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