tikhomirov@288: /*
tikhomirov@545:  * Copyright (c) 2011-2013 TMate Software Ltd
tikhomirov@288:  *  
tikhomirov@288:  * This program is free software; you can redistribute it and/or modify
tikhomirov@288:  * it under the terms of the GNU General Public License as published by
tikhomirov@288:  * the Free Software Foundation; version 2 of the License.
tikhomirov@288:  *
tikhomirov@288:  * This program is distributed in the hope that it will be useful,
tikhomirov@288:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
tikhomirov@288:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
tikhomirov@288:  * GNU General Public License for more details.
tikhomirov@288:  *
tikhomirov@288:  * For information on how to redistribute this software under
tikhomirov@288:  * the terms of a license other than GNU General Public License
tikhomirov@288:  * contact TMate Software at support@hg4j.com
tikhomirov@288:  */
tikhomirov@288: package org.tmatesoft.hg.internal;
tikhomirov@288: 
tikhomirov@288: /**
tikhomirov@328:  * Vector of primitive values
tikhomirov@328:  * 
tikhomirov@288:  * @author Artem Tikhomirov
tikhomirov@288:  * @author TMate Software Ltd.
tikhomirov@288:  */
tikhomirov@328: public class IntVector {
tikhomirov@288: 	
tikhomirov@288: 	private int[] data;
tikhomirov@288: 	private final int increment;
tikhomirov@288: 	private int count;
tikhomirov@288: 
tikhomirov@288: 
tikhomirov@288: 	public IntVector() {
tikhomirov@288: 		this(16, -1);
tikhomirov@288: 	}
tikhomirov@288: 
tikhomirov@288: 	// increment == -1: grow by power of two.
tikhomirov@288: 	// increment == 0: no resize (Exception will be thrown on attempt to add past capacity)
tikhomirov@288: 	public IntVector(int initialCapacity, int increment) {
tikhomirov@288: 		data = new int[initialCapacity];
tikhomirov@288: 		this.increment = increment; 
tikhomirov@288: 	}
tikhomirov@288: 
tikhomirov@288: 	public void add(int v) {
tikhomirov@288: 		if (count == data.length) {
tikhomirov@288: 			grow();
tikhomirov@288: 		}
tikhomirov@288: 		data[count++] = v;
tikhomirov@288: 	}
tikhomirov@288: 	
tikhomirov@288: 	public int get(int i) {
tikhomirov@288: 		if (i < 0 || i >= count) {
tikhomirov@288: 			throw new IndexOutOfBoundsException(String.format("Index: %d, size: %d", i, count));
tikhomirov@288: 		}
tikhomirov@288: 		return data[i];
tikhomirov@288: 	}
tikhomirov@288: 	
tikhomirov@545: 	public void set(int i, int v) {
tikhomirov@545: 		if (i < 0 || i >= count) {
tikhomirov@545: 			throw new IndexOutOfBoundsException(String.format("Index: %d, size: %d", i, count));
tikhomirov@545: 		}
tikhomirov@545: 		data[i] = v;
tikhomirov@545: 	}
tikhomirov@545: 	
tikhomirov@288: 	public int size() {
tikhomirov@288: 		return count;
tikhomirov@288: 	}
tikhomirov@329: 	
tikhomirov@545: 	public boolean isEmpty() {
tikhomirov@545: 		return count == 0;
tikhomirov@545: 	}
tikhomirov@545: 	
tikhomirov@329: 	public void clear() {
tikhomirov@329: 		count = 0;
tikhomirov@329: 	}
tikhomirov@329: 	
tikhomirov@329: 	public void trimToSize() {
tikhomirov@329: 		data = toArray(true);
tikhomirov@329: 	}
tikhomirov@329: 
tikhomirov@288: 
tikhomirov@288: 	public int[] toArray() {
tikhomirov@288: 		int[] rv = new int[count];
tikhomirov@288: 		System.arraycopy(data, 0, rv, 0, count);
tikhomirov@288: 		return rv;
tikhomirov@288: 	}
tikhomirov@288: 
tikhomirov@288: 	/**
tikhomirov@288: 	 * Use only when this instance won't be used any longer
tikhomirov@288: 	 */
tikhomirov@288: 	@Experimental
tikhomirov@288: 	int[] toArray(boolean internalIfSizeMatchCapacity) {
tikhomirov@288: 		if (count == data.length) {
tikhomirov@288: 			return data;
tikhomirov@288: 		}
tikhomirov@288: 		return toArray();
tikhomirov@288: 	}
tikhomirov@288: 
tikhomirov@288: 	private void grow() {
tikhomirov@288: 		if (increment == 0) {
tikhomirov@329: 			throw new UnsupportedOperationException("This vector is not allowed to expand");
tikhomirov@288: 		}
tikhomirov@288: 		int newCapacity = increment < 0 ? data.length << 1 : data.length + increment;
tikhomirov@288: 		assert newCapacity > 0 && newCapacity != data.length : newCapacity;
tikhomirov@288: 		int[] newData = new int[newCapacity];
tikhomirov@288: 		System.arraycopy(data, 0, newData, 0, count);
tikhomirov@288: 		data = newData;
tikhomirov@288: 	}
tikhomirov@549: 	
tikhomirov@549: 	@Override
tikhomirov@549: 	public String toString() {
tikhomirov@549: 		return String.format("%s[%d]", IntVector.class.getSimpleName(), size());
tikhomirov@549: 	}
tikhomirov@288: }