package org.codehaus.plexus.util.io;
   
   /*
    * Copyright The Codehaus Foundation.
    *
    * Licensed 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.File;
  import java.io.IOException;
  import java.io.OutputStreamWriter;
  import java.nio.charset.Charset;
  import java.nio.file.Path;
  import java.util.Objects;
  
  /**
   * Caching Writer to avoid overwriting a file with
   * the same content.
   */
  public class CachingWriter extends OutputStreamWriter {
      private final CachingOutputStream cos;
  
      public CachingWriter(File path, Charset charset) throws IOException {
          this(Objects.requireNonNull(path).toPath(), charset);
      }
  
      public CachingWriter(Path path, Charset charset) throws IOException {
          this(path, charset, 32 * 1024);
      }
  
      public CachingWriter(Path path, Charset charset, int bufferSize) throws IOException {
          this(new CachingOutputStream(path, bufferSize), charset);
      }
  
      private CachingWriter(CachingOutputStream outputStream, Charset charset) throws IOException {
          super(outputStream, charset);
          this.cos = outputStream;
      }
  
      public boolean isModified() {
          return cos.isModified();
      }
  }