/*
* $Id$
*
* SARL is an general-purpose agent programming language.
* More details on http://www.sarl.io
*
* Copyright (C) 2014-2017 the original authors or authors.
*
* 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 io.sarl.lang.controlflow;
import java.util.Collection;
import java.util.Collections;
import javax.inject.Inject;
import com.google.inject.Singleton;
import org.eclipse.xtext.common.types.JvmAnnotationTarget;
import org.eclipse.xtext.common.types.JvmIdentifiableElement;
import org.eclipse.xtext.common.types.JvmType;
import org.eclipse.xtext.common.types.JvmTypeReference;
import org.eclipse.xtext.common.types.util.AnnotationLookup;
import org.eclipse.xtext.xbase.XAbstractFeatureCall;
import org.eclipse.xtext.xbase.XExpression;
import org.eclipse.xtext.xbase.controlflow.DefaultEarlyExitComputer;
import io.sarl.lang.annotation.EarlyExit;
import io.sarl.lang.sarl.SarlBreakExpression;
/** Compute the early-exit flag for the SARL statements.
*
* @author $Author: sgalland$
* @version $FullVersion$
* @mavengroupid $GroupId$
* @mavenartifactid $ArtifactId$
*/
@Singleton
public class SARLEarlyExitComputer extends DefaultEarlyExitComputer implements ISarlEarlyExitComputer {
@Inject
private AnnotationLookup annotations;
@Override
protected Collection<ExitPoint> _exitPoints(XAbstractFeatureCall expression) {
final Collection<ExitPoint> exitPoints = super._exitPoints(expression);
if (isNotEmpty(exitPoints)) {
return exitPoints;
}
final JvmIdentifiableElement element = expression.getFeature();
if (isEarlyExitAnnotatedElement(element)) {
return Collections.<ExitPoint>singletonList(new ExitPoint(expression, true));
}
return Collections.emptyList();
}
@Override
public boolean isEarlyExitEvent(JvmTypeReference reference) {
if (reference != null && !reference.eIsProxy()) {
final JvmType type = reference.getType();
return isEarlyExitAnnotatedElement(type);
}
return false;
}
@Override
public boolean isEarlyExitAnnotatedElement(Object element) {
return (element instanceof JvmAnnotationTarget)
&& (this.annotations.findAnnotation((JvmAnnotationTarget) element, EarlyExit.class) != null);
}
@Override
public boolean isEarlyExitLoop(XExpression expression) {
return expression instanceof SarlBreakExpression;
}
}