Java InputStream to Byte Array loadByteCode(String name, final InputStream is)

Description

Load bytecode from a stream

License

Open Source License

Parameter

Parameter	Description
name	the class name
is	the input stream

Return

the byte code

Declaration

public static final byte[] loadByteCode(String name, final InputStream is) 

Method Source Code

//package com.java2s;
/*/*from w ww  .j  a  va2  s  . com*/
 * JBoss, Home of Professional Open Source.
 * Copyright 2007, Red Hat Middleware LLC, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class Main {
    /**
     * Load bytecode from a stream
     * 
     * @param name the class name
     * @param is the input stream
     * @return the byte code
     */
    public static final byte[] loadByteCode(String name, final InputStream is) {
        try {
            return readBytes(is);
        } catch (IOException e) {
            throw new RuntimeException("Unable to load class byte code " + name, e);
        } finally {
            try {
                is.close();
            } catch (IOException e) {
                // pointless
            }
        }
    }

    /**
     * Read bytes.
     * Doesn't close inputstream.
     *
     * @param is the input stream
     * @return the bytes
     * @throws IOException for any error
     * @throws IllegalArgumentException for null is parameter
     */
    protected static final byte[] readBytes(final InputStream is) throws IOException {
        if (is == null)
            throw new IllegalArgumentException("Null input stream.");

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        byte[] tmp = new byte[1024];
        int read;
        while ((read = is.read(tmp)) >= 0) {
            baos.write(tmp, 0, read);
        }
        return baos.toByteArray();
    }
}

Related

1. inputStreamToBytes(final InputStream ins)
2. inputStreamToBytes(InputStream in)
3. inputStreamToBytes(InputStream in)
4. inputStreamToBytes(InputStream in)
5. inputStreamToBytes(InputStream is)