Skip to main content
summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat (limited to 'jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/ListCurator.java')
-rw-r--r--jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/ListCurator.java221
1 files changed, 0 insertions, 221 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/ListCurator.java b/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/ListCurator.java
deleted file mode 100644
index 5420b78d84..0000000000
--- a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/ListCurator.java
+++ /dev/null
@@ -1,221 +0,0 @@
-/*******************************************************************************
- * Copyright (c) 2007, 2008 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.value;
-
-import java.util.ArrayList;
-import java.util.Iterator;
-import java.util.List;
-import java.util.ListIterator;
-
-import org.eclipse.jpt.utility.internal.CollectionTools;
-import org.eclipse.jpt.utility.internal.iterators.ReadOnlyListIterator;
-import org.eclipse.jpt.utility.model.Model;
-import org.eclipse.jpt.utility.model.event.StateChangeEvent;
-import org.eclipse.jpt.utility.model.listener.ChangeListener;
-import org.eclipse.jpt.utility.model.listener.ListChangeListener;
-import org.eclipse.jpt.utility.model.listener.StateChangeListener;
-import org.eclipse.jpt.utility.model.value.ListValueModel;
-import org.eclipse.jpt.utility.model.value.PropertyValueModel;
-
-/**
- * This extension of AspectAdapter provides ListChange support
- * by adapting a subject's state change events to a minimum set
- * of list change events.
- */
-public abstract class ListCurator<S extends Model, E>
- extends AspectAdapter<S>
- implements ListValueModel<E>
-{
- /** How the list looked before the last state change */
- private final ArrayList<E> record;
-
- /** A listener that listens for the subject's state to change */
- private final StateChangeListener stateChangeListener;
-
-
- // ********** constructors **********
-
- /**
- * Construct a Curator for the specified subject.
- */
- protected ListCurator(S subject) {
- this(new StaticPropertyValueModel<S>(subject));
- }
-
- /**
- * Construct a curator for the specified subject holder.
- * The subject holder cannot be null.
- */
- protected ListCurator(PropertyValueModel<? extends S> subjectHolder) {
- super(subjectHolder);
- this.record = new ArrayList<E>();
- this.stateChangeListener = this.buildStateChangeListener();
- }
-
-
- // ********** initialization **********
-
- /**
- * The subject's state has changed, do inventory and report to listeners.
- */
- protected StateChangeListener buildStateChangeListener() {
- return new StateChangeListener() {
- public void stateChanged(StateChangeEvent event) {
- ListCurator.this.submitInventoryReport();
- }
- @Override
- public String toString() {
- return "state change listener";
- }
- };
- }
-
-
- // ********** ListValueModel implementation **********
-
- public Iterator<E> iterator() {
- return this.listIterator();
- }
-
- public ListIterator<E> listIterator() {
- return new ReadOnlyListIterator<E>(this.record);
- }
-
- /**
- * Return the item at the specified index of the subject's list aspect.
- */
- public E get(int index) {
- return this.record.get(index);
- }
-
- /**
- * Return the size of the subject's list aspect.
- */
- public int size() {
- return this.record.size();
- }
-
- /**
- * Return an array manifestation of the subject's list aspect.
- */
- public Object[] toArray() {
- return this.record.toArray();
- }
-
-
- // ********** AspectAdapter implementation **********
-
- @Override
- protected Object getValue() {
- return this.iterator();
- }
-
- @Override
- protected Class<? extends ChangeListener> getListenerClass() {
- return ListChangeListener.class;
- }
-
- @Override
- protected String getListenerAspectName() {
- return LIST_VALUES;
- }
-
- @Override
- protected boolean hasListeners() {
- return this.hasAnyListChangeListeners(LIST_VALUES);
- }
-
- /**
- * The aspect has changed, notify listeners appropriately.
- */
- @Override
- protected void fireAspectChange(Object oldValue, Object newValue) {
- this.fireListChanged(LIST_VALUES);
- }
-
- /**
- * The subject is not null - add our listener.
- */
- @Override
- protected void engageSubject_() {
- ((Model) this.subject).addStateChangeListener(this.stateChangeListener);
- // synch our list *after* we start listening to the subject,
- // since its value might change when a listener is added
- CollectionTools.addAll(this.record, this.iteratorForRecord());
- }
-
- /**
- * The subject is not null - remove our listener.
- */
- @Override
- protected void disengageSubject_() {
- ((Model) this.subject).removeStateChangeListener(this.stateChangeListener);
- // clear out the list when we are not listening to the subject
- this.record.clear();
- }
-
-
- // ********** ListCurator protocol **********
-
- /**
- * This is intended to be different from #ListValueModel.iterator().
- * It is intended to be used only when the subject changes or the
- * subject's "state" changes (as signified by a state change event).
- */
- protected abstract Iterator<E> iteratorForRecord();
-
-
- // ********** behavior **********
-
- void submitInventoryReport() {
- List<E> newRecord = CollectionTools.list(this.iteratorForRecord());
- int recordIndex = 0;
-
- // add items from the new record
- for (E newItem : newRecord) {
- this.inventoryNewItem(recordIndex, newItem);
- recordIndex++;
- }
-
- // clean out items that are no longer in the new record
- for (recordIndex = 0; recordIndex < this.record.size(); ) {
- E item = this.record.get(recordIndex);
-
- if (newRecord.contains(item)) {
- recordIndex++;
- } else {
- this.removeItemFromInventory(recordIndex, item);
- }
- }
- }
-
- private void inventoryNewItem(int recordIndex, E newItem) {
- List<E> rec = new ArrayList<E>(this.record);
-
- if ((recordIndex < rec.size()) && rec.get(recordIndex).equals(newItem)) {
- return;
- }
- if (rec.contains(newItem)) {
- this.removeItemFromInventory(recordIndex, rec.get(recordIndex));
- this.inventoryNewItem(recordIndex, newItem);
- } else {
- this.addItemToInventory(recordIndex, newItem);
- }
- }
-
- private void addItemToInventory(int index, E item) {
- this.addItemToList(index, item, this.record, LIST_VALUES);
- }
-
- private void removeItemFromInventory(int index, E item) {
- this.removeItemFromList(index, this.record, LIST_VALUES);
- }
-
-}

Back to the top