001    //Copyright 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package net.sf.tacos.annotations;
016    
017    import java.lang.reflect.Method;
018    
019    import org.apache.hivemind.Location;
020    import org.apache.tapestry.annotations.AnnotationUtils;
021    import org.apache.tapestry.annotations.MethodAnnotationEnhancementWorker;
022    import org.apache.tapestry.enhance.EnhancementOperation;
023    import org.apache.tapestry.spec.IComponentSpecification;
024    import org.apache.tapestry.spec.InjectSpecification;
025    import org.apache.tapestry.spec.InjectSpecificationImpl;
026    
027    /**
028     * 
029     * @author Patrick Moore
030     */
031    public class InjectParameterFlagAnnotationWorker implements MethodAnnotationEnhancementWorker
032    {
033        private static final String BOUND = "Bound";
034    
035        public void performEnhancement(EnhancementOperation op, IComponentSpecification spec,
036                Method method, Location location)
037        {
038            String propertyName = AnnotationUtils.getPropertyName(method);
039            InjectParameterFlag ipv = method.getAnnotation(InjectParameterFlag.class);
040            
041            String watchedParameterName = ipv.value();
042    
043            if (watchedParameterName.equals(""))
044            {
045                watchedParameterName = propertyName;
046                if (watchedParameterName.endsWith(BOUND)) // strip it
047                {
048                    int length = watchedParameterName.length();
049                    watchedParameterName = watchedParameterName.substring(0, length - BOUND.length());
050                }
051            }
052    
053            InjectSpecification inject = new InjectSpecificationImpl();
054    
055            inject.setType("parameter-flag");
056            inject.setProperty(propertyName);
057            inject.setObject(watchedParameterName);
058            inject.setLocation(location);
059    
060            spec.addInjectSpecification(inject);
061        }
062    
063    }
064