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/*
* 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;
}
}
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