com.predic8.membrane.core.util.ClassFinder Maven / Gradle / Ivy
/*
* Copyright 2016 predic8 GmbH, www.predic8.com
* 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 com.predic8.membrane.core.util;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;
public class ClassFinder {
private static final char PKG_SEPARATOR = '.';
private static final char DIR_SEPARATOR = '/';
private static final String CLASS_FILE_SUFFIX = ".class";
public static List> find(ClassLoader loader, String scannedPackage) throws IOException, ClassNotFoundException {
String scannedPath = scannedPackage.replace(PKG_SEPARATOR, DIR_SEPARATOR);
ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(loader);
Resource[] resources = resolver.getResources("classpath:" + scannedPath +"/*") ;
List> classes = new ArrayList<>();
for (Resource resource: resources){
String filename = resource.getFilename();
Class clazz = getClasses(resolver, scannedPackage, filename);
if(clazz != null)
classes.add(clazz);
}
return classes;
}
public static Class getClasses(ResourcePatternResolver resolver, String scannedPackage, String s) throws ClassNotFoundException {
if(s == null || s.isEmpty() || s.contains("$") || !s.contains(CLASS_FILE_SUFFIX))
return null;
s = scannedPackage + "." + s.replaceFirst(Pattern.quote(CLASS_FILE_SUFFIX),"");
return resolver.getClassLoader().loadClass(s);
}
}