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Groovy example source code file (ValueHolder.java)
The Groovy ValueHolder.java source code/* * Copyright 2003-2007 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package groovy.model; import java.beans.PropertyChangeListener; import java.beans.PropertyChangeSupport; /** * A simple ValueModel implementation which is a holder of an object value. * Used to share local variables with closures * * @author <a href="mailto:james@coredevelopers.net">James Strachan * @version $Revision: 7922 $ */ public class ValueHolder implements ValueModel { private Object value; private final Class type; private PropertyChangeSupport propertyChangeSupport; private boolean editable = true; public ValueHolder() { this(Object.class); } public ValueHolder(Class type) { this.type = type; } public ValueHolder(Object value) { this.value = value; this.type = (value != null) ? value.getClass() : Object.class; } /** * Add a PropertyChangeListener to the listener list. * @param listener The listener to add. */ public void addPropertyChangeListener(PropertyChangeListener listener) { if ( propertyChangeSupport == null ) { propertyChangeSupport = new PropertyChangeSupport(this); } propertyChangeSupport.addPropertyChangeListener(listener); } /** * Removes a PropertyChangeListener from the listener list. * @param listener The listener to remove. */ public void removePropertyChangeListener(PropertyChangeListener listener) { if ( propertyChangeSupport != null ) { propertyChangeSupport.removePropertyChangeListener(listener); } } public Object getValue() { return value; } public void setValue(Object value) { Object oldValue = this.value; this.value = value; if ( propertyChangeSupport != null ) { propertyChangeSupport.firePropertyChange("value", oldValue, value); } } public Class getType() { return type; } public boolean isEditable() { return editable; } public void setEditable(boolean editable) { this.editable = editable; } } Other Groovy examples (source code examples)Here is a short list of links related to this Groovy ValueHolder.java source code file: |
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