com.google.gwt.eclipse.core.nature.GWTNature.java Source code

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Here is the source code for com.google.gwt.eclipse.core.nature.GWTNature.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.gwt.eclipse.core.nature;

import com.google.gdt.eclipse.core.BuilderUtilities;
import com.google.gdt.eclipse.core.MarkerUtilities;
import com.google.gdt.eclipse.core.natures.NatureUtils;
import com.google.gdt.eclipse.core.validators.WebAppProjectValidator;
import com.google.gwt.eclipse.core.GWTPluginLog;
import com.google.gwt.eclipse.core.util.Util;
import com.google.gwt.eclipse.core.validators.GWTProjectValidator;
import com.google.gwt.eclipse.core.validators.java.JavaCompilationParticipant;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IProjectNature;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.wst.common.project.facet.core.FacetedProjectFramework;

/**
 * Identifies a Java project as a GWT project.
 */
public class GWTNature implements IProjectNature {

    public static final String NATURE_ID = "com.gwtplugins.gwt.eclipse.core.gwtNature";

    // TODO: do this in background (WorkspaceJob)?
    public static void addNatureToProject(IProject project) throws CoreException {
        NatureUtils.addNature(project, GWTNature.NATURE_ID);
    }

    /**
     * Returns if the GWT nature installed or if the GWT facet is enabled.
     */
    public static boolean isGWTProject(IProject project) {
        try {
            return project.isAccessible() && (project.hasNature(GWTNature.NATURE_ID)
                    || FacetedProjectFramework.hasProjectFacet(project, "com.gwtplugins.gwt.facet"));
        } catch (CoreException e) {
            GWTPluginLog.logError(e);
        }
        return false;
    }

    // TODO: do this in background (WorkspaceJob)?
    public static void removeNatureFromProject(IProject project) throws CoreException {
        if (!project.hasNature(GWTNature.NATURE_ID)) {
            return;
        }

        // Clear any GWT build artifacts.
        JavaCompilationParticipant.cleanBuildArtifacts(project);
        MarkerUtilities.clearMarkers(GWTProjectValidator.PROBLEM_MARKER_ID, project);

        // Remove the GWT Nature ID from the natures in the project description
        NatureUtils.removeNature(project, GWTNature.NATURE_ID);
    }

    private static void resetDefaultEditors() {
        // To ensure that the GWT Java Editor is the default for any Java files
        // inside this GWT project, make sure no editors are declared default for
        // the .java file extension. The GWT Java Editor will be the default
        // because of its association with content type "GWT Java Source File"
        Util.resetDefaultEditor("java");

        // Do a similar thing for xml files within the GWT project, in order to
        // ensure
        // that the GWT Module Editor opens for GWT Module files.
        Util.resetDefaultEditor("xml");
    }

    private IProject project;

    @Override
    public void configure() throws CoreException {
        BuilderUtilities.addBuilderToProject(project, WebAppProjectValidator.BUILDER_ID);
        BuilderUtilities.addBuilderToProject(project, GWTProjectValidator.BUILDER_ID);
        resetDefaultEditors();
    }

    @Override
    public void deconfigure() throws CoreException {
        BuilderUtilities.removeBuilderFromProject(project, GWTProjectValidator.BUILDER_ID);
        WebAppProjectValidator.removeBuilderIfNoGwtOrAppEngineNature(project);
    }

    @Override
    public IProject getProject() {
        return project;
    }

    @Override
    public void setProject(IProject project) {
        this.project = project;
    }
}