preprocessedsourcemapper.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.preprocessor;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;

import eclipseme.core.IEclipseMECoreConstants;
import eclipseme.core.hook.sourceMapper.SourceMapper;
import eclipseme.core.internal.EclipseMECorePlugin;

/**
 * An implementation of the {@link SourceMapper} hook interface.  This 
 * mapper attempts to map the requested file to a preprocessed version
 * of the file.
 * <p />
 * Copyright (c) 2003-2007 Craig Setera<br>
 * All Rights Reserved.<br>
 * Licensed under the Eclipse Public License - v 1.0<p/>
 * <br>
 * $Revision: 1.1 $
 * <br>
 * $Date: 2007/01/20 19:22:58 $
 * <br>
 * @author Craig Setera
 */
public class PreprocessedSourceMapper implements SourceMapper {
 	public IFile getMappedResource(IFile sourceFile) {
 		IFile mappedFile = null;
 		
		if (isPreprocessingProject(sourceFile.getProject())) {
			mappedFile = PreprocessorBuilder.getOutputFile(sourceFile);
			if (!mappedFile.exists()) {
				mappedFile = null;
			}
		}
		
 		return mappedFile;
 	}

	/**
	 * Return a boolean indicating whether the specified project has
	 * preprocessing enabled.
	 * 
	 * @param project
	 * @return
	 */
	private boolean isPreprocessingProject(IProject project) {
		boolean preprocessing = false;
		
		try {
			preprocessing =
				project.hasNature(IEclipseMECoreConstants.J2ME_PREPROCESSING_NATURE_ID);
		} catch (CoreException e) {
			EclipseMECorePlugin.log(IStatus.WARNING, e);
		}

		return preprocessing;
	}
}