| /******************************************************************************* |
| * Copyright (c) 2005 IBM Corporation and others. |
| * 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jface.examples.databinding.model; |
| |
| import java.util.StringTokenizer; |
| |
| import org.eclipse.jface.databinding.ChangeEvent; |
| import org.eclipse.jface.databinding.IChangeListener; |
| import org.eclipse.jface.databinding.IUpdatableValue; |
| import org.eclipse.jface.databinding.UpdatableValue; |
| |
| public class AggregateUpdatableValue extends UpdatableValue { |
| |
| private IUpdatableValue[] updatableValues; |
| |
| private String delimiter; |
| |
| private boolean updating = false; |
| |
| private IChangeListener listener = new IChangeListener() { |
| public void handleChange(ChangeEvent changeEvent) { |
| if (!updating) |
| fireChangeEvent(ChangeEvent.CHANGE, null, null); |
| } |
| }; |
| |
| public AggregateUpdatableValue(IUpdatableValue[] updatableValues, |
| String delimiter) { |
| this.updatableValues = updatableValues; |
| this.delimiter = delimiter; |
| for (int i = 0; i < updatableValues.length; i++) { |
| updatableValues[i].addChangeListener(listener); |
| } |
| } |
| |
| public void setValue(Object value) { |
| Object oldValue = getValue(); |
| StringTokenizer tokenizer = new StringTokenizer((String) value, |
| delimiter); |
| try { |
| updating=true; |
| for (int i = 0; i < updatableValues.length; i++) { |
| if (tokenizer.hasMoreElements()) { |
| updatableValues[i].setValue(tokenizer.nextElement()); |
| } |
| else { |
| updatableValues[i].setValue(null); |
| } |
| } |
| } finally { |
| updating = false; |
| } |
| fireChangeEvent(ChangeEvent.CHANGE, oldValue, getValue()); |
| } |
| |
| public Object getValue() { |
| StringBuffer result = new StringBuffer(); |
| for (int i = 0; i < updatableValues.length; i++) { |
| if (i > 0 & i < updatableValues.length) { |
| result.append(delimiter); |
| } |
| result.append(updatableValues[i].getValue()); |
| } |
| return result.toString(); |
| } |
| |
| public Class getValueType() { |
| return String.class; |
| } |
| |
| public void dispose() { |
| for (int i = 0; i < updatableValues.length; i++) { |
| updatableValues[i].removeChangeListener(listener); |
| } |
| super.dispose(); |
| } |
| |
| } |