preprocessedprojectmigrationrunnable.java

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/**
 * Copyright (c) 2003-2007 Craig Setera
 * All Rights Reserved.
 * Licensed under the Eclipse Public License - v 1.0
 * For more information see http://www.eclipse.org/legal/epl-v10.html
 */
package eclipseme.core.internal;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.resources.IWorkspaceRunnable;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jdt.core.JavaCore;

import eclipseme.core.IEclipseMECoreConstants;
import eclipseme.core.nature.BuildSpecManipulator;

/**
 * A workspace runnable that walks through the workspace projects and migrates
 * the preprocessor natures and builders such that the preprocessor works
 * within the project rather than requiring the secondary project.
 * <p />
 * Copyright (c) 2003-2007 Craig Setera<br>
 * All Rights Reserved.<br>
 * Licensed under the Eclipse Public License - v 1.0<p/>
 * <br>
 * $Revision$
 * <br>
 * $Date$
 * <br>
 * @author Craig Setera
 */
public class PreprocessedProjectMigrationRunnable implements IWorkspaceRunnable {

	/**
	 * @see org.eclipse.core.resources.IWorkspaceRunnable#run(org.eclipse.core.runtime.IProgressMonitor)
	 */
	public void run(IProgressMonitor monitor) 
		throws CoreException 
	{
		IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
		IProject[] projects = root.getProjects();
		for (int i = 0; i < projects.length; i++) {
			IProject project = projects[i];
			
			if (project.isOpen()) {
				migrateProject(project, monitor);
			}
		}
	}

	/**
	 * The specified project is doing preprocessing.  Update the builders and
	 * natures to match the new implementation.
	 * 
	 * @param project
	 * @param monitor
	 * @throws CoreException 
	 */
	private void migratePreprocessingProject(IProject project, IProgressMonitor monitor) 
		throws CoreException 
	{
		BuildSpecManipulator manipulator = new BuildSpecManipulator(project);
		if (!manipulator.hasBuilder(JavaCore.BUILDER_ID)) {
			manipulator.addBuilderBefore(
				IEclipseMECoreConstants.J2ME_PREVERIFIER_ID, 
				JavaCore.BUILDER_ID, 
				null);
		}
		
		if (!manipulator.hasBuilder(IEclipseMECoreConstants.J2ME_PREPROCESSOR_ID)) {
			manipulator.addBuilderBefore(
				JavaCore.BUILDER_ID, 
				IEclipseMECoreConstants.J2ME_PREPROCESSOR_ID, 
				null);
		}
			
		if (manipulator.hasArguments(IEclipseMECoreConstants.J2ME_PREVERIFIER_ID)) {
			manipulator.replaceBuilder(IEclipseMECoreConstants.J2ME_PREVERIFIER_ID, null);
		}
		
		manipulator.commitChanges(monitor);
	}

	/**
	 * The specified project is open, so go ahead and attempt to migrate that project.
	 * 
	 * @param project
	 * @param monitor 
	 * @throws CoreException 
	 */
	private void migrateProject(IProject project, IProgressMonitor monitor) 
		throws CoreException 
	{
		if (project.hasNature(EclipseMECorePlugin.J2ME_PREPROCESSING_NATURE_ID)) {
			migratePreprocessingProject(project, monitor);
		} else if (project.hasNature(EclipseMECorePlugin.J2ME_PREPROCESSED_NATURE_ID)) {
			// We no longer require this secondary project for the new implementation
			// so go ahead and delete it
			project.delete(true, monitor);
		}
	}
}