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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 javax.xml.namespace.QName;
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.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 = SDOUtil.createHelperContext();
Class javaType = context.getTargetDataType().getPhysical();
boolean found = register(helperContext, javaType);
javaType = context.getSourceDataType().getPhysical();
found = found || register(helperContext, javaType);
if (found) {
return helperContext;
} else {
return getDefaultHelperContext();
}
}
/**
* 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(DataType<?> dataType) {
Object logical = dataType.getLogical();
QName elementName = SDODataBinding.ROOT_ELEMENT;
if (logical instanceof XMLType) {
XMLType xmlType = (XMLType)logical;
QName element = xmlType.getElementName();
if (element != null) {
elementName = element;
}
}
return elementName;
}
}
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