| /* |
| * 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.injectors; |
| |
| import java.lang.reflect.AnnotatedElement; |
| import java.lang.reflect.Type; |
| |
| import javax.servlet.ServletRequest; |
| |
| import org.apache.commons.lang3.ObjectUtils; |
| import org.apache.sling.api.scripting.SlingBindings; |
| import org.apache.sling.models.annotations.injectorspecific.InjectionStrategy; |
| import org.apache.sling.models.annotations.injectorspecific.ScriptVariable; |
| import org.apache.sling.models.spi.DisposalCallbackRegistry; |
| import org.apache.sling.models.spi.Injector; |
| import org.apache.sling.models.spi.ValuePreparer; |
| import org.apache.sling.models.spi.injectorspecific.AbstractInjectAnnotationProcessor2; |
| import org.apache.sling.models.spi.injectorspecific.InjectAnnotationProcessor2; |
| import org.apache.sling.models.spi.injectorspecific.StaticInjectAnnotationProcessorFactory; |
| import org.jetbrains.annotations.NotNull; |
| import org.osgi.framework.Constants; |
| import org.osgi.service.component.annotations.Component; |
| |
| @Component(property=Constants.SERVICE_RANKING+":Integer=1000", service={Injector.class, StaticInjectAnnotationProcessorFactory.class, ValuePreparer.class}) |
| public class BindingsInjector implements Injector, StaticInjectAnnotationProcessorFactory, ValuePreparer { |
| |
| @Override |
| public @NotNull String getName() { |
| return "script-bindings"; |
| } |
| |
| @Override |
| public Object getValue(@NotNull Object adaptable, String name, @NotNull Type type, @NotNull AnnotatedElement element, |
| @NotNull DisposalCallbackRegistry callbackRegistry) { |
| if (adaptable == ObjectUtils.NULL) { |
| return null; |
| } |
| SlingBindings bindings = getBindings(adaptable); |
| if (bindings == null) { |
| return null; |
| } |
| return bindings.get(name); |
| } |
| |
| private SlingBindings getBindings(Object adaptable) { |
| if (adaptable instanceof SlingBindings) { |
| return (SlingBindings) adaptable; |
| } else if (adaptable instanceof ServletRequest) { |
| ServletRequest request = (ServletRequest) adaptable; |
| return (SlingBindings) request.getAttribute(SlingBindings.class.getName()); |
| } else { |
| return null; |
| } |
| } |
| |
| @Override |
| public InjectAnnotationProcessor2 createAnnotationProcessor(AnnotatedElement element) { |
| // check if the element has the expected annotation |
| ScriptVariable annotation = element.getAnnotation(ScriptVariable.class); |
| if (annotation != null) { |
| return new ScriptVariableAnnotationProcessor(annotation); |
| } |
| return null; |
| } |
| |
| @Override |
| public Object prepareValue(Object adaptable) { |
| Object prepared = getBindings(adaptable); |
| return prepared != null ? prepared : ObjectUtils.NULL; |
| } |
| |
| private static class ScriptVariableAnnotationProcessor extends AbstractInjectAnnotationProcessor2 { |
| |
| private final ScriptVariable annotation; |
| |
| public ScriptVariableAnnotationProcessor(ScriptVariable annotation) { |
| this.annotation = annotation; |
| } |
| |
| @Override |
| public InjectionStrategy getInjectionStrategy() { |
| return annotation.injectionStrategy(); |
| } |
| |
| @Override |
| @SuppressWarnings("deprecation") |
| public Boolean isOptional() { |
| return annotation.optional(); |
| } |
| |
| @Override |
| public String getName() { |
| // since null is not allowed as default value in annotations, the empty string means, the default should be |
| // used! |
| if (annotation.name().isEmpty()) { |
| return null; |
| } |
| return annotation.name(); |
| } |
| } |
| |
| } |