| /* |
| * 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.jackrabbit.test; |
| |
| import org.slf4j.Logger; |
| |
| import java.io.Writer; |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| |
| /** |
| * Implements a PrintWriter which allows to alternatively plug in a |
| * <code>Writer</code> or a <code>Logger</code>. |
| */ |
| public class LogPrintWriter extends PrintWriter { |
| |
| /** |
| * Internal buffer. |
| */ |
| private StringBuffer buffer = new StringBuffer(); |
| |
| /** |
| * Logger for message output. |
| */ |
| private Logger log; |
| |
| /** |
| * Creates a new <code>LogPrintWriter</code> which is based on a |
| * <code>Writer</code>. |
| * |
| * @param out the base <code>Writer</code>. |
| */ |
| public LogPrintWriter(Writer out) { |
| super(out); |
| } |
| |
| /** |
| * Creates a new <code>LogPrintWriter</code> which is based on a |
| * <code>Logger</code>. |
| * |
| * @param log the base <code>Logger</code>. |
| */ |
| public LogPrintWriter(Logger log) { |
| super(new NullWriter()); |
| this.log = log; |
| } |
| |
| /** |
| * Sets a new output <code>Writer</code>. Calling this method will flush |
| * this <code>LogPrintWriter</code> before the new <code>Writer</code> |
| * <code>out</code> is set. |
| * |
| * @param out the <code>Writer</code> to use for output. |
| */ |
| public void setWriter(Writer out) { |
| flushBuffer(); |
| this.out = out; |
| this.log = null; |
| } |
| |
| /** |
| * Sets a new <code>Logger</code>. Calling this method will flush this |
| * <code>LogPrintWriter</code> before the new <code>Logger</code> is set. |
| * |
| * @param log the new <code>Logger</code> to use for output. |
| */ |
| public void setLogger(Logger log) { |
| flushBuffer(); |
| out = new NullWriter(); |
| this.log = log; |
| } |
| |
| //------------------< overrides from PrintWriter >------------------------- |
| |
| public void close() { |
| flushBuffer(); |
| super.close(); |
| } |
| |
| public void flush() { |
| flushBuffer(); |
| super.flush(); |
| } |
| |
| public void write(int c) { |
| buffer.append(c); |
| } |
| |
| public void write(char cbuf[], int off, int len) { |
| buffer.append(cbuf, off, len); |
| } |
| |
| public void write(String str, int off, int len) { |
| buffer.append(str.substring(off, off + len)); |
| } |
| |
| public void println() { |
| if (log == null) { |
| // only add newline when operating on a writer |
| buffer.append('\n'); |
| } |
| flushBuffer(); |
| } |
| |
| //-----------------------< private methods >-------------------------------- |
| |
| private void flushBuffer() { |
| if (buffer.length() == 0) { |
| return; |
| } |
| if (log != null) { |
| log.debug(buffer.toString()); |
| } else { |
| try { |
| out.write(buffer.toString()); |
| } catch (IOException e) { |
| this.setError(); |
| } |
| } |
| // reset buffer |
| buffer.setLength(0); |
| } |
| |
| //------------------------< inter classes >--------------------------------- |
| |
| /** |
| * Implements a Writer that simply ignores all calls. |
| */ |
| private static class NullWriter extends Writer { |
| |
| public void close() throws IOException { |
| // ignore |
| } |
| |
| public void flush() throws IOException { |
| // ignore |
| } |
| |
| public void write(char cbuf[], int off, int len) throws IOException { |
| // ignore |
| } |
| } |
| } |