| /* |
| * 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.sling.models.impl; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.sling.api.SlingHttpServletRequest; |
| import org.apache.sling.api.resource.Resource; |
| import org.apache.sling.models.annotations.Model; |
| import org.apache.sling.models.spi.ImplementationPicker; |
| import org.jetbrains.annotations.NotNull; |
| import org.osgi.framework.Constants; |
| import org.osgi.service.component.annotations.Component; |
| |
| @Component(property = Constants.SERVICE_RANKING + ":Integer=0") // this must come before FirstImplementationPicker |
| public class ResourceTypeBasedResourcePicker implements ImplementationPicker { |
| |
| @Override |
| public Class<?> pick( |
| @NotNull Class<?> adapterType, Class<?> @NotNull [] implementationsTypes, @NotNull Object adaptable) { |
| final Resource resource = findResource(adaptable); |
| if (resource == null) { |
| return null; |
| } |
| |
| Map<String, Class<?>> implementationsByRT = mapByResourceType(implementationsTypes); |
| return AdapterImplementations.getModelClassForResource(resource, implementationsByRT); |
| } |
| |
| private Resource findResource(Object adaptable) { |
| if (adaptable instanceof Resource) { |
| return (Resource) adaptable; |
| } else if (adaptable instanceof SlingHttpServletRequest) { |
| return ((SlingHttpServletRequest) adaptable).getResource(); |
| } else { |
| return null; |
| } |
| } |
| |
| private Map<String, Class<?>> mapByResourceType(Class<?>[] implementationTypes) { |
| Map<String, Class<?>> retval = new HashMap<String, Class<?>>(implementationTypes.length); |
| |
| for (Class<?> clazz : implementationTypes) { |
| Model modelAnnotation = clazz.getAnnotation(Model.class); |
| // this really should always be non-null at this point, but just in case... |
| if (modelAnnotation != null) { |
| String[] resourceTypes = modelAnnotation.resourceType(); |
| for (String resourceType : resourceTypes) { |
| if (!retval.containsKey(resourceType)) { |
| retval.put(resourceType, clazz); |
| } |
| } |
| } |
| } |
| return retval; |
| } |
| } |