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.optional.extension.resolvers;
  
  import java.io.File;
  import java.net.URL;
  
  import org.apache.tools.ant.BuildException;
  import org.apache.tools.ant.Project;
  import org.apache.tools.ant.taskdefs.Get;
  import org.apache.tools.ant.taskdefs.optional.extension.Extension;
  import org.apache.tools.ant.taskdefs.optional.extension.ExtensionResolver;
  
  /**
   * Resolver that just returns s specified location.
   *
   */
  public class URLResolver implements ExtensionResolver {
      private File destfile;
      private File destdir;
      private URL url;
  
      /**
       * Sets the URL
       * @param url the url
       */
      public void setUrl(final URL url) {
          this.url = url;
      }
  
      /**
       * Sets the destination file
       * @param destfile the destination file
       */
      public void setDestfile(final File destfile) {
          this.destfile = destfile;
      }
  
      /**
       * Sets the destination directory
       * @param destdir the destination directory
       */
      public void setDestdir(final File destdir) {
          this.destdir = destdir;
      }
  
      /**
       * Returns the file resolved from URL and directory
       * @param extension the extension
       * @param project the project
       * @return file the file resolved
       * @throws BuildException if the URL is invalid
       */
      @Override
      public File resolve(final Extension extension,
                           final Project project) throws BuildException {
          validate();
  
          final File file = getDest();
  
          final Get get = new Get();
          get.setProject(project);
          get.setDest(file);
          get.setSrc(url);
          get.execute();
  
          return file;
      }
  
      /*
       * Gets the destination file
       */
      private File getDest() {
          File result;
          if (null != destfile) {
              result = destfile;
          } else {
              final String file = url.getFile();
              String filename;
              if (null == file || file.length() <= 1) {
                  filename = "default.file";
              } else {
                  int index = file.lastIndexOf('/');
                  if (-1 == index) {
                      index = 0;
                  }
                  filename = file.substring(index);
              }
              result = new File(destdir, filename);
          }
          return result;
      }
  
      /*
       * Validates URL
       */
      private void validate() {
          if (null == url) {
              throw new BuildException("Must specify URL");
          }
          if (null == destdir && null == destfile) {
              throw new BuildException(
                  "Must specify destination file or directory");
          }
          if (null != destdir && null != destfile) {
              throw new BuildException(
                  "Must not specify both destination file or directory");
          }
      }
  
      /**
       * Returns a string representation of the URL
       * @return the string representation
       */
      @Override
      public String toString() {
          return "URL[" + url + "]";
      }
  }
  