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/*******************************************************************************
* 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;
}
}
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