| /******************************************************************************* |
| * Copyright (c) 2008, 2009 Matthew Hall 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: |
| * Matthew Hall - initial API and implementation (bug 194734) |
| * Matthew Hall - bugs 195222, 264307, 265064, 265561 |
| ******************************************************************************/ |
| |
| package org.eclipse.core.internal.databinding.beans; |
| |
| import java.beans.PropertyDescriptor; |
| import java.lang.reflect.Array; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.eclipse.core.databinding.observable.Diffs; |
| import org.eclipse.core.databinding.observable.IDiff; |
| import org.eclipse.core.databinding.observable.set.SetDiff; |
| import org.eclipse.core.databinding.property.INativePropertyListener; |
| import org.eclipse.core.databinding.property.ISimplePropertyListener; |
| import org.eclipse.core.databinding.property.set.SimpleSetProperty; |
| |
| /** |
| * @since 3.3 |
| * |
| */ |
| public class BeanSetProperty extends SimpleSetProperty { |
| private final PropertyDescriptor propertyDescriptor; |
| private final Class elementType; |
| |
| /** |
| * @param propertyDescriptor |
| * @param elementType |
| */ |
| public BeanSetProperty(PropertyDescriptor propertyDescriptor, |
| Class elementType) { |
| this.propertyDescriptor = propertyDescriptor; |
| this.elementType = elementType == null ? BeanPropertyHelper |
| .getCollectionPropertyElementType(propertyDescriptor) |
| : elementType; |
| } |
| |
| public Object getElementType() { |
| return elementType; |
| } |
| |
| protected Set doGetSet(Object source) { |
| return asSet(BeanPropertyHelper |
| .readProperty(source, propertyDescriptor)); |
| } |
| |
| private Set asSet(Object propertyValue) { |
| if (propertyValue == null) |
| return Collections.EMPTY_SET; |
| if (propertyDescriptor.getPropertyType().isArray()) |
| return new HashSet(Arrays.asList((Object[]) propertyValue)); |
| return (Set) propertyValue; |
| } |
| |
| protected void doSetSet(Object source, Set set, SetDiff diff) { |
| BeanPropertyHelper.writeProperty(source, propertyDescriptor, |
| convertSetToBeanPropertyType(set)); |
| } |
| |
| private Object convertSetToBeanPropertyType(Set set) { |
| Object propertyValue = set; |
| if (propertyDescriptor.getPropertyType().isArray()) { |
| Class componentType = propertyDescriptor.getPropertyType() |
| .getComponentType(); |
| Object[] array = (Object[]) Array.newInstance(componentType, set |
| .size()); |
| propertyValue = set.toArray(array); |
| } |
| return propertyValue; |
| } |
| |
| public INativePropertyListener adaptListener( |
| final ISimplePropertyListener listener) { |
| return new BeanPropertyListener(this, propertyDescriptor, listener) { |
| protected IDiff computeDiff(Object oldValue, Object newValue) { |
| return Diffs.computeSetDiff(asSet(oldValue), asSet(newValue)); |
| } |
| }; |
| } |
| |
| public String toString() { |
| String s = BeanPropertyHelper.propertyName(propertyDescriptor) + "{}"; //$NON-NLS-1$ |
| if (elementType != null) |
| s += "<" + BeanPropertyHelper.shortClassName(elementType) + ">"; //$NON-NLS-1$//$NON-NLS-2$ |
| return s; |
| } |
| } |