| /** |
| * |
| * Copyright 2006 The Apache Software Foundation |
| * |
| * 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 org.apache.geronimo.javamail.util; |
| |
| import java.io.FilterInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| import org.apache.geronimo.mail.util.QuotedPrintableEncoderStream; |
| |
| /** |
| * @version $Rev$ $Date$ |
| */ |
| public class TraceInputStream extends FilterInputStream { |
| // the current debug setting |
| protected boolean debug = false; |
| |
| // the target trace output stream. |
| protected OutputStream traceStream; |
| |
| /** |
| * Construct a debug trace stream. |
| * |
| * @param in |
| * The source input stream. |
| * @param traceStream |
| * The side trace stream to which trace data gets written. |
| * @param encode |
| * Indicates whether we wish the Trace data to be Q-P encoded. |
| */ |
| public TraceInputStream(InputStream in, OutputStream traceStream, boolean debug, boolean encode) { |
| super(in); |
| this.debug = debug; |
| if (encode) { |
| this.traceStream = new QuotedPrintableEncoderStream(traceStream); |
| } else { |
| this.traceStream = traceStream; |
| } |
| } |
| |
| /** |
| * Set the current setting of the debug trace stream debug flag. |
| * |
| * @param d |
| * The new debug flag settings. |
| */ |
| public void setDebug(boolean d) { |
| debug = d; |
| } |
| |
| /** |
| * Reads up to <code>len</code> bytes of data from this input stream into |
| * an array of bytes. This method blocks until some input is available. |
| * <p> |
| * This method simply performs <code>in.read(b, off, len)</code> and |
| * returns the result. |
| * |
| * @param b |
| * the buffer into which the data is read. |
| * @param off |
| * the start offset of the data. |
| * @param len |
| * the maximum number of bytes read. |
| * @return the total number of bytes read into the buffer, or |
| * <code>-1</code> if there is no more data because the end of the |
| * stream has been reached. |
| * @exception IOException |
| * if an I/O error occurs. |
| * @see java.io.FilterInputStream#in |
| */ |
| public int read(byte b[], int off, int len) throws IOException { |
| int count = in.read(b, off, len); |
| if (debug && count > 0) { |
| traceStream.write(b, off, count); |
| } |
| return count; |
| } |
| |
| /** |
| * Reads the next byte of data from this input stream. The value byte is |
| * returned as an <code>int</code> in the range <code>0</code> to |
| * <code>255</code>. If no byte is available because the end of the |
| * stream has been reached, the value <code>-1</code> is returned. This |
| * method blocks until input data is available, the end of the stream is |
| * detected, or an exception is thrown. |
| * <p> |
| * This method simply performs <code>in.read()</code> and returns the |
| * result. |
| * |
| * @return the next byte of data, or <code>-1</code> if the end of the |
| * stream is reached. |
| * @exception IOException |
| * if an I/O error occurs. |
| * @see java.io.FilterInputStream#in |
| */ |
| public int read() throws IOException { |
| int b = in.read(); |
| if (debug) { |
| traceStream.write(b); |
| } |
| return b; |
| } |
| } |