| /******************************************************************************* |
| * Copyright (c) 2006, 2007 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 |
| * Brad Reynolds - bug 171616 |
| *******************************************************************************/ |
| |
| package org.eclipse.core.internal.databinding.internal.beans; |
| |
| import java.beans.PropertyChangeListener; |
| import java.beans.PropertyDescriptor; |
| import java.lang.reflect.Array; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.core.databinding.BindingException; |
| import org.eclipse.core.databinding.beans.IBeanObservable; |
| import org.eclipse.core.databinding.observable.Diffs; |
| import org.eclipse.core.databinding.observable.Realm; |
| import org.eclipse.core.databinding.observable.list.ListDiffEntry; |
| import org.eclipse.core.databinding.observable.list.ObservableList; |
| |
| /** |
| * @since 1.0 |
| * |
| */ |
| public class JavaBeanObservableList extends ObservableList implements |
| IBeanObservable { |
| |
| private final Object object; |
| |
| private PropertyChangeListener collectionListener = new PropertyChangeListener() { |
| public void propertyChange(java.beans.PropertyChangeEvent event) { |
| if (!updating) { |
| updateWrappedList(Arrays.asList(getValues())); |
| } |
| } |
| }; |
| |
| private boolean updating = false; |
| |
| private PropertyDescriptor descriptor; |
| |
| private ListenerSupport collectionListenSupport; |
| |
| /** |
| * @param realm |
| * @param object |
| * @param descriptor |
| * @param elementType |
| */ |
| public JavaBeanObservableList(Realm realm, Object object, |
| PropertyDescriptor descriptor, Class elementType) { |
| super(realm, new ArrayList(), elementType); |
| this.object = object; |
| this.descriptor = descriptor; |
| this.collectionListenSupport = new ListenerSupport(collectionListener, |
| descriptor.getName()); |
| |
| // initialize list without firing events |
| wrappedList.addAll(Arrays.asList(getValues())); |
| } |
| |
| protected void firstListenerAdded() { |
| collectionListenSupport.hookListener(this.object); |
| } |
| |
| protected void lastListenerRemoved() { |
| if (collectionListenSupport != null) { |
| collectionListenSupport.dispose(); |
| } |
| } |
| |
| public void dispose() { |
| super.dispose(); |
| lastListenerRemoved(); |
| } |
| |
| private Object primGetValues() { |
| Exception ex = null; |
| try { |
| Method readMethod = descriptor.getReadMethod(); |
| if (!readMethod.isAccessible()) { |
| readMethod.setAccessible(true); |
| } |
| return readMethod.invoke(object, new Object[0]); |
| } catch (IllegalArgumentException e) { |
| ex = e; |
| } catch (IllegalAccessException e) { |
| ex = e; |
| } catch (InvocationTargetException e) { |
| ex = e; |
| } |
| throw new BindingException("Could not read collection values", ex); //$NON-NLS-1$ |
| } |
| |
| private Object[] getValues() { |
| Object[] values = null; |
| |
| Object result = primGetValues(); |
| if (descriptor.getPropertyType().isArray()) |
| values = (Object[]) result; |
| else { |
| // TODO add jUnit for POJO (var. SettableValue) collections |
| Collection list = (Collection) result; |
| if (list != null) { |
| values = list.toArray(); |
| } else { |
| values = new Object[] {}; |
| } |
| } |
| return values; |
| } |
| |
| public Object getObserved() { |
| return object; |
| } |
| |
| public PropertyDescriptor getPropertyDescriptor() { |
| return descriptor; |
| } |
| |
| private void setValues() { |
| if (descriptor.getPropertyType().isArray()) { |
| Class componentType = descriptor.getPropertyType() |
| .getComponentType(); |
| Object[] newArray = (Object[]) Array.newInstance(componentType, |
| wrappedList.size()); |
| wrappedList.toArray(newArray); |
| primSetValues(newArray); |
| } else { |
| // assume that it is a java.util.List |
| primSetValues(new ArrayList(wrappedList)); |
| } |
| } |
| |
| private void primSetValues(Object newValue) { |
| Exception ex = null; |
| try { |
| Method writeMethod = descriptor.getWriteMethod(); |
| if (!writeMethod.isAccessible()) { |
| writeMethod.setAccessible(true); |
| } |
| writeMethod.invoke(object, new Object[] { newValue }); |
| return; |
| } catch (IllegalArgumentException e) { |
| ex = e; |
| } catch (IllegalAccessException e) { |
| ex = e; |
| } catch (InvocationTargetException e) { |
| ex = e; |
| } |
| throw new BindingException("Could not write collection values", ex); //$NON-NLS-1$ |
| } |
| |
| public Object set(int index, Object element) { |
| getterCalled(); |
| updating = true; |
| try { |
| Object oldElement = wrappedList.set(index, element); |
| setValues(); |
| fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry( |
| index, true, element), Diffs.createListDiffEntry(index + 1, |
| false, oldElement))); |
| return oldElement; |
| } finally { |
| updating = false; |
| } |
| } |
| |
| public Object remove(int index) { |
| getterCalled(); |
| updating = true; |
| try { |
| Object oldElement = wrappedList.remove(index); |
| setValues(); |
| fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry( |
| index, false, oldElement))); |
| return oldElement; |
| } finally { |
| updating = false; |
| } |
| } |
| |
| public boolean add(Object element) { |
| updating = true; |
| try { |
| int index = wrappedList.size(); |
| boolean result = wrappedList.add(element); |
| setValues(); |
| fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry( |
| index, true, element))); |
| return result; |
| } finally { |
| updating = false; |
| } |
| } |
| |
| public void add(int index, Object element) { |
| updating = true; |
| try { |
| wrappedList.add(index, element); |
| setValues(); |
| fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry( |
| index, true, element))); |
| } finally { |
| updating = false; |
| } |
| } |
| |
| public boolean addAll(Collection c) { |
| if (c.isEmpty()) { |
| return false; |
| } |
| updating = true; |
| try { |
| int index = wrappedList.size(); |
| boolean result = wrappedList.addAll(c); |
| setValues(); |
| ListDiffEntry[] entries = new ListDiffEntry[c.size()]; |
| int i = 0; |
| for (Iterator it = c.iterator(); it.hasNext();) { |
| Object o = it.next(); |
| entries[i++] = Diffs.createListDiffEntry(index++, true, o); |
| } |
| fireListChange(Diffs.createListDiff(entries)); |
| return result; |
| } finally { |
| updating = false; |
| } |
| } |
| |
| public boolean addAll(int index, Collection c) { |
| if (c.isEmpty()) { |
| return false; |
| } |
| updating = true; |
| try { |
| boolean result = wrappedList.addAll(index, c); |
| setValues(); |
| ListDiffEntry[] entries = new ListDiffEntry[c.size()]; |
| int i = 0; |
| for (Iterator it = c.iterator(); it.hasNext();) { |
| Object o = it.next(); |
| entries[i++] = Diffs.createListDiffEntry(index++, true, o); |
| } |
| fireListChange(Diffs.createListDiff(entries)); |
| return result; |
| } finally { |
| updating = false; |
| } |
| } |
| |
| public boolean remove(Object o) { |
| getterCalled(); |
| int index = wrappedList.indexOf(o); |
| if (index == -1) { |
| return false; |
| } |
| updating = true; |
| try { |
| Object oldElement = wrappedList.remove(index); |
| setValues(); |
| fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry( |
| index, false, oldElement))); |
| return true; |
| } finally { |
| updating = false; |
| } |
| } |
| |
| public boolean removeAll(Collection c) { |
| getterCalled(); |
| boolean changed = false; |
| updating = true; |
| try { |
| List diffEntries = new ArrayList(); |
| for (Iterator it = c.iterator(); it.hasNext();) { |
| Object o = it.next(); |
| int index = wrappedList.indexOf(o); |
| if (index != -1) { |
| changed = true; |
| Object oldElement = wrappedList.remove(index); |
| diffEntries.add(Diffs.createListDiffEntry(index, false, |
| oldElement)); |
| } |
| } |
| setValues(); |
| fireListChange(Diffs.createListDiff((ListDiffEntry[]) diffEntries |
| .toArray(new ListDiffEntry[diffEntries.size()]))); |
| return changed; |
| } finally { |
| updating = false; |
| } |
| } |
| |
| public boolean retainAll(Collection c) { |
| getterCalled(); |
| boolean changed = false; |
| updating = true; |
| try { |
| List diffEntries = new ArrayList(); |
| int index = 0; |
| for (Iterator it = wrappedList.iterator(); it.hasNext();) { |
| Object o = it.next(); |
| boolean retain = c.contains(o); |
| if (retain) { |
| index++; |
| } else { |
| changed = true; |
| it.remove(); |
| diffEntries.add(Diffs.createListDiffEntry(index, false, o)); |
| } |
| } |
| setValues(); |
| fireListChange(Diffs.createListDiff((ListDiffEntry[]) diffEntries |
| .toArray(new ListDiffEntry[diffEntries.size()]))); |
| return changed; |
| } finally { |
| updating = false; |
| } |
| } |
| |
| public void clear() { |
| updating = true; |
| try { |
| List diffEntries = new ArrayList(); |
| for (Iterator it = wrappedList.iterator(); it.hasNext();) { |
| Object o = it.next(); |
| diffEntries.add(Diffs.createListDiffEntry(0, false, o)); |
| } |
| setValues(); |
| fireListChange(Diffs.createListDiff((ListDiffEntry[]) diffEntries |
| .toArray(new ListDiffEntry[diffEntries.size()]))); |
| } finally { |
| updating = false; |
| } |
| } |
| |
| } |