net.sourceforge.floggy.persistence.pool.DirectoryOutputPool.java Source code

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Here is the source code for net.sourceforge.floggy.persistence.pool.DirectoryOutputPool.java

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/**
 * Copyright (c) 2006-2011 Floggy Open Source Group. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.sourceforge.floggy.persistence.pool;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import java.net.URL;

import javassist.CannotCompileException;
import javassist.CtClass;
import javassist.NotFoundException;

import org.apache.commons.io.IOUtils;

/**
 * DOCUMENT ME!
 *
 * @author <a href="mailto:thiago.moreira@floggy.org">Thiago Moreira</a>
 * @version $Revision$
  */
public class DirectoryOutputPool implements OutputPool {
    /**
     * DOCUMENT ME!
     */
    protected File directory;

    /**
     * Creates a new DirectoryOutputPool object.
     *
     * @param directory DOCUMENT ME!
     */
    public DirectoryOutputPool(File directory) {
        this.directory = directory;

        if ((this.directory != null) && !this.directory.exists()) {
            this.directory.mkdirs();
        }
    }

    /**
     * DOCUMENT ME!
    *
    * @param ctClass DOCUMENT ME!
    *
    * @throws NotFoundException DOCUMENT ME!
    * @throws IOException DOCUMENT ME!
    * @throws CannotCompileException DOCUMENT ME!
    */
    public void addClass(CtClass ctClass) throws NotFoundException, IOException, CannotCompileException {
        File classFile = this.getOutputFile(ctClass);
        classFile.getParentFile().mkdirs();

        if (classFile.exists()) {
            classFile.delete();
        }

        write(new ByteArrayInputStream(ctClass.toBytecode()), classFile);
    }

    /**
     * DOCUMENT ME!
    *
    * @param fileURL DOCUMENT ME!
    * @param fileName DOCUMENT ME!
    *
    * @throws IOException DOCUMENT ME!
    */
    public void addFile(URL fileURL, String fileName) throws IOException {
        addResource(fileURL.openStream(), fileName);
    }

    /**
     * DOCUMENT ME!
    *
    * @param resourceStream DOCUMENT ME!
    * @param fileName DOCUMENT ME!
    *
    * @throws IOException DOCUMENT ME!
    */
    public void addResource(InputStream resourceStream, String fileName) throws IOException {
        File temp;
        int lastIndex = fileName.lastIndexOf(File.separatorChar);

        if (lastIndex == -1) {
            temp = directory;
        } else {
            temp = new File(directory, fileName.substring(0, lastIndex));
        }

        if (!temp.exists()) {
            temp.mkdirs();
        }

        write(resourceStream, new File(temp, fileName.substring(lastIndex + 1)));
    }

    /**
     * DOCUMENT ME!
    */
    public void finish() {
    }

    /**
     * DOCUMENT ME!
    *
    * @param ctClass DOCUMENT ME!
    *
    * @return DOCUMENT ME!
    */
    protected File getOutputFile(CtClass ctClass) {
        File outputFile = new File(directory.getPath() + File.separatorChar
                + ctClass.getName().replace('.', File.separatorChar) + ".class");

        return outputFile;
    }

    private void write(InputStream in, File file) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        IOUtils.copy(in, baos);
        baos.flush();

        ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
        FileOutputStream out = new FileOutputStream(file);
        IOUtils.copy(bais, out);
        out.flush();
        out.close();
        in.close();
    }
}