| /******************************************************************************* |
| * Copyright (c) 2007, 2010 Oracle. 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: |
| * Oracle - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.jpt.utility.internal.model; |
| |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.jpt.utility.internal.StringTools; |
| import org.eclipse.jpt.utility.model.Model; |
| import org.eclipse.jpt.utility.model.event.CollectionAddEvent; |
| import org.eclipse.jpt.utility.model.event.CollectionChangeEvent; |
| import org.eclipse.jpt.utility.model.event.CollectionClearEvent; |
| import org.eclipse.jpt.utility.model.event.CollectionRemoveEvent; |
| import org.eclipse.jpt.utility.model.event.ListAddEvent; |
| import org.eclipse.jpt.utility.model.event.ListChangeEvent; |
| import org.eclipse.jpt.utility.model.event.ListClearEvent; |
| import org.eclipse.jpt.utility.model.event.ListMoveEvent; |
| import org.eclipse.jpt.utility.model.event.ListRemoveEvent; |
| import org.eclipse.jpt.utility.model.event.ListReplaceEvent; |
| import org.eclipse.jpt.utility.model.event.PropertyChangeEvent; |
| import org.eclipse.jpt.utility.model.event.StateChangeEvent; |
| import org.eclipse.jpt.utility.model.event.TreeAddEvent; |
| import org.eclipse.jpt.utility.model.event.TreeChangeEvent; |
| import org.eclipse.jpt.utility.model.event.TreeClearEvent; |
| import org.eclipse.jpt.utility.model.event.TreeRemoveEvent; |
| import org.eclipse.jpt.utility.model.listener.ChangeListener; |
| import org.eclipse.jpt.utility.model.listener.CollectionChangeListener; |
| import org.eclipse.jpt.utility.model.listener.ListChangeListener; |
| import org.eclipse.jpt.utility.model.listener.PropertyChangeListener; |
| import org.eclipse.jpt.utility.model.listener.StateChangeListener; |
| import org.eclipse.jpt.utility.model.listener.TreeChangeListener; |
| |
| /** |
| * Reasonable implementation of the {@link Model} protocol |
| * with numerous convenience methods. |
| * |
| * @see ChangeSupport |
| */ |
| public abstract class AbstractModel |
| implements Model |
| { |
| /** |
| * Delegate state/property/collection/list/tree change support to this |
| * helper object. The change support object is "lazily-initialized"; |
| * so it may be null. The method {@link #getChangeSupport()} will initialize this |
| * field if it is null. |
| * |
| * NB: We instantiate this when we fire events, even when we do not have |
| * any listeners (which is be implied if this is null). |
| * This allows the change support to have behavior tied to events even when |
| * we have no listeners. |
| * @see CallbackChangeSupport#aspectChanged(String) |
| */ |
| protected ChangeSupport changeSupport; |
| |
| |
| // ********** constructors/initialization ********** |
| |
| /** |
| * Default constructor. |
| */ |
| protected AbstractModel() { |
| super(); |
| } |
| |
| /** |
| * This accessor will build the change support when required. |
| * This only helps reduce the footprint of a model that neither has any |
| * listeners added to it nor ever changes (fires any events). |
| */ |
| protected synchronized ChangeSupport getChangeSupport() { |
| if (this.changeSupport == null) { |
| this.changeSupport = this.buildChangeSupport(); |
| } |
| return this.changeSupport; |
| } |
| |
| /** |
| * Allow subclasses to tweak the change support used. |
| */ |
| protected ChangeSupport buildChangeSupport() { |
| return new ChangeSupport(this); |
| } |
| |
| |
| // ********** change support ********** |
| |
| public void addChangeListener(ChangeListener listener) { |
| this.getChangeSupport().addChangeListener(listener); |
| } |
| |
| public void removeChangeListener(ChangeListener listener) { |
| this.getChangeSupport().removeChangeListener(listener); |
| } |
| |
| /** |
| * Return whether the model has any change listeners. |
| */ |
| public boolean hasAnyChangeListeners() { |
| return (this.changeSupport != null) && this.changeSupport.hasAnyChangeListeners(); |
| } |
| |
| /** |
| * Return whether the model has no change listeners. |
| */ |
| public boolean hasNoChangeListeners() { |
| return ! this.hasAnyChangeListeners(); |
| } |
| |
| |
| // ********** state change support ********** |
| |
| public void addStateChangeListener(StateChangeListener listener) { |
| this.getChangeSupport().addStateChangeListener(listener); |
| } |
| |
| public void removeStateChangeListener(StateChangeListener listener) { |
| this.getChangeSupport().removeStateChangeListener(listener); |
| } |
| |
| /** |
| * Return whether the model has any state change listeners. |
| */ |
| public boolean hasAnyStateChangeListeners() { |
| return (this.changeSupport != null) && this.changeSupport.hasAnyStateChangeListeners(); |
| } |
| |
| /** |
| * Return whether the model has no state change listeners. |
| */ |
| public boolean hasNoStateChangeListeners() { |
| return ! this.hasAnyStateChangeListeners(); |
| } |
| |
| protected final void fireStateChanged(StateChangeEvent event) { |
| this.getChangeSupport().fireStateChanged(event); |
| } |
| |
| protected final void fireStateChanged() { |
| this.getChangeSupport().fireStateChanged(); |
| } |
| |
| |
| // ********** property change support ********** |
| |
| public void addPropertyChangeListener(String propertyName, PropertyChangeListener listener) { |
| this.getChangeSupport().addPropertyChangeListener(propertyName, listener); |
| } |
| |
| public void removePropertyChangeListener(String propertyName, PropertyChangeListener listener) { |
| this.getChangeSupport().removePropertyChangeListener(propertyName, listener); |
| } |
| |
| /** |
| * Return whether the model has any property change listeners that will |
| * be notified when the specified property has changed. |
| */ |
| public boolean hasAnyPropertyChangeListeners(String propertyName) { |
| return (this.changeSupport != null) && this.changeSupport.hasAnyPropertyChangeListeners(propertyName); |
| } |
| |
| /** |
| * Return whether the model has no property change listeners that will |
| * be notified when the specified property has changed. |
| */ |
| public boolean hasNoPropertyChangeListeners(String propertyName) { |
| return ! this.hasAnyPropertyChangeListeners(propertyName); |
| } |
| |
| protected final void firePropertyChanged(PropertyChangeEvent event) { |
| this.getChangeSupport().firePropertyChanged(event); |
| } |
| |
| protected final void firePropertyChanged(String propertyName, Object oldValue, Object newValue) { |
| this.getChangeSupport().firePropertyChanged(propertyName, oldValue, newValue); |
| } |
| |
| protected final void firePropertyChanged(String propertyName, int oldValue, int newValue) { |
| this.getChangeSupport().firePropertyChanged(propertyName, oldValue, newValue); |
| } |
| |
| protected final void firePropertyChanged(String propertyName, boolean oldValue, boolean newValue) { |
| this.getChangeSupport().firePropertyChanged(propertyName, oldValue, newValue); |
| } |
| |
| /** |
| * implied <code>null</code> "old" value |
| */ |
| protected final void firePropertyChanged(String propertyName, Object newValue) { |
| this.firePropertyChanged(propertyName, null, newValue); |
| } |
| |
| |
| // ********** collection change support ********** |
| |
| public void addCollectionChangeListener(String collectionName, CollectionChangeListener listener) { |
| this.getChangeSupport().addCollectionChangeListener(collectionName, listener); |
| } |
| |
| public void removeCollectionChangeListener(String collectionName, CollectionChangeListener listener) { |
| this.getChangeSupport().removeCollectionChangeListener(collectionName, listener); |
| } |
| |
| /** |
| * Return whether the model has any collection change listeners that will |
| * be notified when the specified collection has changed. |
| */ |
| public boolean hasAnyCollectionChangeListeners(String collectionName) { |
| return (this.changeSupport != null) && this.changeSupport.hasAnyCollectionChangeListeners(collectionName); |
| } |
| |
| /** |
| * Return whether the model has no collection change listeners that will |
| * be notified when the specified collection has changed. |
| */ |
| public boolean hasNoCollectionChangeListeners(String collectionName) { |
| return ! this.hasAnyCollectionChangeListeners(collectionName); |
| } |
| |
| protected final void fireItemsAdded(CollectionAddEvent event) { |
| this.getChangeSupport().fireItemsAdded(event); |
| } |
| |
| protected final void fireItemsAdded(String collectionName, Collection<?> addedItems) { |
| this.getChangeSupport().fireItemsAdded(collectionName, addedItems); |
| } |
| |
| protected final void fireItemAdded(String collectionName, Object addedItem) { |
| this.getChangeSupport().fireItemAdded(collectionName, addedItem); |
| } |
| |
| protected final void fireItemsRemoved(CollectionRemoveEvent event) { |
| this.getChangeSupport().fireItemsRemoved(event); |
| } |
| |
| protected final void fireItemsRemoved(String collectionName, Collection<?> removedItems) { |
| this.getChangeSupport().fireItemsRemoved(collectionName, removedItems); |
| } |
| |
| protected final void fireItemRemoved(String collectionName, Object removedItem) { |
| this.getChangeSupport().fireItemRemoved(collectionName, removedItem); |
| } |
| |
| protected final void fireCollectionCleared(CollectionClearEvent event) { |
| this.getChangeSupport().fireCollectionCleared(event); |
| } |
| |
| protected final void fireCollectionCleared(String collectionName) { |
| this.getChangeSupport().fireCollectionCleared(collectionName); |
| } |
| |
| protected final void fireCollectionChanged(CollectionChangeEvent event) { |
| this.getChangeSupport().fireCollectionChanged(event); |
| } |
| |
| protected final void fireCollectionChanged(String collectionName, Collection<?> collection) { |
| this.getChangeSupport().fireCollectionChanged(collectionName, collection); |
| } |
| |
| protected <E> boolean addItemToCollection(E item, Collection<E> collection, String collectionName) { |
| return this.getChangeSupport().addItemToCollection(item, collection, collectionName); |
| } |
| |
| protected <E> boolean addItemsToCollection(E[] items, Collection<E> collection, String collectionName) { |
| return this.getChangeSupport().addItemsToCollection(items, collection, collectionName); |
| } |
| |
| protected <E> boolean addItemsToCollection(Collection<? extends E> items, Collection<E> collection, String collectionName) { |
| return this.getChangeSupport().addItemsToCollection(items, collection, collectionName); |
| } |
| |
| protected <E> boolean addItemsToCollection(Iterable<? extends E> items, Collection<E> collection, String collectionName) { |
| return this.getChangeSupport().addItemsToCollection(items, collection, collectionName); |
| } |
| |
| protected <E> boolean addItemsToCollection(Iterator<? extends E> items, Collection<E> collection, String collectionName) { |
| return this.getChangeSupport().addItemsToCollection(items, collection, collectionName); |
| } |
| |
| protected boolean removeItemFromCollection(Object item, Collection<?> collection, String collectionName) { |
| return this.getChangeSupport().removeItemFromCollection(item, collection, collectionName); |
| } |
| |
| protected boolean removeItemsFromCollection(Object[] items, Collection<?> collection, String collectionName) { |
| return this.getChangeSupport().removeItemsFromCollection(items, collection, collectionName); |
| } |
| |
| protected boolean removeItemsFromCollection(Collection<?> items, Collection<?> collection, String collectionName) { |
| return this.getChangeSupport().removeItemsFromCollection(items, collection, collectionName); |
| } |
| |
| protected boolean removeItemsFromCollection(Iterable<?> items, Collection<?> collection, String collectionName) { |
| return this.getChangeSupport().removeItemsFromCollection(items, collection, collectionName); |
| } |
| |
| protected boolean removeItemsFromCollection(Iterator<?> items, Collection<?> collection, String collectionName) { |
| return this.getChangeSupport().removeItemsFromCollection(items, collection, collectionName); |
| } |
| |
| protected boolean retainItemsInCollection(Object[] items, Collection<?> collection, String collectionName) { |
| return this.getChangeSupport().retainItemsInCollection(items, collection, collectionName); |
| } |
| |
| protected boolean retainItemsInCollection(Collection<?> items, Collection<?> collection, String collectionName) { |
| return this.getChangeSupport().retainItemsInCollection(items, collection, collectionName); |
| } |
| |
| protected boolean retainItemsInCollection(Iterable<?> items, Collection<?> collection, String collectionName) { |
| return this.getChangeSupport().retainItemsInCollection(items, collection, collectionName); |
| } |
| |
| protected boolean retainItemsInCollection(Iterator<?> items, Collection<?> collection, String collectionName) { |
| return this.getChangeSupport().retainItemsInCollection(items, collection, collectionName); |
| } |
| |
| protected boolean clearCollection(Collection<?> collection, String collectionName) { |
| return this.getChangeSupport().clearCollection(collection, collectionName); |
| } |
| |
| protected <E> boolean synchronizeCollection(Collection<E> newCollection, Collection<E> collection, String collectionName) { |
| return this.getChangeSupport().synchronizeCollection(newCollection, collection, collectionName); |
| } |
| |
| protected <E> boolean synchronizeCollection(Iterator<E> newCollection, Collection<E> collection, String collectionName) { |
| return this.getChangeSupport().synchronizeCollection(newCollection, collection, collectionName); |
| } |
| |
| |
| // ********** list change support ********** |
| |
| public void addListChangeListener(String listName, ListChangeListener listener) { |
| this.getChangeSupport().addListChangeListener(listName, listener); |
| } |
| |
| public void removeListChangeListener(String listName, ListChangeListener listener) { |
| this.getChangeSupport().removeListChangeListener(listName, listener); |
| } |
| |
| /** |
| * Return whether the model has any list change listeners that will |
| * be notified when the specified list has changed. |
| */ |
| public boolean hasAnyListChangeListeners(String listName) { |
| return (this.changeSupport != null) && this.changeSupport.hasAnyListChangeListeners(listName); |
| } |
| |
| /** |
| * Return whether the model has no list change listeners that will |
| * be notified when the specified list has changed. |
| */ |
| public boolean hasNoListChangeListeners(String listName) { |
| return ! this.hasAnyListChangeListeners(listName); |
| } |
| |
| protected final void fireItemsAdded(ListAddEvent event) { |
| this.getChangeSupport().fireItemsAdded(event); |
| } |
| |
| protected final void fireItemsAdded(String listName, int index, List<?> addedItems) { |
| this.getChangeSupport().fireItemsAdded(listName, index, addedItems); |
| } |
| |
| protected final void fireItemAdded(String listName, int index, Object addedItem) { |
| this.getChangeSupport().fireItemAdded(listName, index, addedItem); |
| } |
| |
| protected final void fireItemsRemoved(ListRemoveEvent event) { |
| this.getChangeSupport().fireItemsRemoved(event); |
| } |
| |
| protected final void fireItemsRemoved(String listName, int index, List<?> removedItems) { |
| this.getChangeSupport().fireItemsRemoved(listName, index, removedItems); |
| } |
| |
| protected final void fireItemRemoved(String listName, int index, Object removedItem) { |
| this.getChangeSupport().fireItemRemoved(listName, index, removedItem); |
| } |
| |
| protected final void fireItemsReplaced(ListReplaceEvent event) { |
| this.getChangeSupport().fireItemsReplaced(event); |
| } |
| |
| protected final <E> void fireItemsReplaced(String listName, int index, List<? extends E> newItems, List<E> replacedItems) { |
| this.getChangeSupport().fireItemsReplaced(listName, index, newItems, replacedItems); |
| } |
| |
| protected final void fireItemReplaced(String listName, int index, Object newItem, Object replacedItem) { |
| this.getChangeSupport().fireItemReplaced(listName, index, newItem, replacedItem); |
| } |
| |
| protected final void fireItemsMoved(ListMoveEvent event) { |
| this.getChangeSupport().fireItemsMoved(event); |
| } |
| |
| protected final <E> void fireItemsMoved(String listName, int targetIndex, int sourceIndex, int length) { |
| this.getChangeSupport().fireItemsMoved(listName, targetIndex, sourceIndex, length); |
| } |
| |
| protected final void fireItemMoved(String listName, int targetIndex, int sourceIndex) { |
| this.getChangeSupport().fireItemMoved(listName, targetIndex, sourceIndex); |
| } |
| |
| protected final void fireListCleared(ListClearEvent event) { |
| this.getChangeSupport().fireListCleared(event); |
| } |
| |
| protected final void fireListCleared(String listName) { |
| this.getChangeSupport().fireListCleared(listName); |
| } |
| |
| protected final void fireListChanged(ListChangeEvent event) { |
| this.getChangeSupport().fireListChanged(event); |
| } |
| |
| protected final void fireListChanged(String listName, List<?> list) { |
| this.getChangeSupport().fireListChanged(listName, list); |
| } |
| |
| protected <E> void addItemToList(int index, E item, List<E> list, String listName) { |
| this.getChangeSupport().addItemToList(index, item, list, listName); |
| } |
| |
| protected <E> boolean addItemToList(E item, List<E> list, String listName) { |
| return this.getChangeSupport().addItemToList(item, list, listName); |
| } |
| |
| protected <E> boolean addItemsToList(int index, E[] items, List<E> list, String listName) { |
| return this.getChangeSupport().addItemsToList(index, items, list, listName); |
| } |
| |
| protected <E> boolean addItemsToList(int index, Collection<? extends E> items, List<E> list, String listName) { |
| return this.getChangeSupport().addItemsToList(index, items, list, listName); |
| } |
| |
| protected <E> boolean addItemsToList(int index, Iterable<? extends E> items, List<E> list, String listName) { |
| return this.getChangeSupport().addItemsToList(index, items, list, listName); |
| } |
| |
| protected <E> boolean addItemsToList(int index, Iterator<? extends E> items, List<E> list, String listName) { |
| return this.getChangeSupport().addItemsToList(index, items, list, listName); |
| } |
| |
| protected <E> boolean addItemsToList(E[] items, List<E> list, String listName) { |
| return this.getChangeSupport().addItemsToList(items, list, listName); |
| } |
| |
| protected <E> boolean addItemsToList(Collection<? extends E> items, List<E> list, String listName) { |
| return this.getChangeSupport().addItemsToList(items, list, listName); |
| } |
| |
| protected <E> boolean addItemsToList(Iterable<? extends E> items, List<E> list, String listName) { |
| return this.getChangeSupport().addItemsToList(items, list, listName); |
| } |
| |
| protected <E> boolean addItemsToList(Iterator<? extends E> items, List<E> list, String listName) { |
| return this.getChangeSupport().addItemsToList(items, list, listName); |
| } |
| |
| protected <E> E removeItemFromList(int index, List<E> list, String listName) { |
| return this.getChangeSupport().removeItemFromList(index, list, listName); |
| } |
| |
| protected boolean removeItemFromList(Object item, List<?> list, String listName) { |
| return this.getChangeSupport().removeItemFromList(item, list, listName); |
| } |
| |
| protected <E> List<E> removeItemsFromList(int index, List<E> list, String listName) { |
| return this.getChangeSupport().removeItemsFromList(index, list, listName); |
| } |
| |
| protected <E> List<E> removeItemsFromList(int index, int length, List<E> list, String listName) { |
| return this.getChangeSupport().removeItemsFromList(index, length, list, listName); |
| } |
| |
| protected boolean removeItemsFromList(Object[] items, List<?> list, String listName) { |
| return this.getChangeSupport().removeItemsFromList(items, list, listName); |
| } |
| |
| protected boolean removeItemsFromList(Collection<?> items, List<?> list, String listName) { |
| return this.getChangeSupport().removeItemsFromList(items, list, listName); |
| } |
| |
| protected boolean removeItemsFromList(Iterable<?> items, List<?> list, String listName) { |
| return this.getChangeSupport().removeItemsFromList(items, list, listName); |
| } |
| |
| protected boolean removeItemsFromList(Iterator<?> items, List<?> list, String listName) { |
| return this.getChangeSupport().removeItemsFromList(items, list, listName); |
| } |
| |
| protected boolean retainItemsInList(Object[] items, List<?> list, String listName) { |
| return this.getChangeSupport().retainItemsInList(items, list, listName); |
| } |
| |
| protected boolean retainItemsInList(Collection<?> items, List<?> list, String listName) { |
| return this.getChangeSupport().retainItemsInList(items, list, listName); |
| } |
| |
| protected boolean retainItemsInList(Iterable<?> items, List<?> list, String listName) { |
| return this.getChangeSupport().retainItemsInList(items, list, listName); |
| } |
| |
| protected boolean retainItemsInList(Iterator<?> items, List<?> list, String listName) { |
| return this.getChangeSupport().retainItemsInList(items, list, listName); |
| } |
| |
| protected <E> E setItemInList(int index, E item, List<E> list, String listName) { |
| return this.getChangeSupport().setItemInList(index, item, list, listName); |
| } |
| |
| protected <E> int replaceItemInList(E oldItem, E newItem, List<E> list, String listName) { |
| return this.getChangeSupport().replaceItemInList(oldItem, newItem, list, listName); |
| } |
| |
| protected <E> List<E> setItemsInList(int index, E[] items, List<E> list, String listName) { |
| return this.getChangeSupport().setItemsInList(index, items, list, listName); |
| } |
| |
| protected <E> List<E> setItemsInList(int index, List<? extends E> items, List<E> list, String listName) { |
| return this.getChangeSupport().setItemsInList(index, items, list, listName); |
| } |
| |
| protected <E> void moveItemsInList(int targetIndex, int sourceIndex, int length, List<E> list, String listName) { |
| this.getChangeSupport().moveItemsInList(targetIndex, sourceIndex, length, list, listName); |
| } |
| |
| protected <E> void moveItemInList(int targetIndex, int sourceIndex, List<E> list, String listName) { |
| this.getChangeSupport().moveItemInList(targetIndex, sourceIndex, list, listName); |
| } |
| |
| protected <E> void moveItemInList(int targetIndex, E item, List<E> list, String listName) { |
| this.getChangeSupport().moveItemInList(targetIndex, item, list, listName); |
| } |
| |
| protected boolean clearList(List<?> list, String listName) { |
| return this.getChangeSupport().clearList(list, listName); |
| } |
| |
| protected <E> boolean synchronizeList(List<E> newList, List<E> list, String listName) { |
| return this.getChangeSupport().synchronizeList(newList, list, listName); |
| } |
| |
| protected <E> boolean synchronizeList(Iterator<E> newList, List<E> list, String listName) { |
| return this.getChangeSupport().synchronizeList(newList, list, listName); |
| } |
| |
| |
| // ********** tree change support ********** |
| |
| public void addTreeChangeListener(String treeName, TreeChangeListener listener) { |
| this.getChangeSupport().addTreeChangeListener(treeName, listener); |
| } |
| |
| public void removeTreeChangeListener(String treeName, TreeChangeListener listener) { |
| this.getChangeSupport().removeTreeChangeListener(treeName, listener); |
| } |
| |
| /** |
| * Return whether the model has any tree change listeners that will |
| * be notified when the specified tree has changed. |
| */ |
| public boolean hasAnyTreeChangeListeners(String treeName) { |
| return (this.changeSupport != null) && this.changeSupport.hasAnyTreeChangeListeners(treeName); |
| } |
| |
| /** |
| * Return whether the model has no tree change listeners that will |
| * be notified when the specified tree has changed. |
| */ |
| public boolean hasNoTreeChangeListeners(String treeName) { |
| return ! this.hasAnyTreeChangeListeners(treeName); |
| } |
| |
| protected final void fireNodeAdded(TreeAddEvent event) { |
| this.getChangeSupport().fireNodeAdded(event); |
| } |
| |
| protected final void fireNodeAdded(String treeName, List<?> path) { |
| this.getChangeSupport().fireNodeAdded(treeName, path); |
| } |
| |
| protected final void fireNodeRemoved(TreeRemoveEvent event) { |
| this.getChangeSupport().fireNodeRemoved(event); |
| } |
| |
| protected final void fireNodeRemoved(String treeName, List<?> path) { |
| this.getChangeSupport().fireNodeRemoved(treeName, path); |
| } |
| |
| protected final void fireTreeCleared(TreeClearEvent event) { |
| this.getChangeSupport().fireTreeCleared(event); |
| } |
| |
| protected final void fireTreeCleared(String treeName) { |
| this.getChangeSupport().fireTreeCleared(treeName); |
| } |
| |
| protected final void fireTreeChanged(TreeChangeEvent event) { |
| this.getChangeSupport().fireTreeChanged(event); |
| } |
| |
| protected final void fireTreeChanged(String treeName, Collection<?> nodes) { |
| this.getChangeSupport().fireTreeChanged(treeName, nodes); |
| } |
| |
| |
| // ********** convenience methods ********** |
| |
| /** |
| * Return whether the specified values are equal, with the appropriate <code>null</code> checks. |
| * Convenience method for checking whether an attribute value has changed. |
| * <p> |
| * <em>Do not</em> use this to determine whether to fire a change notification, |
| * {@link ChangeSupport} already does that. |
| */ |
| protected final boolean valuesAreEqual(Object value1, Object value2) { |
| return this.getChangeSupport().valuesAreEqual(value1, value2); |
| } |
| protected final boolean attributeValueHasNotChanged(Object oldValue, Object newValue) { |
| return this.valuesAreEqual(oldValue, newValue); |
| } |
| |
| |
| /** |
| * Return whether the specified values are different, with the appropriate <code>null</code> checks. |
| * Convenience method for checking whether an attribute value has changed. |
| * <p> |
| * <em>Do not</em> use this to determine whether to fire a change notification, |
| * {@link ChangeSupport} already does that. |
| * <p> |
| * For example, after firing the change notification, you can use this method |
| * to decide if some other, related, piece of state needs to be synchronized |
| * with the state that just changed. |
| */ |
| protected final boolean valuesAreDifferent(Object value1, Object value2) { |
| return this.getChangeSupport().valuesAreDifferent(value1, value2); |
| } |
| protected final boolean attributeValueHasChanged(Object oldValue, Object newValue) { |
| return this.valuesAreDifferent(oldValue, newValue); |
| } |
| |
| |
| // ********** Object overrides ********** |
| |
| /** |
| * Although cloning models is usually not a Good Idea, |
| * we should at least support it properly. |
| */ |
| @Override |
| protected AbstractModel clone() throws CloneNotSupportedException { |
| AbstractModel clone = (AbstractModel) super.clone(); |
| // clear out change support - models do not share listeners |
| clone.changeSupport = null; |
| return clone; |
| } |
| |
| /** |
| * e.g. <code>"ClassName[00F3EE42](add'l info)"</code> |
| */ |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| StringTools.buildSimpleToStringOn(this, sb); |
| sb.append('('); |
| int len = sb.length(); |
| this.toString(sb); |
| if (sb.length() == len) { |
| sb.deleteCharAt(len - 1); |
| } else { |
| sb.append(')'); |
| } |
| return sb.toString(); |
| } |
| |
| /** |
| * This method is public so one model can call a nested model's |
| * <code>#toString(StringBuilder)</code>. |
| */ |
| public void toString(@SuppressWarnings("unused") StringBuilder sb) { |
| // subclasses should override this to do something a bit more helpful |
| } |
| |
| } |