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/*
* 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.java.introspect.impl;
import java.lang.annotation.Annotation;
import java.lang.annotation.ElementType;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import org.apache.tuscany.sca.assembly.AssemblyFactory;
import org.apache.tuscany.sca.assembly.Property;
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.interfacedef.util.JavaXMLMapper;
/**
* Base class for ImplementationProcessors that handle annotations that add
* Properties.
*
* @version $Rev$ $Date$
*/
public abstract class AbstractPropertyProcessor<A extends Annotation> extends BaseJavaClassVisitor {
private final Class<A> annotationClass;
protected AbstractPropertyProcessor(AssemblyFactory assemblyFactory, Class<A> annotationClass) {
super(assemblyFactory);
this.annotationClass = annotationClass;
}
private boolean removeProperty(JavaElementImpl prop, JavaImplementation type) {
if(prop==null) {
return false;
}
List<Property> props = type.getProperties();
for(int i=0;i<props.size();i++) {
if(props.get(i).getName().equals(prop.getName())) {
props.remove(i);
return true;
}
}
return false;
}
@Override
public void visitMethod(Method method, JavaImplementation type) throws IntrospectionException {
A annotation = method.getAnnotation(annotationClass);
if (annotation == null) {
return;
}
if (!JavaIntrospectionHelper.isSetter(method)) {
throw new IllegalPropertyException("Annotated method is not a setter: " + method, method);
}
String name = getName(annotation);
if (name == null || "".equals(name)) {
name = method.getName();
if (name.startsWith("set")) {
name = JavaIntrospectionHelper.toPropertyName(method.getName());
}
}
Map<String, JavaElementImpl> properties = type.getPropertyMembers();
JavaElementImpl prop = properties.get(name);
// Setter override field
if (prop != null && prop.getElementType() != ElementType.FIELD) {
throw new DuplicatePropertyException(name);
}
removeProperty(prop, type);
JavaElementImpl element = new JavaElementImpl(method, 0);
Property property = createProperty(name, element);
// add databinding available as annotations, as extensions
initProperty(property, annotation);
type.getProperties().add(property);
properties.put(name, element);
}
@Override
public void visitField(Field field, JavaImplementation type) throws IntrospectionException {
A annotation = field.getAnnotation(annotationClass);
if (annotation == null) {
return;
}
String name = getName(annotation);
if (name == null) {
name = "";
}
if ("".equals(name) || name.equals(field.getType().getName())) {
name = field.getName();
}
Map<String, JavaElementImpl> properties = type.getPropertyMembers();
JavaElementImpl prop = properties.get(name);
// Setter override field
if (prop != null && prop.getElementType() == ElementType.FIELD) {
throw new DuplicatePropertyException(name);
}
if (prop == null) {
JavaElementImpl element = new JavaElementImpl(field);
Property property = createProperty(name, element);
initProperty(property, annotation);
type.getProperties().add(property);
properties.put(name, element);
}
}
@Override
public void visitConstructorParameter(JavaParameterImpl parameter, JavaImplementation type)
throws IntrospectionException {
Map<String, JavaElementImpl> properties = type.getPropertyMembers();
A annotation = parameter.getAnnotation(annotationClass);
if (annotation != null) {
String name = getName(annotation);
if (name == null) {
name = parameter.getType().getName();
}
if (!"".equals(name) && !"".equals(parameter.getName()) && !name.equals(parameter.getName())) {
throw new InvalidConstructorException("Mismatched property name: " + parameter);
}
if ("".equals(name) && "".equals(parameter.getName())) {
throw new InvalidPropertyException("Missing property name: " + parameter);
}
if ("".equals(name)) {
name = parameter.getName();
}
JavaElementImpl prop = properties.get(name);
// Setter override field
if (prop != null && prop.getElementType() != ElementType.FIELD) {
throw new DuplicatePropertyException(name);
}
removeProperty(prop, type);
parameter.setName(name);
parameter.setClassifer(annotationClass);
Property property = createProperty(name, parameter);
initProperty(property, annotation);
type.getProperties().add(property);
properties.put(name, parameter);
}
}
protected abstract String getName(A annotation);
protected abstract void initProperty(Property property, A annotation) throws IntrospectionException;
@SuppressWarnings("unchecked")
protected Property createProperty(String name, JavaElementImpl element) throws IntrospectionException {
Property property = assemblyFactory.createProperty();
property.setName(name);
Class<?> baseType = JavaIntrospectionHelper.getBaseType(element.getType(), element.getGenericType());
property.setXSDType(JavaXMLMapper.getXMLType(baseType));
Class<?> javaType = element.getType();
if (javaType.isArray() || Collection.class.isAssignableFrom(javaType)) {
property.setMany(true);
}
return property;
}
}
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