content: /*
   * 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.commons.io.filefilter;
  
  import java.io.File;
  import java.io.Serializable;
  
  /**
   * This filter accepts <code>File</code>s that can be written to.
   * <p>
   * Example, showing how to print out a list of the
   * current directory's <i>writable</i> files:
   *
   * <pre>
   * File dir = new File(".");
   * String[] files = dir.list( CanWriteFileFilter.CAN_WRITE );
   * for ( int i = 0; i &lt; files.length; i++ ) {
   *     System.out.println(files[i]);
   * }
   * </pre>
   *
   * <p>
   * Example, showing how to print out a list of the
   * current directory's <i>un-writable</i> files:
   *
   * <pre>
   * File dir = new File(".");
   * String[] files = dir.list( CanWriteFileFilter.CANNOT_WRITE );
   * for ( int i = 0; i &lt; files.length; i++ ) {
   *     System.out.println(files[i]);
   * }
   * </pre>
   *
   * <p>
   * <b>N.B.</b> For read-only files, use 
   *    <code>CanReadFileFilter.READ_ONLY</code>.
   *
   * @since 1.3
   * @version $Id: CanWriteFileFilter.java 1307462 2012-03-30 15:13:11Z ggregory $
   */
  public class CanWriteFileFilter extends AbstractFileFilter implements Serializable {
      
      /**
  	 * 
  	 */
  	private static final long serialVersionUID = 1L;
  
  	/** Singleton instance of <i>writable</i> filter */
      public static final IOFileFilter CAN_WRITE = new CanWriteFileFilter();
  
      /** Singleton instance of not <i>writable</i> filter */
      public static final IOFileFilter CANNOT_WRITE = new NotFileFilter(CAN_WRITE);
  
      /**
       * Restrictive consructor.
       */
      protected CanWriteFileFilter() {
      }
      
      /**
       * Checks to see if the file can be written to.
       * 
       * @param file  the File to check
       * @return {@code true} if the file can be
       *  written to, otherwise {@code false}.
       */
      @Override
      public boolean accept(File file) {
          return file.canWrite();
      }
      
  }
  