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Diffstat (limited to 'jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/CollectionAspectAdapter.java')
-rw-r--r--jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/CollectionAspectAdapter.java239
1 files changed, 0 insertions, 239 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/CollectionAspectAdapter.java b/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/CollectionAspectAdapter.java
deleted file mode 100644
index 2aeede9576..0000000000
--- a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/CollectionAspectAdapter.java
+++ /dev/null
@@ -1,239 +0,0 @@
-/*******************************************************************************
- * Copyright (c) 2007, 2008 Oracle. All rights reserved.
- * This program and the accompanying materials are made available under the
- * terms of the Eclipse Public License v1.0, which accompanies this distribution
- * and is available at http://www.eclipse.org/legal/epl-v10.html.
- *
- * Contributors:
- * Oracle - initial API and implementation
- ******************************************************************************/
-package org.eclipse.jpt.utility.internal.model.value;
-
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.Iterator;
-
-import org.eclipse.jpt.utility.internal.CollectionTools;
-import org.eclipse.jpt.utility.internal.iterators.EmptyIterator;
-import org.eclipse.jpt.utility.model.Model;
-import org.eclipse.jpt.utility.model.event.CollectionChangeEvent;
-import org.eclipse.jpt.utility.model.listener.ChangeListener;
-import org.eclipse.jpt.utility.model.listener.CollectionChangeListener;
-import org.eclipse.jpt.utility.model.value.CollectionValueModel;
-import org.eclipse.jpt.utility.model.value.PropertyValueModel;
-
-/**
- * This extension of AspectAdapter provides CollectionChange support.
- * This allows us to convert a set of one or more collections into
- * a single collection, VALUES.
- *
- * The typical subclass will override the following methods:
- * #iterator_()
- * at the very minimum, override this method to return an iterator on the
- * subject's collection aspect; it does not need to be overridden if
- * #iterator() is overridden and its behavior changed
- * #size_()
- * override this method to improve performance; it does not need to be overridden if
- * #size() is overridden and its behavior changed
- * #iterator()
- * override this method only if returning an empty iterator when the
- * subject is null is unacceptable
- * #size()
- * override this method only if returning a zero when the
- * subject is null is unacceptable
- */
-public abstract class CollectionAspectAdapter<S extends Model, E>
- extends AspectAdapter<S>
- implements CollectionValueModel<E>
-{
- /**
- * The name of the subject's collections that we use for the value.
- */
- protected final String[] collectionNames;
- protected static final String[] EMPTY_COLLECTION_NAMES = new String[0];
-
- /** A listener that listens to the subject's collection aspect. */
- protected final CollectionChangeListener collectionChangeListener;
-
-
- // ********** constructors **********
-
- /**
- * Construct a CollectionAspectAdapter for the specified subject
- * and collection.
- */
- protected CollectionAspectAdapter(String collectionName, S subject) {
- this(new String[] {collectionName}, subject);
- }
-
- /**
- * Construct a CollectionAspectAdapter for the specified subject
- * and collections.
- */
- protected CollectionAspectAdapter(String[] collectionNames, S subject) {
- this(new StaticPropertyValueModel<S>(subject), collectionNames);
- }
-
- /**
- * Construct a CollectionAspectAdapter for the specified subject holder
- * and collections.
- */
- protected CollectionAspectAdapter(PropertyValueModel<? extends S> subjectHolder, String... collectionNames) {
- super(subjectHolder);
- this.collectionNames = collectionNames;
- this.collectionChangeListener = this.buildCollectionChangeListener();
- }
-
- /**
- * Construct a CollectionAspectAdapter for the specified subject holder
- * and collections.
- */
- protected CollectionAspectAdapter(PropertyValueModel<? extends S> subjectHolder, Collection<String> collectionNames) {
- this(subjectHolder, collectionNames.toArray(new String[collectionNames.size()]));
- }
-
- /**
- * Construct a CollectionAspectAdapter for an "unchanging" collection in
- * the specified subject. This is useful for a collection aspect that does not
- * change for a particular subject; but the subject will change, resulting in
- * a new collection.
- */
- protected CollectionAspectAdapter(PropertyValueModel<? extends S> subjectHolder) {
- this(subjectHolder, EMPTY_COLLECTION_NAMES);
- }
-
-
- // ********** initialization **********
-
- /**
- * The subject's collection aspect has changed, notify the listeners.
- */
- protected CollectionChangeListener buildCollectionChangeListener() {
- // transform the subject's collection change events into VALUE collection change events
- return new CollectionChangeListener() {
- public void itemsAdded(CollectionChangeEvent event) {
- CollectionAspectAdapter.this.itemsAdded(event);
- }
- public void itemsRemoved(CollectionChangeEvent event) {
- CollectionAspectAdapter.this.itemsRemoved(event);
- }
- public void collectionCleared(CollectionChangeEvent event) {
- CollectionAspectAdapter.this.collectionCleared(event);
- }
- public void collectionChanged(CollectionChangeEvent event) {
- CollectionAspectAdapter.this.collectionChanged(event);
- }
- @Override
- public String toString() {
- return "collection change listener: " + Arrays.asList(CollectionAspectAdapter.this.collectionNames);
- }
- };
- }
-
-
- // ********** CollectionValueModel implementation **********
-
- /**
- * Return the elements of the subject's collection aspect.
- */
- public Iterator<E> iterator() {
- return (this.subject == null) ? EmptyIterator.<E>instance() : this.iterator_();
- }
-
- /**
- * Return the elements of the subject's collection aspect.
- * At this point we can be sure that the subject is not null.
- * @see #iterator()
- */
- protected Iterator<E> iterator_() {
- throw new UnsupportedOperationException();
- }
-
- /**
- * Return the size of the subject's collection aspect.
- */
- public int size() {
- return (this.subject == null) ? 0 : this.size_();
- }
-
- /**
- * Return the size of the subject's collection aspect.
- * At this point we can be sure that the subject is not null.
- * @see #size()
- */
- protected int size_() {
- return CollectionTools.size(this.iterator());
- }
-
-
- // ********** AspectAdapter implementation **********
-
- @Override
- protected Object value() {
- return this.iterator();
- }
-
- @Override
- protected Class<? extends ChangeListener> listenerClass() {
- return CollectionChangeListener.class;
- }
-
- @Override
- protected String listenerAspectName() {
- return VALUES;
- }
-
- @Override
- protected boolean hasListeners() {
- return this.hasAnyCollectionChangeListeners(VALUES);
- }
-
- @Override
- protected void fireAspectChange(Object oldValue, Object newValue) {
- this.fireCollectionChanged(VALUES);
- }
-
- @Override
- protected void engageSubject_() {
- for (String collectionName : this.collectionNames) {
- ((Model) this.subject).addCollectionChangeListener(collectionName, this.collectionChangeListener);
- }
- }
-
- @Override
- protected void disengageSubject_() {
- for (String collectionName : this.collectionNames) {
- ((Model) this.subject).removeCollectionChangeListener(collectionName, this.collectionChangeListener);
- }
- }
-
- @Override
- public void toString(StringBuilder sb) {
- for (int i = 0; i < this.collectionNames.length; i++) {
- if (i != 0) {
- sb.append(", ");
- }
- sb.append(this.collectionNames[i]);
- }
- }
-
-
- // ********** behavior **********
-
- protected void itemsAdded(CollectionChangeEvent event) {
- this.fireItemsAdded(event.cloneWithSource(this, VALUES));
- }
-
- protected void itemsRemoved(CollectionChangeEvent event) {
- this.fireItemsRemoved(event.cloneWithSource(this, VALUES));
- }
-
- protected void collectionCleared(CollectionChangeEvent event) {
- this.fireCollectionCleared(VALUES); // nothing from original event to forward
- }
-
- protected void collectionChanged(CollectionChangeEvent event) {
- this.fireCollectionChanged(VALUES); // nothing from original event to forward
- }
-
-}

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