| /* |
| * Copyright (c) 2002, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package nsk.sysdict.share; |
| |
| import java.io.*; |
| |
| /** |
| * This tools generates a chain of classes. |
| * For more details, use: |
| * <pre> |
| * java ChainGen -help |
| * </pre> |
| */ |
| public class ChainGen { |
| private static final int FATS_HEIGHT = 5; |
| private static final int FATS_WEIGHT = 10000; |
| private static final int LEANS_HEIGHT = 50; |
| private static final int LEANS_WEIGHT = 1; |
| |
| private static void explain(Object x) { |
| System.err.println("# " + x); |
| } |
| |
| public static void main(String args[]) { |
| if (args.length < 1 || args[0].toLowerCase().startsWith("-h")) { |
| explain("Generates a chain classes extending each other."); |
| explain(""); |
| explain("Use:"); |
| explain(" java ChainGen $NAME $HEIGHT $WEIGHT"); |
| explain("Or:"); |
| explain(" java ChainGen \"fats\""); |
| explain("Or:"); |
| explain(" java ChainGen \"leans\""); |
| explain(""); |
| explain("This creates:"); |
| explain(" ${NAME}Info.java class displaying HEIGHT and WEIGHT."); |
| explain(" ${NAME}XXXXXX.java defining classes chain."); |
| explain(""); |
| explain("Here:"); |
| explain(" HEIGHT and WEIGHT must be positive integers."); |
| explain(" Defaults for \"fats\": HEIGHT is " + FATS_HEIGHT |
| + ", WEIGHT is " + FATS_WEIGHT +"."); |
| explain(" Defaults for \"leans\": HEIGHT is " + LEANS_HEIGHT |
| + ", WEIGHT is " + LEANS_WEIGHT +"."); |
| System.exit(1); |
| }; |
| String name; |
| int height, weight; |
| if (args[0].toLowerCase().equals("fats")) { |
| name = "Fats"; |
| height = FATS_HEIGHT; |
| weight = FATS_WEIGHT; |
| } else if (args[0].toLowerCase().equals("leans")) { |
| name = "Leans"; |
| height = LEANS_HEIGHT; |
| weight = LEANS_WEIGHT; |
| } else { |
| name = args[0]; |
| height = Integer.parseInt(args[1]); |
| weight = Integer.parseInt(args[2]); |
| }; |
| try { |
| doit(name, height, weight); |
| } catch (IOException exception) { |
| exception.printStackTrace(System.err); |
| System.exit(1); |
| } |
| } |
| |
| private static void doit(String name, int height, int weight) |
| throws FileNotFoundException |
| { |
| // Constants definition: |
| PrintStream info = new PrintStream( |
| new FileOutputStream(new File(name + "Info.java")) |
| ); |
| info.println("// This file is generated by: ChainGen.java"); |
| info.println("package nsk.sysdict.share;"); |
| info.println("public class " + name + "Info {"); |
| info.println(" public static final int HEIGHT = " + height + ";"); |
| info.println(" private static final int WEIGHT = " + weight + ";"); |
| info.println(" public static final String rootName = \"" + name + "\";"); |
| info.println(" public static final String[] nodeNames = new String[] {"); |
| // Generate a series of fat classes: |
| for (int index=0; index<height; index++) { |
| String suffix = digits(index,6); |
| String className = name + suffix; |
| info.println(" \"" + suffix + "\"" |
| + (index+1<height? "," : "")); |
| PrintStream chain = new PrintStream( |
| new FileOutputStream(new File(className + ".java")) |
| ); |
| chain.println("// This file is generated by: ChainGen.java"); |
| chain.println("package nsk.sysdict.share;"); |
| chain.println("class " + className |
| + (index>0? " extends " + name + digits(index-1,6): "") |
| + " {"); |
| for (int w=0; w<weight; w++) { |
| String fieldName = "fill_" + className + "_" + digits(w,6); |
| chain.println(" static long " + fieldName + ";"); |
| } |
| chain.println("}"); |
| chain.close(); |
| }; |
| // |
| info.println(" };"); |
| info.println("}"); |
| info.close(); |
| } |
| |
| /** |
| * Convert <tt>x</tt> to <tt>n</tt>-digits string. |
| */ |
| private static String digits(int x, int n) { |
| String s = "" + x; |
| while (s.length() < n) |
| s = "0" + s; |
| return s; |
| } |
| } |