org.eclipseguru.gwt.ui.java.GwtJavaUtil.java Source code

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Here is the source code for org.eclipseguru.gwt.ui.java.GwtJavaUtil.java

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/*******************************************************************************
 * Copyright (c) 2006, 2010 EclipseGuru 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:
 *     EclipseGuru - initial API and implementation
 *******************************************************************************/
package org.eclipseguru.gwt.ui.java;

import org.eclipseguru.gwt.ui.GwtUi;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.search.IJavaSearchScope;
import org.eclipse.jdt.core.search.SearchEngine;
import org.eclipse.jdt.launching.JavaRuntime;
import org.eclipse.jdt.ui.JavaUI;
import org.eclipse.jface.window.Window;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.dialogs.SelectionDialog;

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

/**
 * 
 */
public class GwtJavaUtil {

    /**
     * Returns all package fragement roots excluding JRE contributed roots.
     * 
     * @param project
     * @return
     */
    public static IPackageFragmentRoot[] getNonJRERoots(final IJavaProject project) {
        final List<IPackageFragmentRoot> result = new ArrayList<IPackageFragmentRoot>();
        try {
            final IPackageFragmentRoot[] roots = project.getPackageFragmentRoots();
            for (int i = 0; i < roots.length; i++)
                if (!isJRELibrary(roots[i])) {
                    result.add(roots[i]);
                }
        } catch (final JavaModelException e) {
        }
        return result.toArray(new IPackageFragmentRoot[result.size()]);
    }

    /**
     * Returns the default dearch scope
     * 
     * @param project
     * @return
     */
    public static IJavaSearchScope getSearchScope(final IProject project) {
        return SearchEngine.createJavaSearchScope(getNonJRERoots(JavaCore.create(project)));
    }

    /**
     * Indicates if this belongs to a JRE library.
     * 
     * @param root
     * @return
     */
    public static boolean isJRELibrary(final IPackageFragmentRoot root) {
        try {
            final IPath path = root.getRawClasspathEntry().getPath();
            if (path.equals(new Path(JavaRuntime.JRE_CONTAINER))
                    || path.equals(new Path(JavaRuntime.JRELIB_VARIABLE)))
                return true;
        } catch (final JavaModelException e) {
        }
        return false;
    }

    /**
     * Selects a type using the specified resource context
     * 
     * @param resource
     * @param scope
     * @return
     */
    public static String selectType(final IResource resource, final int scope) {
        if (resource == null)
            return null;
        final IProject project = resource.getProject();
        try {
            final SelectionDialog dialog = JavaUI.createTypeDialog(GwtUi.getActiveWorkbenchShell(),
                    PlatformUI.getWorkbench().getProgressService(), getSearchScope(project), scope, false, ""); //$NON-NLS-1$
            dialog.setTitle("Select Type");
            if (dialog.open() == Window.OK) {
                final IType type = (IType) dialog.getResult()[0];
                return type.getFullyQualifiedName('$');
            }
        } catch (final JavaModelException e) {
        }
        return null;
    }

    /**
     * Hidden.
     */
    private GwtJavaUtil() {
        // empty
    }

}