| /******************************************************************************* |
| * Copyright (c) 2007, 2015 IBM Corporation and others. |
| * 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jface.text.hyperlink; |
| |
| import org.eclipse.core.runtime.Assert; |
| import org.eclipse.core.runtime.IAdaptable; |
| |
| |
| /** |
| * A hyperlink detector that can provide adapters through |
| * a context that can be set by the creator of this hyperlink |
| * detector. |
| * <p> |
| * Clients may subclass. |
| * </p> |
| * |
| * @since 3.3 |
| */ |
| public abstract class AbstractHyperlinkDetector implements IHyperlinkDetector, IHyperlinkDetectorExtension { |
| |
| /** |
| * The context of this hyperlink detector. |
| */ |
| private IAdaptable fContext; |
| |
| /** |
| * Sets this hyperlink detector's context which |
| * is responsible to provide the adapters. |
| * |
| * @param context the context for this hyperlink detector |
| * @throws IllegalArgumentException if the context is <code>null</code> |
| * @throws IllegalStateException if this method is called more than once |
| */ |
| public final void setContext(IAdaptable context) throws IllegalStateException, IllegalArgumentException { |
| Assert.isLegal(context != null); |
| if (fContext != null) |
| throw new IllegalStateException(); |
| fContext= context; |
| } |
| |
| @Override |
| public void dispose() { |
| fContext= null; |
| } |
| |
| /** |
| * Returns an object which is an instance of the given class |
| * and provides additional context for this hyperlink detector. |
| * |
| * @param adapterClass the adapter class to look up |
| * @return an instance that can be cast to the given class, |
| * or <code>null</code> if this object does not |
| * have an adapter for the given class |
| */ |
| protected final <T> T getAdapter(Class<T> adapterClass) { |
| Assert.isLegal(adapterClass != null); |
| if (fContext != null) |
| return fContext.getAdapter(adapterClass); |
| return null; |
| } |
| |
| } |