/*
    * 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.logging.log4j.io;
  
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.OutputStream;
  import java.io.PrintStream;
  import java.io.UnsupportedEncodingException;
  import java.nio.charset.Charset;
  import java.util.Locale;
  
  import org.apache.logging.log4j.Level;
  import org.apache.logging.log4j.Marker;
  import org.apache.logging.log4j.io.internal.InternalPrintStream;
  import org.apache.logging.log4j.spi.ExtendedLogger;
  
  /**
   * Logs each line written to a pre-defined level. Can also be configured with a Marker. This class provides an interface
   * that follows the {@link java.io.PrintStream} methods in spirit, but doesn't require output to any external stream.
   * This class should <em>not</em> be used as a stream for an underlying logger unless it's being used as a bridge.
   * Otherwise, infinite loops may occur!
   *
   * @since 2.1
   */
  public class LoggerPrintStream extends PrintStream {
      private static final String FQCN = LoggerPrintStream.class.getName();
      private final InternalPrintStream psLogger;
  
      protected LoggerPrintStream(final ExtendedLogger logger, final boolean autoFlush, final Charset charset,
                                  final String fqcn, final Level level, final Marker marker)
          throws UnsupportedEncodingException {
          super(new PrintStream(new ByteArrayOutputStream()));
          psLogger = new InternalPrintStream(logger, autoFlush, charset, fqcn == null ? FQCN : fqcn, level, marker);
      }
  
      protected LoggerPrintStream(final OutputStream out, final boolean autoFlush, final Charset charset,
                                  final ExtendedLogger logger, final String fqcn, final Level level, final Marker marker)
          throws UnsupportedEncodingException {
          super(new PrintStream(out));
          psLogger = new InternalPrintStream(out, autoFlush, charset, logger, fqcn == null ? FQCN : fqcn, level, marker);
      }
  
      private static Charset ensureNonNull(final Charset charset) {
          return charset == null ? Charset.defaultCharset() : charset;
      }
  
      @Override
      public LoggerPrintStream append(final char c) {
          psLogger.append(c);
          return this;
      }
  
      @Override
      public LoggerPrintStream append(final CharSequence csq) {
          psLogger.append(csq);
          return this;
      }
  
      @Override
      public LoggerPrintStream append(final CharSequence csq, final int start, final int end) {
          psLogger.append(csq, start, end);
          return this;
      }
  
      @Override
      public boolean checkError() {
          return psLogger.checkError();
      }
  
      @Override
      public void close() {
          psLogger.close();
      }
  
      @Override
      public void flush() {
          psLogger.flush();
      }
  
      @Override
      public LoggerPrintStream format(final Locale l, final String format, final Object... args) {
          psLogger.format(l, format, args);
          return this;
     }
 
     @Override
     public LoggerPrintStream format(final String format, final Object... args) {
         psLogger.format(format, args);
         return this;
     }
 
     @Override
     public void print(final boolean b) {
         psLogger.print(b);
     }
 
     @Override
     public void print(final char c) {
         psLogger.print(c);
     }
 
     @Override
     public void print(final char[] s) {
         psLogger.print(s);
     }
 
     @Override
     public void print(final double d) {
         psLogger.print(d);
     }
 
     @Override
     public void print(final float f) {
         psLogger.print(f);
     }
 
     @Override
     public void print(final int i) {
         psLogger.print(i);
     }
 
     @Override
     public void print(final long l) {
         psLogger.print(l);
     }
 
     @Override
     public void print(final Object obj) {
         psLogger.print(obj);
     }
 
     @Override
     public void print(final String s) {
         psLogger.print(s);
     }
 
     @Override
     public LoggerPrintStream printf(final Locale l, final String format, final Object... args) {
         psLogger.printf(l, format, args);
         return this;
     }
 
     @Override
     public LoggerPrintStream printf(final String format, final Object... args) {
         psLogger.printf(format, args);
         return this;
     }
 
     @Override
     public void println() {
         psLogger.println();
     }
 
     @Override
     public void println(final boolean x) {
         psLogger.println(x);
     }
 
     @Override
     public void println(final char x) {
         psLogger.println(x);
     }
 
     @Override
     public void println(final char[] x) {
         psLogger.println(x);
     }
 
     @Override
     public void println(final double x) {
         psLogger.println(x);
     }
 
     @Override
     public void println(final float x) {
         psLogger.println(x);
     }
 
     @Override
     public void println(final int x) {
         psLogger.println(x);
     }
 
     @Override
     public void println(final long x) {
         psLogger.println(x);
     }
 
     @Override
     public void println(final Object x) {
         psLogger.println(x);
     }
 
     @Override
     public void println(final String x) {
         psLogger.println(x);
     }
 
     @Override
     public String toString() {
         return LoggerPrintStream.class.getSimpleName() + psLogger.toString();
     }
 
     @Override
     public void write(final byte[] b) throws IOException {
         psLogger.write(b);
     }
 
     @Override
     public void write(final byte[] b, final int off, final int len) {
         psLogger.write(b, off, len);
     }
 
     @Override
     public void write(final int b) {
         psLogger.write(b);
     }
 }