/*
- * Copyright (C) 2001, 2002 The Mir-coders group
+ * Copyright (C) 2005 The Mir-coders group
*
* This file is part of Mir.
*
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* In addition, as a special exception, The Mir-coders gives permission to link
- * the code of this program with any library licensed under the Apache Software License,
- * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
- * (or with modified versions of the above that use the same license as the above),
- * and distribute linked combinations including the two. You must obey the
- * GNU General Public License in all respects for all of the code used other than
- * the above mentioned libraries. If you modify this file, you may extend this
+ * the code of this program with any library licensed under the Apache Software License.
+ * You must obey the GNU General Public License in all respects for all of the code used
+ * other than the above mentioned libraries. If you modify this file, you may extend this
* exception to your version of the file, but you are not obligated to do so.
* If you do not wish to do so, delete this exception statement from your version.
*/
package mir.entity.adapter;
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-
import mir.entity.Entity;
import mir.util.CachingRewindableIterator;
-
-public class EntityAdapter implements Map {
+import mir.util.RewindableIterator;
+
+import java.util.*;
+
+/** An EntityAdapter is a wrapper around an Entity meant to add
+ * missing functionality. It provides "calculated fields"
+ * which mir installations can extend reasonably easilly.
+ * "calculated fields" compute values that are not directly present
+ * in the db table. For example:
+ * a field to have the number of comments associated with an article;
+ * a field to get the list of hidden comments associated with an article;
+ * etc.
+ * <p>This whole framework is meant to be replaced by hibernate</p>
+ */
+public class EntityAdapter {
private Entity entity;
private EntityAdapterDefinition definition;
private Map calculatedFieldsCache;
model = aModel;
}
- public boolean containsKey(Object aKey) {
- try {
- if (aKey instanceof String)
- return entity.hasField((String) aKey)
- || definition.hasCalculatedField((String) aKey);
- }
- catch (Throwable t) {
- }
-
- return false;
- }
-
public boolean equals(Object anObject) {
return anObject instanceof EntityAdapter
&& ((EntityAdapter) anObject).entity.equals(entity);
}
public int hashCode() {
- return entity.hashCode();
+ if (entity!=null) {
+ return entity.hashCode();
+ }
+ else {
+ return 0;
+ }
}
public Entity getEntity() {
return model;
}
- public Object get(Object aKey) {
+ public Object get(String aKey) {
Object result;
if (calculatedFieldsCache.containsKey(aKey)) {
return calculatedFieldsCache.get(aKey);
}
- else if (aKey instanceof String && definition.hasCalculatedField((String) aKey)) {
- result = definition.getCalculatedField((String) aKey).getValue(this);
+ else if (definition.hasCalculatedField(aKey)) {
+ result = definition.getCalculatedField(aKey).getValue(this);
calculatedFieldsCache.put(aKey, result);
return result;
}
- else if (aKey instanceof String) {
- return entity.getFieldValue((String) aKey);
- }
else {
- return null;
+ return entity.getFieldValue(aKey);
}
}
- public boolean isEmpty() {
- return false;
- }
-
- public Set keySet() {
- throw new UnsupportedOperationException("EntityAdapter.keySet()");
- }
+ public Iterator getIterator(String aKey) {
+ Object result = get(aKey);
- public Object put(Object aKey, Object value) {
- throw new UnsupportedOperationException("EntityAdapter.put()");
- }
-
- public void putAll(Map t) {
- throw new UnsupportedOperationException("EntityAdapter.putAll()");
- }
-
- public Object remove(Object aKey) {
- throw new UnsupportedOperationException("EntityAdapter.remove()");
- }
-
- public int size() {
- throw new UnsupportedOperationException("EntityAdapter.size()");
- }
-
- public Collection values() {
- throw new UnsupportedOperationException("EntityAdapter.values()");
- }
-
- public void clear() {
- throw new UnsupportedOperationException("EntityAdapter.clear()");
- }
-
- public boolean containsValue(Object value) {
- throw new UnsupportedOperationException("EntityAdapter.containsValue()");
- }
-
- public Set entrySet() {
- throw new UnsupportedOperationException("EntityAdapter.entrySet()");
+ if (result instanceof RewindableIterator) {
+ ((RewindableIterator) result).rewind();
+ return (RewindableIterator) result;
+ }
+ else if (result instanceof Iterator) {
+ return (Iterator) result;
+ }
+ else if (result instanceof Collection) {
+ return ((Collection) result).iterator();
+ }
+ else if (result!=null) {
+ return Collections.singletonList(result).iterator();
+ }
+ else {
+ return null;
+ }
}
public Object getComplexRelation(String aMainTablePrefix, List someExtraTables,
}
- public Object getRelation(String aWhereClause, String anOrderByClause, String aDefinition) {
+ public List getRelation(String aWhereClause, String anOrderByClause, String aDefinition) {
try {
- return
- new CachingRewindableIterator(
- new EntityIteratorAdapter(
- aWhereClause, anOrderByClause, -1, getModel(), aDefinition));
+ return EntityAdapterEngine.retrieveAdapterList(model, aDefinition, aWhereClause, anOrderByClause, -1, 0);
}
catch (Throwable t) {
throw new RuntimeException(t.getMessage());
if (i.hasNext())
return (EntityAdapter) i.next();
- else
- return null;
+ return null;
}
catch (Throwable t) {
throw new RuntimeException(t.getMessage());
if (i.hasNext())
return (EntityAdapter) i.next();
- else
- return null;
+ return null;
}
catch (Throwable t) {
throw new RuntimeException(t.getMessage());
projects / mir.git / blobdiff