
spoon.reflect.visitor.CtStackScanner Maven / Gradle / Ivy
/*
* Spoon - http://spoon.gforge.inria.fr/
* Copyright (C) 2006 INRIA Futurs
*
* This software is governed by the CeCILL-C License under French law and
* abiding by the rules of distribution of free software. You can use, modify
* and/or redistribute the software under the terms of the CeCILL-C license as
* circulated by CEA, CNRS and INRIA at http://www.cecill.info.
*
* This program 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 CeCILL-C License for more details.
*
* The fact that you are presently reading this means that you have had
* knowledge of the CeCILL-C license and that you accept its terms.
*/
package spoon.reflect.visitor;
import java.util.Stack;
import spoon.reflect.declaration.CtElement;
import spoon.reflect.reference.CtReference;
/**
* This class defines a scanner that maintains a scanning stack for contextual
* awareness.
*/
public class CtStackScanner extends CtScanner {
/**
* Default constructor.
*/
public CtStackScanner() {
}
/**
* The stack of elements.
*/
protected Stack elementStack = new Stack();
/**
* The stack of element references.
*/
protected Stack referenceStack = new Stack();
/**
* Pops the element.
*/
protected void exit(CtElement e) {
CtElement ret = elementStack.pop();
if (ret != e)
throw new RuntimeException("Unconsitant Stack");
super.exit(e);
}
/**
* Pops the element reference.
*/
protected void exitReference(CtReference e) {
CtReference ret = referenceStack.pop();
if (ret != e)
throw new RuntimeException("Unconsitant Stack");
super.exitReference(e);
}
/**
* Pushes the element.
*/
protected void enter(CtElement e) {
elementStack.push(e);
super.enter(e);
}
/**
* Pushes the element reference.
*/
protected void enterReference(CtReference e) {
referenceStack.push(e);
super.enterReference(e);
}
}
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