    001// Licensed under the Apache License, Version 2.0 (the "License");
    002// you may not use this file except in compliance with the License.
    003// You may obtain a copy of the License at
    004//
    005//     http://www.apache.org/licenses/LICENSE-2.0
    006//
    007// Unless required by applicable law or agreed to in writing, software
    008// distributed under the License is distributed on an "AS IS" BASIS,
    009// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    010// See the License for the specific language governing permissions and
    011// limitations under the License.
    012
    013package org.apache.tapestry5.internal.genericsresolverguava;
    014
    015import java.lang.reflect.Field;
    016import java.lang.reflect.Method;
    017import java.lang.reflect.Type;
    018
    019import org.apache.tapestry5.services.GenericsResolver;
    020
    021import com.google.common.reflect.TypeToken;
    022
    023/**
    024 * {@link GuavaGenericsResolver} implementation using Guava.
    025 */
    026public class GuavaGenericsResolver implements GenericsResolver {
    027
    028    @Override
    029    public Class<?> extractGenericReturnType(Class<?> containingClass, Method method)
    030    {
    031        return TypeToken.of(containingClass).resolveType(method.getGenericReturnType()).getRawType();
    032    }
    033
    034    @Override
    035    public Class extractGenericFieldType(Class containingClass, Field field)
    036    {
    037        return TypeToken.of(containingClass).resolveType(field.getGenericType()).getRawType();
    038    }
    039
    040    @Override
    041    public Type extractActualType(Type containingType, Method method)
    042    {
    043        return TypeToken.of(containingType).resolveType(method.getGenericReturnType()).getType();
    044    }
    045
    046    @Override
    047    public Type extractActualType(Type containingType, Field field)
    048    {
    049        return TypeToken.of(containingType).resolveType(field.getGenericType()).getType();
    050    }
    051
    052    @Override
    053    public Type resolve(Type type, Type containingType)
    054    {
    055        return TypeToken.of(containingType).resolveType(type).getType();
    056    }
    057
    058    @Override
    059    public Class asClass(Type actualType) {
    060        return TypeToken.of(actualType).getRawType();
    061    }
    062
    063}