org.jboss.tools.jst.web.ui.internal.editor.util.FileUtil.java Source code

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Here is the source code for org.jboss.tools.jst.web.ui.internal.editor.util.FileUtil.java

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/*******************************************************************************
 * Copyright (c) 2007-2010 Exadel, Inc. and Red Hat, Inc.
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is 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:
 *     Exadel, Inc. and Red Hat, Inc. - initial API and implementation
 ******************************************************************************/
package org.jboss.tools.jst.web.ui.internal.editor.util;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.search.IJavaSearchConstants;
import org.eclipse.jdt.core.search.IJavaSearchScope;
import org.eclipse.jdt.core.search.SearchEngine;
import org.eclipse.jdt.core.search.SearchMatch;
import org.eclipse.jdt.core.search.SearchParticipant;
import org.eclipse.jdt.core.search.SearchPattern;
import org.eclipse.jdt.core.search.SearchRequestor;
import org.jboss.tools.jst.web.ui.WebUiPlugin;

/**
 * 
 * @author yzhishko
 *
 */

public class FileUtil {

    public final static int INITIAL_CAPACITY = 20;

    public static IJavaElement searchForClass(IJavaProject javaProject, String className)
            throws JavaModelException {
        // Get the search pattern
        SearchPattern pattern = SearchPattern.createPattern(className, IJavaSearchConstants.TYPE,
                IJavaSearchConstants.DECLARATIONS, SearchPattern.R_EXACT_MATCH | SearchPattern.R_CASE_SENSITIVE);
        // Get the search scope
        IJavaSearchScope scope = SearchEngine.createJavaSearchScope(new IJavaElement[] { javaProject });

        final List<SearchMatch> matches = new ArrayList<SearchMatch>(INITIAL_CAPACITY);
        // Get the search requestor
        SearchRequestor requestor = new SearchRequestor() {
            public void acceptSearchMatch(SearchMatch match) throws CoreException {
                matches.add(match);
            }
        };

        // Search
        SearchEngine searchEngine = new SearchEngine();
        try {
            searchEngine.search(pattern, new SearchParticipant[] { SearchEngine.getDefaultSearchParticipant() },
                    scope, requestor, null);
        } catch (CoreException ex) {
            WebUiPlugin.getPluginLog().logError(ex);
        }
        for (SearchMatch match : matches) {
            IJavaElement element = (IJavaElement) match.getElement();
            if (element instanceof IType && className.equals(((IType) element).getFullyQualifiedName('.'))) {
                return element;
            }
        }
        return javaProject.findType(className, new NullProgressMonitor());
    }
}