diff options
Diffstat (limited to 'tags/java/sca/2.0-M2/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire')
3 files changed, 0 insertions, 727 deletions
diff --git a/tags/java/sca/2.0-M2/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataBindingRuntimeWireProcessor.java b/tags/java/sca/2.0-M2/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataBindingRuntimeWireProcessor.java deleted file mode 100644 index b41c7fb012..0000000000 --- a/tags/java/sca/2.0-M2/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataBindingRuntimeWireProcessor.java +++ /dev/null @@ -1,195 +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.util.List; - -import org.apache.tuscany.sca.assembly.ComponentReference; -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.FaultExceptionMapper; -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.invocation.Phase; -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; - private FaultExceptionMapper faultExceptionMapper; - - public DataBindingRuntimeWireProcessor(Mediator mediator, - DataBindingExtensionPoint dataBindings, - FaultExceptionMapper faultExceptionMapper) { - super(); - this.mediator = mediator; - this.dataBindings = dataBindings; - this.faultExceptionMapper = faultExceptionMapper; - } - - 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, - faultExceptionMapper); - } 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 (!isOnMessage(targetOperation) && isRemotable(chain, sourceOperation, targetOperation)) { - interceptor = - new PassByValueInterceptor(dataBindings, faultExceptionMapper, chain, targetOperation); - } - } - if (interceptor != null) { - String phase = - (wire.getSource().getContract() instanceof ComponentReference) ? Phase.REFERENCE_INTERFACE - : Phase.SERVICE_INTERFACE; - chain.addInterceptor(phase, interceptor); - } - } - - } - - /** - * FIXME: TUSCANY-2586, temporary work around till the JIRA is fixed to prevent - * the PassByValueInterceptor being used for services when the binding protocol - * doesn't need the copies done. - */ - protected boolean isOnMessage(Operation op) { - return "onMessage".equals(op.getName()); - } - - /** - * Pass-by-value copies are required if the interfaces are remotable unless the - * implementation uses the @AllowsPassByReference annotation. - */ - protected boolean isRemotable(InvocationChain chain, Operation sourceOperation, Operation targetOperation) { - if (!sourceOperation.getInterface().isRemotable()) { - return false; - } - if (!targetOperation.getInterface().isRemotable()) { - return false; - } - return true; - } - -} diff --git a/tags/java/sca/2.0-M2/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java b/tags/java/sca/2.0-M2/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java deleted file mode 100644 index 20dcb1b94a..0000000000 --- a/tags/java/sca/2.0-M2/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java +++ /dev/null @@ -1,264 +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.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.oasisopen.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; - - 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; - } - - 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<T>>? - DataType<DataType> targetType = - new DataTypeImpl<DataType>(DataBinding.IDL_OUTPUT, Object.class, targetOperation.getOutputType()); - - DataType<DataType> sourceType = - new DataTypeImpl<DataType>(DataBinding.IDL_OUTPUT, Object.class, sourceOperation.getOutputType()); - - if (resultMsg.isFault()) { - - // FIXME: We need to figure out what fault type it is and then - // transform it - // back the source fault type - // throw new InvocationRuntimeException((Throwable) result); - - if ((result instanceof Exception) && !(result instanceof RuntimeException)) { - // FIXME: How to match fault data to a fault type for the - // operation? - - // If the result is from an InvocationTargetException look at - // the actual cause. - if (result instanceof InvocationTargetException) { - result = ((InvocationTargetException)result).getCause(); - } - DataType targetDataType = null; - for (DataType exType : targetOperation.getFaultTypes()) { - if (((Class)exType.getPhysical()).isInstance(result)) { - if (result instanceof FaultException) { - DataType faultType = (DataType)exType.getLogical(); - if (((FaultException)result).isMatchingType(faultType.getLogical())) { - targetDataType = exType; - break; - } - } else { - targetDataType = exType; - break; - } - } - } - - /* - if (targetDataType == null) { - // Not a business exception - return resultMsg; - } - */ - - DataType targetFaultType = getFaultType(targetDataType); - if (targetFaultType == null) { - // No matching fault type, it's a system exception - Throwable cause = (Throwable) result; - throw new ServiceRuntimeException(cause); - } - - // FIXME: How to match a source fault type to a target fault - // type? - DataType sourceDataType = null; - DataType sourceFaultType = null; - for (DataType exType : sourceOperation.getFaultTypes()) { - DataType faultType = getFaultType(exType); - // Match by the QName (XSD element) of the fault type - if (faultType != null && typesMatch(targetFaultType.getLogical(), faultType.getLogical())) { - sourceDataType = exType; - sourceFaultType = faultType; - break; - } - } - - if (sourceFaultType == null) { - // No matching fault type, it's a system exception - Throwable cause = (Throwable) result; - throw new ServiceRuntimeException(cause); - } - - Object newResult = - transformException(result, targetDataType, sourceDataType, targetFaultType, sourceFaultType); - if (newResult != result) { - resultMsg.setFaultBody(newResult); - } - } - - } else { - assert !(result instanceof Throwable) : "Expected messages that are not throwable " + result; - - Object newResult = transform(result, targetType, sourceType, true); - if (newResult != result) { - 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<String, Object> metadata = new HashMap<String, Object>(); - 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); - } - - private DataType getFaultType(DataType exceptionType) { - return exceptionType == null ? null : (DataType)exceptionType.getLogical(); - } - - private boolean typesMatch(Object first, Object second) { - if (first.equals(second)) { - return true; - } - if (first instanceof XMLType && second instanceof XMLType) { - XMLType t1 = (XMLType)first; - XMLType t2 = (XMLType)second; - // TUSCANY-2113, we should compare element names only - return matches(t1.getElementName(), t2.getElementName()); - } - return false; - } - - /** - * @param qn1 - * @param qn2 - */ - private boolean matches(QName qn1, QName qn2) { - if (qn1 == qn2) { - return true; - } - if (qn1 == null || qn2 == null) { - return false; - } - String ns1 = qn1.getNamespaceURI(); - String ns2 = qn2.getNamespaceURI(); - String e1 = qn1.getLocalPart(); - String e2 = qn2.getLocalPart(); - if (e1.equals(e2) && (ns1.equals(ns2) || ns1.equals(ns2 + "/") || ns2.equals(ns1 + "/"))) { - // Tolerating the trailing / which is required by JAX-WS java package --> xml ns mapping - return true; - } - return false; - } - - /** - * @param source The source exception - * @param sourceExType The data type for the source exception - * @param targetExType The data type for the target exception - * @param sourceType The fault type for the source - * @param targetType The fault type for the target - * @return - */ - private Object transformException(Object source, - DataType sourceExType, - DataType targetExType, - DataType sourceType, - DataType targetType) { - if (sourceType == targetType || (sourceType != null && sourceType.equals(targetType))) { - return source; - } - Map<String, Object> metadata = new HashMap<String, Object>(); - metadata.put("source.operation", targetOperation); - metadata.put("target.operation", sourceOperation); - metadata.put("wire", wire); - DataType<DataType> eSourceDataType = - new DataTypeImpl<DataType>("idl:fault", sourceExType.getPhysical(), sourceType); - DataType<DataType> eTargetDataType = - new DataTypeImpl<DataType>("idl:fault", targetExType.getPhysical(), targetType); - - return mediator.mediate(source, eSourceDataType, eTargetDataType, metadata); - } - - public void setNext(Invoker next) { - this.next = next; - } - - public boolean allowsPassByReference() { - return true; - } - -} diff --git a/tags/java/sca/2.0-M2/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/PassByValueInterceptor.java b/tags/java/sca/2.0-M2/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/PassByValueInterceptor.java deleted file mode 100644 index 1ff8d86f45..0000000000 --- a/tags/java/sca/2.0-M2/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/PassByValueInterceptor.java +++ /dev/null @@ -1,268 +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.io.Serializable; -import java.lang.reflect.Array; -import java.lang.reflect.InvocationTargetException; -import java.lang.reflect.Method; -import java.net.URI; -import java.util.IdentityHashMap; -import java.util.List; -import java.util.Map; -import java.util.UUID; - -import javax.xml.namespace.QName; - -import org.apache.tuscany.sca.databinding.DataBinding; -import org.apache.tuscany.sca.databinding.DataBindingExtensionPoint; -import org.apache.tuscany.sca.databinding.javabeans.JavaBeansDataBinding; -import org.apache.tuscany.sca.databinding.jaxb.JAXBDataBinding; -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.XMLType; -import org.apache.tuscany.sca.invocation.Interceptor; -import org.apache.tuscany.sca.invocation.InvocationChain; -import org.apache.tuscany.sca.invocation.Invoker; -import org.apache.tuscany.sca.invocation.Message; -import org.oasisopen.sca.ServiceRuntimeException; - -/** - * Implementation of an interceptor that enforces pass-by-value semantics - * on operation invocations by copying the operation input and output data. - * - * @version $Rev$ $Date$ - */ -public class PassByValueInterceptor implements Interceptor { - - private DataBindingExtensionPoint dataBindings; - private FaultExceptionMapper faultExceptionMapper; - - private DataBinding[] inputDataBindings; - private DataBinding outputDataBinding; - private DataBinding javaBeanDataBinding; - private DataBinding jaxbDataBinding; - private Operation operation; - private Invoker nextInvoker; - private InvocationChain chain; - - /** - * Constructs a new PassByValueInterceptor. - * @param dataBindings databinding extension point - * @param operation the intercepted operation - */ - public PassByValueInterceptor(DataBindingExtensionPoint dataBindings, - FaultExceptionMapper faultExceptionMapper, - InvocationChain chain, - Operation operation) { - this.chain = chain; - this.operation = operation; - - // Cache data bindings to use - this.dataBindings = dataBindings; - this.faultExceptionMapper = faultExceptionMapper; - - jaxbDataBinding = dataBindings.getDataBinding(JAXBDataBinding.NAME); - javaBeanDataBinding = dataBindings.getDataBinding(JavaBeansDataBinding.NAME); - - // Determine the input databindings - if (operation.getInputType() != null) { - List<DataType> inputTypes = operation.getInputType().getLogical(); - inputDataBindings = new DataBinding[inputTypes.size()]; - int i = 0; - for (DataType inputType : inputTypes) { - String id = inputType.getDataBinding(); - inputDataBindings[i++] = dataBindings.getDataBinding(id); - } - } - - // Determine the output databinding - if (operation.getOutputType() != null) { - String id = operation.getOutputType().getDataBinding(); - outputDataBinding = dataBindings.getDataBinding(id); - } - } - - public Message invoke(Message msg) { - if (chain.allowsPassByReference()) { - return nextInvoker.invoke(msg); - } - - msg.setBody(copy((Object[])msg.getBody(), inputDataBindings, operation.getInputType().getLogical())); - - Message resultMsg = nextInvoker.invoke(msg); - - if (!msg.isFault() && operation.getOutputType() != null) { - resultMsg.setBody(copy(resultMsg.getBody(), outputDataBinding, operation.getOutputType())); - } - - if (msg.isFault()) { - msg.setFaultBody(copyFault(msg.getBody())); - } - return resultMsg; - } - - private Object copyFault(Object fault) { - if (faultExceptionMapper == null) { - return fault; - } - for (DataType et : operation.getFaultTypes()) { - if (et.getPhysical().isInstance(fault)) { - Throwable ex = (Throwable)fault; - DataType<DataType> exType = - new DataTypeImpl<DataType>(ex.getClass(), new DataTypeImpl<XMLType>(ex.getClass(), XMLType.UNKNOWN)); - faultExceptionMapper.introspectFaultDataType(exType, operation, false); - DataType faultType = exType.getLogical(); - Object faultInfo = faultExceptionMapper.getFaultInfo(ex, faultType.getPhysical(), operation); - faultInfo = copy(faultInfo, dataBindings.getDataBinding(faultType.getDataBinding()), faultType); - fault = faultExceptionMapper.wrapFaultInfo(exType, ex.getMessage(), faultInfo, ex.getCause(), operation); - return fault; - } - } - return fault; - } - - /** - * Copy an array of data objects passed to an operation - * @param data array of objects to copy - * @return the copy - */ - private Object[] copy(Object[] data, DataBinding[] dataBindings, List<DataType> dataTypes) { - if (data == null) { - return null; - } - Object[] copy = new Object[data.length]; - Map<Object, Object> map = new IdentityHashMap<Object, Object>(); - for (int i = 0; i < data.length; i++) { - Object arg = data[i]; - if (arg == null) { - copy[i] = null; - } else { - Object copiedArg = map.get(arg); - if (copiedArg != null) { - copy[i] = copiedArg; - } else { - copiedArg = copy(arg, dataBindings[i], dataTypes.get(i)); - map.put(arg, copiedArg); - copy[i] = copiedArg; - } - } - } - return copy; - } - - /** - * Copy data using the specified databinding. - * @param data input data - * @param dataBinding databinding to use - * @param dataType TODO - * @return a copy of the data - */ - private Object copy(Object data, DataBinding dataBinding, DataType dataType) { - if (data == null) { - return null; - } - Class<?> clazz = data.getClass(); - if (String.class == clazz || clazz.isPrimitive() - || Number.class.isAssignableFrom(clazz) - || Boolean.class.isAssignableFrom(clazz) - || Character.class.isAssignableFrom(clazz) - || Byte.class.isAssignableFrom(clazz) - || URI.class == clazz - || UUID.class == clazz - || QName.class == clazz) { - // Immutable classes - return data; - } - // If no databinding was specified, introspect the given arg to - // determine its databinding - if (dataBinding == null) { - dataType = dataBindings.introspectType(data, operation); - if (dataType != null) { - String db = dataType.getDataBinding(); - dataBinding = dataBindings.getDataBinding(db); - if (dataBinding == null && db != null) { - return data; - } - } - if (dataBinding == null) { - - // Default to the JavaBean databinding - dataBinding = javaBeanDataBinding; - } - } - - // Use the JAXB databinding to copy non-Serializable data - if (dataBinding == javaBeanDataBinding) { - - // If the input data is an array containing non Serializable elements - // use JAXB - clazz = data.getClass(); - if (clazz.isArray()) { - if (Array.getLength(data) != 0) { - Object element = Array.get(data, 0); - if (element != null && !(element instanceof Serializable)) { - dataBinding = jaxbDataBinding; - } - } - } else { - - // If the input data is not Serializable use JAXB - if (!(data instanceof Serializable)) { - dataBinding = jaxbDataBinding; - } - - if (data instanceof Cloneable) { - Method clone; - try { - clone = data.getClass().getMethod("clone", (Class[])null); - try { - return clone.invoke(data, (Object[])null); - } catch (InvocationTargetException e) { - if (e.getTargetException() instanceof CloneNotSupportedException) { - // Ignore - } else { - throw new ServiceRuntimeException(e); - } - } catch (Exception e) { - throw new ServiceRuntimeException(e); - } - } catch (NoSuchMethodException e) { - // Ignore it - } - } - } - } - - Object copy = dataBinding.copy(data, dataType, operation); - return copy; - } - - public Invoker getNext() { - return nextInvoker; - } - - public void setNext(Invoker next) { - this.nextInvoker = next; - } - -} |