/*
* Copyright (c) 2012 Sam Harwell, Tunnel Vision Laboratories LLC
* All rights reserved.
*
* The source code of this document is proprietary work, and is not licensed for
* distribution. For information about licensing, contact Sam Harwell at:
* sam@tunnelvisionlabs.com
*/
package org.antlr.works.editor.grammar.codemodel.impl;
import java.util.ArrayList;
import java.util.Collection;
/**
*
* @author Sam Harwell
*/
public class FreezableArrayList<E> extends ArrayList<E> {
private boolean frozen;
public boolean isFrozen() {
return frozen;
}
public void freeze() {
frozen = true;
}
@Override
public E set(int index, E element) {
ensureModifiable();
return super.set(index, element);
}
@Override
public boolean add(E e) {
ensureModifiable();
return super.add(e);
}
@Override
public void add(int index, E element) {
ensureModifiable();
super.add(index, element);
}
@Override
public boolean remove(Object o) {
ensureModifiable();
return super.remove(o);
}
@Override
public void clear() {
ensureModifiable();
super.clear();
}
@Override
public boolean addAll(Collection<? extends E> c) {
ensureModifiable();
return super.addAll(c);
}
@Override
public boolean addAll(int index, Collection<? extends E> c) {
ensureModifiable();
return super.addAll(index, c);
}
@Override
protected void removeRange(int fromIndex, int toIndex) {
ensureModifiable();
super.removeRange(fromIndex, toIndex);
}
protected void ensureModifiable() {
if (isFrozen()) {
throw new IllegalStateException("The collection is frozen.");
}
}
}