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Java > Open Source Codes > net > sf > jasperreports > engine > design > JRJdk12Compiler


1 /*
2  * ============================================================================
3  * GNU Lesser General Public License
4  * ============================================================================
5  *
6  * JasperReports - Free Java report-generating library.
7  * Copyright (C) 2001-2006 JasperSoft Corporation http://www.jaspersoft.com
8  *
9  * This library is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
22  *
23  * JasperSoft Corporation
24  * 303 Second Street, Suite 450 North
25  * San Francisco, CA 94107
26  * http://www.jaspersoft.com
27  */
28 package net.sf.jasperreports.engine.design;
29
30 import java.io.ByteArrayOutputStream JavaDoc;
31 import java.io.File JavaDoc;
32 import java.io.OutputStream JavaDoc;
33 import java.lang.reflect.Constructor JavaDoc;
34 import java.lang.reflect.Method JavaDoc;
35
36 import net.sf.jasperreports.engine.JRException;
37 import net.sf.jasperreports.engine.util.JRClassLoader;
38
39
40 /**
41  * @author Teodor Danciu (teodord@users.sourceforge.net)
42  * @version $Id: JRJdk12Compiler.java 1229 2006-04-19 13:27:35 +0300 (Wed, 19 Apr 2006) teodord $
43  */
44 public class JRJdk12Compiler extends JRAbstractMultiClassCompiler
45 {
46
47
48     /**
49      *
50      */
51     public String JavaDoc compileClasses(File JavaDoc[] sourceFiles, String JavaDoc classpath) throws JRException
52     {
53         String JavaDoc[] source = new String JavaDoc[sourceFiles.length + 2];
54         for (int i = 0; i < sourceFiles.length; i++)
55         {
56             source[i] = sourceFiles[i].getPath();
57         }
58         source[sourceFiles.length] = "-classpath";
59         source[sourceFiles.length + 1] = classpath;
60         
61         ByteArrayOutputStream JavaDoc baos = new ByteArrayOutputStream JavaDoc();
62
63         try
64         {
65             Class JavaDoc javacClass = JRClassLoader.loadClassForName("sun.tools.javac.Main");
66             Constructor JavaDoc constructor = javacClass.getConstructor(new Class JavaDoc[] {OutputStream JavaDoc.class, String JavaDoc.class});
67             Method JavaDoc compileMethod = javacClass.getMethod("compile", new Class JavaDoc[] {String JavaDoc[].class});
68             Object JavaDoc javac = constructor.newInstance(new Object JavaDoc[] {baos, source[0]});
69
70             compileMethod.invoke(javac, new Object JavaDoc[] {source});
71         }
72         catch (Exception JavaDoc e)
73         {
74             StringBuffer JavaDoc files = new StringBuffer JavaDoc();
75             for (int i = 0; i < sourceFiles.length; ++i)
76             {
77                 files.append(sourceFiles[i].getPath());
78                 files.append(' ');
79             }
80             throw new JRException("Error compiling report java source files : " + files, e);
81         }
82
83         if( baos.toString().indexOf("error") != -1 )
84         {
85             return baos.toString();
86         }
87         
88         return null;
89     }
90
91
92 }
93
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