1 /* Print.java - abstract base class for printing classes
2 Copyright (C) 2006 Free Software Foundation, Inc.
4 This file is part of GNU Classpath.
6 GNU Classpath is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Classpath is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Classpath; see the file COPYING. If not, write to the
18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library. Thus, the terms and
23 conditions of the GNU General Public License cover the whole
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
29 modules, and to copy and distribute the resulting executable under
30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
32 module. An independent module is a module which is not derived from
33 or based on this library. If you modify this library, you may extend
34 this exception to your version of the library, but you are not
35 obligated to do so. If you do not wish to do so, delete this
36 exception statement from your version. */
39 package gnu.classpath.tools.javah;
42 import java.io.FileNotFoundException;
43 import java.io.FileOutputStream;
44 import java.io.IOException;
45 import java.io.PrintStream;
47 public abstract class Printer
49 protected Main classpath;
52 * The {@link File} object that denotes either a directory (when the
53 * <code>-d</code> option was used), or a file (when the <code>-o</code>
54 * option was used) on the command line.
56 protected File outputFileObject;
59 * Set to <code>true</code> if the field <code>outputFileObject</code> denotes
60 * a directory; i.e. for each input class file, one JNI header file will be
61 * generated in that directory.
63 * Set to <code>false</code> if the field <code>outputFileObject</code>
64 * denotes a file; i.e. all generated headers will be written to that file.
66 protected boolean isDirectory;
69 * Set to <code>true</code> if the output file(s) should always be written.
71 * When set to <code>false</code>, the contents of the header/stub are only
72 * written to the file if it does not already exist.
74 protected boolean force;
77 * Set to <code>true</code> if all output is directed to one file, and the
78 * common preamble text has already been generated.
80 protected boolean wrotePreamble;
82 protected Printer(Main classpath, File outFile, boolean isDir, boolean force)
84 this.classpath = classpath;
86 throw new IllegalArgumentException("File argument MUST NOT be null");
87 outputFileObject = outFile;
91 File parent = outputFileObject.getParentFile();
98 public abstract void printClass(ClassWrapper klass) throws IOException;
100 protected abstract void writePreambleImpl(PrintStream ps);
102 protected abstract PrintStream getPrintStreamImpl(FileOutputStream fos,
105 protected PrintStream getPrintStream(String fullName, ClassWrapper klass)
106 throws FileNotFoundException
109 FileOutputStream fos;
112 File outFile = new File(outputFileObject, fullName);
113 if (outFile.exists() && ! force)
115 File parent = outFile.getParentFile();
118 fos = new FileOutputStream(outFile);
119 result = getPrintStreamImpl(fos, klass);
120 writePreamble(result);
124 // the first time we open this file, wrotePreamble is false
125 fos = new FileOutputStream(outputFileObject, wrotePreamble);
126 result = getPrintStreamImpl(fos, klass);
128 writePreamble(result);
133 protected void writePreamble(PrintStream out)
135 writePreambleImpl(out);
136 wrotePreamble = true;