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Diffstat (limited to 'common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/CompositePropertyValueModel.java')
| -rw-r--r-- | common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/CompositePropertyValueModel.java | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/CompositePropertyValueModel.java b/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/CompositePropertyValueModel.java deleted file mode 100644 index 5731fab0c3..0000000000 --- a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/CompositePropertyValueModel.java +++ /dev/null @@ -1,197 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2009, 2012 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.common.utility.internal.model.value; - -import java.util.ArrayList; -import java.util.Arrays; -import java.util.Collection; -import org.eclipse.jpt.common.utility.internal.IdentityHashBag; -import org.eclipse.jpt.common.utility.model.event.CollectionAddEvent; -import org.eclipse.jpt.common.utility.model.event.CollectionChangeEvent; -import org.eclipse.jpt.common.utility.model.event.CollectionClearEvent; -import org.eclipse.jpt.common.utility.model.event.CollectionRemoveEvent; -import org.eclipse.jpt.common.utility.model.event.PropertyChangeEvent; -import org.eclipse.jpt.common.utility.model.listener.PropertyChangeAdapter; -import org.eclipse.jpt.common.utility.model.listener.PropertyChangeListener; -import org.eclipse.jpt.common.utility.model.value.CollectionValueModel; -import org.eclipse.jpt.common.utility.model.value.PropertyValueModel; - -/** - * A <code>CompositePropertyValueModel</code> adapts a - * {@link CollectionValueModel} holding other {@link PropertyValueModel}s - * to a single {@link PropertyValueModel}. - * <p> - * Subclasses must implement:<ul> - * <li>{@link #buildValue()}<p> - * to return the current property value, as derived from the - * component values - * </ul> - * <strong>NB:</strong> The wrapped collection must not contain any duplicates - * or this class will throw an exception. - * - * @param <V> the type of the model's value - * @param <E> the type of the wrapped collection value model's - * property value model's values - */ -public abstract class CompositePropertyValueModel<V, E> - extends CollectionPropertyValueModelAdapter<V, PropertyValueModel<? extends E>> -{ - /** - * Cache the component property value models so we can stop listening to - * them when they are removed from the collection value model. - */ - protected final IdentityHashBag<PropertyValueModel<? extends E>> componentPVMs = - new IdentityHashBag<PropertyValueModel<? extends E>>(); - - /** - * Listen to every property value model in the collection value model. - * If one changes, we need to re-calculate our value. - */ - protected final PropertyChangeListener componentListener; - - - // ********** constructors ********** - - /** - * Construct a property value model that is a composite of the specified - * property value models. - */ - public CompositePropertyValueModel(PropertyValueModel<? extends E>... collection) { - this(Arrays.asList(collection)); - } - - /** - * Construct a property value model that is a composite of the specified - * property value models. - */ - public <P extends PropertyValueModel<? extends E>> CompositePropertyValueModel(Collection<? extends P> collection) { - this(new StaticCollectionValueModel<P>(collection)); - } - - /** - * Construct a property value model that is a composite of the specified - * property value models. - */ - public <P extends PropertyValueModel<? extends E>> CompositePropertyValueModel(CollectionValueModel<P> collectionModel) { - super(collectionModel); - this.componentListener = this.buildComponentListener(); - } - - - // ********** initialization ********** - - protected PropertyChangeListener buildComponentListener() { - return new ComponentListener(); - } - - protected class ComponentListener - extends PropertyChangeAdapter - { - @Override - public void propertyChanged(PropertyChangeEvent event) { - CompositePropertyValueModel.this.componentChanged(event); - } - } - - - // ********** behavior ********** - - /** - * Subclasses can override this method if the event can be used to improve - * the performance of building a new value (e.g. some property changes may - * not necessitate the re-calculation of the value). - */ - protected void componentChanged(@SuppressWarnings("unused") PropertyChangeEvent event) { - this.propertyChanged(); - } - - - // ********** CollectionPropertyValueModelAdapter overrides ********** - - @Override - protected void engageModel_() { - super.engageModel_(); - this.addComponentPVMs(this.collectionModel); - } - - protected <P extends PropertyValueModel<? extends E>> void addComponentPVMs(Iterable<P> pvms) { - for (P each : pvms) { - this.componentPVMs.add(each); - each.addPropertyChangeListener(VALUE, this.componentListener); - } - } - - @Override - protected void disengageModel_() { - this.removeComponentPVMs(this.collectionModel); - super.disengageModel_(); - } - - protected <P extends PropertyValueModel<? extends E>> void removeComponentPVMs(Iterable<P> pvms) { - for (P each : pvms) { - each.removePropertyChangeListener(VALUE, this.componentListener); - this.componentPVMs.remove(each); - } - } - - @Override - protected void itemsAdded(CollectionAddEvent event) { - this.addComponentPVMs(this.getItems(event)); - super.itemsAdded(event); - } - - @Override - protected void itemsRemoved(CollectionRemoveEvent event) { - this.removeComponentPVMs(this.getItems(event)); - super.itemsRemoved(event); - } - - @Override - protected void collectionCleared(CollectionClearEvent event) { - this.removeAllComponentPVMs(); - super.collectionCleared(event); - } - - protected void removeAllComponentPVMs() { - // copy the list so we don't eat our own tail - ArrayList<PropertyValueModel<? extends E>> copy = new ArrayList<PropertyValueModel<? extends E>>(this.componentPVMs); - this.removeComponentPVMs(copy); - } - - @Override - protected void collectionChanged(CollectionChangeEvent event) { - this.removeAllComponentPVMs(); - this.addComponentPVMs(this.collectionModel); - super.collectionChanged(event); - } - - - // ********** convenience methods ********** - - /** - * Our constructor accepts only a - * {@link CollectionValueModel}{@code<? extends }{@link PropertyValueModel}{@code<? extends E>>}. - */ - // minimize scope of suppressed warnings - @SuppressWarnings("unchecked") - protected Iterable<? extends PropertyValueModel<? extends E>> getItems(CollectionAddEvent event) { - return (Iterable<? extends PropertyValueModel<? extends E>>) event.getItems(); - } - - /** - * Our constructor accepts only a - * {@link CollectionValueModel}{@code<? extends }{@link PropertyValueModel}{@code<? extends E>>}. - */ - // minimize scope of suppressed warnings - @SuppressWarnings("unchecked") - protected Iterable<? extends PropertyValueModel<? extends E>> getItems(CollectionRemoveEvent event) { - return (Iterable<? extends PropertyValueModel<? extends E>>) event.getItems(); - } -} |