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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.core.databinding.processor;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.tuscany.sca.databinding.DataBindingExtensionPoint;
import org.apache.tuscany.sca.databinding.WrapperHandler;
import org.apache.tuscany.sca.databinding.annotation.DataBinding;
import org.apache.tuscany.sca.databinding.javabeans.JavaBeansDataBinding;
import org.apache.tuscany.sca.databinding.javabeans.SimpleJavaDataBinding;
import org.apache.tuscany.sca.interfacedef.DataType;
import org.apache.tuscany.sca.interfacedef.InvalidInterfaceException;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
import org.apache.tuscany.sca.interfacedef.java.JavaOperation;
import org.apache.tuscany.sca.interfacedef.java.introspect.JavaInterfaceVisitor;
import org.apache.tuscany.sca.interfacedef.util.WrapperInfo;
/**
* The databinding annotation processor for java interfaces
*
* @version $Rev$ $Date$
*/
public class DataBindingJavaInterfaceProcessor implements JavaInterfaceVisitor {
private static final String JAXB_DATABINDING = "javax.xml.bind.JAXBElement";
private DataBindingExtensionPoint dataBindingRegistry;
public DataBindingJavaInterfaceProcessor(DataBindingExtensionPoint dataBindingRegistry) {
super();
this.dataBindingRegistry = dataBindingRegistry;
}
public void visitInterface(JavaInterface javaInterface) throws InvalidInterfaceException {
if (!javaInterface.isRemotable()) {
return;
}
List<Operation> operations = javaInterface.getOperations();
processInterface(javaInterface, operations);
}
private void processInterface(JavaInterface javaInterface, List<Operation> operations) {
Class<?> clazz = javaInterface.getJavaClass();
DataBinding dataBinding = clazz.getAnnotation(DataBinding.class);
String dataBindingId = null;
boolean wrapperStyle = false;
if (dataBinding != null) {
dataBindingId = dataBinding.value();
wrapperStyle = dataBinding.wrapped();
}
Map<String, Operation> opMap = new HashMap<String, Operation>();
for (Operation op : javaInterface.getOperations()) {
opMap.put(op.getName(), op);
// In the case of @WebMethod, the method name can be different from the operation name
if (op instanceof JavaOperation) {
opMap.put(((JavaOperation)op).getJavaMethod().getName(), op);
}
if (dataBindingId != null) {
op.setDataBinding(dataBindingId);
op.setWrapperStyle(wrapperStyle);
}
}
for (Method method : clazz.getMethods()) {
if (method.getDeclaringClass() == Object.class) {
continue;
}
Operation operation = opMap.get(method.getName());
if (operation == null) { // @WebMethod exclude=true
continue;
}
DataBinding methodDataBinding = clazz.getAnnotation(DataBinding.class);
if (methodDataBinding == null) {
methodDataBinding = dataBinding;
}
dataBindingId = null;
wrapperStyle = false;
if (dataBinding != null) {
dataBindingId = dataBinding.value();
wrapperStyle = dataBinding.wrapped();
operation.setDataBinding(dataBindingId);
operation.setWrapperStyle(wrapperStyle);
}
// FIXME: We need a better way to identify simple java types
int i = 0;
for (org.apache.tuscany.sca.interfacedef.DataType<?> d : operation.getInputType().getLogical()) {
if (d.getDataBinding() == null) {
d.setDataBinding(dataBindingId);
}
for (Annotation a : method.getParameterAnnotations()[i]) {
if (a.annotationType() == org.apache.tuscany.sca.databinding.annotation.DataType.class) {
String value = ((org.apache.tuscany.sca.databinding.annotation.DataType)a).value();
d.setDataBinding(value);
}
}
dataBindingRegistry.introspectType(d, operation);
i++;
}
if (operation.getOutputType() != null) {
DataType<?> d = operation.getOutputType();
if (d.getDataBinding() == null) {
d.setDataBinding(dataBindingId);
}
org.apache.tuscany.sca.databinding.annotation.DataType dt =
method.getAnnotation(org.apache.tuscany.sca.databinding.annotation.DataType.class);
if (dt != null) {
d.setDataBinding(dt.value());
}
dataBindingRegistry.introspectType(d, operation);
}
for (org.apache.tuscany.sca.interfacedef.DataType<?> d : operation.getFaultTypes()) {
if (d.getDataBinding() == null) {
d.setDataBinding(dataBindingId);
}
// TODO: Handle exceptions
dataBindingRegistry.introspectType(d, operation);
}
// JIRA: TUSCANY-842
String db = operation.getDataBinding();
if (db == null || JAXB_DATABINDING.equals(db)) {
assignOperationDataBinding(operation);
db = operation.getDataBinding();
}
// Introspect the wrapper data type
if (operation.getWrapper() != null) {
org.apache.tuscany.sca.databinding.DataBinding dbObj =
dataBindingRegistry.getDataBinding(db);
WrapperHandler handler = dbObj == null ? null : dbObj.getWrapperHandler();
if (handler != null) {
WrapperInfo wrapper = operation.getWrapper();
wrapper.setInputWrapperType(handler.getWrapperType(operation, true));
wrapper.setOutputWrapperType(handler.getWrapperType(operation, false));
}
if (dbObj != null && handler == null) {
// To avoid JAXB wrapper bean generation
WrapperInfo wrapper = operation.getWrapper();
wrapper.setInputWrapperType(null);
wrapper.setOutputWrapperType(null);
}
}
}
}
/*
* Assigns an operation DB if one of the input types, output type, fault types has a non-default DB.
* However, if two of the input types, output type, fault types have two different non-default DBs
* ( e.g. SDO and JAXB), then we do nothing to the operation DB.
*
* The method logic assumes the JavaBeans DataBinding is the default
*/
private void assignOperationDataBinding(Operation operation) {
Set<String> dbs = new HashSet<String>();
// Can't use DataType<?> since operation.getInputType() returns: DataType<List<DataType>>
List<DataType> opDataTypes = new LinkedList<DataType>();
opDataTypes.addAll(operation.getInputType().getLogical());
opDataTypes.add(operation.getOutputType());
for (DataType<DataType> ft : operation.getFaultTypes()) {
opDataTypes.add(ft.getLogical());
}
for (DataType<?> d : opDataTypes) {
if (d != null) {
String dataBinding = d.getDataBinding();
if ("java:array".equals(dataBinding)) {
dataBinding = ((DataType)d.getLogical()).getDataBinding();
}
if (dataBinding != null) {
dbs.add(dataBinding);
}
}
}
dbs.remove(JavaBeansDataBinding.NAME);
dbs.remove(SimpleJavaDataBinding.NAME);
if (dbs.size() == 1) {
operation.setDataBinding(dbs.iterator().next());
}
}
}
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