diff options
Diffstat (limited to 'sca-java-1.x/tags/1.5/modules/implementation-web/src/main/java/org/apache/tuscany/sca/implementation/web/introspect/ReferenceProcessor.java')
-rw-r--r-- | sca-java-1.x/tags/1.5/modules/implementation-web/src/main/java/org/apache/tuscany/sca/implementation/web/introspect/ReferenceProcessor.java | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/1.5/modules/implementation-web/src/main/java/org/apache/tuscany/sca/implementation/web/introspect/ReferenceProcessor.java b/sca-java-1.x/tags/1.5/modules/implementation-web/src/main/java/org/apache/tuscany/sca/implementation/web/introspect/ReferenceProcessor.java new file mode 100644 index 0000000000..d8c44fbcf2 --- /dev/null +++ b/sca-java-1.x/tags/1.5/modules/implementation-web/src/main/java/org/apache/tuscany/sca/implementation/web/introspect/ReferenceProcessor.java @@ -0,0 +1,181 @@ +/* + * 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.tuscany.sca.implementation.web.introspect; + +import static org.apache.tuscany.sca.implementation.java.introspect.impl.JavaIntrospectionHelper.getBaseType; + +import java.lang.annotation.ElementType; +import java.lang.reflect.Field; +import java.lang.reflect.Method; +import java.lang.reflect.Type; +import java.util.Collection; +import java.util.List; + +import org.apache.tuscany.sca.assembly.AssemblyFactory; +import org.apache.tuscany.sca.assembly.Multiplicity; +import org.apache.tuscany.sca.implementation.java.IntrospectionException; +import org.apache.tuscany.sca.implementation.java.JavaImplementation; +import org.apache.tuscany.sca.implementation.java.impl.JavaElementImpl; +import org.apache.tuscany.sca.implementation.java.impl.JavaParameterImpl; +import org.apache.tuscany.sca.implementation.java.introspect.impl.BaseJavaClassVisitor; +import org.apache.tuscany.sca.implementation.java.introspect.impl.DuplicateReferenceException; +import org.apache.tuscany.sca.implementation.java.introspect.impl.IllegalReferenceException; +import org.apache.tuscany.sca.implementation.java.introspect.impl.JavaIntrospectionHelper; +import org.apache.tuscany.sca.interfacedef.InvalidInterfaceException; +import org.apache.tuscany.sca.interfacedef.java.JavaInterface; +import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceContract; +import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceFactory; +import org.osoa.sca.CallableReference; +import org.osoa.sca.annotations.Reference; + +/** + * Class to handle annotations that add References. + * + * @version $Rev$ $Date$ + */ +public class ReferenceProcessor extends BaseJavaClassVisitor { + private JavaInterfaceFactory javaFactory; + + public ReferenceProcessor(AssemblyFactory assemblyFactory, JavaInterfaceFactory javaFactory) { + super(assemblyFactory); + this.javaFactory = javaFactory; + } + + @Override + public void visitMethod(Method method, JavaImplementation type) throws IntrospectionException { + Reference annotation = method.getAnnotation(Reference.class); + if (annotation == null) { + return; // Not a reference annotation. + } + if (!JavaIntrospectionHelper.isSetter(method)) { + throw new IllegalReferenceException("Annotated method is not a setter: " + method, method); + } + String name = annotation.name(); + if ("".equals(name)) { + name = JavaIntrospectionHelper.toPropertyName(method.getName()); + // When the name is not specified, prefix the computed name with the class name + name = method.getDeclaringClass().getName()+"_"+name; + } + JavaElementImpl ref = type.getReferenceMembers().get(name); + // Setter override field + if (ref != null && ref.getElementType() != ElementType.FIELD) { + throw new DuplicateReferenceException(name); + } + removeReference(ref, type); + + JavaElementImpl element = new JavaElementImpl(method, 0); + org.apache.tuscany.sca.assembly.Reference reference = createReference(element, name); + type.getReferences().add(reference); + type.getReferenceMembers().put(name, element); + } + + private boolean removeReference(JavaElementImpl ref, JavaImplementation type) { + if (ref == null) { + return false; + } + List<org.apache.tuscany.sca.assembly.Reference> refs = type.getReferences(); + for (int i = 0; i < refs.size(); i++) { + if (refs.get(i).getName().equals(ref.getName())) { + refs.remove(i); + return true; + } + } + return false; + } + + @Override + public void visitField(Field field, JavaImplementation type) throws IntrospectionException { + Reference annotation = field.getAnnotation(Reference.class); + if (annotation == null) { + return; + } + String name = annotation.name(); + if ("".equals(name)) { + name = field.getName(); + // When the name is not specified, prefix the computed name with the class name + name = field.getDeclaringClass().getName()+"_"+name; + } + JavaElementImpl ref = type.getReferenceMembers().get(name); + if (ref != null && ref.getElementType() == ElementType.FIELD) { + throw new DuplicateReferenceException(name); + } + + // Setter method override field + if (ref == null) { + JavaElementImpl element = new JavaElementImpl(field); + org.apache.tuscany.sca.assembly.Reference reference = createReference(element, name); + type.getReferences().add(reference); + type.getReferenceMembers().put(name, element); + } + } + + @Override + public void visitConstructorParameter(JavaParameterImpl parameter, JavaImplementation type) + throws IntrospectionException { + } + + private org.apache.tuscany.sca.assembly.Reference createReference(JavaElementImpl element, String name) + throws IntrospectionException { + org.apache.tuscany.sca.assembly.Reference reference = assemblyFactory.createReference(); + JavaInterfaceContract interfaceContract = javaFactory.createJavaInterfaceContract(); + reference.setInterfaceContract(interfaceContract); + + // reference.setMember((Member)element.getAnchor()); + boolean required = true; + Reference ref = element.getAnnotation(Reference.class); + if (ref != null) { + required = ref.required(); + } + // reference.setRequired(required); + reference.setName(name); + Class<?> rawType = element.getType(); + if (rawType.isArray() || Collection.class.isAssignableFrom(rawType)) { + if (required) { + reference.setMultiplicity(Multiplicity.ONE_N); + } else { + reference.setMultiplicity(Multiplicity.ZERO_N); + } + } else { + if (required) { + reference.setMultiplicity(Multiplicity.ONE_ONE); + } else { + reference.setMultiplicity(Multiplicity.ZERO_ONE); + } + } + Type genericType = element.getGenericType(); + Class<?> baseType = getBaseType(rawType, genericType); + if (CallableReference.class.isAssignableFrom(baseType)) { + if (Collection.class.isAssignableFrom(rawType)) { + genericType = JavaIntrospectionHelper.getParameterType(genericType); + } + baseType = JavaIntrospectionHelper.getBusinessInterface(baseType, genericType); + } + try { + JavaInterface callInterface = javaFactory.createJavaInterface(baseType); + reference.getInterfaceContract().setInterface(callInterface); + if (callInterface.getCallbackClass() != null) { + JavaInterface callbackInterface = javaFactory.createJavaInterface(callInterface.getCallbackClass()); + reference.getInterfaceContract().setCallbackInterface(callbackInterface); + } + } catch (InvalidInterfaceException e) { + throw new IntrospectionException(e); + } + return reference; + } +} |