merge of RB_V1_5_0 changes back into HEAD

1 files changed, 190 insertions, 0 deletions

diff --git a/aspectj5rt/java5-src/org/aspectj/lang/Aspects.java b/aspectj5rt/java5-src/org/aspectj/lang/Aspects.java
new file mode 100644
index 000000000..e82320c2e
--- /dev/null
+++ b/aspectj5rt/java5-src/org/aspectj/lang/Aspects.java
@@ -0,0 +1,190 @@
+/*******************************************************************************
+ * Copyright (c) 2005 Contributors.
+ * All rights reserved.
+ * This program and the accompanying materials are made available
+ * under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution and is available at
+ * http://eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * initial implementation              Alexandre Vasseur
+ * generic signature update            Adrian Colyer
+ *******************************************************************************/
+package org.aspectj.lang;
+
+
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.lang.reflect.InvocationTargetException;
+
+/**
+ * Handles generic aspectOf method when those are not available in the aspects but added later on
+ * thru load time weaving.
+ * <p/>
+ * Aspects.aspectOf(..) is doing reflective calls to the aspect aspectOf, so for better performance
+ * consider using ajc compilation of the aspects and using them as a binary dependancies in your project.
+ *
+ * @author <a href="mailto:alex AT gnilux DOT com">Alexandre Vasseur</a>
+ */
+public class Aspects {
+
+    private final static Class[] EMPTY_CLASS_ARRAY = new Class[0];
+    private final static Class[] PEROBJECT_CLASS_ARRAY = new Class[]{Object.class};
+    private final static Class[] PERTYPEWITHIN_CLASS_ARRAY = new Class[]{Class.class};
+    private final static Object[] EMPTY_OBJECT_ARRAY = new Object[0];
+    private final static String ASPECTOF = "aspectOf";
+    private final static String HASASPECT = "hasAspect";
+
+    /**
+     * Returns the singleton aspect or the percflow / percflowbelow associated with the current thread
+     *
+     * @param aspectClass
+     * @return
+     * @throws NoAspectBoundException if no such aspect
+     */
+    public static <T> T aspectOf(Class<T> aspectClass) throws NoAspectBoundException {
+        try {
+            return (T) getSingletonOrThreadAspectOf(aspectClass).invoke(null, EMPTY_OBJECT_ARRAY);
+        } catch (InvocationTargetException e) {
+        	//FIXME asc Highly temporary change to see what the build makes of it - dont use 1.4 APIs
+            throw new NoAspectBoundException(aspectClass.getName(), e);//e.getCause());
+        } catch (Exception e) {
+            throw new NoAspectBoundException(aspectClass.getName(), e);
+        }
+    }
+
+    /**
+     * Returns the perthis / pertarget aspect
+     * @param aspectClass
+     * @param perObject
+     * @return
+     * @throws NoAspectBoundException if no such aspect, or no aspect bound
+     */
+    public static <T> T aspectOf(Class<T> aspectClass, Object perObject) throws NoAspectBoundException {
+        try {
+            return (T) getPerObjectAspectOf(aspectClass).invoke(null, new Object[]{perObject});
+        } catch (InvocationTargetException e) {
+        	//FIXME asc Highly temporary change to see what the build makes of it - dont use 1.4 APIs
+            throw new NoAspectBoundException(aspectClass.getName(), e);//e.getCause());
+        } catch (Exception e) {
+            throw new NoAspectBoundException(aspectClass.getName(), e);
+        }
+    }
+
+    /**
+     * Returns the pertypewithin aspect
+     * @param aspectClass
+     * @param perTypeWithin class
+     * @return
+     * @throws NoAspectBoundException if no such aspect, or no aspect bound
+     */
+    public static <T> T aspectOf(Class<T> aspectClass, Class<?> perTypeWithin) throws NoAspectBoundException {
+        try {
+            return (T) getPerTypeWithinAspectOf(aspectClass).invoke(null, new Object[]{perTypeWithin});
+        } catch (InvocationTargetException e) {
+//        	FIXME asc Highly temporary change to see what the build makes of it - dont use 1.4 APIs
+            throw new NoAspectBoundException(aspectClass.getName(), e);//e.getCause());
+        } catch (Exception e) {
+            throw new NoAspectBoundException(aspectClass.getName(), e);
+        }
+    }
+
+    /**
+     * Returns true if singleton aspect or percflow / percflowbelow aspect is bound
+     *
+     * @param aspectClass
+     * @return
+     * @throws NoAspectBoundException if not bound
+     */
+    public static boolean hasAspect(Class<?> aspectClass) throws NoAspectBoundException {
+        try {
+            return ((Boolean)getSingletonOrThreadHasAspect(aspectClass).invoke(null, EMPTY_OBJECT_ARRAY)).booleanValue();
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
+    /**
+     * Returns true if the perthis / pertarget aspect is bound
+     * @param aspectClass
+     * @param perObject
+     * @return
+     * @throws NoAspectBoundException if not bound
+     */
+    public static boolean hasAspect(Class<?> aspectClass, Object perObject) throws NoAspectBoundException {
+        try {
+            return ((Boolean)getPerObjectHasAspect(aspectClass).invoke(null, new Object[]{perObject})).booleanValue();
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
+    /**
+     * Returns true if the pertypewithin aspect is bound
+     * @param aspectClass
+     * @param perTypeWithin class
+     * @return
+     * @throws NoAspectBoundException if not bound
+     */
+    public static boolean hasAspect(Class<?> aspectClass, Class<?> perTypeWithin) throws NoAspectBoundException {
+        try {
+            return ((Boolean)getPerTypeWithinHasAspect(aspectClass).invoke(null, new Object[]{perTypeWithin})).booleanValue();
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
+    // -- aspectOf
+
+    private static Method getSingletonOrThreadAspectOf(Class<?> aspectClass) throws NoSuchMethodException {
+        Method method = aspectClass.getDeclaredMethod(ASPECTOF, EMPTY_CLASS_ARRAY);
+        return checkAspectOf(method, aspectClass);
+    }
+
+    private static Method getPerObjectAspectOf(Class<?> aspectClass) throws NoSuchMethodException {
+        Method method = aspectClass.getDeclaredMethod(ASPECTOF, PEROBJECT_CLASS_ARRAY);
+        return checkAspectOf(method, aspectClass);
+    }
+
+    private static Method getPerTypeWithinAspectOf(Class<?> aspectClass) throws NoSuchMethodException {
+        Method method = aspectClass.getDeclaredMethod(ASPECTOF, PERTYPEWITHIN_CLASS_ARRAY);
+        return checkAspectOf(method, aspectClass);
+    }
+
+    private static Method checkAspectOf(Method method, Class<?> aspectClass) throws NoSuchMethodException {
+        method.setAccessible(true);
+        if (!method.isAccessible()
+            || !Modifier.isPublic(method.getModifiers())
+            || !Modifier.isStatic(method.getModifiers())) {            
+            throw new NoSuchMethodException(aspectClass.getName() + ".aspectOf(..) is not accessible public static");
+        }
+        return method;
+    }
+
+    // -- hasAspect
+
+    private static Method getSingletonOrThreadHasAspect(Class aspectClass) throws NoSuchMethodException {
+        Method method = aspectClass.getDeclaredMethod(HASASPECT, EMPTY_CLASS_ARRAY);
+        return checkHasAspect(method, aspectClass);
+    }
+
+    private static Method getPerObjectHasAspect(Class aspectClass) throws NoSuchMethodException {
+        Method method = aspectClass.getDeclaredMethod(HASASPECT, PEROBJECT_CLASS_ARRAY);
+        return checkHasAspect(method, aspectClass);
+    }
+
+    private static Method getPerTypeWithinHasAspect(Class aspectClass) throws NoSuchMethodException {
+        Method method = aspectClass.getDeclaredMethod(HASASPECT, PERTYPEWITHIN_CLASS_ARRAY);
+        return checkHasAspect(method, aspectClass);
+    }
+
+    private static Method checkHasAspect(Method method, Class aspectClass) throws NoSuchMethodException {
+        method.setAccessible(true);
+        if (!method.isAccessible()
+            || !Modifier.isPublic(method.getModifiers())
+            || !Modifier.isStatic(method.getModifiers())) {
+            throw new NoSuchMethodException(aspectClass.getName() + ".hasAspect(..) is not accessible public static");
+        }
+        return method;
+    }
+}