001package org.apache.commons.digester3.annotations.handlers;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 *
012 *   http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022import java.lang.reflect.AnnotatedElement;
023import java.lang.reflect.Constructor;
024
025import org.apache.commons.digester3.annotations.AnnotationHandler;
026import org.apache.commons.digester3.annotations.rules.ObjectCreate;
027import org.apache.commons.digester3.binder.ObjectCreateBuilder;
028import org.apache.commons.digester3.binder.RulesBinder;
029
030/**
031 * {@link ObjectCreateHandler} handler.
032 *
033 * @since 3.0
034 */
035public final class ObjectCreateHandler
036    implements AnnotationHandler<ObjectCreate, AnnotatedElement>
037{
038
039    /**
040     * {@inheritDoc}
041     */
042    public void handle( ObjectCreate annotation, AnnotatedElement element, RulesBinder rulesBinder )
043    {
044        Class<?> type = null;
045        if ( element instanceof Class<?> )
046        {
047            type = (Class<?>) element;
048        }
049        else if ( element instanceof Constructor<?> )
050        {
051            type = ( (Constructor<?>) element ).getDeclaringClass();
052        }
053        else
054        {
055            rulesBinder.addError( "Misplaced @ObjectCreate annotation to %s, Class and Constructor only supported",
056                                  element );
057            return;
058        }
059
060        ObjectCreateBuilder builder = rulesBinder
061                .forPattern( annotation.pattern() )
062                .withNamespaceURI( annotation.namespaceURI() )
063                .createObject()
064                .ofType( type )
065                .ofTypeSpecifiedByAttribute( annotation.attributeName() != null ? annotation.attributeName() : null );
066
067        if ( element instanceof Constructor<?> )
068        {
069            Constructor<?> method = (Constructor<?>) element;
070            builder.usingConstructor( method.getParameterTypes() );
071        }
072    }
073
074}