/*******************************************************************************
* Copyright (c) 2009 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Zend Technologies
*******************************************************************************/
package org.eclipse.php.internal.core.typeinference.evaluators;
import java.util.List;
import org.eclipse.dltk.evaluation.types.AmbiguousType;
import org.eclipse.dltk.evaluation.types.MultiTypeType;
import org.eclipse.dltk.ti.GoalState;
import org.eclipse.dltk.ti.goals.GoalEvaluator;
import org.eclipse.dltk.ti.goals.IGoal;
import org.eclipse.dltk.ti.types.IEvaluatedType;
import org.eclipse.php.internal.core.typeinference.goals.ForeachStatementGoal;
import org.eclipse.php.internal.core.typeinference.goals.IteratorTypeGoal;
/**
* This evaluator determines types that array expression in foreach statement
* holds
*/
public class ForeachStatementEvaluator extends GoalEvaluator {
private IEvaluatedType result;
public ForeachStatementEvaluator(IGoal goal) {
super(goal);
}
public IGoal[] init() {
ForeachStatementGoal typedGoal = (ForeachStatementGoal) goal;
return new IGoal[] { new IteratorTypeGoal(goal.getContext(),
typedGoal.getExpression()) };
}
public IGoal[] subGoalDone(IGoal subgoal, Object result, GoalState state) {
if (result instanceof MultiTypeType) {
List<IEvaluatedType> types = ((MultiTypeType) result).getTypes();
this.result = new AmbiguousType(
types.toArray(new IEvaluatedType[types.size()]));
} else if (result instanceof AmbiguousType) {
this.result = (AmbiguousType) result;
}
return IGoal.NO_GOALS;
}
public Object produceResult() {
return result;
}
}