diff options
author | jsdelfino <jsdelfino@13f79535-47bb-0310-9956-ffa450edef68> | 2010-09-07 23:52:54 +0000 |
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committer | jsdelfino <jsdelfino@13f79535-47bb-0310-9956-ffa450edef68> | 2010-09-07 23:52:54 +0000 |
commit | d123827b572d59f86e23d4e7fac42864d646ee60 (patch) | |
tree | e85a7e9a64391cf9b11830b5b6654dd51185be0d /sandbox/sebastien/java/shell/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java | |
parent | ba5e7230636b321793db90d642b066b423d59c34 (diff) |
Sandbox to experiment with deployment and management commands.
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@993560 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'sandbox/sebastien/java/shell/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java')
-rw-r--r-- | sandbox/sebastien/java/shell/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/sandbox/sebastien/java/shell/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java b/sandbox/sebastien/java/shell/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java new file mode 100644 index 0000000000..de29088c1d --- /dev/null +++ b/sandbox/sebastien/java/shell/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java @@ -0,0 +1,98 @@ +/* + * 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.util.HashMap; +import java.util.Map; + +import org.apache.tuscany.sca.databinding.Mediator; +import org.apache.tuscany.sca.interfacedef.Operation; +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.Invocable; + +/** + * An interceptor to transform data across databindings on the wire + * + * @version $Rev$ $Date$ + */ +public class DataTransformationInterceptor implements Interceptor { + private Invoker next; + + private Operation sourceOperation; + + private Operation targetOperation; + private Invocable invocable; + private Mediator mediator; + + public DataTransformationInterceptor(Invocable invocable, + Operation sourceOperation, + Operation targetOperation, + Mediator mediator) { + super(); + this.sourceOperation = sourceOperation; + this.targetOperation = targetOperation; + this.mediator = mediator; + this.invocable = invocable; + } + + public Invoker getNext() { + return next; + } + + public Message invoke(Message msg) { + Map<String, Object> metadata = new HashMap<String, Object>(); + metadata.put(Invocable.class.getName(), invocable); + Object input = mediator.mediateInput(msg.getBody(), sourceOperation, targetOperation, metadata); + msg.setBody(input); + Message resultMsg = next.invoke(msg); + Object result = resultMsg.getBody(); + if (sourceOperation.isNonBlocking()) { + // Not to reset the message body + return resultMsg; + } + + if (resultMsg.isFault()) { + Object transformedFault = null; + if ((result instanceof Exception) && !(result instanceof RuntimeException)) { + transformedFault = mediator.mediateFault(result, sourceOperation, targetOperation, metadata); + if (transformedFault != result) { + resultMsg.setFaultBody(transformedFault); + } + } + // + // Leave it to another layer to actually throw the Exception which constitutes + // the message body. We don't throw it here. + // + } else { + assert !(result instanceof Throwable) : "Expected messages that are not throwable " + result; + Object newResult = mediator.mediateOutput(result, sourceOperation, targetOperation, metadata); + resultMsg.setBody(newResult); + } + + return resultMsg; + } + + public void setNext(Invoker next) { + this.next = next; + } + +} |