Package ptolemy.copernicus.kernel

Source Code of ptolemy.copernicus.kernel.ClassWriter

/* A transformer that writes class files.

Copyright (c) 2001-2006 The Regents of the University of California.
All rights reserved.
Permission is hereby granted, without written agreement and without
license or royalty fees, to use, copy, modify, and distribute this
software and its documentation for any purpose, provided that the above
copyright notice and the following two paragraphs appear in all copies
of this software.

IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.

THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
ENHANCEMENTS, OR MODIFICATIONS.

PT_COPYRIGHT_VERSION_2
COPYRIGHTENDKEY
*/
package ptolemy.copernicus.kernel;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.Map;

import soot.HasPhaseOptions;
import soot.PhaseOptions;
import soot.Scene;
import soot.SceneTransformer;
import soot.SootClass;
import soot.util.JasminOutputStream;

//////////////////////////////////////////////////////////////////////////
//// ClassWriter

/**
Write all of the application classes out to class files.  Jasmin files
for the classes will be created in a temporary directory and then
compiled into bytecode using the Jasmin assembler.  The output
directory is specified using the outDir parameter.  The class files
will be placed in the appropriate subdirectory of that directory
according to their package name.

@author Stephen Neuendorffer
@version $Id: ClassWriter.java,v 1.35 2006/10/25 00:17:26 cxh Exp $
@since Ptolemy II 2.0
@Pt.ProposedRating Red (cxh)
@Pt.AcceptedRating Red (cxh)
*/
public class ClassWriter extends SceneTransformer implements HasPhaseOptions {
    private static ClassWriter instance = new ClassWriter();

    private ClassWriter() {
    }

    public static ClassWriter v() {
        return instance;
    }

    public String getPhaseName() {
        return "";
    }

    public String getDefaultOptions() {
        return "";
    }

    public String getDeclaredOptions() {
        return "debug outDir";
    }

    /** Write out the class file.
     *  This transform can be used to take snapshots, and is
     *  usually called in conjunction with JimpleWriter inside addTransforms():
     *  <pre>
     *   Scene.v().getPack("wjtp").add(new Transform("wjtp.snapshot1",
     *           ClassWriter.v()));
     *   Scene.v().getPack("wjtp").add(new Transform("wjtp.snapshot1",
     *           JimpleWriter.v()));
     *  </pre>
     *  Sample option arguments:
     *        <code>-p wjtp.snapshot1 outDir:jimple1</code>
     *
     *  @see JimpleWriter
     *  @param phaseName The name of the phase, for example
     *  <code>wjtp.snapshot1</code>.
     *  @param options The options Map.  This method uses the
     *  <code>outDir</code> option to specify where the .class
     *  file should be written
     */
    protected void internalTransform(String phaseName, Map options) {
        System.out.println("ClassWriter.internalTransform(" + phaseName + ", "
                + options + ")");

        String outDir = PhaseOptions.getString(options, "outDir");

        if (!outDir.equals("")) {
            File outDirFile = new File(outDir);

            if (!outDirFile.isDirectory()) {
                outDirFile.mkdirs();
            }
        }

        for (Iterator classes = Scene.v().getApplicationClasses().iterator(); classes
                .hasNext();) {
            SootClass theClass = (SootClass) classes.next();

            try {
                _write(theClass, outDir);
            } catch (Exception ex) {
                // If we get an IOException, we might not have any idea
                // of which directory was problematic
                throw new RuntimeException("Creating class file for '"
                        + theClass + "' in directory '" + outDir + "' failed",
                        ex);
            }
        }
    }

    private void _write(SootClass cl, String outputDir) {
        String outputDirWithSep = "";

        if (!outputDir.equals("")) {
            outputDirWithSep = outputDir + System.getProperty("file.separator");
        }

        try {
            File tempFile = new File(outputDirWithSep
                    + cl.getName()
                            .replace(
                                    '.',
                                    System.getProperty("file.separator")
                                            .toCharArray()[0]) + ".class");

            _create(tempFile.getAbsoluteFile());

            OutputStream streamOut = new JasminOutputStream(
                    new FileOutputStream(tempFile));

            PrintWriter writerOut = new PrintWriter(new OutputStreamWriter(
                    streamOut));

            if (cl.containsBafBody()) {
                new soot.baf.JasminClass(cl).print(writerOut);
            } else {
                new soot.jimple.JasminClass(cl).print(writerOut);
            }

            writerOut.flush();
            streamOut.close();

        } catch (IOException e) {
            e.printStackTrace();
            throw new RuntimeException("Could not produce new classfile! (" + e
                    + ")");
        }
    }

    private void _create(File file) throws IOException {
        file.getParentFile().mkdirs();
        file.createNewFile();
    }
}
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