/*
* Copyright 2016 Red Hat, Inc. and/or its affiliates.
*
* 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 org.optaplanner.core.config.domain;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Deque;
import java.util.List;
import org.drools.compiler.compiler.io.File;
import org.drools.compiler.compiler.io.Folder;
import org.drools.compiler.compiler.io.Resource;
import org.drools.compiler.compiler.io.memory.MemoryFileSystem;
import org.drools.compiler.kie.builder.impl.InternalKieContainer;
import org.drools.compiler.kie.builder.impl.MemoryKieModule;
import org.kie.api.builder.KieModule;
import org.kie.api.runtime.KieContainer;
import org.reflections.vfs.Vfs;
public class ReflectionsKieVfsUrlType implements Vfs.UrlType {
public static void register(KieContainer kieContainer) {
// TODO Support having multiple KieContainers on the classpath (maybe through ClassLoader to KieContainer mapping?)
Vfs.addDefaultURLTypes(new ReflectionsKieVfsUrlType(kieContainer));
}
private final KieContainer kieContainer;
public ReflectionsKieVfsUrlType(KieContainer kieContainer) {
this.kieContainer = kieContainer;
}
@Override
public boolean matches(URL url) {
return url.getProtocol().equalsIgnoreCase("mfs");
}
@Override
public Vfs.Dir createDir(URL url) {
KieModule kieModule = ((InternalKieContainer) kieContainer).getMainKieModule();
if (!(kieModule instanceof MemoryKieModule)) {
throw new IllegalStateException("The classpath url (" + url
+ ") has an mfs protocol but the kieModule (" + kieModule
+ ") is not an instance of " + MemoryKieModule.class.getSimpleName() + ".");
}
MemoryFileSystem memoryFileSystem = ((MemoryKieModule) kieModule).getMemoryFileSystem();
Folder folder = memoryFileSystem.getFolder(url.toExternalForm().substring("mfs:/".length()));
return new ReflectionsKieVfsDir(folder);
}
public static class ReflectionsKieVfsDir implements Vfs.Dir {
private final Folder kieFolder;
public ReflectionsKieVfsDir(Folder kieFolder) {
this.kieFolder = kieFolder;
}
@Override
public String getPath() {
return kieFolder.getPath().toPortableString();
}
@Override
public Iterable<Vfs.File> getFiles() {
List<Vfs.File> vfsFileList = new ArrayList<>();
Deque<Resource> resourceDeque = new ArrayDeque<>();
Collection<? extends Resource> mainMembers = kieFolder.getMembers();
if (mainMembers != null) {
resourceDeque.addAll(mainMembers);
}
while (!resourceDeque.isEmpty()) {
Resource resource = resourceDeque.pop();
if (resource instanceof File) {
File file = (File) resource;
if (file.getName().endsWith(".class")) {
vfsFileList.add(new ReflectionsKieVfsFile(file));
}
} else if (resource instanceof Folder) {
Collection<? extends Resource> members = ((Folder) resource).getMembers();
if (members != null) {
resourceDeque.addAll(members);
}
} else {
throw new IllegalStateException("Unsupported resource class (" + resource.getClass()
+ ") for resource (" + resource + ").");
}
}
return vfsFileList;
}
@Override
public void close() {
// Do nothing
}
}
public static class ReflectionsKieVfsFile implements Vfs.File {
private final File kieFile;
public ReflectionsKieVfsFile(File kieFile) {
this.kieFile = kieFile;
}
@Override
public String getName() {
return kieFile.getName();
}
@Override
public String getRelativePath() {
return kieFile.getPath().toPortableString();
}
@Override
public InputStream openInputStream() throws IOException {
return kieFile.getContents();
}
}
}