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1 /*******************************************************************************
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2 * Copyright (c) 2007 IBM Corporation 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 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.jface.text.hyperlink.AbstractHyperlinkDetector;
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14
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15 import dwt.dwthelper.utils;
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16
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17 import dwtx.core.runtime.Assert;
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18 import dwtx.core.runtime.IAdaptable;
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19
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20
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21 /**
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22 * A hyperlink detector that can provide adapters through
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23 * a context that can be set by the creator of this hyperlink
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24 * detector.
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25 * <p>
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26 * Clients may subclass.
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27 * </p>
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28 *
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29 * @since 3.3
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30 */
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31 public abstract class AbstractHyperlinkDetector : IHyperlinkDetector, IHyperlinkDetectorExtension {
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32
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33 /**
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34 * The context of this hyperlink detector.
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35 */
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36 private IAdaptable fContext;
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37
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38 /**
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39 * Sets this hyperlink detector's context which
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40 * is responsible to provide the adapters.
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41 *
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42 * @param context the context for this hyperlink detector
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43 * @throws IllegalArgumentException if the context is <code>null</code>
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44 * @throws IllegalStateException if this method is called more than once
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45 */
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46 public final void setContext(IAdaptable context) throws IllegalStateException, IllegalArgumentException {
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47 Assert.isLegal(context !is null);
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48 if (fContext !is null)
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49 throw new IllegalStateException();
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50 fContext= context;
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51 }
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52
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53 /*
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54 * @see dwtx.jface.text.hyperlink.IHyperlinkDetectorExtension#dispose()
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55 */
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56 public void dispose() {
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57 fContext= null;
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58 }
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59
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60 /**
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61 * Returns an object which is an instance of the given class
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62 * and provides additional context for this hyperlink detector.
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63 *
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64 * @param adapterClass the adapter class to look up
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65 * @return an instance that can be cast to the given class,
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66 * or <code>null</code> if this object does not
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67 * have an adapter for the given class
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68 */
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69 protected final Object getAdapter(Class adapterClass) {
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70 Assert.isLegal(adapterClass !is null);
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71 if (fContext !is null)
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72 return fContext.getAdapter(adapterClass);
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73 return null;
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74 }
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75
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76 }
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