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annotate org.eclipse.core.databinding.observable/src/org/eclipse/core/internal/databinding/observable/UnmodifiableObservableValue.d @ 95:6208d4f6a277

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Added trees for databinding.beans and observable
author Frank Benoit <benoit@tionex.de>
date Tue, 21 Apr 2009 10:55:51 +0200
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children b74ac5dfcc06
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6208d4f6a277 Added trees for databinding.beans and observable
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1 /*******************************************************************************
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2 * Copyright (c) 2008 Matthew Hall and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * Matthew Hall - initial API and implementation (bug 219909)
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10 * Matthew Hall - bug 237884
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11 ******************************************************************************/
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12
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13 package org.eclipse.core.internal.databinding.observable;
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14
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15 import org.eclipse.core.databinding.observable.IStaleListener;
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16 import org.eclipse.core.databinding.observable.StaleEvent;
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17 import org.eclipse.core.databinding.observable.value.AbstractObservableValue;
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18 import org.eclipse.core.databinding.observable.value.IObservableValue;
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19 import org.eclipse.core.databinding.observable.value.IValueChangeListener;
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20 import org.eclipse.core.databinding.observable.value.ValueChangeEvent;
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21
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22 /**
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23 * An unmodifiable wrapper class for IObservableValue instances.
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24 * @since 1.1
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25 */
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26 public class UnmodifiableObservableValue : AbstractObservableValue {
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27 private IObservableValue wrappedValue;
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28
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29 /**
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30 * Constructs an UnmodifiableObservableValue which wraps the given
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31 * observable value
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32 *
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33 * @param wrappedValue
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34 * the observable value to wrap in an unmodifiable instance.
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35 */
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36 public this(IObservableValue wrappedValue) {
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37 super(wrappedValue.getRealm());
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38
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39 this.wrappedValue = wrappedValue;
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40 wrappedValue.addValueChangeListener(new class() IValueChangeListener {
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41 public void handleValueChange(ValueChangeEvent event) {
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42 fireValueChange(event.diff);
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43 }
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44 });
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45 wrappedValue.addStaleListener(new class() IStaleListener {
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46 public void handleStale(StaleEvent staleEvent) {
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47 fireStale();
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48 }
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49 });
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50 }
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51
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52 protected Object doGetValue() {
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53 return wrappedValue.getValue();
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54 }
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55
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56 public Object getValueType() {
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57 return wrappedValue.getValueType();
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58 }
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59
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60 public bool isStale() {
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61 return wrappedValue.isStale();
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62 }
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63 }