder
 148          * @return ArrayListe mit Labeln
 149          * @exception StorageObjectException
 150          */
 151         public ArrayList getLabels () throws StorageObjectException {
 152                 if (metadataLabels == null)
 153                         get_meta_data();
 154                 return  metadataLabels;
 155         }
 156
 157         /**
 158          * Liefert eine Liste der Felder der Tabelle
 159          * @return ArrayList mit Feldern
 160          * @exception StorageObjectException
 161          */
 162         public ArrayList getFields () throws StorageObjectException {
 163                 if (metadataFields == null)
 164                         get_meta_data();
 165                 return  metadataFields;
 166         }
 167
 168
 169         /*
 170          *   Uebersetzt die Datenbankwerte in einen String.
 171          *   @param inValue  Wert aus ResultSet.
 172          *   @param aType  Datenbanktyp.
 173          *   @return liefert den Wert als String zurueck. Wenn keine Umwandlung moeglich
 174          *           dann /unsupported value/
 175          */
 176         private String getValueAsString (ResultSet rs, int valueIndex, int aType) throws StorageObjectException {
 177                 String outValue = null;
 178                 if (rs != null) {
 179                         try {
 180                                 switch (aType) {
 181                                         case java.sql.Types.BIT:
 182                                                 outValue = (rs.getBoolean(valueIndex) == true) ? "1" : "0";
 183                                                 break;
 184                                         case java.sql.Types.INTEGER:case java.sql.Types.SMALLINT:case java.sql.Types.TINYINT:case java.sql.Types.BIGINT:
 185                                                 int out = rs.getInt(valueIndex);
 186                                                 if (!rs.wasNull())
 187                                                         outValue = new Integer(out).toString();
 188                                                 break;
 189                                         case java.sql.Types.NUMERIC:
 190                                                 long outl = rs.getLong(valueIndex);
 191                                                 if (!rs.wasNull())
 192                                                         outValue = new Long(outl).toString();
 193                                                 break;
 194                                         case java.sql.Types.REAL:
 195                                                 float tempf = rs.getFloat(valueIndex);
 196                                                 if (!rs.wasNull()) {
 197                                                         tempf *= 10;
 198                                                         tempf += 0.5;
 199                                                         int tempf_int = (int)tempf;
 200                                                         tempf = (float)tempf_int;
 201                                                         tempf /= 10;
 202                                                         outValue = "" + tempf;
 203                                                         outValue = outValue.replace('.', ',');
 204                                                 }
 205                                                 break;
 206                                         case java.sql.Types.DOUBLE:
 207                                                 double tempd = rs.getDouble(valueIndex);
 208                                                 if (!rs.wasNull()) {
 209                                                         tempd *= 10;
 210                                                         tempd += 0.5;
 211                                                         int tempd_int = (int)tempd;
 212                                                         tempd = (double)tempd_int;
 213                                                         tempd /= 10;
 214                                                         outValue = "" + tempd;
 215                                                         outValue = outValue.replace('.', ',');
 216                                                 }
 217                                                 break;
 218                                         case java.sql.Types.CHAR:case java.sql.Types.VARCHAR:case java.sql.Types.LONGVARCHAR:
 219                                                 outValue = rs.getString(valueIndex);
 220                                                 if (outValue != null)
 221                                                         outValue = StringUtil.encodeHtml(StringUtil.unquote(outValue));
 222                                                 break;
 223                                         case java.sql.Types.LONGVARBINARY:
 224                                                 outValue = rs.getString(valueIndex);
 225                                                 if (outValue != null)
 226                                                         outValue = StringUtil.encodeHtml(StringUtil.unquote(outValue));
 227                                                 break;
 228                                         case java.sql.Types.TIMESTAMP:
 229                                                 Timestamp timestamp = (rs.getTimestamp(valueIndex));
 230                                                 if (!rs.wasNull()) {
 231                                                         outValue = timestamp.toString();
 232                                                 }
 233                                                 break;
 234                                         default:
 235                                                 outValue = "<unsupported value>";
 236                                                 theLog.printWarning("Unsupported Datatype: at " + valueIndex +
 237                                                                 " (" + aType + ")");
 238                                 }
 239                         } catch (SQLException e) {
 240                                 throw  new StorageObjectException("Could not get Value out of Resultset -- "
 241                                                 + e.toString());
 242                         }
 243                 }
 244                 return  outValue;
 245         }
 246
 247         /*
 248          *   select-Operator um einen Datensatz zu bekommen.
 249          *   @param id Primaerschluessel des Datensatzes.
 250          *   @return liefert EntityObject des gefundenen Datensatzes oder null.
 251          */
 252         public Entity selectById(String id)
 253     throws StorageObjectException {
 254
 255                 if (id==null||id.equals(""))
 256       throw new StorageObjectException("id war null");
 257                 if (cache != null && cache.containsKey(id))
 258                         return (Entity)cache.get(id);  // wenn cache gesetzt, evtl. kein roundtrip zur Datenbank
 259
 260                 Statement stmt=null;Connection con=getPooledCon();
 261                 Entity returnEntity=null;
 262                 try {
 263                         ResultSet rs;
 264                         String selectSql = "select * from " + theTable + " where " + thePKeyName + "=" + id;
 265                         stmt = con.createStatement();
 266                         rs = executeSql(stmt, selectSql);
 267                         if (rs != null) {
 268                                 if (evaluatedMetaData==false) evalMetaData(rs.getMetaData());
 269                                 if (rs.next())
 270                                         returnEntity = makeEntityFromResultSet(rs);
 271                                 else theLog.printDebugInfo("Keine daten fuer id: " + id + "in Tabelle" + theTable);
 272                                 rs.close();
 273                         }       else {
 274         theLog.printDebugInfo("No Data for Id " + id + " in Table " + theTable);
 275       }
 276                 } catch (SQLException sqe){
 277       throwSQLException(sqe,"selectById"); return null;
 278     } catch (NumberFormatException e) {
 279       theLog.printError("ID ist keine Zahl: " + id);
 280     } finally {
 281       freeConnection(con,stmt);
 282     }
 283
 284                 return returnEntity;
 285         }
 286
 287         /**
 288          *   select-Operator um Datensaetze zu bekommen, die key = value erfuellen.
 289          *   @param key  Datenbankfeld der Bedingung.
 290          *   @param value  Wert die der key anehmen muss.
 291          *   @return EntityList mit den gematchten Entities
 292          */
 293
 294         public EntityList selectByFieldValue(String aField, String aValue)
 295                 throws StorageObjectException {
 296
 297                 return selectByFieldValue(aField, aValue, 0);
 298         }
 299
 300         /**
 301          *   select-Operator um Datensaetze zu bekommen, die key = value erfuellen.
 302          *   @param key  Datenbankfeld der Bedingung.
 303          *   @param value  Wert die der key anehmen muss.
 304          *   @param offset  Gibt an ab welchem Datensatz angezeigt werden soll.
 305          *   @return EntityList mit den gematchten Entities
 306          */
 307
 308         public EntityList selectByFieldValue(String aField, String aValue, int offset)
 309                 throws StorageObjectException   {
 310
 311                 return selectByWhereClause(aField + "=" + aValue, offset);
 312         }
 313
 314
 315         /**
 316          * select-Operator liefert eine EntityListe mit den gematchten Datensätzen zurück.
 317          * Also offset wird der erste Datensatz genommen.
 318          *
 319          * @param wc where-Clause
 320          * @return EntityList mit den gematchten Entities
 321          * @exception StorageObjectException
 322          */
 323         public EntityList selectByWhereClause(String where)
 324                 throws StorageObjectException   {
 325
 326                 return selectByWhereClause(where, 0);
 327         }
 328
 329
 330         /**
 331          * select-Operator liefert eine EntityListe mit den gematchten Datensätzen zurück.
 332          * Als maximale Anzahl wird das Limit auf der Konfiguration genommen.
 333          *
 334          * @param wc where-Clause
 335          * @param offset ab welchem Datensatz.
 336          * @return EntityList mit den gematchten Entities
 337          * @exception StorageObjectException
 338          */
 339         public EntityList selectByWhereClause(String whereClause, int offset)
 340                 throws StorageObjectException   {
 341
 342                 return selectByWhereClause(whereClause, null, offset);
 343         }
 344
 345         /**
 346          * select-Operator liefert eine EntityListe mit den gematchten Datensätzen zurück.
 347          * Also offset wird der erste Datensatz genommen.
 348          * Als maximale Anzahl wird das Limit auf der Konfiguration genommen.
 349          *
 350          * @param wc where-Clause
 351          * @param ob orderBy-Clause
 352          * @return EntityList mit den gematchten Entities
 353          * @exception StorageObjectException
 354          */
 355
 356         public EntityList selectByWhereClause(String where, String order)
 357                 throws StorageObjectException   {
 358
 359                 return selectByWhereClause(where, order, 0);
 360         }
 361         /**
 362          * select-Operator liefert eine EntityListe mit den gematchten Datensätzen zurück.
 363          * Als maximale Anzahl wird das Limit auf der Konfiguration genommen.
 364          *
 365          * @param wc where-Clause
 366          * @param ob orderBy-Clause
 367          * @param offset ab welchem Datensatz
 368          * @return EntityList mit den gematchten Entities
 369          * @exception StorageObjectException
 370          */
 371
 372         public EntityList selectByWhereClause(String whereClause, String orderBy, int offset)
 373                 throws StorageObjectException   {
 374
 375                 return selectByWhereClause(whereClause, orderBy, offset, defaultLimit);
 376         }
 377
 378
 379         /**
 380          * select-Operator liefert eine EntityListe mit den gematchten Datensätzen zurück.
 381          * @param wc where-Clause
 382          * @param ob orderBy-Clause
 383          * @param offset ab welchem Datensatz
 384          * @param limit wieviele Datensätze
 385          * @return EntityList mit den gematchten Entities
 386          * @exception StorageObjectException
 387          */
 388
 389         public EntityList selectByWhereClause(String wc, String ob, int offset, int limit)
 390                 throws StorageObjectException   {
 391
 392                 // local
 393                 EntityList    theReturnList=null;
 394                 Connection    con=null;
 395                 Statement     stmt=null;
 396                 ResultSet     rs;
 397                 int               offsetCount = 0;
 398                 int           count=0;
 399
 400
 401                 // build sql-statement
 402                 if (wc != null && wc.length() == 0) {
 403                         wc = null;
 404                 }
 405                 StringBuffer countSql = new StringBuffer("select count(*) from ").append(theTable);
 406                 StringBuffer selectSql = new StringBuffer("select * from ").append(theTable);
 407                 if (wc != null) {
 408                         selectSql.append(" where ").append(wc);
 409                         countSql.append(" where ").append(wc);
 410                 }
 411                 if (ob != null && !(ob.length() == 0)) {
 412                         selectSql.append(" order by ").append(ob);
 413                 }
 414                 if (theAdaptor.hasLimit()) {
 415                         if (limit > -1 && offset > -1) {
 416                                 selectSql.append(" limit ");
 417                                 if (theAdaptor.reverseLimit()) {
 418                                         selectSql.append(limit).append(",").append(offset);
 419                                 }
 420                                 else {
 421                                         selectSql.append(offset).append(",").append(limit);
 422                                 }
 423                         }
 424                 }
 425
 426                         // execute sql
 427                 try {
 428                         con = getPooledCon();
 429                         stmt = con.createStatement();
 430                         // counting rows
 431                         if (theAdaptor.hasLimit()) {
 432                                 rs = executeSql(stmt, countSql.toString());
 433                                 if (rs != null) {
 434                                         if (rs.next())
 435                                                 count = rs.getInt(1);
 436                                         rs.close();
 437                                 }
 438                                 else
 439                                         theLog.printError("Mh. Konnte nicht zaehlen: " + countSql);
 440                         }
 441                         // hier select
 442                         rs = executeSql(stmt, selectSql.toString());
 443                         if (rs != null) {
 444                                 theReturnList = new EntityList();
 445                                 if (evaluatedMetaData == false) {
 446                                         evalMetaData(rs.getMetaData());
 447                                 }
 448                                 Entity theResultEntity;
 449                                 while (rs.next()) {
 450                                         theResultEntity = makeEntityFromResultSet(rs);
 451                                         theReturnList.add(theResultEntity);
 452                                         offsetCount++;
 453                                 }
 454                                 rs.close();
 455                         }
 456                         // making entitylist
 457                         if (!(theAdaptor.hasLimit()))
 458                                 count = offsetCount;
 459                         if (theReturnList != null) {
 460                                 theReturnList.setCount(count);
 461                                 theReturnList.setOffset(offset);
 462                                 theReturnList.setWhere(wc);
 463                                 theReturnList.setOrder(ob);
 464                                 if (offset >= limit) {
 465                                         theReturnList.setPrevBatch(offset - limit);
 466                                 }
 467                                 if (offset + offsetCount < count) {
 468                                         theReturnList.setNextBatch(offset + limit);
 469                                 }
 470                         }
 471                 } catch (SQLException sqe) {
 472                         throwSQLException(sqe, "selectByWhereClause");
 473                 } finally {
 474                         freeConnection(con, stmt);
 475                 }
 476                 return  theReturnList;
 477         }
 478
 479         /**
 480          *  Bastelt aus einer Zeile der Datenbank ein EntityObjekt.
 481          *
 482          *  @param rs Das ResultSetObjekt.
 483          *  @return Entity Die Entity.
 484          */
 485
 486         public Entity makeEntityFromResultSet (ResultSet rs) throws StorageObjectException {
 487                 HashMap theResultHash = new HashMap();
 488                 String theResult = null;
 489                 int theType;
 490                 Entity returnEntity = null;
 491                 try {
 492                         int size = metadataFields.size();
 493                         for (int i = 0; i < size; i++) {
 494                                 // alle durchlaufen bis nix mehr da
 495                                 theType = metadataTypes[i];
 496                                 if (theType == java.sql.Types.LONGVARBINARY) {
 497                                         InputStream us = rs.getAsciiStream(i + 1);
 498                                         if (us != null) {
 499                                                 InputStreamReader is = new InputStreamReader(us);
 500                                                 char[] data = new char[32768];
 501                                                 StringBuffer theResultString = new StringBuffer();
 502                                                 int len;
 503                                                 while ((len = is.read(data)) > 0) {
 504                                                         theResultString.append(data, 0, len);
 505                                                 }
 506                                                 is.close();
 507                                                 theResult = theResultString.toString();
 508                                         }
 509                                         else {
 510                                                 theResult = null;
 511                                         }
 512                                 }
 513                                 else {
 514                                         theResult = getValueAsString(rs, (i + 1), theType);
 515                                 }
 516                                 if (theResult != null) {
 517                                         theResultHash.put(metadataFields.get(i), theResult);
 518                                 }
 519                         }
 520                         if (cache != null && theResultHash.containsKey(thePKeyName) && cache.containsKey((String)theResultHash.get(thePKeyName))) {
 521                                 //theLog.printDebugInfo("CACHE: (out) "+ theResultHash.get(thePKeyName)+ " :"+theTable);
 522                                 returnEntity = (Entity)cache.get((String)theResultHash.get(thePKeyName));
 523                         }
 524                         else {
 525                                 if (theEntityClass != null) {
 526                                         returnEntity = (Entity)theEntityClass.newInstance();
 527                                         returnEntity.setValues(theResultHash);
 528                                         returnEntity.setStorage(myselfDatabase);
 529                                         if (cache != null) {
 530                                                 //theLog.printDebugInfo("CACHE: ( in) " + returnEntity.getId() + " :"+theTable);
 531                                                 cache.put(returnEntity.getId(), returnEntity);
 532                                         }
 533                                 }
 534                                 else {
 535                                         throwStorageObjectException("Interner Fehler theEntityClass nicht gesetzt!");
 536                                 }
 537                         }
 538                 }           // try
 539                 catch (IllegalAccessException e) {
 540                         throwStorageObjectException("Kein Zugriff! -- " + e.toString());
 541                 } catch (IOException e) {
 542                         throwStorageObjectException("IOException! -- " + e.toString());
 543                 } catch (InstantiationException e) {
 544                         throwStorageObjectException("Keine Instantiiierung! -- " + e.toString());
 545                 } catch (SQLException sqe) {
 546                         throwSQLException(sqe, "makeEntityFromResultSet");
 547                         return  null;
 548                 }
 549                 return  returnEntity;
 550         }
 551
 552         /**
 553          * insert-Operator: fügt eine Entity in die Tabelle ein. Eine Spalte WEBDB_CREATE
 554          * wird automatisch mit dem aktuellen Datum gefuellt.
 555          *
 556          * @param theEntity
 557          * @return der Wert des Primary-keys der eingefügten Entity
 558          */
 559         public String insert (Entity theEntity) throws StorageObjectException {
 560                 String returnId = "0";
 561                 Connection con = null;
 562                 PreparedStatement pstmt = null;
 563                 //cache
 564                 invalidatePopupCache();
 565                 try {
 566                         HashMap theEntityValues = theEntity.getValues();
 567                         ArrayList streamedInput = theEntity.streamedInput();
 568                         StringBuffer f = new StringBuffer();
 569                         StringBuffer v = new StringBuffer();
 570                         String aField, aValue;
 571                         boolean firstField = true;
 572                         // make sql-string
 573                         for (int i = 0; i < getFields().size(); i++) {
 574                                 aField = (String)getFields().get(i);
 575                                 if (!aField.equals(thePKeyName)) {
 576                                         aValue = null;
 577                                         // sonderfaelle
 578                                         if (aField.equals("webdb_create")) {
 579                                                 aValue = "NOW()";
 580                                         }
 581                                         else {
 582                                                 if (streamedInput != null && streamedInput.contains(aField)) {
 583                                                         aValue = "?";
 584                                                 }
 585                                                 else {
 586                                                         if (theEntityValues.containsKey(aField)) {
 587                                                                 aValue = "'" + StringUtil.quote((String)theEntityValues.get(aField))
 588                                                                                 + "'";
 589                                                         }
 590                                                 }
 591                                         }
 592                                         // wenn Wert gegeben, dann einbauen
 593                                         if (aValue != null) {
 594                                                 if (firstField == false) {
 595                                                         f.append(",");
 596                                                         v.append(",");
 597                                                 }
 598                                                 else {
 599                                                         firstField = false;
 600                                                 }
 601                                                 f.append(aField);
 602                                                 v.append(aValue);
 603                                         }
 604                                 }
 605                         }         // end for
 606                         // insert into db
 607                         StringBuffer sqlBuf = new StringBuffer("insert into ").append(theTable).append("(").append(f).append(") values (").append(v).append(")");
 608                         String sql = sqlBuf.toString();
 609                         theLog.printInfo("INSERT: " + sql);
 610                         con = getPooledCon();
 611                         con.setAutoCommit(false);
 612                         pstmt = con.prepareStatement(sql);
 613                         if (streamedInput != null) {
 614                                 for (int i = 0; i < streamedInput.size(); i++) {
 615                                         String inputString = (String)theEntityValues.get(streamedInput.get(i));
 616                                         pstmt.setBytes(i + 1, inputString.getBytes());
 617                                 }
 618                         }
 619                         pstmt.execute();
 620                         pstmt = con.prepareStatement(theAdaptor.getLastInsertSQL((Database)myselfDatabase));
 621                         ResultSet rs = pstmt.executeQuery();
 622                         rs.next();
 623                         returnId = rs.getString(1);
 624                         theEntity.setId(returnId);
 625                 } catch (SQLException sqe) {
 626                         throwSQLException(sqe, "insert");
 627                 } finally {
 628                         try {
 629                                 con.setAutoCommit(true);
 630                         } catch (Exception e) {
 631                                 ;
 632                         }
 633                         freeConnection(con, pstmt);
 634                 }
 635                 return  returnId;
 636         }
 637
 638         /**
 639          * update-Operator: aktualisiert eine Entity. Eine Spalte WEBDB_LASTCHANGE
 640          * wird automatisch mit dem aktuellen Datum gefuellt.
 641          *
 642          * @param theEntity
 643          */
 644         public void update (Entity theEntity) throws StorageObjectException {
 645                 Connection con = null;
 646                 PreparedStatement pstmt = null;
 647                 ArrayList streamedInput = theEntity.streamedInput();
 648                 HashMap theEntityValues = theEntity.getValues();
 649                 String id = theEntity.getId();
 650                 String aField;
 651                 StringBuffer fv = new StringBuffer();
 652                 boolean firstField = true;
 653                 //cache
 654                 invalidatePopupCache();
 655                 // build sql statement
 656                 for (int i = 0; i < getFields().size(); i++) {
 657                         aField = (String)metadataFields.get(i);
 658                         // only normal cases
 659                         if (!(aField.equals(thePKeyName) || aField.equals("webdb_create") ||
 660                                         aField.equals("webdb_lastchange") || (streamedInput != null && streamedInput.contains(aField)))) {
 661                                 if (theEntityValues.containsKey(aField)) {
 662                                         if (firstField == false) {
 663                                                 fv.append(", ");
 664                                         }
 665                                         else {
 666                                                 firstField = false;
 667                                         }
 668                                         fv.append(aField).append("='").append(StringUtil.quote((String)theEntityValues.get(aField))).append("'");
 669                                 }
 670                         }
 671                 }
 672                 StringBuffer sql = new StringBuffer("update ").append(theTable).append(" set ").append(fv);
 673                 // exceptions
 674                 if (metadataFields.contains("webdb_lastchange")) {
 675                         sql.append(",webdb_lastchange=NOW()");
 676                 }
 677                 if (streamedInput != null) {
 678                         for (int i = 0; i < streamedInput.size(); i++) {
 679                                 sql.append(",").append(streamedInput.get(i)).append("=?");
 680                         }
 681                 }
 682                 sql.append(" where id=").append(id);
 683                 theLog.printInfo("UPDATE: " + sql);
 684                 // execute sql
 685                 try {
 686                         con = getPooledCon();
 687                         con.setAutoCommit(false);
 688                         pstmt = con.prepareStatement(sql.toString());
 689                         if (streamedInput != null) {
 690                                 for (int i = 0; i < streamedInput.size(); i++) {
 691                                         String inputString = (String)theEntityValues.get(streamedInput.get(i));
 692                                         pstmt.setBytes(i + 1, inputString.getBytes());
 693                                 }
 694                         }
 695                         pstmt.executeUpdate();
 696                 } catch (SQLException sqe) {
 697                         throwSQLException(sqe, "update");
 698                 } finally {
 699                         try {
 700                                 con.setAutoCommit(true);
 701                         } catch (Exception e) {
 702                                 ;
 703                         }
 704                         freeConnection(con, pstmt);
 705                 }
 706         }
 707
 708         /*
 709          *   delete-Operator
 710          *   @param id des zu loeschenden Datensatzes
 711          *   @return boolean liefert true zurueck, wenn loeschen erfolgreich war.
 712          */
 713         public boolean delete (String id) throws StorageObjectException {
 714                 Statement stmt = null;
 715                 Connection con = null;
 716                 String sql;
 717                 int res = 0;
 718                 // loeschen des caches
 719                 invalidatePopupCache();
 720                 sql = "delete from " + theTable + " where " + thePKeyName + "='" + id +
 721                                 "'";
 722                 theLog.printInfo("DELETE " + sql);
 723                 try {
 724                         con = getPooledCon();
 725                         stmt = con.createStatement();
 726                         res = stmt.executeUpdate(sql);
 727                 } catch (SQLException sqe) {
 728                         throwSQLException(sqe, "delete");
 729                 } finally {
 730                         freeConnection(con, stmt);
 731                 }
 732                 if (cache != null) {
 733                         theLog.printInfo("CACHE: deleted " + id);
 734                         cache.remove(id);
 735                 }
 736                 return  (res > 0) ? true : false;
 737         }
 738
 739         /* noch nicht implementiert.
 740          * @return immer false
 741          */
 742         public boolean delete (EntityList theEntityList) {
 743                 invalidatePopupCache();
 744                 return  false;
 745         }
 746
 747         /**
 748          * Diese Methode sollte ueberschrieben werden, wenn fuer die abgeleitete Database-Klasse
 749          * eine SimpleList mit Standard-Popupdaten erzeugt werden koennen soll.
 750          * @return null
 751          */
 752         public SimpleList getPopupData () {
 753                 return  null;
 754         }
 755
 756         /**
 757          *  Holt Daten fuer Popups.
 758          *  @param name  Name des Feldes.
 759          *  @param hasNullValue  Wenn true wird eine leerer  Eintrag fuer die Popups erzeugt.
 760          *  @return SimpleList Gibt freemarker.template.SimpleList zurueck.
 761          */
 762         public SimpleList getPopupData (String name, boolean hasNullValue) {
 763                 return  getPopupData(name, hasNullValue, null);
 764         }
 765
 766         /**
 767          *  Holt Daten fuer Popups.
 768          *  @param name  Name des Feldes.
 769          *  @param hasNullValue  Wenn true wird eine leerer  Eintrag fuer die Popups erzeugt.
 770          *  @param where  Schraenkt die Selektion der Datensaetze ein.
 771          *  @return SimpleList Gibt freemarker.template.SimpleList zurueck.
 772          */
 773         public SimpleList getPopupData (String name, boolean hasNullValue, String where) {
 774                 return  getPopupData(name, hasNullValue, where, null);
 775         }
 776
 777         /**
 778          *  Holt Daten fuer Popups.
 779          *  @param name  Name des Feldes.
 780          *  @param hasNullValue  Wenn true wird eine leerer  Eintrag fuer die Popups erzeugt.
 781          *  @param where  Schraenkt die Selektion der Datensaetze ein.
 782          *  @param order  Gibt ein Feld als Sortierkriterium an.
 783          *  @return SimpleList Gibt freemarker.template.SimpleList zurueck.
 784          */
 785         public SimpleList getPopupData (String name, boolean hasNullValue, String where,
 786                         String order) {
 787                 // caching
 788                 if (hasPopupCache && popupCache != null)
 789                         return  popupCache;
 790                 SimpleList simpleList = null;
 791                 Connection con = null;
 792                 Statement stmt = null;
 793                 // build sql
 794                 StringBuffer sql = new StringBuffer("select ").append(thePKeyName).append(",").append(name).append(" from ").append(theTable);
 795                 if (where != null && !(where.length() == 0))
 796                         sql.append(" where ").append(where);
 797                 sql.append(" order by ");
 798                 if (order != null && !(order.length() == 0))
 799                         sql.append(order);
 800                 else
 801                         sql.append(name);
 802                 // execute sql
 803                 try {
 804                         con = getPooledCon();
 805                         stmt = con.createStatement();
 806                         ResultSet rs = executeSql(stmt, sql.toString());
 807                         if (rs != null) {
 808                                 if (evaluatedMetaData == false)
 809                                         get_meta_data();
 810                                 simpleList = new SimpleList();
 811                                 SimpleHash popupDict;
 812                                 if (hasNullValue) {
 813                                         popupDict = new SimpleHash();
 814                                         popupDict.put("key", "");
 815                                         popupDict.put("value", "--");
 816                                         simpleList.add(popupDict);
 817                                 }
 818                                 while (rs.next()) {
 819                                         popupDict = new SimpleHash();
 820                                         popupDict.put("key", getValueAsString(rs, 1, thePKeyType));
 821                                         popupDict.put("value", rs.getString(2));
 822                                         simpleList.add(popupDict);
 823                                 }
 824                                 rs.close();
 825                         }
 826                 } catch (Exception e) {
 827                         theLog.printDebugInfo(e.toString());
 828                 } finally {
 829                         freeConnection(con, stmt);
 830                 }
 831                 if (hasPopupCache) {
 832                         popupCache = simpleList;
 833                 }
 834                 return  simpleList;
 835         }
 836
 837         /**
 838          * Liefert alle Daten der Tabelle als SimpleHash zurueck. Dies wird verwandt,
 839          * wenn in den Templates ein Lookup-Table benoetigt wird. Sollte nur bei kleinen
 840          * Tabellen Verwendung finden.
 841          * @return SimpleHash mit den Tabellezeilen.
 842          */
 843         public SimpleHash getHashData () {
 844                 if (hashCache == null) {
 845                         try {
 846                                 hashCache = HTMLTemplateProcessor.makeSimpleHash(selectByWhereClause("",
 847                                                 -1));
 848                         } catch (StorageObjectException e) {
 849                                 theLog.printDebugInfo(e.toString());
 850                         }
 851                 }
 852                 return  hashCache;
 853         }
 854
 855         /* invalidates the popupCache
 856          */
 857         private void invalidatePopupCache () {
 858
 859                 /** @todo  invalidates toooo much */
 860                 popupCache = null;
 861                 hashCache = null;
 862         }
 863
 864         /**
 865          * Diese Methode fuehrt den Sqlstring <i>sql</i> aus und timed im Logfile.
 866          * @param stmt Statemnt
 867          * @param sql Sql-String
 868          * @return ResultSet
 869          * @exception StorageObjectException, SQLException
 870          */
 871         public ResultSet executeSql (Statement stmt, String sql) throws StorageObjectException,
 872                         SQLException {
 873                 long startTime = (new java.util.Date()).getTime();
 874                 ResultSet rs = stmt.executeQuery(sql);
 875                 theLog.printInfo((new java.util.Date().getTime() - startTime) + "ms. for: "
 876                                 + sql);
 877                 return  rs;
 878         }
 879
 880         /**
 881          * Fuehrt Statement stmt aus und liefert Resultset zurueck. Das SQL-Statment wird
 882          * getimed und geloggt.
 883          * @param stmt PreparedStatement mit der SQL-Anweisung
 884          * @return Liefert ResultSet des Statements zurueck.
 885          * @exception StorageObjectException, SQLException
 886          */
 887         public ResultSet executeSql (PreparedStatement stmt) throws StorageObjectException,
 888                         SQLException {
 889                 long startTime = (new java.util.Date()).getTime();
 890                 ResultSet rs = stmt.executeQuery();
 891                 theLog.printInfo((new java.util.Date().getTime() - startTime) + "ms.");
 892                 return  rs;
 893         }
 894
 895         /**
 896          * returns the number of rows in the table
 897          */
 898         public int getSize(String where)
 899                 throws SQLException,StorageObjectException
 900         {
 901                 long  startTime = (new java.util.Date()).getTime();
 902                 String sql = "SELECT count(*) FROM "+ theTable + " where " + where;
 903                 //theLog.printDebugInfo("trying: "+ sql);
 904                 Connection con = null;
 905                 Statement stmt = null;
 906                 int result = 0;
 907
 908                 try {
 909                         con = getPooledCon();
 910                         stmt = con.createStatement();
 911                         ResultSet rs = executeSql(stmt,sql);
 912                         while(rs.next()){
 913                                 result = rs.getInt(1);
 914                         }
 915                 } catch (SQLException e) {
 916                         theLog.printError(e.toString());
 917                 } finally {
 918                         freeConnection(con,stmt);
 919                 }
 920                 theLog.printInfo(theTable + " has "+ result +" rows where " + where);
 921                 theLog.printInfo((new java.util.Date().getTime() - startTime) + "ms. for: " + sql);
 922                 return result;
 923         }
 924
 925         public int executeUpdate(Statement stmt, String sql)
 926                 throws StorageObjectException, SQLException
 927         {
 928                 long  startTime = (new java.util.Date()).getTime();
 929                 //theLog.printDebugInfo("trying: "+ sql);
 930                 int rs = stmt.executeUpdate(sql);
 931                 theLog.printInfo((new java.util.Date().getTime() - startTime) + "ms. for: " + sql);
 932                 return rs;
 933         }
 934
 935         public int executeUpdate(String sql)
 936                 throws StorageObjectException, SQLException
 937         {
 938                 int result=-1;
 939                 long  startTime = (new java.util.Date()).getTime();
 940                 Connection con=null;PreparedStatement pstmt=null;
 941                 try {
 942                         con=getPooledCon();
 943                         pstmt = con.prepareStatement(sql);
 944                         result = pstmt.executeUpdate();
 945                 }
 946                 catch (Exception e) {theLog.printDebugInfo("settimage :: setImage gescheitert: "+e.toString());}
 947                 finally {       freeConnection(con,pstmt); }
 948                 theLog.printInfo((new java.util.Date().getTime() - startTime) + "ms. for: " + sql);
 949                 return result;
 950         }
 951
 952         /**
 953          * Wertet ResultSetMetaData aus und setzt interne Daten entsprechend
 954          * @param md ResultSetMetaData
 955          * @exception StorageObjectException
 956          */
 957         private void evalMetaData (ResultSetMetaData md) throws StorageObjectException {
 958                 this.evaluatedMetaData = true;
 959                 this.metadataFields = new ArrayList();
 960                 this.metadataLabels = new ArrayList();
 961                 this.metadataNotNullFields = new ArrayList();
 962                 try {
 963                         int numFields = md.getColumnCount();
 964                         this.metadataTypes = new int[numFields];
 965                         String aField;
 966                         int aType;
 967                         for (int i = 1; i <= numFields; i++) {
 968                                 aField = md.getColumnName(i);
 969                                 metadataFields.add(aField);
 970                                 metadataLabels.add(md.getColumnLabel(i));
 971                                 aType = md.getColumnType(i);
 972                                 metadataTypes[i - 1] = aType;
 973                                 if (aField.equals(thePKeyName)) {
 974                                         thePKeyType = aType;
 975                                 }
 976                                 if (md.isNullable(i) == md.columnNullable) {
 977                                         metadataNotNullFields.add(aField);
 978                                 }
 979                         }
 980                 } catch (SQLException e) {
 981                         throwSQLException(e, "evalMetaData");
 982                 }
 983         }
 984
 985         /**
 986          *  Wertet die Metadaten eines Resultsets fuer eine Tabelle aus,
 987          *  um die alle Columns und Typen einer Tabelle zu ermitteln.
 988          */
 989         private void get_meta_data () throws StorageObjectException {
 990                 Connection con = null;
 991                 PreparedStatement pstmt = null;
 992                 String sql = "select * from " + theTable + " where 0=1";
 993                 try {
 994                         con = getPooledCon();
 995                         pstmt = con.prepareStatement(sql);
 996                         theLog.printInfo("METADATA: " + sql);
 997                         ResultSet rs = pstmt.executeQuery();
 998                         evalMetaData(rs.getMetaData());
 999                         rs.close();
1000                 } catch (SQLException e) {
1001                         throwSQLException(e, "get_meta_data");
1002                 } finally {
1003                         freeConnection(con, pstmt);
1004                 }
1005         }
1006
1007         /**
1008          * Datenbankverbindung wird geschlossen
1009          */
1010         public void disconnectPool () {
1011                 try {
1012                         myBroker.destroy(100);
1013                 } catch (SQLException sqe) {
1014                         ;
1015                 }
1016         }
1017
1018         /**
1019          * Liefert ein Connection-Objekt aus dem ConnectionPool.
1020          * @return Connection Objekt.
1021          */
1022         public Connection getPooledCon () throws StorageObjectException {
1023                 if (myBroker != null) {
1024                         Connection con = myBroker.getConnection();
1025                         if (con != null)
1026                                 return  con;
1027                 }
1028                 throw  new StorageObjectException("KEINE VERBINDUNG ZUR DATENBANK");
1029         }
1030
1031         /**
1032          * Connection und StatementObjekt werden geschlossen und an den Connectionpool
1033          * zurückgeben
1034          * @param con Connection zur Datenbank
1035          * @param stmt Statement-Objekt
1036          */
1037         public void freeConnection (Connection con, Statement stmt) {
1038                 try {
1039                         if (stmt != null)
1040                                 stmt.close();
1041                 } catch (SQLException e1) {
1042                         theLog.printDebugInfo(e1.toString());
1043                 }
1044                 if (con != null)
1045                         myBroker.freeConnection(con);
1046                 else
1047                         theLog.printDebugInfo("Con was null!");
1048         }
1049
1050         /**
1051          * Wertet SQLException aus und wirft dannach eine StorageObjectException
1052          * @param sqe SQLException
1053          * @param wo Funktonsname, in der die SQLException geworfen wurde
1054          * @exception StorageObjectException
1055          */
1056         void throwSQLException (SQLException sqe, String wo) throws StorageObjectException {
1057                 String state = "";
1058                 String message = "";
1059                 int vendor = 0;
1060                 if (sqe != null) {
1061                         state = sqe.getSQLState();
1062                         message = sqe.getMessage();
1063                         vendor = sqe.getErrorCode();
1064                 }
1065                 theLog.printError(state + ": " + vendor + " : " + message + " Funktion: "
1066                                 + wo);
1067                 throw  new StorageObjectException((sqe == null) ? "undefined sql exception" :
1068                                 sqe.toString());
1069         }
1070
1071         /**
1072          * Loggt Fehlermeldung mit dem Parameter Message und wirft dannach eine StorageObjectException
1073          * @param message Nachricht mit dem Fehler
1074          * @exception StorageObjectException
1075          */
1076         void throwStorageObjectException (String message) throws StorageObjectException {
1077                 theLog.printError(message);
1078                 throw  new StorageObjectException(message);
1079         }
1080 }
1081
1082
1083