diff options
Diffstat (limited to 'jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/CollectionPropertyValueModelAdapter.java')
-rw-r--r-- | jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/CollectionPropertyValueModelAdapter.java | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/CollectionPropertyValueModelAdapter.java b/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/CollectionPropertyValueModelAdapter.java deleted file mode 100644 index a28ff711db..0000000000 --- a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/CollectionPropertyValueModelAdapter.java +++ /dev/null @@ -1,140 +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 org.eclipse.jpt.utility.model.event.CollectionChangeEvent; -import org.eclipse.jpt.utility.model.listener.CollectionChangeListener; -import org.eclipse.jpt.utility.model.value.CollectionValueModel; - -/** - * This abstract class provides the infrastructure needed to wrap - * a collection value model, "lazily" listen to it, and convert - * its change notifications into property value model change - * notifications. - * - * Subclasses must override: - * - #buildValue() - * to return the current property value, as derived from the - * current collection value - * - * Subclasses might want to override: - * - #itemsAdded(CollectionChangeEvent event) - * - #itemsRemoved(CollectionChangeEvent event) - * - #collectionCleared(CollectionChangeEvent event) - * - #collectionChanged(CollectionChangeEvent event) - * to improve performance (by not recalculating the value, if possible) - */ -public abstract class CollectionPropertyValueModelAdapter<T> - extends AspectPropertyValueModelAdapter<T> -{ - /** The wrapped collection value model. */ - protected final CollectionValueModel<?> collectionHolder; - - /** A listener that allows us to synch with changes to the wrapped collection holder. */ - protected final CollectionChangeListener collectionChangeListener; - - - // ********** constructor/initialization ********** - - /** - * Construct a property value model with the specified wrapped - * collection value model. - */ - protected CollectionPropertyValueModelAdapter(CollectionValueModel<?> collectionHolder) { - super(); - this.collectionHolder = collectionHolder; - this.collectionChangeListener = this.buildCollectionChangeListener(); - } - - protected CollectionChangeListener buildCollectionChangeListener() { - return new CollectionChangeListener() { - public void itemsAdded(CollectionChangeEvent event) { - CollectionPropertyValueModelAdapter.this.itemsAdded(event); - } - public void itemsRemoved(CollectionChangeEvent event) { - CollectionPropertyValueModelAdapter.this.itemsRemoved(event); - } - public void collectionCleared(CollectionChangeEvent event) { - CollectionPropertyValueModelAdapter.this.collectionCleared(event); - } - public void collectionChanged(CollectionChangeEvent event) { - CollectionPropertyValueModelAdapter.this.collectionChanged(event); - } - @Override - public String toString() { - return "collection change listener"; - } - }; - } - - - // ********** behavior ********** - - /** - * Start listening to the collection holder. - */ - @Override - protected void engageModel_() { - this.collectionHolder.addCollectionChangeListener(CollectionValueModel.VALUES, this.collectionChangeListener); - } - - /** - * Stop listening to the collection holder. - */ - @Override - protected void disengageModel_() { - this.collectionHolder.removeCollectionChangeListener(CollectionValueModel.VALUES, this.collectionChangeListener); - } - - @Override - public void toString(StringBuilder sb) { - sb.append(this.collectionHolder); - } - - - // ********** collection change support ********** - - /** - * Items were added to the wrapped collection holder; - * propagate the change notification appropriately. - */ - protected void itemsAdded(CollectionChangeEvent event) { - // by default, simply recalculate the value and fire an event - this.propertyChanged(); - } - - /** - * Items were removed from the wrapped collection holder; - * propagate the change notification appropriately. - */ - protected void itemsRemoved(CollectionChangeEvent event) { - // by default, simply recalculate the value and fire an event - this.propertyChanged(); - } - - /** - * The wrapped collection holder was cleared; - * propagate the change notification appropriately. - */ - protected void collectionCleared(CollectionChangeEvent event) { - // by default, simply recalculate the value and fire an event - this.propertyChanged(); - } - - /** - * The value of the wrapped collection holder has changed; - * propagate the change notification appropriately. - */ - protected void collectionChanged(CollectionChangeEvent event) { - // by default, simply recalculate the value and fire an event - this.propertyChanged(); - } - -} |