| /* |
| * Copyright 2003,2004 The Apache Software Foundation |
| * |
| * Licensed 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.mockito.cglib.proxy; |
| |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.Modifier; |
| import java.util.*; |
| |
| import org.mockito.asm.ClassVisitor; |
| import org.mockito.cglib.core.*; |
| |
| |
| |
| /** |
| * <code>Mixin</code> allows |
| * multiple objects to be combined into a single larger object. The |
| * methods in the generated object simply call the original methods in the |
| * underlying "delegate" objects. |
| * @author Chris Nokleberg |
| * @version $Id: Mixin.java,v 1.7 2005/09/27 11:42:27 baliuka Exp $ |
| */ |
| abstract public class Mixin { |
| private static final MixinKey KEY_FACTORY = |
| (MixinKey)KeyFactory.create(MixinKey.class, KeyFactory.CLASS_BY_NAME); |
| private static final Map ROUTE_CACHE = Collections.synchronizedMap(new HashMap()); |
| |
| public static final int STYLE_INTERFACES = 0; |
| public static final int STYLE_BEANS = 1; |
| public static final int STYLE_EVERYTHING = 2; |
| |
| interface MixinKey { |
| public Object newInstance(int style, String[] classes, int[] route); |
| } |
| |
| abstract public Mixin newInstance(Object[] delegates); |
| |
| /** |
| * Helper method to create an interface mixin. For finer control over the |
| * generated instance, use a new instance of <code>Mixin</code> |
| * instead of this static method. |
| * TODO |
| */ |
| public static Mixin create(Object[] delegates) { |
| Generator gen = new Generator(); |
| gen.setDelegates(delegates); |
| return gen.create(); |
| } |
| |
| /** |
| * Helper method to create an interface mixin. For finer control over the |
| * generated instance, use a new instance of <code>Mixin</code> |
| * instead of this static method. |
| * TODO |
| */ |
| public static Mixin create(Class[] interfaces, Object[] delegates) { |
| Generator gen = new Generator(); |
| gen.setClasses(interfaces); |
| gen.setDelegates(delegates); |
| return gen.create(); |
| } |
| |
| |
| public static Mixin createBean(Object[] beans) { |
| |
| return createBean(null, beans); |
| |
| } |
| /** |
| * Helper method to create a bean mixin. For finer control over the |
| * generated instance, use a new instance of <code>Mixin</code> |
| * instead of this static method. |
| * TODO |
| */ |
| public static Mixin createBean(ClassLoader loader,Object[] beans) { |
| Generator gen = new Generator(); |
| gen.setStyle(STYLE_BEANS); |
| gen.setDelegates(beans); |
| gen.setClassLoader(loader); |
| return gen.create(); |
| } |
| |
| public static class Generator extends AbstractClassGenerator { |
| private static final Source SOURCE = new Source(Mixin.class.getName()); |
| |
| private Class[] classes; |
| private Object[] delegates; |
| private int style = STYLE_INTERFACES; |
| |
| private int[] route; |
| |
| public Generator() { |
| super(SOURCE); |
| } |
| |
| protected ClassLoader getDefaultClassLoader() { |
| return classes[0].getClassLoader(); // is this right? |
| } |
| |
| public void setStyle(int style) { |
| switch (style) { |
| case STYLE_INTERFACES: |
| case STYLE_BEANS: |
| case STYLE_EVERYTHING: |
| this.style = style; |
| break; |
| default: |
| throw new IllegalArgumentException("Unknown mixin style: " + style); |
| } |
| } |
| |
| public void setClasses(Class[] classes) { |
| this.classes = classes; |
| } |
| |
| public void setDelegates(Object[] delegates) { |
| this.delegates = delegates; |
| } |
| |
| public Mixin create() { |
| if (classes == null && delegates == null) { |
| throw new IllegalStateException("Either classes or delegates must be set"); |
| } |
| switch (style) { |
| case STYLE_INTERFACES: |
| if (classes == null) { |
| Route r = route(delegates); |
| classes = r.classes; |
| route = r.route; |
| } |
| break; |
| case STYLE_BEANS: |
| // fall-through |
| case STYLE_EVERYTHING: |
| if (classes == null) { |
| classes = ReflectUtils.getClasses(delegates); |
| } else { |
| if (delegates != null) { |
| Class[] temp = ReflectUtils.getClasses(delegates); |
| if (classes.length != temp.length) { |
| throw new IllegalStateException("Specified classes are incompatible with delegates"); |
| } |
| for (int i = 0; i < classes.length; i++) { |
| if (!classes[i].isAssignableFrom(temp[i])) { |
| throw new IllegalStateException("Specified class " + classes[i] + " is incompatible with delegate class " + temp[i] + " (index " + i + ")"); |
| } |
| } |
| } |
| } |
| } |
| setNamePrefix(classes[ReflectUtils.findPackageProtected(classes)].getName()); |
| |
| return (Mixin)super.create(KEY_FACTORY.newInstance(style, ReflectUtils.getNames( classes ), route)); |
| } |
| |
| public void generateClass(ClassVisitor v) { |
| switch (style) { |
| case STYLE_INTERFACES: |
| new MixinEmitter(v, getClassName(), classes, route); |
| break; |
| case STYLE_BEANS: |
| new MixinBeanEmitter(v, getClassName(), classes); |
| break; |
| case STYLE_EVERYTHING: |
| new MixinEverythingEmitter(v, getClassName(), classes); |
| break; |
| } |
| } |
| |
| protected Object firstInstance(Class type) { |
| return ((Mixin)ReflectUtils.newInstance(type)).newInstance(delegates); |
| } |
| |
| protected Object nextInstance(Object instance) { |
| return ((Mixin)instance).newInstance(delegates); |
| } |
| } |
| |
| public static Class[] getClasses(Object[] delegates) { |
| return (Class[])route(delegates).classes.clone(); |
| } |
| |
| // public static int[] getRoute(Object[] delegates) { |
| // return (int[])route(delegates).route.clone(); |
| // } |
| |
| private static Route route(Object[] delegates) { |
| Object key = ClassesKey.create(delegates); |
| Route route = (Route)ROUTE_CACHE.get(key); |
| if (route == null) { |
| ROUTE_CACHE.put(key, route = new Route(delegates)); |
| } |
| return route; |
| } |
| |
| private static class Route |
| { |
| private Class[] classes; |
| private int[] route; |
| |
| Route(Object[] delegates) { |
| Map map = new HashMap(); |
| ArrayList collect = new ArrayList(); |
| for (int i = 0; i < delegates.length; i++) { |
| Class delegate = delegates[i].getClass(); |
| collect.clear(); |
| ReflectUtils.addAllInterfaces(delegate, collect); |
| for (Iterator it = collect.iterator(); it.hasNext();) { |
| Class iface = (Class)it.next(); |
| if (!map.containsKey(iface)) { |
| map.put(iface, new Integer(i)); |
| } |
| } |
| } |
| classes = new Class[map.size()]; |
| route = new int[map.size()]; |
| int index = 0; |
| for (Iterator it = map.keySet().iterator(); it.hasNext();) { |
| Class key = (Class)it.next(); |
| classes[index] = key; |
| route[index] = ((Integer)map.get(key)).intValue(); |
| index++; |
| } |
| } |
| } |
| } |