1 files changed, 296 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/interface-java/src/main/java/org/apache/tuscany/sca/interfacedef/java/impl/JavaInterfaceUtil.java b/sca-java-2.x/tags/2.0.1-RC1/modules/interface-java/src/main/java/org/apache/tuscany/sca/interfacedef/java/impl/JavaInterfaceUtil.java
new file mode 100644
index 0000000000..9e85cf0e61
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/interface-java/src/main/java/org/apache/tuscany/sca/interfacedef/java/impl/JavaInterfaceUtil.java
@@ -0,0 +1,296 @@
+/*
+ * 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.ParameterizedType;
+import java.lang.reflect.Type;
+import java.lang.reflect.TypeVariable;
+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.ParameterMode;
+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();
+        
+        // Account for OUT-only in matching. (Should we cache this number in JavaOperation?) 
+        List<ParameterMode> parmModes = operation.getParameterModes();
+        int numOutOnlyHolders = 0;
+        for (ParameterMode mode : parmModes) {
+            if (mode.equals(ParameterMode.OUT)) {
+                numOutOnlyHolders++;
+            }
+        }
+        numParams += numOutOnlyHolders;
+        
+        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);
+                } else if (m.getName().equals(name + "Async") && m.getParameterTypes().length == numParams + 1) {
+                    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 {
+        
+        if (operation.getJavaMethod() != null) {
+            return operation.getJavaMethod();
+        }
+        
+        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
+     */
+    //TODO - account for Holder(s)
+    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++) {
+            DataType<?> type = types.get(i);
+            javaTypes[i] = getClassOfDataType(type);
+        }
+        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
+     */
+    //TODO - account for Holder(s)    
+    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();
+    }
+
+    /**
+     * Get the Java Type that represent the DataType informed
+     * When dataType.getGenericType() is GenericArrayType or WildcardType the Physical type is used, 
+     * because the physical type have the correct information about this DataType.
+     * @param dataType DataType
+     * @return The Class<?> that represent the DataType
+     */
+    private static Class<?> getClassOfDataType(DataType<?> dataType){
+        Type generic = dataType.getGenericType();
+        boolean isGeneric = (generic != null 
+                        && generic != dataType.getPhysical()
+                        && (generic instanceof TypeVariable<?>
+                                || generic instanceof ParameterizedType));
+        Class<?> javaType = null;
+        if (isGeneric) {
+            javaType = getClassOfSimpleGeneric(generic);
+        }else {
+            Type physical = dataType.getPhysical();
+            javaType = getClassOfPhysical(physical);
+        }
+        if (javaType == null) {
+            throw new UnsupportedOperationException();
+        }
+        return javaType;
+    }
+    
+    /**
+     * Return Class<?> of Type Generic informed
+     * @param generic The Generic Type 
+     * @return  The Class<?> that represent the Generic
+     */
+    private static Class<?> getClassOfSimpleGeneric(Type generic){
+        Class<?> javaType = null;
+        if (generic instanceof TypeVariable<?>){
+            javaType = (Class<?>)Object.class;
+        } else if (generic instanceof ParameterizedType){
+            javaType = (Class<?>)((ParameterizedType)generic).getRawType();
+        }
+        return javaType;
+    }
+
+    /**
+     * Return Class<?> of Type Physical informed
+     * @param physical The Physical 
+     * @return  The Class<?> that represent the Physical
+     */
+    private static Class<?> getClassOfPhysical(Type physical){
+        Class<?> javaType = null; 
+        if (physical instanceof Class<?>) {
+            javaType = (Class<?>)physical;
+        }
+        return javaType;
+    }     
+
+}