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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.databinding.sdo;
import java.lang.reflect.Method;
import java.util.List;
import javax.xml.namespace.QName;
import org.apache.tuscany.sca.databinding.DataBinding;
import org.apache.tuscany.sca.databinding.TransformationContext;
import org.apache.tuscany.sca.databinding.TransformationException;
import org.apache.tuscany.sca.interfacedef.DataType;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.interfacedef.util.XMLType;
import org.apache.tuscany.sdo.api.SDOUtil;
import commonj.sdo.Type;
import commonj.sdo.helper.HelperContext;
import commonj.sdo.impl.HelperProvider;
/**
* Helper class to get TypeHelper from the context
*/
public final class SDOContextHelper {
private SDOContextHelper() {
}
public static HelperContext getHelperContext(TransformationContext context) {
if (context == null) {
return getDefaultHelperContext();
}
HelperContext helperContext = (HelperContext)context.getMetadata().get(HelperContext.class.getName());
if (helperContext != null) {
return helperContext;
}
helperContext = SDOUtil.createHelperContext();
boolean found = false;
Operation op = context.getSourceOperation();
if (op != null) {
found = register(helperContext, op.getInputType()) || found;
found = register(helperContext, op.getOutputType()) || found;
} else {
found = register(helperContext, context.getSourceDataType()) || found;
}
op = context.getTargetOperation();
if (op != null) {
found = register(helperContext, op.getInputType()) || found;
found = register(helperContext, op.getOutputType()) || found;
} else {
found = register(helperContext, context.getTargetDataType()) || found;
}
if (!found) {
helperContext = getDefaultHelperContext();
}
context.getMetadata().put(HelperContext.class.getName(), helperContext);
return helperContext;
}
/**
* @param helperContext
* @param dataType
* @return
*/
private static boolean register(HelperContext helperContext, DataType dataType) {
if (dataType == null) {
return false;
}
String db = dataType.getDataBinding();
boolean found = false;
if (DataBinding.IDL_INPUT.equals(db) || DataBinding.IDL_OUTPUT.equals(db)
|| DataBinding.IDL_FAULT.equals(db)
|| SDODataBinding.NAME.equals(db)) {
Class javaType = dataType.getPhysical();
found = register(helperContext, javaType);
if (dataType.getLogical() instanceof DataType) {
DataType logical = (DataType)dataType.getLogical();
found = register(helperContext, logical.getPhysical()) || found;
}
if (dataType.getLogical() instanceof List) {
List types = (List)dataType.getLogical();
for (Object type : types) {
if (type instanceof DataType) {
found = register(helperContext, ((DataType)type)) || found;
}
}
}
}
return found;
}
/**
* FIXME: [rfeng] This is a hack to get the factory out a SDO class
* @param helperContext
* @param javaType
*/
private static boolean register(HelperContext helperContext, Class javaType) {
try {
Type type = helperContext.getTypeHelper().getType(javaType);
if (type != null && (!type.isDataType())) {
Method method = type.getClass().getMethod("getEPackage", new Class[] {});
Object factory = method.invoke(type, new Object[] {});
method = factory.getClass().getMethod("register", new Class[] {HelperContext.class});
method.invoke(factory, new Object[] {helperContext});
return true;
}
return false;
} catch (Exception e) {
throw new TransformationException(e);
}
}
public static HelperContext getDefaultHelperContext() {
// SDOUtil.createHelperContext();
return HelperProvider.getDefaultContext();
}
public static QName getElement(TransformationContext context) {
if (context == null) {
return SDODataBinding.ROOT_ELEMENT;
}
DataType<?> dataType = context.getTargetDataType();
Object logical = dataType.getLogical();
QName elementName = null;
if (logical instanceof XMLType) {
XMLType xmlType = (XMLType)logical;
QName element = xmlType.getElementName();
if (element != null) {
elementName = element;
}
}
if (elementName == null) {
// Try source type
dataType = context.getSourceDataType();
logical = dataType.getLogical();
if (logical instanceof XMLType) {
XMLType xmlType = (XMLType)logical;
QName element = xmlType.getElementName();
if (element != null) {
elementName = element;
}
}
}
if (elementName != null) {
return elementName;
} else {
return SDODataBinding.ROOT_ELEMENT;
}
}
}
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