/*******************************************************************************
* 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 org.eclipse.dltk.ast.expressions.Expression;
import org.eclipse.dltk.ast.references.TypeReference;
import org.eclipse.dltk.evaluation.types.SimpleType;
import org.eclipse.dltk.evaluation.types.UnknownType;
import org.eclipse.dltk.ti.GoalState;
import org.eclipse.dltk.ti.goals.ExpressionTypeGoal;
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.compiler.ast.nodes.StaticConstantAccess;
import org.eclipse.php.internal.core.typeinference.goals.ConstantDeclarationGoal;
public class StaticConstantAccessEvaluator extends GoalEvaluator {
private IEvaluatedType evaluatedType;
public StaticConstantAccessEvaluator(IGoal goal) {
super(goal);
}
public IGoal[] init() {
ExpressionTypeGoal typedGoal = (ExpressionTypeGoal) goal;
StaticConstantAccess expr = (StaticConstantAccess) typedGoal
.getExpression();
Expression dispatcher = expr.getDispatcher();
if (dispatcher instanceof TypeReference) {
TypeReference typeReference = (TypeReference) dispatcher;
return new IGoal[] { new ConstantDeclarationGoal(goal.getContext(),
expr.getConstant().getName(), typeReference.getName()) };
}
return IGoal.NO_GOALS;
}
public Object produceResult() {
return evaluatedType;
}
public IGoal[] subGoalDone(IGoal subgoal, Object result, GoalState state) {
if (state == GoalState.PRUNED || result == null
|| result == UnknownType.INSTANCE) {
evaluatedType = new SimpleType(SimpleType.TYPE_STRING);
} else {
evaluatedType = (IEvaluatedType) result;
}
return IGoal.NO_GOALS;
}
}