From 5a774754e30889efb10bbf99381ea979ce9c9b9f Mon Sep 17 00:00:00 2001 From: scottkurz Date: Tue, 22 Jul 2008 18:33:36 +0000 Subject: Propose refactoring of fault matching in core-databinding. git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@678849 13f79535-47bb-0310-9956-ffa450edef68 --- .../wire/DataTransformationInterceptor.java | 133 +++++++++++++++++++++ 1 file changed, 133 insertions(+) create mode 100644 sandbox/scottkurz/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java (limited to 'sandbox/scottkurz/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java') diff --git a/sandbox/scottkurz/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java b/sandbox/scottkurz/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java new file mode 100644 index 0000000000..89ce15e796 --- /dev/null +++ b/sandbox/scottkurz/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java @@ -0,0 +1,133 @@ +/* + * 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.core.databinding.wire; + +import java.lang.reflect.InvocationTargetException; +import java.util.HashMap; +import java.util.Map; + +import javax.xml.namespace.QName; + +import org.apache.tuscany.sca.databinding.DataBinding; +import org.apache.tuscany.sca.databinding.Mediator; +import org.apache.tuscany.sca.interfacedef.DataType; +import org.apache.tuscany.sca.interfacedef.FaultExceptionMapper; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.interfacedef.impl.DataTypeImpl; +import org.apache.tuscany.sca.interfacedef.util.FaultException; +import org.apache.tuscany.sca.interfacedef.util.XMLType; +import org.apache.tuscany.sca.invocation.DataExchangeSemantics; +import org.apache.tuscany.sca.invocation.Interceptor; +import org.apache.tuscany.sca.invocation.Invoker; +import org.apache.tuscany.sca.invocation.Message; +import org.apache.tuscany.sca.runtime.RuntimeWire; +import org.osoa.sca.ServiceRuntimeException; + +/** + * An interceptor to transform data across databindings on the wire + * + * @version $Rev$ $Date$ + */ +public class DataTransformationInterceptor implements Interceptor, DataExchangeSemantics { + private Invoker next; + + private Operation sourceOperation; + + private Operation targetOperation; + private RuntimeWire wire; + private Mediator mediator; + private FaultExceptionMapper faultExceptionMapper; + private FaultTransformHelper faultTransformHelper; + + public DataTransformationInterceptor(RuntimeWire wire, + Operation sourceOperation, + Operation targetOperation, + Mediator mediator, + FaultExceptionMapper faultExceptionMapper) { + super(); + this.sourceOperation = sourceOperation; + this.targetOperation = targetOperation; + this.mediator = mediator; + this.wire = wire; + this.faultExceptionMapper = faultExceptionMapper; + this.faultTransformHelper = new FaultTransformHelper(mediator); + } + + public Invoker getNext() { + return next; + } + + public Message invoke(Message msg) { + Object input = transform(msg.getBody(), sourceOperation.getInputType(), targetOperation.getInputType(), false); + msg.setBody(input); + Message resultMsg = next.invoke(msg); + Object result = resultMsg.getBody(); + if (sourceOperation.isNonBlocking()) { + // Not to reset the message body + return resultMsg; + } + + // FIXME: Should we fix the Operation model so that getOutputType + // returns DataType>? + DataType targetType = + new DataTypeImpl(DataBinding.IDL_OUTPUT, Object.class, targetOperation.getOutputType()); + + DataType sourceType = + new DataTypeImpl(DataBinding.IDL_OUTPUT, Object.class, sourceOperation.getOutputType()); + + if (resultMsg.isFault()) { + Object transformedFault = null; + if ((result instanceof Exception) && !(result instanceof RuntimeException)) { + transformedFault = faultTransformHelper.transformFault(result, sourceOperation, targetOperation, wire); + } + // Otherwise, we leave it to another layer to actually throw the RuntimeException which constitutes + // the message body. We don't throw it here. + if (transformedFault != result) { + resultMsg.setFaultBody(transformedFault); + } + } else { + assert !(result instanceof Throwable) : "Expected messages that are not throwable " + result; + Object newResult = transform(result, targetType, sourceType, true); + resultMsg.setBody(newResult); + } + + return resultMsg; + } + + private Object transform(Object source, DataType sourceType, DataType targetType, boolean isResponse) { + if (sourceType == targetType || (sourceType != null && sourceType.equals(targetType))) { + return source; + } + Map metadata = new HashMap(); + metadata.put("source.operation", isResponse ? targetOperation : sourceOperation); + metadata.put("target.operation", isResponse ? sourceOperation : targetOperation); + metadata.put("wire", wire); + return mediator.mediate(source, sourceType, targetType, metadata); + } + + public void setNext(Invoker next) { + this.next = next; + } + + public boolean allowsPassByReference() { + return true; + } + +} -- cgit v1.2.3