in.cypal.studio.gwt.core.facet.InstallDelegate.java Source code

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Here is the source code for in.cypal.studio.gwt.core.facet.InstallDelegate.java

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/*
 * Copyright 2006 -2008 Cypal Solutions (tools@cypal.in)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * 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 in.cypal.studio.gwt.core.facet;

import in.cypal.studio.gwt.core.Activator;
import in.cypal.studio.gwt.core.common.Constants;
import in.cypal.studio.gwt.core.common.Util;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IProjectDescription;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.SubProgressMonitor;
import org.eclipse.jdt.core.IAccessRule;
import org.eclipse.jdt.core.IClasspathAttribute;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.wst.common.project.facet.core.IDelegate;
import org.eclipse.wst.common.project.facet.core.IProjectFacetVersion;

/**
 * @author Prakash G.R.
 * 
 */
public class InstallDelegate implements IDelegate {

    public void execute(IProject project, IProjectFacetVersion facetVersion, Object config,
            IProgressMonitor monitor) throws CoreException {

        monitor = Util.getNonNullMonitor(monitor);

        try {

            monitor.beginTask("", 3);

            addNature(project, new SubProgressMonitor(monitor, 1));
            addUserLibToClassPath(project, new SubProgressMonitor(monitor, 1));
            addServletLibToWebInf(project, new SubProgressMonitor(monitor, 1));

        } catch (CoreException e) {
            monitor.setCanceled(true);
            Activator.logException(e);
        } finally {
            monitor.done();
        }
    }

    public static void addUserLibToClassPath(IProject project, IProgressMonitor monitor) {

        monitor = Util.getNonNullMonitor(monitor);
        try {

            IJavaProject javaProject = JavaCore.create(project);
            IClasspathEntry[] oldClasspath = javaProject.getRawClasspath();
            IClasspathEntry[] newClasspath = new IClasspathEntry[oldClasspath.length + 1];
            System.arraycopy(oldClasspath, 0, newClasspath, 0, oldClasspath.length);
            IClasspathEntry gwtuserJarEntry = JavaCore.newVariableEntry(Util.getGwtUserLibPath(), null, null);
            gwtuserJarEntry = JavaCore.newVariableEntry(gwtuserJarEntry.getPath(), null, null, new IAccessRule[0],
                    new IClasspathAttribute[0], false);
            newClasspath[oldClasspath.length] = gwtuserJarEntry;
            javaProject.setRawClasspath(newClasspath, monitor);

        } catch (CoreException e) {
            // the jar is already in the classpath.
            Activator.logException(e);
        } finally {
            monitor.done();
        }

    }

    public static void addServletLibToWebInf(IProject project, IProgressMonitor monitor) {

        monitor = Util.getNonNullMonitor(monitor);

        try {
            monitor.beginTask("", 1);

            IJavaProject javaProject = JavaCore.create(project);
            IClasspathEntry[] oldClasspath = javaProject.getRawClasspath();
            IClasspathEntry[] newClasspath = new IClasspathEntry[oldClasspath.length + 1];
            System.arraycopy(oldClasspath, 0, newClasspath, 0, oldClasspath.length);
            IClasspathEntry gwtServletJarEntry = JavaCore.newVariableEntry(Util.getGwtServletLibPath(), null, null);
            IClasspathAttribute attr = JavaCore.newClasspathAttribute("org.eclipse.jst.component.dependency",
                    "/WEB-INF/lib");
            gwtServletJarEntry = JavaCore.newVariableEntry(gwtServletJarEntry.getPath(), null, null,
                    new IAccessRule[0], new IClasspathAttribute[] { attr }, false);
            newClasspath[oldClasspath.length] = gwtServletJarEntry;
            javaProject.setRawClasspath(newClasspath, monitor);

        } catch (JavaModelException e) {
            // the jar is already in the classpath.
            Activator.logException(e);
        } finally {
            monitor.done();
        }
    }

    private void addNature(IProject project, IProgressMonitor monitor) throws CoreException {

        monitor = Util.getNonNullMonitor(monitor);

        try {

            monitor.beginTask("", 1);

            IProjectDescription description = project.getDescription();
            String[] prevNatures = description.getNatureIds();
            String[] newNatures = new String[prevNatures.length + 1];
            System.arraycopy(prevNatures, 0, newNatures, 1, prevNatures.length);
            newNatures[0] = Constants.NATURE_ID;
            description.setNatureIds(newNatures);

            project.setDescription(description, IResource.FORCE, null);

        } finally {
            monitor.done();
        }
    }

}