| /* Print.java - abstract base class for printing classes |
| Copyright (C) 2006, 2007 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.classpath.tools.javah; |
| |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.PrintStream; |
| |
| public abstract class Printer |
| { |
| protected Main classpath; |
| |
| /** |
| * The {@link File} object that denotes either a directory (when the |
| * <code>-d</code> option was used), or a file (when the <code>-o</code> |
| * option was used) on the command line. |
| */ |
| protected File outputFileObject; |
| |
| /** |
| * Set to <code>true</code> if the field <code>outputFileObject</code> denotes |
| * a directory; i.e. for each input class file, one JNI header file will be |
| * generated in that directory. |
| * <p> |
| * Set to <code>false</code> if the field <code>outputFileObject</code> |
| * denotes a file; i.e. all generated headers will be written to that file. |
| */ |
| protected boolean isDirectory; |
| |
| /** |
| * Set to <code>true</code> if the output file(s) should always be written. |
| * <p> |
| * When set to <code>false</code>, the contents of the header/stub are only |
| * written to the file if it does not already exist. |
| */ |
| protected boolean force; |
| |
| /** |
| * Set to <code>true</code> if all output is directed to one file, and the |
| * common preamble text has already been generated. |
| */ |
| protected boolean wrotePreamble; |
| |
| protected Printer(Main classpath, File outFile, boolean isDir, boolean force) |
| { |
| this.classpath = classpath; |
| if (outFile == null) |
| throw new IllegalArgumentException("File argument MUST NOT be null"); |
| outputFileObject = outFile; |
| isDirectory = isDir; |
| if (! isDirectory) |
| { |
| File parent = outputFileObject.getParentFile(); |
| if (parent != null) |
| parent.mkdirs(); |
| } |
| this.force = force; |
| } |
| |
| public abstract void printClass(File filename, ClassWrapper klass) |
| throws IOException; |
| |
| protected abstract void writePreambleImpl(PrintStream ps); |
| |
| protected abstract PrintStream getPrintStreamImpl(FileOutputStream fos, |
| ClassWrapper klass); |
| |
| protected PrintStream getPrintStream(String fullName, ClassWrapper klass) |
| throws FileNotFoundException |
| { |
| PrintStream result; |
| FileOutputStream fos; |
| if (isDirectory) |
| { |
| File outFile = new File(outputFileObject, fullName); |
| if (outFile.exists() && ! force) |
| return null; |
| File parent = outFile.getParentFile(); |
| if (parent != null) |
| parent.mkdirs(); |
| fos = new FileOutputStream(outFile); |
| result = getPrintStreamImpl(fos, klass); |
| writePreamble(result); |
| } |
| else |
| { |
| // the first time we open this file, wrotePreamble is false |
| fos = new FileOutputStream(outputFileObject, wrotePreamble); |
| result = getPrintStreamImpl(fos, klass); |
| if (! wrotePreamble) |
| writePreamble(result); |
| } |
| return result; |
| } |
| |
| protected void writePreamble(PrintStream out) |
| { |
| writePreambleImpl(out); |
| wrotePreamble = true; |
| } |
| } |