/*
* 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 java.util.Collection;
import java.util.LinkedList;
/**
* @author Daniel Bechler
*/
public abstract class AbstractFilteringVisitor implements DiffNode.Visitor
{
private final Collection<DiffNode> matches = new LinkedList<DiffNode>();
public void node(final DiffNode node, final Visit visit)
{
if (accept(node))
{
onAccept(node, visit);
}
else
{
onDismiss(node, visit);
}
}
protected abstract boolean accept(final DiffNode node);
protected void onAccept(final DiffNode node, final Visit visit)
{
matches.add(node);
}
protected void onDismiss(final DiffNode node, final Visit visit)
{
}
public Collection<DiffNode> getMatches()
{
return matches;
}
}