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Diffstat (limited to 'common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/DoublePropertyValueModel.java')
-rw-r--r-- | common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/DoublePropertyValueModel.java | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/DoublePropertyValueModel.java b/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/DoublePropertyValueModel.java deleted file mode 100644 index d8452cb924..0000000000 --- a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/DoublePropertyValueModel.java +++ /dev/null @@ -1,165 +0,0 @@ -/******************************************************************************* - * Copyright (c) 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 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.PropertyValueModel; - -/** - * This property value model <em>wrapper</em> wraps another property value model - * and treats the <em>wrapped</em> model's value as the <em>wrapper</em>'s value. - * Any change events fired by the <em>wrapped</em> model are simply forwarded by - * the <em>wrapper</em> as its own. - * Similarly, changing the <em>wrapper</em>'s <em>wrapped</em> model can also - * trigger a change event - * (see {@link #wrappedValueChanged(PropertyValueModel, PropertyValueModel)}). - * That is, the <em>wrapped</em> model is held by yet another property value - * model! - * <p> - * <ul> - * <li>Double (<em>wrapper</em>) property value model - a client can listen to - * this model and receive the same change notification whether the - * <em>wrapped</em> model or the <em>wrapped</em> model's value changes; - * much like an {@link PropertyAspectAdapter aspect adapter} whose subject - * model is <em>not</em> another property value model - * <ul> - * <li><em>Wrapped</em> property value model - this model is built and - * maintained by the server that also builds the <em>wrapper</em> model - * (i.e. the server will monitor some other model that determines when - * the <em>wrapped</em> model is changed) - * <ul> - * <li>Original property value model - this model is the "original" - * model that contains the value of interest - * </ul> - * </ul> - * </ul> - * <p> - * This wrapper is useful when a change in the <em>wrapped</em> model is - * signaled by a non-value event and a third-party would like to change it. - * - * @param <V> the type of the both the <em>wrapped</em> and <em>wrapper</em> - * models' values - */ -public class DoublePropertyValueModel<V> - extends PropertyValueModelWrapper<PropertyValueModel<? extends V>> - implements PropertyValueModel<V> -{ - /** - * The optionally present wrapped value model value; held by - * {@link #valueModel}. This may be <code>null</code>. - */ - protected volatile PropertyValueModel<? extends V> valueModelValueModel; - - /** - * A listener that allows us to sync with changes to the wrapped value - * model model. - */ - protected final PropertyChangeListener valueModelValueListener; - - - // ********** constructors/initialization ********** - - /** - * Construct a double property value model for the specified - * wrapped property value model model. - */ - public DoublePropertyValueModel(PropertyValueModel<? extends PropertyValueModel<? extends V>> valueModel) { - super(valueModel); - this.valueModelValueListener = this.buildValueModelValueListener(); - } - - protected PropertyChangeListener buildValueModelValueListener() { - return new ValueModelListener(); - } - - /* CU private */ class ValueModelListener - extends PropertyChangeAdapter - { - @Override - public void propertyChanged(PropertyChangeEvent event) { - DoublePropertyValueModel.this.wrappedValueModelValueChanged(event); - } - } - - - // ********** PropertyValueModel implementation ********** - - public V getValue() { - return (this.valueModelValueModel == null) ? null : this.valueModelValueModel.getValue(); - } - - @Override - public void toString(StringBuilder sb) { - sb.append(this.getValue()); - } - - - // ********** wrapped value model ********** - - /** - * The value model has changed. - * Move our value model listener and - * notify listeners that the value has changed. - */ - @Override - protected void wrappedValueChanged(PropertyValueModel<? extends V> oldValue, PropertyValueModel<? extends V> newValue) { - if (this.hasListeners()) { - V old = this.getValue(); - this.disengageValueModel(); - this.engageValueModel(); - this.firePropertyChanged(VALUE, old, this.getValue()); - } - } - - - // ********** wrapped value model value ********** - - /** - * The value of the wrapped value model's value model has changed. - * Forward the event as our own. - */ - protected void wrappedValueModelValueChanged(PropertyChangeEvent event) { - this.firePropertyChanged(event.clone(this)); - } - - /** - * Begin listening to the value model. - */ - @Override - protected void engageModel() { - super.engageModel(); - this.engageValueModel(); - } - - protected void engageValueModel() { - this.valueModelValueModel = this.valueModel.getValue(); - if (this.valueModelValueModel != null) { - this.valueModelValueModel.addPropertyChangeListener(VALUE, this.valueModelValueListener); - } - } - - /** - * Stop listening to the value model. - */ - @Override - protected void disengageModel() { - this.disengageValueModel(); - super.disengageModel(); - } - - protected void disengageValueModel() { - if (this.valueModelValueModel != null) { - this.valueModelValueModel.removePropertyChangeListener(VALUE, this.valueModelValueListener); - } - this.valueModelValueModel = null; - } -} |