/*
 * Copyright 2014 Takao Nakaguchi
 *
 * 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 org.trie4j.tail.index;

import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;

public class ArrayTailIndex
implements Externalizable, TailIndex{
	public ArrayTailIndex() {
	}

	public ArrayTailIndex(int[] indexes) {
		this.indexes = indexes;
	}

	@Override
	public int size() {
		return indexes.length;
	}

	public int[] getIndexes() {
		return indexes;
	}

	@Override
	public int get(int nodeId) {
		return indexes[nodeId];
	}

	@Override
	public void readExternal(ObjectInput in)
	throws ClassNotFoundException, IOException{
		indexes = (int[])in.readObject();
	}

	@Override
	public void writeExternal(ObjectOutput out) throws IOException {
		out.writeObject(indexes);
	}

	private int[] indexes = new int[]{};
}