/**
 * 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 EqualsOp extends FilterOp {
    public boolean matches(LogEntry entry) throws FilterException {

	Object last = null;
	for (Arg a : args) {
	    Object v = a.getValue();
	    if (a.getType() == FilterOp.ArgType.SYMBOL) {
		String key = (String)a.getValue();
		v = entry.getAttribute(key);
	    }

	    if (last != null
		&& !last.equals(v)) {
		return false;
	    }
	    last = v;
	}

	return true;
    }
}    
