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Diffstat (limited to 'common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/PropertyCollectionValueModelAdapter.java')
-rw-r--r--common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/PropertyCollectionValueModelAdapter.java141
1 files changed, 0 insertions, 141 deletions
diff --git a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/PropertyCollectionValueModelAdapter.java b/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/PropertyCollectionValueModelAdapter.java
deleted file mode 100644
index 1d432aeda5..0000000000
--- a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/PropertyCollectionValueModelAdapter.java
+++ /dev/null
@@ -1,141 +0,0 @@
-/*******************************************************************************
- * Copyright (c) 2007, 2009 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.Collections;
-import java.util.Iterator;
-
-import org.eclipse.jpt.common.utility.internal.StringTools;
-import org.eclipse.jpt.common.utility.internal.iterators.EmptyIterator;
-import org.eclipse.jpt.common.utility.internal.iterators.SingleElementIterator;
-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;
-
-/**
- * An adapter that allows us to make a {@link PropertyValueModel} behave like
- * a read-only, single-element {@link CollectionValueModel}, sorta.
- * <p>
- * If the property's value is null, an empty iterator is returned
- * (i.e. you can't have a collection with a <code>null</code> element).
- */
-public class PropertyCollectionValueModelAdapter<E>
- extends AbstractCollectionValueModel
- implements CollectionValueModel<E>
-{
- /** The wrapped property value model. */
- protected final PropertyValueModel<? extends E> valueHolder;
-
- /** A listener that forwards any events fired by the value holder. */
- protected final PropertyChangeListener propertyChangeListener;
-
- /** Cache the value. */
- protected E value;
-
-
- // ********** constructors/initialization **********
-
- /**
- * Convert the specified property value model to a collection
- * value model.
- */
- public PropertyCollectionValueModelAdapter(PropertyValueModel<? extends E> valueHolder) {
- super();
- if (valueHolder == null) {
- throw new NullPointerException();
- }
- this.valueHolder = valueHolder;
- this.propertyChangeListener = this.buildPropertyChangeListener();
- this.value = null;
- // postpone building the value and listening to the underlying value
- // until we have listeners ourselves...
- }
-
- /**
- * The wrapped value has changed, forward an equivalent
- * collection change event to our listeners.
- */
- protected PropertyChangeListener buildPropertyChangeListener() {
- return new PropertyChangeListener() {
- public void propertyChanged(PropertyChangeEvent event) {
- @SuppressWarnings("unchecked")
- E eventNewValue = (E) event.getNewValue();
- PropertyCollectionValueModelAdapter.this.valueChanged(eventNewValue);
- }
- @Override
- public String toString() {
- return "property change listener"; //$NON-NLS-1$
- }
- };
- }
-
-
- // ********** CollectionValueModel implementation **********
-
- public Iterator<E> iterator() {
- return (this.value == null) ? EmptyIterator.<E>instance() : this.iterator_();
- }
-
- protected Iterator<E> iterator_() {
- return new SingleElementIterator<E>(this.value);
- }
-
- public int size() {
- return (this.value == null) ? 0 : 1;
- }
-
-
- // ********** AbstractCollectionValueModel implementation **********
-
- @Override
- protected void engageModel() {
- this.valueHolder.addPropertyChangeListener(PropertyValueModel.VALUE, this.propertyChangeListener);
- // synch our value *after* we start listening to the value holder,
- // since its value might change when a listener is added
- this.value = this.valueHolder.getValue();
- }
-
- @Override
- protected void disengageModel() {
- this.valueHolder.removePropertyChangeListener(PropertyValueModel.VALUE, this.propertyChangeListener);
- // clear out the value when we are not listening to the value holder
- this.value = null;
- }
-
-
- // ********** behavior **********
-
- /**
- * synchronize our internal value with the wrapped value
- * and fire the appropriate events
- */
- protected void valueChanged(E newValue) {
- E oldValue = this.value;
- this.value = newValue;
- if (oldValue == null) {
- // we wouldn't get the event if the new value were null too
- this.fireItemAdded(VALUES, newValue);
- } else {
- if (newValue == null) {
- this.fireItemRemoved(VALUES, oldValue);
- } else {
- // we wouldn't get the event if the new value was the same as the old
- this.fireCollectionChanged(VALUES, Collections.singleton(newValue));
- }
- }
- }
-
- @Override
- public void toString(StringBuilder sb) {
- StringTools.append(sb, this);
- }
-
-}

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