diff options
Diffstat (limited to 'jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/TreeAspectAdapter.java')
-rw-r--r-- | jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/TreeAspectAdapter.java | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/TreeAspectAdapter.java b/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/TreeAspectAdapter.java deleted file mode 100644 index 739bb97012..0000000000 --- a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/TreeAspectAdapter.java +++ /dev/null @@ -1,215 +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.iterators.EmptyIterator; -import org.eclipse.jpt.utility.model.Model; -import org.eclipse.jpt.utility.model.event.TreeChangeEvent; -import org.eclipse.jpt.utility.model.listener.ChangeListener; -import org.eclipse.jpt.utility.model.listener.TreeChangeListener; -import org.eclipse.jpt.utility.model.value.PropertyValueModel; -import org.eclipse.jpt.utility.model.value.TreeValueModel; - -/** - * This extension of PropertyAdapter provides TreeChange support. - * This allows us to convert a set of one or more trees into - * a single tree, NODES. - * - * The typical subclass will override the following methods: - * #nodes_() - * at the very minimum, override this method to return an iterator - * on the subject's tree aspect; it does not need to be overridden if - * #nodes() is overridden and its behavior changed - * #nodes() - * override this method only if returning an empty iterator when the - * subject is null is unacceptable - */ -public abstract class TreeAspectAdapter<S extends Model, E> - extends AspectAdapter<S> - implements TreeValueModel<E> -{ - /** - * The name of the subject's trees that we use for the value. - */ - protected final String[] treeNames; - protected static final String[] EMPTY_TREE_NAMES = new String[0]; - - /** A listener that listens to the subject's tree aspect. */ - protected final TreeChangeListener treeChangeListener; - - - // ********** constructors ********** - - /** - * Construct a TreeAspectAdapter for the specified subject - * and tree. - */ - protected TreeAspectAdapter(String treeName, S subject) { - this(new String[] {treeName}, subject); - } - - /** - * Construct a TreeAspectAdapter for the specified subject - * and trees. - */ - protected TreeAspectAdapter(String[] treeNames, S subject) { - this(new StaticPropertyValueModel<S>(subject), treeNames); - } - - /** - * Construct a TreeAspectAdapter for the specified subject holder - * and trees. - */ - protected TreeAspectAdapter(PropertyValueModel<? extends S> subjectHolder, String... treeNames) { - super(subjectHolder); - this.treeNames = treeNames; - this.treeChangeListener = this.buildTreeChangeListener(); - } - - /** - * Construct a TreeAspectAdapter for the specified subject holder - * and trees. - */ - protected TreeAspectAdapter(PropertyValueModel<? extends S> subjectHolder, Collection<String> treeNames) { - this(subjectHolder, treeNames.toArray(new String[treeNames.size()])); - } - - /** - * Construct a TreeAspectAdapter for an "unchanging" tree in - * the specified subject. This is useful for a tree aspect that does not - * change for a particular subject; but the subject will change, resulting in - * a new tree. - */ - protected TreeAspectAdapter(PropertyValueModel<? extends S> subjectHolder) { - this(subjectHolder, EMPTY_TREE_NAMES); - } - - - // ********** initialization ********** - - /** - * The subject's tree aspect has changed, notify the listeners. - */ - protected TreeChangeListener buildTreeChangeListener() { - // transform the subject's tree change events into VALUE tree change events - return new TreeChangeListener() { - public void nodeAdded(TreeChangeEvent event) { - TreeAspectAdapter.this.nodeAdded(event); - } - public void nodeRemoved(TreeChangeEvent event) { - TreeAspectAdapter.this.nodeRemoved(event); - } - public void treeCleared(TreeChangeEvent event) { - TreeAspectAdapter.this.treeCleared(event); - } - public void treeChanged(TreeChangeEvent event) { - TreeAspectAdapter.this.treeChanged(event); - } - @Override - public String toString() { - return "tree change listener: " + Arrays.asList(TreeAspectAdapter.this.treeNames); - } - }; - } - - - // ********** TreeValueModel implementation ********** - - /** - * Return the nodes of the subject's tree aspect. - */ - public Iterator<E> nodes() { - return (this.subject == null) ? EmptyIterator.<E>instance() : this.nodes_(); - } - - /** - * Return the nodes of the subject's tree aspect. - * At this point we can be sure that the subject is not null. - * @see #nodes() - */ - protected Iterator<E> nodes_() { - throw new UnsupportedOperationException(); - } - - - // ********** AspectAdapter implementation ********** - - @Override - protected Object getValue() { - return this.nodes(); - } - - @Override - protected Class<? extends ChangeListener> getListenerClass() { - return TreeChangeListener.class; - } - - @Override - protected String getListenerAspectName() { - return NODES; - } - - @Override - protected boolean hasListeners() { - return this.hasAnyTreeChangeListeners(NODES); - } - - @Override - protected void fireAspectChange(Object oldValue, Object newValue) { - this.fireTreeChanged(NODES); - } - - @Override - protected void engageSubject_() { - for (String treeName : this.treeNames) { - ((Model) this.subject).addTreeChangeListener(treeName, this.treeChangeListener); - } - } - - @Override - protected void disengageSubject_() { - for (String treeName : this.treeNames) { - ((Model) this.subject).removeTreeChangeListener(treeName, this.treeChangeListener); - } - } - - @Override - public void toString(StringBuilder sb) { - for (int i = 0; i < this.treeNames.length; i++) { - if (i != 0) { - sb.append(", "); - } - sb.append(this.treeNames[i]); - } - } - - - // ********** behavior ********** - - protected void nodeAdded(TreeChangeEvent event) { - this.fireNodeAdded(NODES, event.getPath()); - } - - protected void nodeRemoved(TreeChangeEvent event) { - this.fireNodeRemoved(NODES, event.getPath()); - } - - protected void treeCleared(TreeChangeEvent event) { - this.fireTreeCleared(NODES); - } - - protected void treeChanged(TreeChangeEvent event) { - this.fireTreeChanged(NODES, event.getPath()); - } - -} |