com.google.gdt.eclipse.core.ui.JavaProjectSelectionDialog.java Source code

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Here is the source code for com.google.gdt.eclipse.core.ui.JavaProjectSelectionDialog.java

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/*******************************************************************************
 * Copyright 2011 Google Inc. All Rights Reserved.
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package com.google.gdt.eclipse.core.ui;

import com.google.gdt.eclipse.core.CorePluginLog;
import com.google.gdt.eclipse.core.natures.NatureUtils;

import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.ui.JavaElementLabelProvider;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.dialogs.ElementListSelectionDialog;

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

/**
 * Selects a Java project from a list, optionally filtered to only those having
 * a particular nature.
 */
public class JavaProjectSelectionDialog extends ElementListSelectionDialog {

    /**
     * Opens the dialog for the user to choose a Java project.
     * 
     * @param shell the parent shell
     * @param initialSelection the initially-selected project, or
     *          <code>null</code>
     * @param requiredNatures the natures that chosen project must have, or
     *          <code>null</code>
     * @return the selected project, or <code>null</code> if the dialog was
     *         canceled
     */
    public static IJavaProject chooseProject(Shell shell, IJavaProject initialSelection,
            Set<String> requiredNatures) {
        // Start with all the Java projects in the workspace
        List<IJavaProject> javaProjects = new ArrayList<IJavaProject>();
        try {
            javaProjects.addAll(
                    Arrays.asList(JavaCore.create(ResourcesPlugin.getWorkspace().getRoot()).getJavaProjects()));
        } catch (JavaModelException e) {
            CorePluginLog.logError(e);
        }

        // Filter the list to only show projects with the specified nature
        if (requiredNatures != null) {
            Iterator<IJavaProject> iter = javaProjects.iterator();
            while (iter.hasNext()) {
                IJavaProject javaProject = iter.next();
                for (String requiredNature : requiredNatures) {
                    try {
                        if (!NatureUtils.hasNature(javaProject.getProject(), requiredNature)) {
                            iter.remove();
                            break;
                        }
                    } catch (CoreException e) {
                        CorePluginLog.logError(e);
                    }
                }
            }
        }

        ElementListSelectionDialog dialog = new JavaProjectSelectionDialog(shell, javaProjects, initialSelection);

        if (dialog.open() == Window.OK) {
            return (IJavaProject) dialog.getFirstResult();
        }
        return null;
    }

    private JavaProjectSelectionDialog(Shell parent, List<IJavaProject> projects, IJavaProject initialSelection) {
        super(parent, new JavaElementLabelProvider(JavaElementLabelProvider.SHOW_DEFAULT));
        setTitle("Project Selection");
        setMessage("Choose a project:");
        setElements(projects.toArray(new IJavaProject[0]));
        setInitialSelections(new Object[] { initialSelection });
        setHelpAvailable(false);
    }

}