/* Copyright (c) 2008 Google Inc.
*
* 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 com.google.gdata.util;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.StringWriter;
import java.util.logging.Logger;
/**
*
* Logs content of the data sent to the stream if log level is
* set to FINEST.
*
*
*/
public class LoggableInputStream extends FilterInputStream {
private final StringWriter sw = new StringWriter();
private final Logger logger;
private boolean closed = false;
public LoggableInputStream(Logger logger, InputStream stream) {
super(stream);
this.logger = logger;
}
@Override
public void close() throws IOException {
// circumvent double close
if (!closed){
logger.finest(sw.toString());
closed = true;
}
super.close();
}
@Override
public int read() throws IOException {
int readInt = super.read();
sw.write(readInt);
return readInt;
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
int read = super.read(b, off, len);
if (read > 0) {
String s = new String(b, off, read);
sw.write(s);
}
return read;
}
@Override
public int read(byte[] b) throws IOException {
int read = super.read(b);
if (read > 0) {
String s = new String(b, 0, read);
sw.write(s);
}
return read;
}
}