diff options
Diffstat (limited to 'jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/ListValueModelWrapper.java')
-rw-r--r-- | jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/ListValueModelWrapper.java | 207 |
1 files changed, 0 insertions, 207 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/ListValueModelWrapper.java b/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/ListValueModelWrapper.java deleted file mode 100644 index 3eb604dfd5..0000000000 --- a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/ListValueModelWrapper.java +++ /dev/null @@ -1,207 +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.ListIterator; - -import org.eclipse.jpt.utility.internal.model.AbstractModel; -import org.eclipse.jpt.utility.internal.model.ChangeSupport; -import org.eclipse.jpt.utility.internal.model.SingleAspectChangeSupport; -import org.eclipse.jpt.utility.model.event.ListChangeEvent; -import org.eclipse.jpt.utility.model.listener.ListChangeListener; -import org.eclipse.jpt.utility.model.value.ListValueModel; - -/** - * This abstract class provides the infrastructure needed to wrap - * another list value model, "lazily" listen to it, and propagate - * its change notifications. - */ -public abstract class ListValueModelWrapper<E> - extends AbstractModel -{ - - /** The wrapped list value model. */ - protected final ListValueModel<? extends E> listHolder; - - /** A listener that allows us to synch with changes to the wrapped list holder. */ - protected final ListChangeListener listChangeListener; - - - // ********** constructors ********** - - /** - * Construct a list value model with the specified wrapped - * list value model. - */ - protected ListValueModelWrapper(ListValueModel<? extends E> listHolder) { - super(); - if (listHolder == null) { - throw new NullPointerException(); - } - this.listHolder = listHolder; - this.listChangeListener = this.buildListChangeListener(); - } - - - // ********** initialization ********** - - @Override - protected ChangeSupport buildChangeSupport() { - return new SingleAspectChangeSupport(this, ListChangeListener.class, ListValueModel.LIST_VALUES); - } - - protected ListChangeListener buildListChangeListener() { - return new ListChangeListener() { - public void itemsAdded(ListChangeEvent event) { - ListValueModelWrapper.this.itemsAdded(event); - } - public void itemsRemoved(ListChangeEvent event) { - ListValueModelWrapper.this.itemsRemoved(event); - } - public void itemsReplaced(ListChangeEvent event) { - ListValueModelWrapper.this.itemsReplaced(event); - } - public void itemsMoved(ListChangeEvent event) { - ListValueModelWrapper.this.itemsMoved(event); - } - public void listCleared(ListChangeEvent event) { - ListValueModelWrapper.this.listCleared(event); - } - public void listChanged(ListChangeEvent event) { - ListValueModelWrapper.this.listChanged(event); - } - @Override - public String toString() { - return "list change listener"; - } - }; - } - - - // ********** extend change support ********** - - /** - * Extend to start listening to the nested model if necessary. - */ - @Override - public synchronized void addListChangeListener(ListChangeListener listener) { - if (this.hasNoListChangeListeners(ListValueModel.LIST_VALUES)) { - this.engageModel(); - } - super.addListChangeListener(listener); - } - - /** - * Extend to start listening to the nested model if necessary. - */ - @Override - public synchronized void addListChangeListener(String listName, ListChangeListener listener) { - if (listName == ListValueModel.LIST_VALUES && this.hasNoListChangeListeners(ListValueModel.LIST_VALUES)) { - this.engageModel(); - } - super.addListChangeListener(listName, listener); - } - - /** - * Extend to stop listening to the nested model if necessary. - */ - @Override - public synchronized void removeListChangeListener(ListChangeListener listener) { - super.removeListChangeListener(listener); - if (this.hasNoListChangeListeners(ListValueModel.LIST_VALUES)) { - this.disengageModel(); - } - } - - /** - * Extend to stop listening to the nested model if necessary. - */ - @Override - public synchronized void removeListChangeListener(String listName, ListChangeListener listener) { - super.removeListChangeListener(listName, listener); - if (listName == ListValueModel.LIST_VALUES && this.hasNoListChangeListeners(ListValueModel.LIST_VALUES)) { - this.disengageModel(); - } - } - - - // ********** behavior ********** - - /** - * Start listening to the list holder. - */ - protected void engageModel() { - this.listHolder.addListChangeListener(ListValueModel.LIST_VALUES, this.listChangeListener); - } - - /** - * Stop listening to the list holder. - */ - protected void disengageModel() { - this.listHolder.removeListChangeListener(ListValueModel.LIST_VALUES, this.listChangeListener); - } - - @Override - public void toString(StringBuilder sb) { - sb.append(this.listHolder); - } - - // minimize suppressed warnings - @SuppressWarnings("unchecked") - protected ListIterator<E> items(ListChangeEvent event) { - return (ListIterator<E>) event.items(); - } - - // minimize suppressed warnings - @SuppressWarnings("unchecked") - protected ListIterator<E> replacedItems(ListChangeEvent event) { - return (ListIterator<E>) event.replacedItems(); - } - - - // ********** list change support ********** - - /** - * Items were added to the wrapped list holder; - * propagate the change notification appropriately. - */ - protected abstract void itemsAdded(ListChangeEvent event); - - /** - * Items were removed from the wrapped list holder; - * propagate the change notification appropriately. - */ - protected abstract void itemsRemoved(ListChangeEvent event); - - /** - * Items were replaced in the wrapped list holder; - * propagate the change notification appropriately. - */ - protected abstract void itemsReplaced(ListChangeEvent event); - - /** - * Items were moved in the wrapped list holder; - * propagate the change notification appropriately. - */ - protected abstract void itemsMoved(ListChangeEvent event); - - /** - * The wrapped list holder was cleared; - * propagate the change notification appropriately. - */ - protected abstract void listCleared(ListChangeEvent event); - - /** - * The value of the wrapped list holder has changed; - * propagate the change notification appropriately. - */ - protected abstract void listChanged(ListChangeEvent event); - -} |