org.apache.kafka.connect.util.ReflectionsUtil Maven / Gradle / Ivy
/*
* 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.kafka.connect.util;
import org.reflections.vfs.Vfs;
import org.reflections.vfs.Vfs.Dir;
import org.reflections.vfs.Vfs.File;
import org.reflections.vfs.Vfs.UrlType;
import java.net.URL;
import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
/**
* CLASSPATH on OSX contains .mar and .jnilib file extensions. Vfs used by Reflections does not recognize
* urls with those extensions and log WARNs when scan them. Those WARNs can be eliminated by registering
* URL types before using reflection.
*/
public class ReflectionsUtil {
private static final String FILE_PROTOCOL = "file";
private static final List ENDINGS = Arrays.asList(".mar", ".jnilib", "*");
public static void registerUrlTypes() {
final List urlTypes = new LinkedList<>();
urlTypes.add(new EmptyUrlType(ENDINGS));
urlTypes.addAll(Arrays.asList(Vfs.DefaultUrlTypes.values()));
Vfs.setDefaultURLTypes(urlTypes);
}
private static class EmptyUrlType implements UrlType {
private final List endings;
private EmptyUrlType(final List endings) {
this.endings = endings;
}
@Override
public boolean matches(URL url) {
final String protocol = url.getProtocol();
final String externalForm = url.toExternalForm();
if (!protocol.equals(FILE_PROTOCOL)) {
return false;
}
for (String ending : endings) {
if (externalForm.endsWith(ending)) {
return true;
}
}
return false;
}
@Override
public Dir createDir(final URL url) throws Exception {
return emptyVfsDir(url);
}
private static Dir emptyVfsDir(final URL url) {
return new Dir() {
@Override
public String getPath() {
return url.toExternalForm();
}
@Override
public Iterable getFiles() {
return Collections.emptyList();
}
@Override
public void close() {
}
};
}
}
}