/*
    * 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.FilterWriter;
  import java.io.IOException;
  import java.io.Writer;
  
  import org.apache.logging.log4j.Level;
  import org.apache.logging.log4j.Marker;
  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.Writer} methods in spirit, but doesn't require output to any external out.
   * 
   * @since 2.1
   */
  public class LoggerFilterWriter extends FilterWriter {
      private static final String FQCN = LoggerFilterWriter.class.getName();
  
      private final CharStreamLogger logger;
      private final String fqcn;
  
      protected LoggerFilterWriter(final Writer out, final ExtendedLogger logger, final String fqcn, final Level level,
                                   final Marker marker) {
          super(out);
          this.logger = new CharStreamLogger(logger, level, marker);
          this.fqcn = fqcn == null ? FQCN : fqcn;
      }
  
      @Override
      public void close() throws IOException {
          this.out.close();
          this.logger.close(this.fqcn);
      }
  
      @Override
      public void flush() throws IOException {
          this.out.flush();
      }
  
      @Override
      public String toString() {
          return LoggerFilterWriter.class.getSimpleName() + "{writer=" + this.out + '}';
      }
  
      @Override
      public void write(final char[] cbuf) throws IOException {
          this.out.write(cbuf);
          this.logger.put(this.fqcn, cbuf, 0, cbuf.length);
      }
  
      @Override
      public void write(final char[] cbuf, final int off, final int len) throws IOException {
          this.out.write(cbuf, off, len);
          this.logger.put(this.fqcn, cbuf, off, len);
      }
  
      @Override
      public void write(final int c) throws IOException {
          this.out.write(c);
          this.logger.put(this.fqcn, (char) c);
      }
  
      @Override
      public void write(final String str) throws IOException {
          this.out.write(str);
          this.logger.put(this.fqcn, str, 0, str.length());
      }
  
      @Override
      public void write(final String str, final int off, final int len) throws IOException {
          this.out.write(str, off, len);
          this.logger.put(this.fqcn, str, off, len);
      }
  }