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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 | 198 |
1 files changed, 0 insertions, 198 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 0654c0694c..0000000000 --- a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/CompositePropertyValueModel.java +++ /dev/null @@ -1,198 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2009, 2010 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.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. - */ -public abstract class CompositePropertyValueModel<V> - extends CollectionPropertyValueModelAdapter<V> -{ - /** - * 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<?>> componentPVMs = - new IdentityHashBag<PropertyValueModel<?>>(); - - /** - * Listen to every property value model in the collection value model. - * If one changes, we need to re-calculate our value. - */ - protected final PropertyChangeListener propertyChangeListener; - - - // ********** constructors ********** - - /** - * Construct a property value model that is a composite of the specified - * property value models. - */ - public CompositePropertyValueModel(PropertyValueModel<?>... collection) { - this(Arrays.asList(collection)); - } - - /** - * Construct a property value model that is a composite of the specified - * property value models. - */ - public <E extends PropertyValueModel<?>> CompositePropertyValueModel(Collection<E> collection) { - this(new StaticCollectionValueModel<E>(collection)); - } - - /** - * Construct a property value model that is a composite of the specified - * property value models. - */ - public CompositePropertyValueModel(CollectionValueModel<? extends PropertyValueModel<?>> collectionModel) { - super(collectionModel); - this.propertyChangeListener = this.buildPropertyChangeListener(); - } - - - // ********** initialization ********** - - protected PropertyChangeListener buildPropertyChangeListener() { - return new PropertyChangeListener() { - public void propertyChanged(PropertyChangeEvent event) { - CompositePropertyValueModel.this.propertyChanged(event); - } - @Override - public String toString() { - return "property change listener"; //$NON-NLS-1$ - } - }; - } - - - // ********** 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 propertyChanged(@SuppressWarnings("unused") PropertyChangeEvent event) { - this.propertyChanged(); - } - - - // ********** CollectionPropertyValueModelAdapter overrides ********** - - @Override - protected void engageModel_() { - super.engageModel_(); - this.addComponentPVMs(this.getCollectionModel()); - } - - protected <E extends PropertyValueModel<?>> void addComponentPVMs(Iterable<E> pvms) { - for (PropertyValueModel<?> each : pvms) { - this.componentPVMs.add(each); - each.addPropertyChangeListener(VALUE, this.propertyChangeListener); - } - } - - @Override - protected void disengageModel_() { - this.removeComponentPVMs(this.getCollectionModel()); - super.disengageModel_(); - } - - protected <E extends PropertyValueModel<?>> void removeComponentPVMs(Iterable<E> pvms) { - for (PropertyValueModel<?> each : pvms) { - each.removePropertyChangeListener(VALUE, this.propertyChangeListener); - 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<?>> copy = new ArrayList<PropertyValueModel<?>>(this.componentPVMs); - this.removeComponentPVMs(copy); - } - - @Override - protected void collectionChanged(CollectionChangeEvent event) { - this.removeAllComponentPVMs(); - this.addComponentPVMs(this.getCollectionModel()); - super.collectionChanged(event); - } - - - // ********** convenience methods ********** - - /** - * Our constructor accepts only a {@link CollectionValueModel}{@code<? extends }{@link PropertyValueModel}{@code<?>>}. - */ - // minimize scope of suppressed warnings - @SuppressWarnings("unchecked") - protected CollectionValueModel<? extends PropertyValueModel<?>> getCollectionModel() { - return (CollectionValueModel<? extends PropertyValueModel<?>>) this.collectionModel; - } - - /** - * Our constructor accepts only a {@link CollectionValueModel}{@code<? extends }{@link PropertyValueModel}{@code<?>>}. - */ - @SuppressWarnings("unchecked") - protected Iterable<? extends PropertyValueModel<?>> getItems(CollectionAddEvent event) { - return (Iterable<? extends PropertyValueModel<?>>) event.getItems(); - } - - /** - * Our constructor accepts only a {@link CollectionValueModel}{@code<? extends }{@link PropertyValueModel}{@code<?>>}. - */ - @SuppressWarnings("unchecked") - protected Iterable<? extends PropertyValueModel<?>> getItems(CollectionRemoveEvent event) { - return (Iterable<? extends PropertyValueModel<?>>) event.getItems(); - } - -} |