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Groovy: A powerful, dynamic language for the JVM
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.codehaus.groovy.binding;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;
import java.util.Set;
import java.util.HashSet;
/**
* A property path full binding
*/
public class PropertyPathFullBinding extends AbstractFullBinding implements PropertyChangeListener {
/**
* The set of all objects where a property change does incur a listener-re-check
*/
Set updateObjects = new HashSet();
/**
* The root set of bind paths we are initested in
*/
BindPath[] bindPaths;
/**
* If we think we are currently bound
*/
boolean bound;
public void bind() {
updateObjects.clear();
for (BindPath bp : bindPaths) {
bp.addAllListeners(this, bp.currentObject, updateObjects);
}
bound = true;
}
public void unbind() {
updateObjects.clear();
for (BindPath path : bindPaths) {
// we can't just remove from the update set,
// because we may be local or global, the path knows
path.removeListeners();
}
bound = false;
}
public void rebind() {
if (bound) bind();
}
public void propertyChange(PropertyChangeEvent evt) {
if (updateObjects.contains(evt.getSource())) {
for (BindPath bp : bindPaths) {
Set newUpdates = new HashSet();
bp.updatePath(this, bp.currentObject, newUpdates);
updateObjects = newUpdates;
}
}
update();
}
}