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From we...@apache.org
Subject svn commit: r809927 - in /myfaces/extensions/scripting/trunk/core/src/main/java/org/apache/myfaces/scripting/core/util: Cast.java ClassUtils.java Null.java
Date Tue, 01 Sep 2009 09:30:24 GMT
Author: werpu
Date: Tue Sep  1 09:30:24 2009
New Revision: 809927

URL: http://svn.apache.org/viewvc?rev=809927&view=rev
Log:
https://issues.apache.org/jira/browse/EXTSCRIPT-3
moving over the example introspection code to add
the dynamic helpers for the java layer




Added:
    myfaces/extensions/scripting/trunk/core/src/main/java/org/apache/myfaces/scripting/core/util/Cast.java
    myfaces/extensions/scripting/trunk/core/src/main/java/org/apache/myfaces/scripting/core/util/Null.java
Modified:
    myfaces/extensions/scripting/trunk/core/src/main/java/org/apache/myfaces/scripting/core/util/ClassUtils.java

Added: myfaces/extensions/scripting/trunk/core/src/main/java/org/apache/myfaces/scripting/core/util/Cast.java
URL: http://svn.apache.org/viewvc/myfaces/extensions/scripting/trunk/core/src/main/java/org/apache/myfaces/scripting/core/util/Cast.java?rev=809927&view=auto
==============================================================================
--- myfaces/extensions/scripting/trunk/core/src/main/java/org/apache/myfaces/scripting/core/util/Cast.java
(added)
+++ myfaces/extensions/scripting/trunk/core/src/main/java/org/apache/myfaces/scripting/core/util/Cast.java
Tue Sep  1 09:30:24 2009
@@ -0,0 +1,42 @@
+/*
+ * 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.myfaces.scripting.core.util;
+
+/**
+ * Simple casting representation for introspection
+ * calls
+ */
+public class Cast {
+
+    Class clazz;
+    Object value;
+
+    public Cast(Class clazz, Object value) {
+        this.clazz = clazz;
+        this.value = value;
+    }
+
+    public Class getClazz() {
+        return clazz;
+    }
+
+    public Object getValue() {
+        return value;
+    }
+}

Modified: myfaces/extensions/scripting/trunk/core/src/main/java/org/apache/myfaces/scripting/core/util/ClassUtils.java
URL: http://svn.apache.org/viewvc/myfaces/extensions/scripting/trunk/core/src/main/java/org/apache/myfaces/scripting/core/util/ClassUtils.java?rev=809927&r1=809926&r2=809927&view=diff
==============================================================================
--- myfaces/extensions/scripting/trunk/core/src/main/java/org/apache/myfaces/scripting/core/util/ClassUtils.java
(original)
+++ myfaces/extensions/scripting/trunk/core/src/main/java/org/apache/myfaces/scripting/core/util/ClassUtils.java
Tue Sep  1 09:30:24 2009
@@ -18,10 +18,12 @@
  */
 package org.apache.myfaces.scripting.core.util;
 
+import java.lang.reflect.Method;
+import java.lang.reflect.InvocationTargetException;
+
 /**
  * @author werpu
- * helper class to bypass a groovy related bug
- * 
+ *         helper class to bypass a groovy related bug
  */
 public class ClassUtils {
 
@@ -33,4 +35,99 @@
     public static Object newObject(Class clazz) throws IllegalAccessException, InstantiationException
{
         return clazz.newInstance();
     }
+
+    /**
+     * executes a method
+     *
+     * @param obj        the target object
+     * @param methodName the method name
+     * @param varargs    a list of objects casts or nulls defining the parameter classes
and its values
+     *                   if something occurs on introspection level an unmanaged exception
is throw, just like
+     *                   it would happen in a scripting class
+     */
+    public static void executeMethod(Object obj, String methodName, Object... varargs) {
+
+        Class[] classes = new Class[varargs.length];
+        for (int cnt = 0; cnt < varargs.length; cnt++) {
+
+            if (varargs[cnt] instanceof Cast) {
+                classes[cnt] = ((Cast) varargs[cnt]).getClazz();
+                varargs[cnt] = ((Cast) varargs[cnt]).getValue();
+            } else {
+                classes[cnt] = varargs[cnt].getClass();
+            }
+        }
+
+        try {
+            Method m = obj.getClass().getMethod(methodName, classes);
+            m.invoke(obj, varargs);
+        } catch (NoSuchMethodException e) {
+            throw new RuntimeException(e);
+        } catch (InvocationTargetException e) {
+            throw new RuntimeException(e);
+        } catch (IllegalAccessException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    /**
+     * executes a function on a target object
+     *
+     * @param obj        the target object
+     * @param methodName the method name
+     * @param varargs    a list of objects casts or nulls defining the parameter classes
and its values
+     *                   if something occurs on introspection level an unmanaged exception
is throw, just like
+     *                   it would happen in a scripting class
+     * @return the result object for the function(method) call
+     * @throws RuntimeException an unmanaged runtime exception in case of an introspection
error
+     */
+    public static Object executeFunction(Object obj, String methodName, Object... varargs)
{
+        Class[] classes = new Class[varargs.length];
+        for (int cnt = 0; cnt < varargs.length; cnt++) {
+
+            if (varargs[cnt] instanceof Cast) {
+                classes[cnt] = ((Cast) varargs[cnt]).getClazz();
+                varargs[cnt] = ((Cast) varargs[cnt]).getValue();
+            } else {
+                classes[cnt] = varargs[cnt].getClass();
+            }
+        }
+
+        try {
+            Method m = obj.getClass().getMethod(methodName, classes);
+            return m.invoke(obj, varargs);
+        } catch (NoSuchMethodException e) {
+            throw new RuntimeException(e);
+        } catch (InvocationTargetException e) {
+            throw new RuntimeException(e);
+        } catch (IllegalAccessException e) {
+            throw new RuntimeException(e);
+        }
+
+    }
+
+
+    /**
+     * convenience method which makes the code a little bit more readable
+     * use it in conjunction with static imports
+     *
+     * @param clazz the cast target for the method call
+     * @param value the value object to be used as param
+     * @return a Cast object of the parameters
+     */
+    public static Cast cast(Class clazz, Object value) {
+        return new Cast(clazz, value);
+    }
+
+    /**
+     * convenience method which makes the code a little bit more readable
+     * use it in conjunction with static imports
+     *
+     * @param clazz the cast target for the method call
+     * @return a null value Cast object of the parameters
+     */
+    public static Null nullCast(Class clazz) {
+        return new Null(clazz);
+    }
+
 }

Added: myfaces/extensions/scripting/trunk/core/src/main/java/org/apache/myfaces/scripting/core/util/Null.java
URL: http://svn.apache.org/viewvc/myfaces/extensions/scripting/trunk/core/src/main/java/org/apache/myfaces/scripting/core/util/Null.java?rev=809927&view=auto
==============================================================================
--- myfaces/extensions/scripting/trunk/core/src/main/java/org/apache/myfaces/scripting/core/util/Null.java
(added)
+++ myfaces/extensions/scripting/trunk/core/src/main/java/org/apache/myfaces/scripting/core/util/Null.java
Tue Sep  1 09:30:24 2009
@@ -0,0 +1,31 @@
+/*
+ * 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.myfaces.scripting.core.util;
+
+/**
+ * @Author Werner Punz
+ * Null representation for easier introspection calls
+ */
+public class Null extends Cast {
+
+    public Null(Class clazz) {
+        super(clazz, null);
+    }
+
+}



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