org.parallelj.tools.constraint.BeginConstraints Maven / Gradle / Ivy

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/*
 *     ParallelJ, framework for parallel computing
 *
 *     Copyright (C) 2010, 2011, 2012 Atos Worldline or third-party contributors as
 *     indicated by the @author tags or express copyright attribution
 *     statements applied by the authors.
 *
 *     This library is free software; you can redistribute it and/or
 *     modify it under the terms of the GNU Lesser General Public
 *     License as published by the Free Software Foundation; either
 *     version 2.1 of the License.
 *
 *     This library is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 *     Lesser General Public License for more details.
 *
 *     You should have received a copy of the GNU Lesser General Public
 *     License along with this library; if not, write to the Free Software
 *     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */
package org.parallelj.tools.constraint;

import java.util.Set;

import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.SupportedAnnotationTypes;
import javax.annotation.processing.SupportedSourceVersion;
import javax.lang.model.SourceVersion;
import javax.lang.model.element.Element;
import javax.lang.model.element.TypeElement;
import javax.tools.Diagnostic.Kind;

import org.parallelj.Begin;
import org.parallelj.Program;
import org.parallelj.tools.AbstractProcessor;

/**
 * Check the constraints of {@link Begin}.
 * 
 * @author Laurent Legrand
 * 
 * @see //J - Begin
 * 
 */
@SupportedAnnotationTypes({ "org.parallelj.Begin", "org.parallelj.Program" })
@SupportedSourceVersion(SourceVersion.RELEASE_7)
public class BeginConstraints extends AbstractProcessor {

	@Override
	public boolean process(Set annotations,
			RoundEnvironment roundEnv) {
		for (Element element : roundEnv.getElementsAnnotatedWith(Program.class)) {
			this.verifyCardinality(element);
		}
		for (Element element : roundEnv.getElementsAnnotatedWith(Begin.class)) {
			this.verifyCardinality(element.getEnclosingElement());
		}
		return true;
	}

	/**
	 * 
	 * 
	 * @param type
	 */
	private void verifyCardinality(Element type) {
		int count = 0;
		for (Element e : type.getEnclosedElements()) {
			if (e.getAnnotation(Begin.class) != null) {
			}
		}
		if (count != 1) {
			this.processingEnv.getMessager().printMessage(
					Kind.WARNING,
					String.format("%s: Type has %d elements annotated with %s",
							this.getClass().getSimpleName(), count,
							Begin.class.getName()), type);
		}

	}
}