StateFilteringVisitor.java

/*
 * Copyright 2014 Daniel Bechler
 *
 * 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 de.danielbechler.diff.node;

import de.danielbechler.util.Assert;

/**
 * @author Daniel Bechler
 */
public class StateFilteringVisitor extends AbstractFilteringVisitor
{
	private final DiffNode.State state;

	public StateFilteringVisitor(final DiffNode.State state)
	{
		Assert.notNull(state, "state");
		this.state = state;
	}

	@Override
	protected boolean accept(final DiffNode node)
	{
		return node.getState() == state;
	}

	@Override
	protected void onAccept(final DiffNode node, final Visit visit)
	{
		super.onAccept(node, visit);
		visit.dontGoDeeper();
	}

	@Override
	protected void onDismiss(final DiffNode node, final Visit visit)
	{
		super.onDismiss(node, visit);
		visit.dontGoDeeper();
	}
}