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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.impl.reference;
import java.util.ArrayList;
import java.util.List;
import org.apache.tuscany.sca.binding.corba.exceptions.CorbaException;
import org.apache.tuscany.sca.binding.corba.exceptions.RequestConfigurationException;
import org.apache.tuscany.sca.binding.corba.types.TypeTree;
import org.apache.tuscany.sca.binding.corba.types.TypeTreeCreator;
import org.apache.tuscany.sca.binding.corba.types.util.TypeHelpersProxy;
import org.omg.CORBA.BAD_OPERATION;
import org.omg.CORBA.Object;
import org.omg.CORBA.SystemException;
import org.omg.CORBA.portable.ApplicationException;
import org.omg.CORBA.portable.InputStream;
import org.omg.CORBA.portable.ObjectImpl;
import org.omg.CORBA.portable.OutputStream;
/**
* @version $Rev$ $Date$ Represents single CORBA request
*/
public class DynaCorbaRequest {
private TypeTree returnTree;
private List<TypeTree> arguments = new ArrayList<TypeTree>();
private List<TypeTree> exceptions = new ArrayList<TypeTree>();
private OutputStream outputStream;
private ObjectImpl remoteObject;
private String operation;
/**
* Creates request.
*
* @param ObjectremoteObject
* remote object reference
* @param operation
* operation to invoke
*/
public DynaCorbaRequest(Object remoteObject, String operation) {
outputStream = ((ObjectImpl) remoteObject)._request(operation, true);
this.remoteObject = (ObjectImpl) remoteObject;
this.operation = operation;
}
/**
* Adds operation argument
*
* @param argument
*/
public void addArgument(java.lang.Object argument) {
TypeTree tree = TypeTreeCreator.createTypeTree(argument.getClass());
TypeHelpersProxy.write(tree.getRootNode(), outputStream, argument);
}
/**
* Sets return type for operation
*
* @param forClass
*/
public void setOutputType(Class<?> forClass) {
returnTree = TypeTreeCreator.createTypeTree(forClass);
}
/**
* Configures possible exceptions
*
* @param forClass
*/
public void addExceptionType(Class<?> forClass) {
TypeTree tree = TypeTreeCreator.createTypeTree(forClass);
exceptions.add(tree);
}
/**
* Handles application excpeition.
*
* @param ae
* occured exception
* @throws Exception
*/
private void handleApplicationException(ApplicationException ae)
throws Exception {
try {
if (exceptions.size() == 0) {
RequestConfigurationException exception = new RequestConfigurationException(
"ApplicationException occured, but no exception type was specified.",
ae.getId());
throw exception;
} else if (exceptions.size() == 1) {
InputStream is = ae.getInputStream();
is.read_string();
TypeTree tree = exceptions.get(0);
Exception userExc = (Exception) TypeHelpersProxy.read(tree
.getRootNode(), is);
//TODO: handle errors during blind exception creation
throw userExc;
} else if (exceptions.size() > 1) {
RequestConfigurationException exception = new RequestConfigurationException(
"ApplicationException occured, but user specified more than one exception type. Cannot distinguish type of occured exception.",
ae.getId());
throw exception;
}
} catch (Exception e) {
throw e;
}
}
/**
* Handles exceptions generated by CORBA API
*
* @param se
*/
private void handleSystemException(SystemException se) throws Exception {
if (se instanceof BAD_OPERATION) {
throw new CorbaException("Bad operation name: " + operation, se);
} else {
//TODO: handle more system exception types
throw new CorbaException(se.getMessage(), se);
}
}
/**
* Invokes previously configured request
*
* @return
*/
public DynaCorbaResponse invoke() throws Exception {
DynaCorbaResponse response = new DynaCorbaResponse();
InputStream is = null;
try {
is = remoteObject._invoke(outputStream);
if (is != null && returnTree != null) {
response.setContent(TypeHelpersProxy.read(returnTree
.getRootNode(), is));
}
} catch (ApplicationException ae) {
handleApplicationException(ae);
} catch (SystemException se) {
handleSystemException(se);
} catch (Exception e) {
throw e;
}
return response;
}
}
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