    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.genericsresolverguava.internal;
    014
    015import java.lang.reflect.Field;
    016import java.lang.reflect.Method;
    017import java.lang.reflect.Type;
    018
    019import org.apache.tapestry5.commons.services.GenericsResolver;
    020import org.apache.tapestry5.genericsresolverguava.internal.GuavaGenericsResolver;
    021
    022import com.google.common.reflect.TypeToken;
    023
    024/**
    025 * {@link GuavaGenericsResolver} implementation using Guava.
    026 */
    027public class GuavaGenericsResolver implements GenericsResolver {
    028
    029    @Override
    030    public Class<?> extractGenericReturnType(Class<?> containingClass, Method method)
    031    {
    032        return TypeToken.of(containingClass).resolveType(method.getGenericReturnType()).getRawType();
    033    }
    034
    035    @Override
    036    public Class extractGenericFieldType(Class containingClass, Field field)
    037    {
    038        return TypeToken.of(containingClass).resolveType(field.getGenericType()).getRawType();
    039    }
    040
    041    @Override
    042    public Type extractActualType(Type containingType, Method method)
    043    {
    044        return TypeToken.of(containingType).resolveType(method.getGenericReturnType()).getType();
    045    }
    046
    047    @Override
    048    public Type extractActualType(Type containingType, Field field)
    049    {
    050        return TypeToken.of(containingType).resolveType(field.getGenericType()).getType();
    051    }
    052
    053    @Override
    054    public Type resolve(Type type, Type containingType)
    055    {
    056        return TypeToken.of(containingType).resolveType(type).getType();
    057    }
    058
    059    @Override
    060    public Class asClass(Type actualType) {
    061        return TypeToken.of(actualType).getRawType();
    062    }
    063
    064}