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Diffstat (limited to '')
-rw-r--r-- | sca-java-2.x/tags/2.0-Beta1-RC2/modules/interface-java/src/main/java/org/apache/tuscany/sca/interfacedef/java/impl/JavaInterfaceUtil.java | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0-Beta1-RC2/modules/interface-java/src/main/java/org/apache/tuscany/sca/interfacedef/java/impl/JavaInterfaceUtil.java b/sca-java-2.x/tags/2.0-Beta1-RC2/modules/interface-java/src/main/java/org/apache/tuscany/sca/interfacedef/java/impl/JavaInterfaceUtil.java new file mode 100644 index 0000000000..352cffeef2 --- /dev/null +++ b/sca-java-2.x/tags/2.0-Beta1-RC2/modules/interface-java/src/main/java/org/apache/tuscany/sca/interfacedef/java/impl/JavaInterfaceUtil.java @@ -0,0 +1,223 @@ +/* + * 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.interfacedef.java.impl; + +import java.lang.reflect.Method; +import java.lang.reflect.Type; +import java.util.ArrayList; +import java.util.Collection; +import java.util.List; + +import org.apache.tuscany.sca.interfacedef.DataType; +import org.apache.tuscany.sca.interfacedef.Interface; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.interfacedef.java.JavaInterface; +import org.apache.tuscany.sca.interfacedef.java.JavaOperation; + +/** + * Contains methods for mapping between an operation in a + * {@link org.apache.tuscany.spi.model.ServiceContract} and a method defined by + * a Java interface + * + * @version $Rev$ $Date$ + * @tuscany.spi.extension.asclient + */ +public final class JavaInterfaceUtil { + + private JavaInterfaceUtil() { + } + + /** + * Return the method on the implementation class that matches the operation. + * + * @param implClass the implementation class or interface + * @param operation the operation to match + * @return the method described by the operation + * @throws NoSuchMethodException if no such method exists + * @Deprecated + */ + public static Method findMethod(Class<?> implClass, Operation operation) throws NoSuchMethodException { + String name = operation.getName(); + if (operation instanceof JavaOperation) { + if( ((JavaOperation)operation).isAsyncServer() ) { + // In this case, the operation is a mapped async server style method and needs special handling + return findAsyncServerMethod( implClass, (JavaOperation)operation ); + } else { + name = ((JavaOperation)operation).getJavaMethod().getName(); + } // end if + } + Interface interface1 = operation.getInterface(); + int numParams = operation.getInputType().getLogical().size(); + if (interface1 != null && interface1.isRemotable()) { + List<Method> matchingMethods = new ArrayList<Method>(); + for (Method m : implClass.getMethods()) { + if (m.getName().equals(name) && m.getParameterTypes().length == numParams) { + matchingMethods.add(m); + } + } + + // TUSCANY-2180 If there is only one method then we just match on the name + // (this is the same as the existing behaviour) + if (matchingMethods.size() == 1) { + return matchingMethods.get(0); + } + if (matchingMethods.size() > 1) { + // TUSCANY-2180 We need to check the parameter types too + Class<?>[] paramTypes = getPhysicalTypes(operation); + return implClass.getMethod(name, paramTypes); + } + + // No matching method found + throw new NoSuchMethodException("No matching method for operation " + operation.getName() + + " is found on " + + implClass); + } + Class<?>[] paramTypes = getPhysicalTypes(operation); + return implClass.getMethod(name, paramTypes); + } + + /** + * Return the method on the implementation class that matches the async server version of the operation. + * + * @param implClass the implementation class or interface + * @param operation the operation to match - this is the sync equivalent of an async server operation + * @return the method described by the operation + * @throws NoSuchMethodException if no such method exists + */ + public static Method findAsyncServerMethod(Class<?> implClass, JavaOperation operation) throws NoSuchMethodException { + String name = operation.getJavaMethod().getName(); + List<Operation> actualOps = (List<Operation>) operation.getInterface().getAttributes().get("ASYNC-SERVER-OPERATIONS"); + Operation matchingOp = null; + for( Operation op: actualOps ) { + if( op.getName().equals(name) ) { + matchingOp = op; + break; + } + } // end for + if( matchingOp == null ) throw new NoSuchMethodException("No matching async method for operation " + operation.getName()); + + int numParams = matchingOp.getInputType().getLogical().size(); + + List<Method> matchingMethods = new ArrayList<Method>(); + for (Method m : implClass.getMethods()) { + if (m.getName().equals(name) && m.getParameterTypes().length == (numParams) ) { + matchingMethods.add(m); + } + } + + if (matchingMethods.size() == 1) { + return matchingMethods.get(0); + } + if (matchingMethods.size() > 1) { + Class<?>[] paramTypes = getPhysicalTypes(matchingOp); + return implClass.getMethod(name, paramTypes); + } + + // No matching method found + throw new NoSuchMethodException("No matching method for operation " + operation.getName() + + " is found on " + implClass); + + } // end method findAsyncServerMethod + + /** + * @Deprecated + */ + private static Class<?>[] getPhysicalTypes(Operation operation) { + DataType<List<DataType>> inputType = operation.getInputType(); + if (inputType == null) { + return new Class<?>[] {}; + } + List<DataType> types = inputType.getLogical(); + Class<?>[] javaTypes = new Class<?>[types.size()]; + for (int i = 0; i < javaTypes.length; i++) { + Type physical = types.get(i).getPhysical(); + if (physical instanceof Class<?>) { + javaTypes[i] = (Class<?>)physical; + } else { + throw new UnsupportedOperationException(); + } + } + return javaTypes; + } + + /** + * Searches a collection of operations for a match against the given method + * + * @param method the method to match + * @param operations the operations to match against + * @return a matching operation or null + * @Deprecated + */ + public static Operation findOperation(Method method, Collection<Operation> operations) { + for (Operation operation : operations) { + if (match(operation, method)) { + return operation; + } + } + return null; + } + + /** + * Determines if the given operation matches the given method + * + * @return true if the operation matches, false if does not + */ + private static boolean match(Operation operation, Method method) { + Class<?>[] params = method.getParameterTypes(); + DataType<List<DataType>> inputType = operation.getInputType(); + List<DataType> types = inputType.getLogical(); + boolean found = true; + if (types.size() == params.length && method.getName().equals(operation.getName())) { + for (int i = 0; i < params.length; i++) { + Class<?> clazz = params[i]; + if (!clazz.equals(operation.getInputType().getLogical().get(i).getPhysical())) { + found = false; + } + } + } else { + found = false; + } + return found; + + } + + private static String getPackageName(Class<?> cls) { + String name = cls.getName(); + int index = name.lastIndexOf('.'); + return index == -1 ? "" : name.substring(0, index); + } + + public static String getNamespace(Class<?> cls) { + String packageName = getPackageName(cls); + if ("".equals(packageName)) { + return ""; + } + StringBuffer ns = new StringBuffer("http://"); + String[] names = packageName.split("\\."); + for (int i = names.length - 1; i >= 0; i--) { + ns.append(names[i]); + if (i != 0) { + ns.append('.'); + } + } + ns.append('/'); + return ns.toString(); + } + +} |