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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;

import java.util.ArrayList;

/**
 * 
 * @since v4.2
 * @deprecated The stored proc feature and API are experimental, and subject to change in a future release.
 */
public class AGEncoder {

	static char codeToChar[] =
	    {
	       'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 
	       'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 
	       'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 
	       'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', 
	       '4', '5', '6', '7', '8', '9', '*', '+'
	    };
	 
	 public static String encode(byte[] arr) {
		 ArrayList resx = new ArrayList();
		 
		 int state = 0;
		 
		 int rem = 0;
		 
		 for (byte b : arr) {
			 switch (state) {
			 case 0:
				 resx.add(codeToChar[b & 0x3f]); 
				 rem = (b >> 6) & 0x3;
				 break;
			 case 1:
				 resx.add(codeToChar[((b & 0xf) << 2) | rem]);                  
				 rem = (b >> 4) & 0xf;
				 break;
			 case 2:
				 resx.add(codeToChar[((b & 0x3) << 4) | rem]);
				 resx.add(codeToChar[((b >> 2) & 0x3f)]);    
			 }
			 
			 state = (state + 1) % 3;
			 
		 }
		 
		 if (state != 0) {
			 resx.add(codeToChar[rem]);
		 }
		 
		 // there must be an easier way to turn an ArrayList into a String.
		 char[] retstr = new char[resx.size()];
		 int index = 0;
		 for (Character c : resx) {
			 retstr[index++] = c;            
		 }
		 return new String(retstr);
		 
	 }
	 
}