1 files changed, 157 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/binding-ejb-runtime/src/main/java/org/apache/tuscany/sca/binding/ejb/util/JavaReflectionAdapter.java b/sca-java-2.x/tags/2.0.1-RC1/modules/binding-ejb-runtime/src/main/java/org/apache/tuscany/sca/binding/ejb/util/JavaReflectionAdapter.java
new file mode 100644
index 0000000000..651c967aad
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/binding-ejb-runtime/src/main/java/org/apache/tuscany/sca/binding/ejb/util/JavaReflectionAdapter.java
@@ -0,0 +1,157 @@
+/*
+ * 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.binding.ejb.util;
+
+import java.beans.PropertyDescriptor;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.WeakHashMap;
+
+import org.oasisopen.sca.ServiceRuntimeException;
+
+/**
+ * An adapter for java classes, indexes the methods by name and provides an
+ * invoke method that takes a method name.
+ *
+ * @version $Rev$ $Date$
+ */
+final class JavaReflectionAdapter {
+
+    private static Map<Class, JavaReflectionAdapter> adapters =
+        Collections.synchronizedMap(new WeakHashMap<Class, JavaReflectionAdapter>());
+
+    private static final Map<Class, Object> DEFAULT_VALUES = new HashMap<Class, Object>();
+    static {
+        DEFAULT_VALUES.put(boolean.class, Boolean.FALSE);
+        DEFAULT_VALUES.put(byte.class, new Byte((byte)0));
+        DEFAULT_VALUES.put(char.class, new Character((char)0));
+        DEFAULT_VALUES.put(short.class, new Short((short)0));
+        DEFAULT_VALUES.put(int.class, Integer.valueOf(0));
+        DEFAULT_VALUES.put(long.class, new Long(0));
+        DEFAULT_VALUES.put(float.class, new Float(0.0));
+        DEFAULT_VALUES.put(double.class, new Double(0.0));
+    }
+
+    private Map<String, Method> methodMap = new HashMap<String, Method>();
+
+    /**
+     * Constructor
+     * 
+     * @param clazz
+     */
+    private JavaReflectionAdapter(final Class clazz) {
+        // Index the methods on the implementation class
+        // FIXME J2 Security - promote this to callers of this method
+        Method[] methods = AccessController.doPrivileged(new PrivilegedAction<Method[]>() {
+            public Method[] run() {
+                return clazz.getMethods();
+            }
+        });
+        for (int i = 0; i < methods.length; i++) {
+            methodMap.put(methods[i].getName(), methods[i]);
+        }
+    }
+
+    /**
+     * Create a java reflection adapter
+     * 
+     * @param clazz
+     */
+    static synchronized JavaReflectionAdapter createJavaReflectionAdapter(Class clazz) {
+        JavaReflectionAdapter adapter = (JavaReflectionAdapter)adapters.get(clazz);
+        if (adapter == null) {
+            adapter = new JavaReflectionAdapter(clazz);
+            adapters.put(clazz, adapter);
+        }
+        return adapter;
+    }
+
+    /**
+     * Return the specified method
+     * 
+     * @param methodName
+     * @return
+     * @throws NoSuchMethodException
+     */
+    Method getMethod(String methodName) throws NoSuchMethodException {
+
+        Method method = (Method)methodMap.get(methodName);
+        if (method == null) {
+            throw new NoSuchMethodException(methodName);
+        }
+        return method;
+    }
+
+    /**
+     * Returns a map containing the methods on the class, keyed by name
+     * 
+     * @return
+     */
+    Map getMethods() {
+        return methodMap;
+    }
+
+    /**
+     * Invoke a method using Java reflection.
+     * 
+     * @param method
+     * @param object
+     * @param args
+     * @return
+     * @throws InvocationTargetException
+     * @throws IllegalAccessException
+     */
+    Object invoke(Method method, Object object, Object[] args) throws InvocationTargetException,
+        IllegalAccessException {
+        Class[] parameterTypes = method.getParameterTypes();
+        for (int i = 0; i < parameterTypes.length; i++) {
+            Class parameterType = parameterTypes[i];
+            if (args[i] == null && parameterType.isPrimitive()) {
+                args[i] = DEFAULT_VALUES.get(parameterType);
+            }
+        }
+        return method.invoke(object, args);
+    }
+
+    /**
+     * Set the java bean property
+     * 
+     * @param bean
+     * @param propertyName
+     * @param value
+     * @return
+     */
+    boolean setProperty(Object bean, String propertyName, Object value) {
+        try {
+            PropertyDescriptor propertyDescriptor = new PropertyDescriptor(propertyName, bean.getClass());
+            Method writeMethod = propertyDescriptor.getWriteMethod();
+            writeMethod.invoke(bean, new Object[] {value});
+            return true;
+        } catch (InvocationTargetException e) {
+            throw new ServiceRuntimeException(e.getTargetException());
+        } catch (Exception e) {
+            return false;
+        }
+    }
+}