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 015package org.apache.tapestry.annotations; 016 017import java.lang.reflect.Method; 018 019import org.apache.hivemind.HiveMind; 020import org.apache.hivemind.Location; 021import org.apache.tapestry.enhance.EnhancementOperation; 022import org.apache.tapestry.spec.IComponentSpecification; 023import org.apache.tapestry.spec.IParameterSpecification; 024import org.apache.tapestry.spec.ParameterSpecification; 025 026/** 027 * Generates a {@link org.apache.tapestry.spec.IParameterSpecification} from a 028 * {@link org.apache.tapestry.annotations.Parameter} annotation and adds it to the 029 * {@link org.apache.tapestry.spec.IComponentSpecification}. 030 * 031 * @author Howard M. Lewis Ship 032 * @since 4.0 033 */ 034public class ParameterAnnotationWorker implements MethodAnnotationEnhancementWorker 035{ 036 037 public void performEnhancement(EnhancementOperation op, IComponentSpecification spec, 038 Method method, Location location) 039 { 040 Parameter parameter = method.getAnnotation(Parameter.class); 041 042 String propertyName = AnnotationUtils.getPropertyName(method); 043 044 boolean deprecated = method.isAnnotationPresent(Deprecated.class); 045 046 IParameterSpecification ps = new ParameterSpecification(); 047 048 String parameterName = parameter.name(); 049 050 if (HiveMind.isBlank(parameterName)) 051 parameterName = propertyName; 052 053 Class propertyType = op.getPropertyType(propertyName); 054 055 ps.setAliases(parameter.aliases()); 056 ps.setCache(parameter.cache()); 057 058 if (HiveMind.isNonBlank(parameter.defaultValue())) 059 ps.setDefaultValue(parameter.defaultValue()); 060 061 ps.setDeprecated(deprecated); 062 ps.setParameterName(parameterName); 063 ps.setPropertyName(propertyName); 064 ps.setRequired(parameter.required()); 065 ps.setType(propertyType.getName()); 066 ps.setLocation(location); 067 068 spec.addParameter(ps); 069 } 070}