001    /**
002     * Copyright (C) 2011 rwoo@gmx.de
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     *         http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    package com.googlecode.catchexception.throwable.internal;
017    
018    import java.util.HashSet;
019    import java.util.Set;
020    
021    import io.codearte.catchexception.shade.mockito.cglib.proxy.Enhancer;
022    import io.codearte.catchexception.shade.mockito.cglib.proxy.MethodInterceptor;
023    
024    /**
025     * This {@link ProxyFactory} create proxies that implements all interfaces of
026     * the underlying object including the marker interface
027     * {@link InterfaceOnlyProxy}. But in contrast to the proxies created by
028     * {@link SubclassProxyFactory} such a proxy does not subclass the class of the
029     * underlying object.
030     * 
031     * @author rwoo
032     */
033    public class InterfaceOnlyProxyFactory implements ProxyFactory {
034    
035        /*
036         * (non-Javadoc)
037         * 
038         * @see
039         * com.googlecode.catchthrowable.internal.ProxyFactory#createProxy(java.
040         * lang.Class, org.mockito.cglib.proxy.MethodInterceptor)
041         */
042        @SuppressWarnings("unchecked")
043        public <T> T createProxy(Class<?> targetClass, MethodInterceptor interceptor) {
044    
045            // get all the interfaces (is there an easier way?)
046            Set<Class<?>> interfaces = new HashSet<Class<?>>();
047            Class<?> clazz = targetClass;
048            while (true) {
049                for (Class<?> interfaze : clazz.getInterfaces()) {
050                    interfaces.add(interfaze);
051                }
052                if (clazz.getSuperclass() == null) {
053                    break;
054                }
055                clazz = clazz.getSuperclass();
056            }
057            interfaces.add(InterfaceOnlyProxy.class);
058    
059            return (T) Enhancer.create(Object.class,
060                interfaces.toArray(new Class<?>[interfaces.size()]),
061                interceptor);
062        }
063    }