| /* |
| * 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. |
| */ |
| package org.apache.axiom.mime; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.apache.commons.logging.Log; |
| |
| final class DebugInputStream extends InputStream { |
| private final InputStream parent; |
| private final Log log; |
| private long read; |
| private int chunks; |
| private boolean logged; |
| |
| DebugInputStream(InputStream parent, Log log) { |
| this.parent = parent; |
| this.log = log; |
| } |
| |
| private void log(IOException ex) { |
| if (!logged) { |
| log.debug("IOException occurred after reading " + read + " bytes in " + chunks + " chunks", ex); |
| logged = true; |
| } |
| } |
| |
| private void logEOF() { |
| if (!logged) { |
| log.debug("EOF reached after reading " + read + " bytes in " + chunks + " chunks"); |
| logged = true; |
| } |
| } |
| |
| @Override |
| public int available() throws IOException { |
| try { |
| return parent.available(); |
| } catch (IOException ex) { |
| log(ex); |
| throw ex; |
| } |
| } |
| |
| @Override |
| public boolean markSupported() { |
| return parent.markSupported(); |
| } |
| |
| @Override |
| public void mark(int readlimit) { |
| parent.mark(readlimit); |
| } |
| |
| @Override |
| public void reset() throws IOException { |
| try { |
| parent.reset(); |
| } catch (IOException ex) { |
| log(ex); |
| throw ex; |
| } |
| } |
| |
| @Override |
| public int read() throws IOException { |
| int result; |
| try { |
| result = parent.read(); |
| } catch (IOException ex) { |
| log(ex); |
| throw ex; |
| } |
| if (result == -1) { |
| logEOF(); |
| } else { |
| read++; |
| chunks++; |
| } |
| return result; |
| } |
| |
| @Override |
| public int read(byte[] b, int off, int len) throws IOException { |
| int c; |
| try { |
| c = parent.read(b, off, len); |
| } catch (IOException ex) { |
| log(ex); |
| throw ex; |
| } |
| if (c == -1) { |
| logEOF(); |
| } else { |
| read += c; |
| chunks++; |
| } |
| return c; |
| } |
| |
| @Override |
| public long skip(long n) throws IOException { |
| try { |
| return parent.skip(n); |
| } catch (IOException ex) { |
| log(ex); |
| throw ex; |
| } |
| } |
| |
| @Override |
| public void close() throws IOException { |
| if (!logged) { |
| log.debug("Closing stream after reading " + read + " bytes in " + chunks + " chunks"); |
| logged = true; |
| } |
| parent.close(); |
| } |
| } |