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/*
* 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.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
*/
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) {
final String message = "Must specify URL";
throw new BuildException(message);
}
if (null == destdir && null == destfile) {
final String message = "Must specify destination file or directory";
throw new BuildException(message);
} else if (null != destdir && null != destfile) {
final String message = "Must not specify both destination file or directory";
throw new BuildException(message);
}
}
/**
* Returns a string representation of the URL
* @return the string representation
*/
public String toString() {
return "URL[" + url + "]";
}
}
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