001    /**
002     * 
003     * Copyright 2004 Protique Ltd
004     * 
005     * Licensed under the Apache License, Version 2.0 (the "License"); 
006     * you may not use this file except in compliance with the License. 
007     * You may obtain a copy of the License at 
008     * 
009     * http://www.apache.org/licenses/LICENSE-2.0
010     * 
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS, 
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
014     * See the License for the specific language governing permissions and 
015     * limitations under the License. 
016     * 
017     **/
018    package org.codehaus.activesoap.handler.xmlbeans;
019    
020    import org.apache.xmlbeans.SchemaType;
021    import org.apache.xmlbeans.XmlObject;
022    import org.codehaus.activesoap.handler.DefaultHandlerRegistry;
023    import org.codehaus.activesoap.handler.DefaultHandlerRegistry;
024    import org.codehaus.activesoap.handler.DefaultHandlerRegistry;
025    
026    import javax.xml.namespace.QName;
027    import java.lang.reflect.Field;
028    import java.lang.reflect.Method;
029    
030    /**
031     * @version $Revision: 1.6 $
032     */
033    public class XMLBeansRegistry extends DefaultHandlerRegistry {
034    
035        /**
036         * Allows simple services to be registered so that they can automatically handle
037         * requests of the correct schema type.
038         *
039         * @param instance
040         */
041        public void registerService(Object instance) throws IllegalAccessException, NoSuchFieldException {
042            if (instance == null) {
043                throw new IllegalArgumentException("instance should not be null");
044            }
045            registerService(instance.getClass(), instance);
046        }
047    
048        /**
049         * Allows simple services to be registered so that they can automatically handle
050         * requests of the correct schema type.
051         *
052         * @param serviceClass
053         */
054        public void registerService(Class serviceClass) throws IllegalAccessException, NoSuchFieldException {
055            registerService(serviceClass, null);
056        }
057    
058        protected void registerService(Class serviceClass, Object instance) throws NoSuchFieldException, IllegalAccessException {
059            Method[] methods = serviceClass.getMethods();
060            for (int i = 0, size = methods.length; i < size; i++) {
061                Method method = methods[i];
062                Class[] parameterTypes = method.getParameterTypes();
063                if (parameterTypes.length == 1) {
064                    Class parameterType = parameterTypes[0];
065                    if (XmlObject.class.isAssignableFrom(parameterType)) {
066                        registerServiceMethod(serviceClass, instance, method, parameterType);
067                    }
068                }
069            }
070        }
071    
072        protected void registerServiceMethod(Class serviceClass, Object instance, Method method, Class parameterType) throws NoSuchFieldException, IllegalAccessException {
073            // lets access to the SchemaType
074            Field field = parameterType.getField("type");
075            SchemaType type = (SchemaType) field.get(null);
076            QName name = type.getDocumentElementName();
077            addHandler(name, new XMLBeanInvokeMethodHandler(serviceClass, instance, method));
078        }
079    }