| /* |
| * Copyright (c) 2008, Rickard Öberg. All Rights Reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| package org.apache.zest.runtime.composite; |
| |
| import java.lang.annotation.Annotation; |
| import java.lang.reflect.ParameterizedType; |
| import java.lang.reflect.Type; |
| import org.apache.zest.api.constraint.Constraint; |
| import org.apache.zest.api.util.Classes; |
| |
| /** |
| * JAVADOC |
| */ |
| public final class ConstraintDeclaration |
| { |
| private final Class<? extends Constraint<?, ?>> constraintClass; |
| @SuppressWarnings( "raw" ) |
| private final Class constraintAnnotationType; |
| private final Type constraintValueType; |
| |
| @SuppressWarnings( "unchecked" ) |
| public ConstraintDeclaration( Class<? extends Constraint<?, ?>> constraintClass ) |
| { |
| this.constraintClass = constraintClass; |
| |
| constraintAnnotationType = (Class<? extends Annotation>) ( (ParameterizedType) constraintClass.getGenericInterfaces()[ 0 ] ) |
| .getActualTypeArguments()[ 0 ]; |
| constraintValueType = ( (ParameterizedType) constraintClass.getGenericInterfaces()[ 0 ] ).getActualTypeArguments()[ 1 ]; |
| } |
| |
| public Class<? extends Constraint<?, ?>> constraintClass() |
| { |
| return constraintClass; |
| } |
| |
| @SuppressWarnings( {"raw", "unchecked"} ) |
| public boolean appliesTo( Class annotationType, Type valueType ) |
| { |
| if( constraintValueType instanceof Class ) |
| { |
| Class constraintValueClass = (Class) constraintValueType; |
| Class valueClass = Classes.RAW_CLASS.map( valueType ); |
| return constraintAnnotationType.equals( annotationType ) && constraintValueClass.isAssignableFrom( valueClass ); |
| } |
| else if( constraintValueType instanceof ParameterizedType ) |
| { |
| // TODO Handle nested generics |
| Class constraintValueClass = Classes.RAW_CLASS.map( constraintValueType ); |
| Class valueClass = Classes.RAW_CLASS.map( valueType ); |
| return constraintAnnotationType.equals( annotationType ) && constraintValueClass.isAssignableFrom( valueClass ); |
| } |
| else |
| { |
| return false; // TODO Handles more cases. What are they? |
| } |
| } |
| } |