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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.binding.corba.provider.types.util;
import java.lang.reflect.Field;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.tuscany.sca.binding.corba.provider.types.TypeTreeNode;
import org.apache.tuscany.sca.binding.corba.provider.types.UnionAttributes;
import org.omg.CORBA.portable.InputStream;
import org.omg.CORBA.portable.OutputStream;
/**
* @version $Rev$ $Date$
*/
public class UnionTypeHelper implements TypeHelper {
private static final Logger logger = Logger.getLogger(UnionTypeHelper.class.getName());
public Object read(TypeTreeNode node, InputStream is) {
Object result = null;
try {
int discriminator = is.read_long();
UnionAttributes attrs = (UnionAttributes)node.getAttributes();
String childName = attrs.getOptionsMapping().get(discriminator);
if (childName == null) {
// get default if option numbers field not found
childName = attrs.getDefaultOptionName();
}
result = node.getJavaClass().newInstance();
Field discField = result.getClass().getDeclaredField(attrs.getDiscriminatorName());
discField.setAccessible(true);
discField.set(result, discriminator);
for (int i = 0; i < node.getChildren().length; i++) {
if (node.getChildren()[i].getName().equals(childName)) {
Object unionValue = TypeHelpersProxy.read(node.getChildren()[i], is);
Field childField = result.getClass().getDeclaredField(childName);
childField.setAccessible(true);
childField.set(result, unionValue);
break;
}
}
} catch (Exception e) {
logger.log(Level.WARNING, "Exception during reading CORBA union data", e);
}
return result;
}
public void write(TypeTreeNode node, OutputStream os, Object data) {
try {
UnionAttributes attrs = (UnionAttributes)node.getAttributes();
Field discriminatorField = data.getClass().getDeclaredField(attrs.getDiscriminatorName());
discriminatorField.setAccessible(true);
int discriminator = discriminatorField.getInt(data);
os.write_long(discriminator);
String childName = attrs.getOptionsMapping().get(discriminator);
if (childName == null) {
// get default if option numbers field not found
childName = attrs.getDefaultOptionName();
}
for (int i = 0; i < node.getChildren().length; i++) {
if (node.getChildren()[i].getName().equals(childName)) {
Field childField = data.getClass().getDeclaredField(childName);
childField.setAccessible(true);
TypeHelpersProxy.write(node.getChildren()[i], os, childField.get(data));
break;
}
}
} catch (Exception e) {
logger.log(Level.WARNING, "Exception during writing CORBA union data", e);
}
}
}
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