de.enough.polish.libraryprocessor.ImportLibraryProcessor.java Source code

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Here is the source code for de.enough.polish.libraryprocessor.ImportLibraryProcessor.java

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/*
 * Created on Feb 4, 2009 at 2:55:57 PM.
 * 
 * Copyright (c) 2009 Robert Virkus / Enough Software
 *
 * This file is part of J2ME Polish.
 *
 * J2ME Polish 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 of the License, or
 * (at your option) any later version.
 * 
 * J2ME Polish 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 J2ME Polish; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 * Commercial licenses are also available, please
 * refer to the accompanying LICENSE.txt or visit
 * http://www.j2mepolish.org for details.
 */
package de.enough.polish.libraryprocessor;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Locale;

import org.apache.tools.ant.BuildException;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.tree.ClassNode;

import de.enough.bytecode.ASMClassLoader;
import de.enough.bytecode.ClassHelper;
import de.enough.bytecode.DirClassLoader;
import de.enough.polish.Device;
import de.enough.polish.Environment;
import de.enough.polish.postcompile.renaming.ClassRenamingClassVisitor;
import de.enough.polish.postcompile.renaming.ClassRenamingHelper;

/**
 * <p>Exchanges import statements in class files of binary libraries</p>
 *
 * <p>Copyright Enough Software 2009</p>
 * @author Robert Virkus, j2mepolish@enough.de
 */
public abstract class ImportLibraryProcessor extends LibraryProcessor {

    protected abstract void addImportConversions(ImportConversionMap conversions, Device device, Locale locale,
            Environment env);

    /* (non-Javadoc)
     * @see de.enough.polish.libraryprocessor.LibraryProcessor#processLibrary(java.io.File, java.lang.String[], de.enough.polish.Device, java.util.Locale, de.enough.polish.Environment)
     */
    public void processLibrary(File baseDir, String[] relativeClassPaths, Device device, Locale locale,
            Environment env) throws IOException {
        //boolean isSlash = File.separatorChar == '/';
        ImportConversionMap renamingMap = new ImportConversionMap();
        addImportConversions(renamingMap, device, locale, env);

        ArrayList classes = new ArrayList();
        for (int i = 0; i < relativeClassPaths.length; i++) {
            // Cut off file extension.
            String classPath = relativeClassPaths[i];
            String className = classPath.substring(0, classPath.length() - ".class".length());

            // Add class name to known classes.
            classes.add(className);
        }
        System.out.println("Converting imports in " + classes.size() + " classes from " + baseDir.getPath());

        // Create classloader for the classesDir.
        DirClassLoader loader = DirClassLoader.createClassLoader(baseDir);

        ASMClassLoader asmLoader = new ASMClassLoader(loader);
        Iterator classesIt = classes.iterator();

        while (classesIt.hasNext()) {
            String className = (String) classesIt.next();

            try {
                ClassNode classNode = asmLoader.loadClass(className);
                ClassWriter writer = new ClassWriter(0);
                ClassRenamingClassVisitor visitor = new ClassRenamingClassVisitor(writer, renamingMap);
                classNode.accept(visitor);

                writeClass(baseDir, className, writer.toByteArray(), renamingMap);
            } catch (ClassNotFoundException e) {
                System.out.println("Error loading class " + className);
            } catch (IOException e) {
                throw new BuildException(e);
            } catch (Exception e) {
                System.out.println("Error loading class " + className + ": " + e.toString());
                e.printStackTrace();
                throw new IOException(e.toString());
            }
        }
    }

    protected void writeClass(File classesDir, String className, byte[] byteArray, ImportConversionMap renamingMap)
            throws IOException {
        String tmpClassName = className.replace(File.separatorChar, '/');
        String newClassName = ClassRenamingHelper.doRenaming(tmpClassName, renamingMap);
        newClassName = newClassName.replace('/', File.separatorChar);

        // Write class file.
        ClassHelper.writeClass(classesDir, newClassName, byteArray);

        if (!className.equals(newClassName)) {
            new File(classesDir, className + ".class").delete();
        }
    }

}