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Java client API for Franz AllegroGraph

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/******************************************************************************
 ** Copyright (c) 2008-2016 Franz Inc.
 ** All rights reserved. This program and the accompanying materials
 ** are made available under the terms of the Eclipse Public License v1.0
 ** which accompanies this distribution, and is available at
 ** http://www.eclipse.org/legal/epl-v10.html
 ******************************************************************************/

package com.franz.agraph.http.storedproc;

/**
 * useful operations on byte arrays
 */
class ByteArray {
	
	private byte[] data;
	private int wpos; // next index into which to write
	
	public ByteArray() {
		data = new byte[1024];
		wpos = 0;
	}
	
	public ByteArray(byte[] barr) {
		data = barr;
		wpos = data.length;
	}
	
	public void append(byte[] src, int max) {
		// add the given byte array up to max to the curret
		// byte array
		if (wpos + max >= data.length) {
			// need new data
			byte[] newdata = new byte[wpos + max + 2048];
			System.arraycopy(data, 0, newdata, 0, wpos);
			data = newdata;
		}
		
		System.arraycopy(src, 0, data, wpos, max);
		wpos += max;
	}
	
	void addbyte(byte b) {
		if (wpos + 1 >= data.length) {
			// need new data
			byte[] newdata = new byte[wpos + 2048];
			System.arraycopy(data, 0, newdata, 0, wpos);
			data = newdata;
		}
		data[wpos] = b;
		wpos++;
		
	}
	
	public byte[] extract() {
		// return a byte array with the contents of this object
		byte[] retobj = new byte[wpos];
		
		System.arraycopy(data, 0, retobj, 0, wpos);
		return retobj;
	}
	
}