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.
   *
   */
  
  package org.apache.tools.ant.taskdefs.condition;
  
  import java.io.File;
  
  import org.apache.tools.ant.BuildException;
  import org.apache.tools.ant.util.JavaEnvUtils;
  import org.apache.tools.ant.util.ReflectWrapper;
  import org.apache.tools.ant.util.StringUtils;
  
  /**
   * &lt;hasfreespace&gt;
   * <p>Condition returns true if selected partition
   * has the requested space, false otherwise.</p>
   * @since Ant 1.7
   */
  public class HasFreeSpace implements Condition {
  
      private String partition;
      private String needed;
  
      /**
       * Evaluate the condition.
       * @return true if there enough free space.
       * @throws BuildException if there is a problem.
       */
      @Override
      public boolean eval() throws BuildException {
          validate();
          try {
              if (JavaEnvUtils.isAtLeastJavaVersion("1.6")) {
                  //reflection to avoid bootstrap/build problems
                  File fs = new File(partition);
                  ReflectWrapper w = new ReflectWrapper(fs);
                  long free = w.<Long>invoke("getFreeSpace");
                  return free >= StringUtils.parseHumanSizes(needed);
              }
              throw new BuildException(
                  "HasFreeSpace condition not supported on Java5 or less.");
          } catch (Exception e) {
              throw new BuildException(e);
          }
      }
  
      private void validate() throws BuildException {
          if (null == partition) {
              throw new BuildException("Please set the partition attribute.");
          }
          if (null == needed) {
              throw new BuildException("Please set the needed attribute.");
          }
      }
  
      /**
       * The partition/device to check
       * @return the partition.
       */
      public String getPartition() {
          return partition;
      }
  
      /**
       * Set the partition name.
       * @param partition the name to use.
       */
      public void setPartition(String partition) {
          this.partition = partition;
      }
  
      /**
       * The amount of free space required
       * @return the amount required
       */
      public String getNeeded() {
          return needed;
      }
  
      /**
       * Set the amount of space required.
       * @param needed the amount required.
       */
      public void setNeeded(String needed) {
          this.needed = needed;
      }
  }
  