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/*******************************************************************************
* Copyright (c) 2004, 2006 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.wst.common.core.search.internal;
import org.eclipse.core.expressions.EvaluationResult;
import org.eclipse.core.expressions.Expression;
import org.eclipse.core.expressions.ExpressionConverter;
import org.eclipse.core.expressions.ExpressionTagNames;
import org.eclipse.core.expressions.IEvaluationContext;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.wst.common.core.search.SearchParticipant;
public class SearchParticipantDescriptor
{
private IConfigurationElement fElement;
private SearchParticipant participant;
public SearchParticipantDescriptor(IConfigurationElement element)
{
this.fElement = element;
}
public SearchParticipant getSearchParticipant()
{
if (participant == null)
{
try
{
participant = (SearchParticipant) fElement
.createExecutableExtension("class"); //$NON-NLS-1$
} catch (Exception e)
{
// e.printStackTrace();
}
}
return participant;
}
public boolean matches(IEvaluationContext context) throws CoreException
{
IConfigurationElement[] elements = fElement
.getChildren(ExpressionTagNames.ENABLEMENT);
if (elements.length == 0)
return false;
Assert.isTrue(elements.length == 1);
Expression exp = ExpressionConverter.getDefault().perform(elements[0]);
return convert(exp.evaluate(context));
}
private boolean convert(EvaluationResult eval)
{
if (eval == EvaluationResult.FALSE)
return false;
return true;
}
/**
* @deprecated No replacement
*/
public String[] getSupportedContentTypes()
{
return new String[0];
}
/**
* @deprecated No replacement
*/
public void addSupportedContentTypeId(String contentTypeId)
{
}
public String getElementId(){
return fElement.getAttribute("id");
}
}
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