eagle-core/eagle-query/eagle-entity-base/src/main/java/org/apache/eagle/log/entity/EntityUniq.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.eagle.log.entity;

import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;

/**
 * @since Sep 12, 2014
 */
public class EntityUniq {

    public Map<String, String> tags;
    public Long timestamp;
    public long createdTime; // for cache removal;

    public EntityUniq(Map<String, String> tags, long timestamp) {
        this.tags = new HashMap<String, String>(tags);
        this.timestamp = timestamp;
        this.createdTime = System.currentTimeMillis();
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof EntityUniq) {
            EntityUniq au = (EntityUniq)obj;
            if (tags.size() != au.tags.size()) {
                return false;
            }
            for (Entry<String, String> keyValue : au.tags.entrySet()) {
                boolean keyExist = tags.containsKey(keyValue.getKey());
                if (!keyExist || !tags.get(keyValue.getKey()).equals(keyValue.getValue())) {
                    return false;
                }
            }
            if (!timestamp.equals(au.timestamp)) {
                return false;
            }
            return true;
        }
        return false;
    }

    @Override
    public int hashCode() {
        int hashCode = 0;
        for (String value : tags.values()) {
            hashCode ^= value.hashCode();
        }
        return hashCode ^= timestamp.hashCode();
    }
}