| /******************************************************************************* |
| * 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 247997) |
| * Matthew Hall - bugs 264307, 264619 |
| ******************************************************************************/ |
| |
| package org.eclipse.core.internal.databinding.beans; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.eclipse.core.databinding.beans.PojoProperties; |
| import org.eclipse.core.databinding.observable.masterdetail.MasterDetailObservables; |
| import org.eclipse.core.databinding.observable.value.IObservableValue; |
| import org.eclipse.core.databinding.property.value.DelegatingValueProperty; |
| import org.eclipse.core.databinding.property.value.IValueProperty; |
| |
| /** |
| * @param <S> |
| * @param <T> |
| * @since 3.3 |
| * |
| */ |
| public class AnonymousPojoValueProperty<S, T> extends |
| DelegatingValueProperty<S, T> { |
| private final String propertyName; |
| |
| private Map<Class<? extends S>, IValueProperty<S, T>> delegates; |
| |
| /** |
| * @param propertyName |
| * @param valueType |
| */ |
| public AnonymousPojoValueProperty(String propertyName, Class<T> valueType) { |
| super(valueType); |
| this.propertyName = propertyName; |
| this.delegates = new HashMap<Class<? extends S>, IValueProperty<S, T>>(); |
| } |
| |
| protected IValueProperty<S, T> doGetDelegate(S source) { |
| Class<? extends S> beanClass = Util.getClass(source); |
| return getClassDelegate(beanClass); |
| } |
| |
| private IValueProperty<S, T> getClassDelegate(Class<? extends S> pojoClass) { |
| if (delegates.containsKey(pojoClass)) |
| return delegates.get(pojoClass); |
| |
| IValueProperty<S, T> delegate; |
| try { |
| delegate = PojoProperties.<S, T> value(pojoClass, propertyName, |
| getValueClass()); |
| } catch (IllegalArgumentException noSuchProperty) { |
| delegate = null; |
| } |
| delegates.put(pojoClass, delegate); |
| return delegate; |
| } |
| |
| public <M extends S> IObservableValue<T> observeDetail( |
| IObservableValue<M> master) { |
| Object valueType = getValueType(); |
| if (valueType == null) |
| valueType = inferValueType(master.getValueType()); |
| return MasterDetailObservables.detailValue(master, |
| valueFactory(master.getRealm()), valueType); |
| } |
| |
| private Object inferValueType(Object masterObservableValueType) { |
| if (masterObservableValueType instanceof Class) { |
| return getClassDelegate((Class) masterObservableValueType) |
| .getValueClass(); |
| } |
| return null; |
| } |
| |
| public String toString() { |
| String s = "?." + propertyName; //$NON-NLS-1$ |
| Class<T> valueType = getValueClass(); |
| if (valueType != null) |
| s += "<" + BeanPropertyHelper.shortClassName(valueType) + ">"; //$NON-NLS-1$//$NON-NLS-2$ |
| return s; |
| } |
| } |