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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.ParameterizedType;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Collection;
import javax.xml.namespace.QName;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.databinding.BaseDataBinding;
import org.apache.tuscany.sca.databinding.WrapperHandler;
import org.apache.tuscany.sca.databinding.XMLTypeHelper;
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.DataObject;
import commonj.sdo.Type;
import commonj.sdo.helper.CopyHelper;
import commonj.sdo.helper.HelperContext;
import commonj.sdo.helper.XMLDocument;
/**
* SDO Databinding
*
* @version $Rev$ $Date$
*/
public class SDODataBinding extends BaseDataBinding {
public static final String NAME = DataObject.class.getName();
public static final String ROOT_NAMESPACE = "commonj.sdo";
public static final QName ROOT_ELEMENT = new QName(ROOT_NAMESPACE, "dataObject");
private WrapperHandler<Object> wrapperHandler;
private XMLTypeHelper xmlTypeHelper;
public SDODataBinding( ExtensionPointRegistry registry ) {
super(NAME, DataObject.class);
SDOContextHelper.setRegistry( registry );
wrapperHandler = new SDOWrapperHandler();
xmlTypeHelper = new SDOTypeHelper();
}
@Override
public boolean introspect(DataType dataType, final Operation operation) {
Class javaType = dataType.getPhysical();
// Allow privileged access to read system properties. Requires PropertyPermission
// java.specification.version read in security policy.
final HelperContext context = AccessController.doPrivileged(new PrivilegedAction<HelperContext>() {
public HelperContext run() {
return SDOContextHelper.getHelperContext(operation);
}
});
final Type type = context.getTypeHelper().getType(javaType);
if (type == null) {
// FIXME: Need a better to test dynamic SDO
// TUSCANY-3298: get underlying element type for collections
boolean isMany = false;
if (Collection.class.isAssignableFrom(javaType)) {
java.lang.reflect.Type genericType = dataType.getGenericType();
if (genericType instanceof ParameterizedType) {
java.lang.reflect.Type actualType = ((ParameterizedType)genericType).getActualTypeArguments()[0];
if (actualType instanceof Class) {
javaType = (Class)actualType;
isMany = true;
}
}
}
if (DataObject.class.isAssignableFrom(javaType)) {
// Dynamic SDO
dataType.setDataBinding(getName());
// TUSCANY-3298: use XMLType many value to indicate a collection
Object logical = dataType.getLogical();
if (logical == null) {
if (!isMany) {
dataType.setLogical(XMLType.UNKNOWN);
} else {
XMLType xmlType = new XMLType(null, null);
xmlType.setMany(true);
dataType.setLogical(xmlType);
}
} else if (logical instanceof XMLType && isMany) {
((XMLType)logical).setMany(true);
}
return true;
}
return false;
}
if (type.isDataType()) {
// FIXME: Ignore simple types?
return false;
}
// Found a SDO type, replace the default context with a private one
AccessController.doPrivileged(new PrivilegedAction<Object>() {
public Object run() {
if (context == SDOContextHelper.getDefaultHelperContext()) {
HelperContext newContext = SDOUtil.createHelperContext();
SDOContextHelper.register(newContext, type);
if (operation != null) {
operation.getInputType().setMetaData(HelperContext.class, newContext);
}
} else {
SDOContextHelper.register(context, type);
}
return null;
}
});
String namespace = type.getURI();
String name = context.getXSDHelper().getLocalName(type);
QName xmlType = new QName(namespace, name);
dataType.setDataBinding(getName());
QName elementName = null;
Object logical = dataType.getLogical();
if (logical instanceof XMLType) {
elementName = ((XMLType)logical).getElementName();
}
dataType.setLogical(new XMLType(elementName, xmlType));
return true;
}
@Override
public WrapperHandler getWrapperHandler() {
return wrapperHandler;
}
@Override
public XMLTypeHelper getXMLTypeHelper() {
// return new SDOTypeHelper();
return xmlTypeHelper;
}
@Override
public Object copy(Object arg, DataType dataType, DataType targetDataType, Operation operation, Operation targetOperation) {
HelperContext context = SDOContextHelper.getHelperContext(operation);
CopyHelper copyHelper = context.getCopyHelper();
if (arg instanceof XMLDocument) {
XMLDocument document = (XMLDocument)arg;
DataObject dataObject = copyHelper.copy(document.getRootObject());
return context.getXMLHelper().createDocument(dataObject,
document.getRootElementURI(),
document.getRootElementName());
} else if (arg instanceof DataObject) {
return context.getCopyHelper().copy((DataObject)arg);
} else {
return super.copy(arg, dataType, targetDataType, operation, targetOperation);
}
}
}
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