/*
* 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.isis.applib.services.classdiscovery;
import java.util.List;
import java.util.Set;
import org.reflections.Reflections;
import org.reflections.scanners.SubTypesScanner;
import org.reflections.util.ClasspathHelper;
import org.reflections.vfs.Vfs;
import org.apache.isis.applib.AbstractService;
import org.apache.isis.applib.AppManifest;
import org.apache.isis.applib.annotation.DomainService;
import org.apache.isis.applib.annotation.NatureOfService;
import org.apache.isis.applib.annotation.Programmatic;
import org.apache.isis.applib.fixturescripts.FixtureScript;
/**
* This utility service supports the dynamic discovery of classes from the classpath. One service that uses this
* is the <tt>FixtureScripts</tt> domain service.
*
* <p>
* This service has no UI and there is only one implementation (this class) in applib, so it is annotated with
* {@link DomainService}. This means that it is automatically registered and
* available for use; no further configuration is required.
* </p>
*/
@DomainService(
nature = NatureOfService.DOMAIN,
menuOrder = "" + Integer.MAX_VALUE
)
public class ClassDiscoveryServiceUsingReflections
extends AbstractService
implements ClassDiscoveryService2 {
@Programmatic
@Override
public <T> Set<Class<? extends T>> findSubTypesOfClasses(Class<T> type) {
Vfs.setDefaultURLTypes(getUrlTypes());
final Reflections reflections = new Reflections(
ClasspathHelper.forClassLoader(Thread.currentThread().getContextClassLoader()),
ClasspathHelper.forClass(Object.class),
new SubTypesScanner(false)
);
return reflections.getSubTypesOf(type);
}
@Programmatic
@Override
public <T> Set<Class<? extends T>> findSubTypesOfClasses(Class<T> type, String packagePrefix) {
if(type == FixtureScript.class) {
Set fixtureScriptTypes = AppManifest.Registry.instance().getFixtureScriptTypes();
if (fixtureScriptTypes != null) {
return fixtureScriptTypes;
}
}
// no appManifest or not asking for FixtureScripts
Vfs.setDefaultURLTypes(getUrlTypes());
final Reflections reflections = new Reflections(
ClasspathHelper.forClassLoader(Thread.currentThread().getContextClassLoader()),
ClasspathHelper.forClass(Object.class),
ClasspathHelper.forPackage(packagePrefix),
new SubTypesScanner(false)
);
return reflections.getSubTypesOf(type);
}
// //////////////////////////////////////
/**
* Has <tt>public</tt> visibility only so can be reused by other services (including Isis runtime itself).
*/
public static List<Vfs.UrlType> getUrlTypes() {
return AppManifest.Registry.instance().getUrlTypes();
}
}