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
   *
   *      https://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.
   *
   */
  
  /*
   * Since the initial version of this file was developed on the clock on
   * an NSF grant I should say the following boilerplate:
   *
   * This material is based upon work supported by the National Science
   * Foundation under Grant No. EIA-0196404. Any opinions, findings, and
   * conclusions or recommendations expressed in this material are those
   * of the author and do not necessarily reflect the views of the
   * National Science Foundation.
   */
  
  package org.apache.tools.ant.taskdefs.optional.unix;
  
  import java.io.File;
  
  import org.apache.tools.ant.BuildException;
  import org.apache.tools.ant.taskdefs.ExecuteOn;
  import org.apache.tools.ant.taskdefs.condition.Os;
  import org.apache.tools.ant.types.Commandline;
  import org.apache.tools.ant.types.FileSet;
  
  /**
   * @since Ant 1.6
   *
   * @ant.task category="filesystem"
   */
  
  public abstract class AbstractAccessTask extends ExecuteOn {
  
      /**
       * Chmod task for setting file and directory permissions.
       */
      public AbstractAccessTask() {
          super.setParallel(true);
          super.setSkipEmptyFilesets(true);
      }
  
      /**
       * Set the file which should have its access attributes modified.
       * @param src the file to modify
       */
      public void setFile(File src) {
          FileSet fs = new FileSet();
          fs.setFile(src);
          addFileset(fs);
      }
  
      /**
       * Prevent the user from specifying a different command.
       *
       * @ant.attribute ignore="true"
       * @param cmdl A user supplied command line that we won't accept.
       */
      @Override
      public void setCommand(Commandline cmdl) {
          throw new BuildException(getTaskType()
                                   + " doesn't support the command attribute",
                                   getLocation());
      }
  
      /**
       * Prevent the skipping of empty filesets
       *
       * @ant.attribute ignore="true"
       * @param skip A user supplied boolean we won't accept.
       */
      @Override
      public void setSkipEmptyFilesets(boolean skip) {
          throw new BuildException(getTaskType() + " doesn't support the "
                                   + "skipemptyfileset attribute",
                                   getLocation());
      }
  
      /**
       * Prevent the use of the addsourcefile attribute.
       *
       * @ant.attribute ignore="true"
       * @param b A user supplied boolean we won't accept.
       */
      @Override
      public void setAddsourcefile(boolean b) {
          throw new BuildException(getTaskType()
              + " doesn't support the addsourcefile attribute", getLocation());
      }
  
      /**
       * Automatically approve Unix OS's.
       * @return true if a valid OS, for unix this is always true, otherwise
       *              use the superclasses' test (user set).
       */
      @Override
      protected boolean isValidOs() {
          return getOs() == null && getOsFamily() == null
              ? Os.isFamily(Os.FAMILY_UNIX) : super.isValidOs();
      }
  }
  