001    package 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    
022    import java.lang.reflect.Method;
023    
024    import org.apache.commons.digester3.annotations.AnnotationHandler;
025    import org.apache.commons.digester3.annotations.rules.SetTop;
026    import org.apache.commons.digester3.binder.RulesBinder;
027    
028    /**
029     * {@link SetTop} handler.
030     *
031     * @since 3.0
032     */
033    public final class SetTopHandler
034        implements AnnotationHandler<SetTop, Method>
035    {
036    
037        /**
038         * {@inheritDoc}
039         */
040        public void handle( SetTop annotation, Method element, RulesBinder rulesBinder )
041        {
042            if ( element.getParameterTypes().length != 1 )
043            {
044                rulesBinder.addError( "Methods annotated with digester annotation rule @%s must have just one argument",
045                                      SetTop.class.getName() );
046                return;
047            }
048    
049            rulesBinder
050                .forPattern( annotation.pattern() )
051                .withNamespaceURI( annotation.namespaceURI().length() > 0 ? annotation.namespaceURI() : null )
052                .setTop( element.getName() )
053                .withParameterType( element.getParameterTypes()[0] )
054                .fireOnBegin( annotation.fireOnBegin() );
055        }
056    
057    }