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Diffstat (limited to 'common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/prefs/PreferencesCollectionValueModel.java')
-rw-r--r--common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/prefs/PreferencesCollectionValueModel.java202
1 files changed, 0 insertions, 202 deletions
diff --git a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/prefs/PreferencesCollectionValueModel.java b/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/prefs/PreferencesCollectionValueModel.java
deleted file mode 100644
index e37b2666ca..0000000000
--- a/common/plugins/org.eclipse.jpt.common.utility/src/org/eclipse/jpt/common/utility/internal/model/value/prefs/PreferencesCollectionValueModel.java
+++ /dev/null
@@ -1,202 +0,0 @@
-/*******************************************************************************
- * Copyright (c) 2007, 2012 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.common.utility.internal.model.value.prefs;
-
-import java.util.EventListener;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.prefs.BackingStoreException;
-import java.util.prefs.PreferenceChangeEvent;
-import java.util.prefs.PreferenceChangeListener;
-import java.util.prefs.Preferences;
-
-import org.eclipse.jpt.common.utility.internal.CollectionTools;
-import org.eclipse.jpt.common.utility.internal.iterators.ArrayIterator;
-import org.eclipse.jpt.common.utility.internal.iterators.TransformationIterator;
-import org.eclipse.jpt.common.utility.internal.model.value.AspectAdapter;
-import org.eclipse.jpt.common.utility.internal.model.value.StaticPropertyValueModel;
-import org.eclipse.jpt.common.utility.model.listener.CollectionChangeListener;
-import org.eclipse.jpt.common.utility.model.value.CollectionValueModel;
-import org.eclipse.jpt.common.utility.model.value.PropertyValueModel;
-
-/**
- * This adapter wraps a Preferences node and converts its preferences into a
- * CollectionValueModel of PreferencePropertyValueModels. It listens for
- * "preference" changes and converts them into VALUE collection changes.
- */
-public class PreferencesCollectionValueModel<P>
- extends AspectAdapter<Preferences, Object>
- implements CollectionValueModel<PreferencePropertyValueModel<P>>
-{
-
- /** Cache the current preferences, stored in models and keyed by name. */
- protected final HashMap<String, PreferencePropertyValueModel<P>> preferences;
-
- /** A listener that listens to the preferences node for added or removed preferences. */
- protected final PreferenceChangeListener preferenceChangeListener;
-
-
- // ********** constructors **********
-
- /**
- * Construct an adapter for the specified preferences node.
- */
- public PreferencesCollectionValueModel(Preferences preferences) {
- this(new StaticPropertyValueModel<Preferences>(preferences));
- }
-
- /**
- * Construct an adapter for the specified preferences node.
- */
- public PreferencesCollectionValueModel(PropertyValueModel<? extends Preferences> preferencesHolder) {
- super(preferencesHolder);
- this.preferences = new HashMap<String, PreferencePropertyValueModel<P>>();
- this.preferenceChangeListener = this.buildPreferenceChangeListener();
- }
-
-
- // ********** initialization **********
-
- /**
- * A preferences have changed, notify the listeners.
- */
- protected PreferenceChangeListener buildPreferenceChangeListener() {
- // transform the preference change events into VALUE collection change events
- return new PreferenceChangeListener() {
- public void preferenceChange(PreferenceChangeEvent event) {
- PreferencesCollectionValueModel.this.preferenceChanged(event.getKey(), event.getNewValue());
- }
- @Override
- public String toString() {
- return "preference change listener"; //$NON-NLS-1$
- }
- };
- }
-
-
- // ********** CollectionValueModel implementation **********
-
- /**
- * Return an iterator on the preference models.
- */
- public synchronized Iterator<PreferencePropertyValueModel<P>> iterator() {
- return this.preferences.values().iterator();
- }
-
- public synchronized int size() {
- return this.preferences.size();
- }
-
-
- // ********** AspectAdapter implementation **********
-
- @Override
- protected Object getAspectValue() {
- return this.iterator();
- }
-
- @Override
- protected Class<? extends EventListener> getListenerClass() {
- return CollectionChangeListener.class;
- }
-
- @Override
- protected String getListenerAspectName() {
- return VALUES;
- }
-
- @Override
- protected boolean hasListeners() {
- return this.hasAnyCollectionChangeListeners(VALUES);
- }
-
- @Override
- protected void fireAspectChanged(Object oldValue, Object newValue) {
- @SuppressWarnings("unchecked") Iterator<PreferencePropertyValueModel<P>> iterator = (Iterator<PreferencePropertyValueModel<P>>) newValue;
- this.fireCollectionChanged(VALUES, CollectionTools.collection(iterator));
- }
-
- @Override
- protected void engageSubject_() {
- this.subject.addPreferenceChangeListener(this.preferenceChangeListener);
- for (Iterator<PreferencePropertyValueModel<P>> stream = this.preferenceModels(); stream.hasNext(); ) {
- PreferencePropertyValueModel<P> preferenceModel = stream.next();
- this.preferences.put(preferenceModel.getKey(), preferenceModel);
- }
- }
-
- @Override
- protected void disengageSubject_() {
- try {
- this.subject.removePreferenceChangeListener(this.preferenceChangeListener);
- } catch (IllegalStateException ex) {
- // for some odd reason, we are not allowed to remove a listener from a "dead"
- // preferences node; so handle the exception that gets thrown here
- if ( ! ex.getMessage().equals("Node has been removed.")) { //$NON-NLS-1$
- // if it is not the expected exception, re-throw it
- throw ex;
- }
- }
- this.preferences.clear();
- }
-
-
- // ********** AbstractModel implementation **********
-
- @Override
- public void toString(StringBuilder sb) {
- sb.append(this.subject);
- }
-
-
- // ********** internal methods **********
-
- /**
- * Return an iterator on the preference models.
- * At this point we can be sure that the subject is not null.
- */
- protected Iterator<PreferencePropertyValueModel<P>> preferenceModels() {
- String[] keys;
- try {
- keys = this.subject.keys();
- } catch (BackingStoreException ex) {
- throw new RuntimeException(ex);
- }
- return new TransformationIterator<String, PreferencePropertyValueModel<P>>(new ArrayIterator<String>(keys)) {
- @Override
- protected PreferencePropertyValueModel<P> transform(String key) {
- return PreferencesCollectionValueModel.this.buildPreferenceModel(key);
- }
- };
- }
-
- /**
- * Override this method to tweak the model used to wrap the
- * specified preference (e.g. to customize the model's converter).
- */
- protected PreferencePropertyValueModel<P> buildPreferenceModel(String key) {
- return new PreferencePropertyValueModel<P>(this.subjectHolder, key);
- }
-
- protected synchronized void preferenceChanged(String key, String newValue) {
- if (newValue == null) {
- // a preference was removed
- PreferencePropertyValueModel<P> preferenceModel = this.preferences.remove(key);
- this.fireItemRemoved(VALUES, preferenceModel);
- } else if ( ! this.preferences.containsKey(key)) {
- // a preference was added
- PreferencePropertyValueModel<P> preferenceModel = this.buildPreferenceModel(key);
- this.preferences.put(key, preferenceModel);
- this.fireItemAdded(VALUES, preferenceModel);
- } else {
- // a preference's value changed - do nothing
- }
- }
-}

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