edu.internet2.middleware.grouperInstallerExt.util.ExtInstallerUtils Maven / Gradle / Ivy
/*******************************************************************************
* Copyright 2012 Internet2
*
* Licensed 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 edu.internet2.middleware.grouperInstallerExt.util;
import java.io.File;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.net.URLDecoder;
/**
* utility methods for grouper.
* @author mchyzer
*
*/
@SuppressWarnings({ "serial", "unchecked" })
public class ExtInstallerUtils {
/**
* get a file name from a resource name
*
* @param resourceName
* is the classpath location
*
* @return the file path on the system
*/
public static File fileFromResourceName(String resourceName) {
URL url = computeUrl(resourceName, true);
if (url == null) {
return null;
}
try {
String fileName = URLDecoder.decode(url.getFile(), "UTF-8");
File configFile = new File(fileName);
return configFile;
} catch (UnsupportedEncodingException uee) {
throw new RuntimeException(uee);
}
}
/**
* compute a url of a resource
* @param resourceName
* @param canBeNull if cant be null, throw runtime
* @return the URL
*/
public static URL computeUrl(String resourceName, boolean canBeNull) {
//get the url of the navigation file
ClassLoader cl = classLoader();
URL url = null;
try {
//CH 20081012: sometimes it starts with slash and it shouldnt...
String newResourceName = resourceName.startsWith("/")
? resourceName.substring(1) : resourceName;
url = cl.getResource(newResourceName);
} catch (NullPointerException npe) {
String error = "computeUrl() Could not find resource file: " + resourceName;
throw new RuntimeException(error, npe);
}
if (!canBeNull && url == null) {
throw new RuntimeException("Cant find resource: " + resourceName);
}
return url;
}
/**
* fast class loader
* @return the class loader
*/
public static ClassLoader classLoader() {
return ExtInstallerUtils.class.getClassLoader();
}
}