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/**
 * 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.ctakes.ytex.kernel.tree;

import java.io.Serializable;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

public class Node implements Serializable {
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	@Override
	public String toString() {
		return "Node [type=" + type + ", value=" + value + "]";
	}

	private String type;
	private Map value;
	private List children = new LinkedList();

	/**
	 * Caching the norm externally, e.g. in EHCache involves too much additional
	 * overhead. Therefore, save the norm in this object. This shouldn't cause
	 * problems in a multi-threaded environment, as long as the kernel is the
	 * same - the value of the norm will be the same across evaluations.
	 */
	private transient Double norm;

	public Double getNorm() {
		return norm;
	}

	public void setNorm(Double norm) {
		this.norm = norm;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((type == null) ? 0 : type.hashCode());
		result = prime * result + ((value == null) ? 0 : value.hashCode());
		return result;
	}

	public String getType() {
		return type;
	}

	public void setType(String type) {
		this.type = type;
	}

	public Map getValue() {
		return value;
	}

	public void setValue(Map value) {
		this.value = value;
	}

	public List getChildren() {
		return children;
	}

	public void setChildren(List children) {
		this.children = children;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Node other = (Node) obj;
		if (type == null) {
			if (other.type != null)
				return false;
		} else if (!type.equals(other.type))
			return false;
		if (value == null) {
			if (other.value != null)
				return false;
		} else if (!value.equals(other.value))
			return false;
		return true;
	}

}