DebugInputStream.java Source code

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Here is the source code for DebugInputStream.java

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/****************************************************************
 * Licensed to the Apache Software Foundation (ASF) under one   *
 * or more contributor license agreements.  See the NOTICE file *
 * distributed with this work for additional information        *
 * regarding copyright ownership.  The ASF licenses this file   *
 * to you 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.                                           *
 ****************************************************************/

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

/**
 * Reads data off a stream, printing every byte read to System.err.
 */
public class DebugInputStream extends InputStream {

    /**
     * The input stream being wrapped
     */
    InputStream in = null;

    /**
     * Constructor that takes an InputStream to be wrapped.
     *
     * @param in the InputStream to be wrapped
     */
    public DebugInputStream(InputStream in) {
        this.in = in;
    }

    /**
     * Read a byte off the stream
     *
     * @return the byte read off the stream
     * @throws IOException if an exception is encountered when reading
     */
    public int read() throws IOException {
        int b = in.read();
        System.err.write(b);
        return b;
    }

    /**
     * Close the stream
     *
     * @throws IOException if an exception is encountered when closing
     */
    public void close() throws IOException {
        in.close();
    }
}