/*
 * 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.util;

import java.io.Serializable;
import java.util.Arrays;

public class IntArray
implements Serializable{
	public IntArray(){
		this.elements = new int[]{};
	}

	public IntArray(int initialCapacity){
		this.elements = new int[initialCapacity];
	}

	public IntArray(int[] elements, int size){
		this.size = size;
		this.elements = Arrays.copyOf(elements, size);
	}

	public int size(){
		return size;
	}

	public void trimToSize(){
		elements = Arrays.copyOf(elements, size);
	}

	public int[] getElements() {
		return elements;
	}

	public int get(int index){
		return elements[index];
	}

	public void add(int value){
		if(size == elements.length){
			elements = Arrays.copyOf(elements, (int)(size * 1.2 + 1));
		}
		elements[size] = value;
		size++;
	}
	
	public void set(int index, int value){
		if(index >= elements.length){
			elements = Arrays.copyOf(elements, Math.max((int)(elements.length * 1.2), index + 1));
		}
		elements[index] = value;
		size = Math.max(size, index + 1);
	}

	private int[] elements;
	private int size;
	private static final long serialVersionUID = 5484622364177160367L;
}