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Diffstat (limited to 'sca-java-1.x/branches/sca-java-0.91/modules/core-databinding/src/main/java/org/apache/tuscany/core/databinding/wire/DataBindingRuntimeWireProcessor.java')
-rw-r--r-- | sca-java-1.x/branches/sca-java-0.91/modules/core-databinding/src/main/java/org/apache/tuscany/core/databinding/wire/DataBindingRuntimeWireProcessor.java | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-0.91/modules/core-databinding/src/main/java/org/apache/tuscany/core/databinding/wire/DataBindingRuntimeWireProcessor.java b/sca-java-1.x/branches/sca-java-0.91/modules/core-databinding/src/main/java/org/apache/tuscany/core/databinding/wire/DataBindingRuntimeWireProcessor.java new file mode 100644 index 0000000000..feaf48f501 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-0.91/modules/core-databinding/src/main/java/org/apache/tuscany/core/databinding/wire/DataBindingRuntimeWireProcessor.java @@ -0,0 +1,150 @@ +/* + * 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.core.databinding.wire; + +import java.util.List; + +import org.apache.tuscany.sca.databinding.Mediator; +import org.apache.tuscany.sca.interfacedef.DataType; +import org.apache.tuscany.sca.interfacedef.InterfaceContract; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.invocation.InvocationChain; +import org.apache.tuscany.sca.runtime.RuntimeWire; +import org.apache.tuscany.sca.runtime.RuntimeWireProcessor; + +/** + * This processor is responsible to add an interceptor to invocation chain if + * the source and target operations have different databinding requirements + * + * @version $Rev$ $Date$ + */ +public class DataBindingRuntimeWireProcessor implements RuntimeWireProcessor { + private Mediator mediator; + + public DataBindingRuntimeWireProcessor(Mediator mediator) { + super(); + this.mediator = mediator; + } + + public boolean isTransformationRequired(DataType source, DataType target) { + if (source == target) { + return false; + } + String sourceDataBinding = source.getDataBinding(); + String targetDataBinding = target.getDataBinding(); + if (sourceDataBinding == targetDataBinding) { + return false; + } + if (sourceDataBinding == null || targetDataBinding == null) { + return true; + } + return !sourceDataBinding.equals(targetDataBinding); + } + + public boolean isTransformationRequired(Operation source, Operation target) { + if (source == target) { + return false; + } + + // Check output type + DataType sourceOutputType = source.getOutputType(); + DataType targetOutputType = target.getOutputType(); + + // Note the target output type is now the source for checking + // compatibility + if (isTransformationRequired(targetOutputType, sourceOutputType)) { + return true; + } + + List<DataType> sourceInputType = source.getInputType().getLogical(); + List<DataType> targetInputType = target.getInputType().getLogical(); + + int size = sourceInputType.size(); + for (int i = 0; i < size; i++) { + if (isTransformationRequired(sourceInputType.get(i), targetInputType.get(i))) { + return true; + } + } + + return false; + } + + private boolean isTransformationRequired(InterfaceContract sourceContract, + Operation sourceOperation, + InterfaceContract targetContract, + Operation targetOperation) { + if (targetContract == null) { + targetContract = sourceContract; + } + if (sourceContract == targetContract) { + return false; + } + return isTransformationRequired(sourceOperation, targetOperation); + } + + public void process(RuntimeWire wire) { + InterfaceContract sourceContract = wire.getSource().getInterfaceContract(); + InterfaceContract targetContract = wire.getTarget().getInterfaceContract(); + if (targetContract == null) { + targetContract = sourceContract; + } + if (sourceContract == targetContract) { + return; + } + List<InvocationChain> chains = wire.getInvocationChains(); + for (InvocationChain chain : chains) { + Operation sourceOperation = chain.getSourceOperation(); + Operation targetOperation = chain.getTargetOperation(); + + if (isTransformationRequired(sourceContract, sourceOperation, targetContract, targetOperation)) { + // Add the interceptor to the source side because multiple + // references can be wired + // to the same service + DataTransformationInteceptor interceptor = new DataTransformationInteceptor(wire, sourceOperation, + targetOperation); + interceptor.setMediator(mediator); + chain.addInterceptor(0, interceptor); + } + } + + // Object targetAddress = UriHelper.getBaseName(source.getUri()); + List<InvocationChain> callbackChains = wire.getCallbackInvocationChains(); + if (callbackChains == null) { + // callback chains could be null + return; + } + + for (InvocationChain chain : callbackChains) { + Operation sourceOperation = chain.getSourceOperation(); + Operation targetOperation = chain.getTargetOperation(); + if (isTransformationRequired(sourceContract, sourceOperation, targetContract, targetOperation)) { + + // Add the interceptor to the source side because multiple + // references can be wired + // to the same service + DataTransformationInteceptor interceptor = new DataTransformationInteceptor(wire, sourceOperation, + targetOperation); + interceptor.setMediator(mediator); + chain.addInterceptor(0, interceptor); + } + } + } + +} |