package org.codehaus.mojo.exec;
   
   /*
    * 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.
   */
  
  import java.io.PrintStream;
  import org.apache.maven.plugin.logging.Log;
  
  /**
   * a Simple Maven Log that outputs to a Stream
   */
  class StreamLog implements Log {
      static final int DEBUG = 0;
      static final int INFO = 1;
      static final int WARN = 2;
      static final int ERROR = 3;
  
      private int level = INFO;
  
      public void setLevel(int level) {
          if (level < DEBUG || level > ERROR) {
              throw new IllegalStateException("invalid level: " + level);
          }
          this.level = level;
      }
  
      private final PrintStream s;
  
      StreamLog(PrintStream s) {
          this.s = s;
      }
  
      public void debug(CharSequence content) {
          if (isDebugEnabled()) {
              s.println(content);
          }
      }
  
      public void debug(CharSequence content, Throwable error) {
          if (isDebugEnabled()) {
              s.println(content);
          }
      }
  
      public void debug(Throwable error) {
          if (isDebugEnabled()) {
              error.printStackTrace(s);
          }
      }
  
      public void error(CharSequence content) {
          if (isErrorEnabled()) {
              s.println(content);
          }
      }
  
      public void error(CharSequence content, Throwable error) {
          error(content);
          error(error);
      }
  
      public void error(Throwable error) {
          if (isErrorEnabled()) {
              error.printStackTrace(s);
          }
      }
  
      public void info(CharSequence content) {
          if (isInfoEnabled()) {
              s.println(content);
          }
      }
  
      public void info(CharSequence content, Throwable error) {
          info(content);
          info(error);
      }
  
      public void info(Throwable error) {
          if (isInfoEnabled()) {
              error.printStackTrace(s);
          }
      }
 
     public boolean isDebugEnabled() {
         return level >= DEBUG;
     }
 
     public boolean isErrorEnabled() {
         return level >= ERROR;
     }
 
     public boolean isInfoEnabled() {
         return level >= INFO;
     }
 
     public boolean isWarnEnabled() {
         return level >= WARN;
     }
 
     public void warn(CharSequence content) {
         if (isWarnEnabled()) {
             s.println(content);
         }
     }
 
     public void warn(CharSequence content, Throwable error) {
         warn(content);
         warn(error);
     }
 
     public void warn(Throwable error) {
         if (isWarnEnabled()) {
             error.printStackTrace(s);
         }
     }
 }