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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 ******************************************************************************/
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11
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12 module org.eclipse.core.internal.databinding.observable.UnmodifiableObservableValue;
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13
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14 import java.lang.all;
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15
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16 import org.eclipse.core.databinding.observable.IStaleListener;
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17 import org.eclipse.core.databinding.observable.StaleEvent;
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18 import org.eclipse.core.databinding.observable.value.AbstractObservableValue;
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19 import org.eclipse.core.databinding.observable.value.IObservableValue;
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20 import org.eclipse.core.databinding.observable.value.IValueChangeListener;
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21 import org.eclipse.core.databinding.observable.value.ValueChangeEvent;
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22
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23 /**
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24 * An unmodifiable wrapper class for IObservableValue instances.
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25 * @since 1.1
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26 */
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27 public class UnmodifiableObservableValue : AbstractObservableValue {
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28 private IObservableValue wrappedValue;
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29
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30 /**
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31 * Constructs an UnmodifiableObservableValue which wraps the given
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32 * observable value
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33 *
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34 * @param wrappedValue
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35 * the observable value to wrap in an unmodifiable instance.
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36 */
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37 public this(IObservableValue wrappedValue) {
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38 super(wrappedValue.getRealm());
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39
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40 this.wrappedValue = wrappedValue;
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41 wrappedValue.addValueChangeListener(new class() IValueChangeListener {
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42 public void handleValueChange(ValueChangeEvent event) {
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43 fireValueChange(event.diff);
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44 }
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45 });
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46 wrappedValue.addStaleListener(new class() IStaleListener {
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47 public void handleStale(StaleEvent staleEvent) {
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48 fireStale();
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49 }
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50 });
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51 }
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52
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53 protected Object doGetValue() {
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54 return wrappedValue.getValue();
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55 }
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56
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57 public Object getValueType() {
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58 return wrappedValue.getValueType();
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59 }
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60 }
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