/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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.apache.xerces.util; import java.io.OutputStream; import java.io.PrintWriter; /** * This class can be used to generate the code for * an efficient initialization for a given array. * * @author Michael Glavassevich, IBM * * @version $Id$ */ public class ArrayFillingCodeGenerator { /** *
Generates code for an efficient initialization for * a given byte array.
* * @param arrayName the name of the array to be generated * @param array the array for which code will be generated * @param out the stream where the code will be written */ public static void generateByteArray(String arrayName, byte[] array, OutputStream out) { PrintWriter writer = new PrintWriter(out); int cursor = 0; int i; byte last = 0; for (i = 0; i < array.length; ++i) { if (last == array[i]) { continue; } if (i - cursor > 1 && last != (byte) 0) { writer.print("Arrays.fill(" + arrayName + ", " + cursor + ", " + i + ", (byte) " + last + " );"); writer.println(" // Fill " + (i - cursor) + " of value (byte) " + last); writer.flush(); } else if (i - cursor == 1 && array[cursor] != (byte) 0) { writer.println(arrayName + "[" + cursor + "] = " + array[cursor] + ";"); writer.flush(); } last = array[i]; cursor = i; } if (i - cursor > 1 && last != (byte) 0) { writer.print("Arrays.fill(" + arrayName + ", " + cursor + ", " + i + ", (byte) " + last + " );"); writer.println(" // Fill " + (i - cursor) + " of value (byte) " + last); writer.flush(); } else if (i - cursor == 1 && array[cursor] != (byte) 0) { writer.println(arrayName + "[" + cursor + "] = " + array[cursor] + ";"); writer.flush(); } writer.flush(); writer.close(); } }