| /******************************************************************************* |
| * 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 - bug 195222, 264307, 265561 |
| ******************************************************************************/ |
| |
| package org.eclipse.core.internal.databinding.beans; |
| |
| import java.beans.PropertyDescriptor; |
| |
| import org.eclipse.core.databinding.observable.Diffs; |
| import org.eclipse.core.databinding.observable.value.ValueDiff; |
| import org.eclipse.core.databinding.property.INativePropertyListener; |
| import org.eclipse.core.databinding.property.ISimplePropertyListener; |
| import org.eclipse.core.databinding.property.value.SimpleValueProperty; |
| |
| /** |
| * @param <S> |
| * @param <T> |
| * @since 3.3 |
| * |
| */ |
| public class BeanValueProperty<S, T> extends SimpleValueProperty<S, T> { |
| private final PropertyDescriptor propertyDescriptor; |
| private final Class<T> valueType; |
| |
| /** |
| * @param propertyDescriptor |
| * @param valueType |
| */ |
| public BeanValueProperty(PropertyDescriptor propertyDescriptor, |
| Class<T> valueType) { |
| if (valueType == null) { |
| throw new IllegalArgumentException("valueType cannot be null."); //$NON-NLS-1$ |
| } |
| Class<?> propertyType = propertyDescriptor.getPropertyType(); |
| propertyType = Util.convertToObjectClass(propertyType); |
| if (valueType != propertyType) { |
| throw new IllegalArgumentException( |
| "valueType does not match the actual property type."); //$NON-NLS-1$ |
| } |
| this.propertyDescriptor = propertyDescriptor; |
| this.valueType = valueType; |
| } |
| |
| public Class<T> getValueType() { |
| return valueType; |
| } |
| |
| public Class<T> getValueClass() { |
| return valueType; |
| } |
| |
| protected T doGetValue(S source) { |
| Object value = BeanPropertyHelper.readProperty(source, |
| propertyDescriptor); |
| return valueType.cast(value); |
| } |
| |
| protected void doSetValue(S source, T value) { |
| BeanPropertyHelper.writeProperty(source, propertyDescriptor, value); |
| } |
| |
| public INativePropertyListener<S> adaptListener( |
| final ISimplePropertyListener<ValueDiff<T>> listener) { |
| return new BeanPropertyListener<S, ValueDiff<T>>(this, |
| propertyDescriptor, listener) { |
| protected ValueDiff<T> computeDiff(Object oldValue, Object newValue) { |
| return Diffs.createValueDiff(valueType.cast(oldValue), |
| valueType.cast(newValue)); |
| } |
| }; |
| } |
| |
| public String toString() { |
| String s = BeanPropertyHelper.propertyName(propertyDescriptor); |
| if (valueType != null) |
| s += "<" + BeanPropertyHelper.shortClassName(valueType) + ">"; //$NON-NLS-1$//$NON-NLS-2$ |
| return s; |
| } |
| } |