XorOp.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.zookeeper.graph.filterops;

import org.apache.zookeeper.graph.LogEntry;
import org.apache.zookeeper.graph.FilterOp;
import org.apache.zookeeper.graph.FilterException;

public class XorOp extends FilterOp {
    public boolean matches(LogEntry entry) throws FilterException {
	int count = 0;
	for (FilterOp f : subOps) {
	    if (f.matches(entry)) {
		count++;
		if (count > 1) {
		    return false;
		}
	    }
	}
	if (count == 1) {
	    return true;
	}
	return false;
    }
}