diff options
Diffstat (limited to 'branches/sca-java-1.0.1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataBindingRuntimeWireProcessor.java')
-rw-r--r-- | branches/sca-java-1.0.1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataBindingRuntimeWireProcessor.java | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/branches/sca-java-1.0.1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataBindingRuntimeWireProcessor.java b/branches/sca-java-1.0.1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataBindingRuntimeWireProcessor.java deleted file mode 100644 index d0a2dbc003..0000000000 --- a/branches/sca-java-1.0.1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataBindingRuntimeWireProcessor.java +++ /dev/null @@ -1,220 +0,0 @@ -/* - * 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.Method; -import java.util.List; - -import org.apache.tuscany.sca.assembly.Implementation; -import org.apache.tuscany.sca.databinding.DataBindingExtensionPoint; -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.Interceptor; -import org.apache.tuscany.sca.invocation.InvocationChain; -import org.apache.tuscany.sca.runtime.RuntimeComponent; -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; - private DataBindingExtensionPoint dataBindings; - - public DataBindingRuntimeWireProcessor(Mediator mediator, DataBindingExtensionPoint dataBindings) { - super(); - this.mediator = mediator; - this.dataBindings = dataBindings; - } - - public boolean isTransformationRequired(DataType source, DataType target) { - if (source == null || target == null) { // void return type - return false; - } - if (source == target) { - return false; - } - - // Output type can be null - if (source == null && target == null) { - return false; - } else if (source == null || target == null) { - return true; - } - String sourceDataBinding = source.getDataBinding(); - String targetDataBinding = target.getDataBinding(); - if (sourceDataBinding == targetDataBinding) { - return false; - } - if (sourceDataBinding == null || targetDataBinding == null) { - // TODO: If any of the databinding is null, then no transformation - return false; - } - return !sourceDataBinding.equals(targetDataBinding); - } - - public boolean isTransformationRequired(Operation source, Operation target) { - if (source == target) { - return false; - } - - if (source.isWrapperStyle() != target.isWrapperStyle()) { - return true; - } - - // 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(); - if (size != targetInputType.size()) { - // TUSCANY-1682: The wrapper style may have different arguments - return true; - } - 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.getInterface().isRemotable()) { - return; - } - List<InvocationChain> chains = wire.getInvocationChains(); - for (InvocationChain chain : chains) { - Operation sourceOperation = chain.getSourceOperation(); - Operation targetOperation = chain.getTargetOperation(); - - Interceptor interceptor = null; - if (isTransformationRequired(sourceContract, sourceOperation, targetContract, targetOperation)) { - // Add the interceptor to the source side because multiple - // references can be wired to the same service - interceptor = new DataTransformationInterceptor(wire, sourceOperation, targetOperation, mediator); - } else { - // assume pass-by-values copies are required if interfaces are remotable and there is no data binding - // transformation, i.e. a transformation will result in a copy so another pass-by-value copy is unnecessary - if (requiresCopy(wire, sourceOperation, targetOperation)) { - interceptor = new PassByValueInterceptor(dataBindings, targetOperation); - } - } - if (interceptor != null) { - chain.addInterceptor(0, interceptor); - } - } - - } - - /** - * Pass-by-value copies are required if the interfaces are remotable unless the - * implementation uses the @AllowsPassByReference annotation. - */ - protected boolean requiresCopy(RuntimeWire wire, Operation sourceOperation, Operation targetOperation) { - if (!sourceOperation.getInterface().isRemotable()) { - return false; - } - if (!targetOperation.getInterface().isRemotable()) { - return false; - } - - if (allowsPassByReference(wire.getSource().getComponent(), sourceOperation)) { - return false; - } - - if (allowsPassByReference(wire.getTarget().getComponent(), sourceOperation)) { - return false; - } - - return true; - } - - /** - * Does the implementation use the @AllowsPassByReference annotation for the operation. - * Uses reflection to avoid a dependency on JavaImplementation because the isAllowsPassByReference - * and getAllowsPassByReference methods are not on the Implementation interface. - * TODO: move isAllowsPassByReference/getAllowsPassByReference to Implementation interface - */ - protected boolean allowsPassByReference(RuntimeComponent component, Operation operation) { - if (component == null || component.getImplementation() == null) { - return true; // err on the side of no copies - } - Implementation impl = component.getImplementation(); - try { - - Method m = impl.getClass().getMethod("isAllowsPassByReference", new Class[] {}); - if ((Boolean)m.invoke(impl, new Object[]{})) { - return true; - } - - m = impl.getClass().getMethod("getAllowsPassByReferenceMethods", new Class[] {}); - List<Method> ms = (List<Method>)m.invoke(impl, new Object[]{}); - if (ms != null) { - for (Method m2 : ms) { - // simple name matching is ok as its a remote operation so no overloading - if (operation.getName().equals(m2.getName())) - return true; - } - } - - } catch (Exception e) { - // ignore, assume the impl has no isAllowsPassByReference method - } - - return false; - } - -} |