| /******************************************************************************* |
| * 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"); |
| |
| } |
| } |