capital.scalable.restdocs.payload.JacksonResponseFieldSnippet Maven / Gradle / Ivy

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/*
 * Copyright 2016 the original author or authors.
 *
 * 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 capital.scalable.restdocs.payload;

import java.lang.reflect.GenericArrayType;
import java.lang.reflect.Type;
import java.util.List;
import java.util.Map;

import org.springframework.data.domain.Page;
import org.springframework.http.ResponseEntity;
import org.springframework.web.method.HandlerMethod;

public class JacksonResponseFieldSnippet extends AbstractJacksonFieldSnippet {

    public JacksonResponseFieldSnippet() {
        super("response");
    }

    @Override
    protected Type getType(final HandlerMethod method) {
        Class returnType = method.getReturnType().getParameterType();
        if (returnType == ResponseEntity.class) {
            return firstGenericType(method.getReturnType());
        } else if (returnType == Page.class) {
            return firstGenericType(method.getReturnType());
        } else if (returnType == List.class) {
            return new GenericArrayType() {

                @Override
                public Type getGenericComponentType() {
                    return firstGenericType(method.getReturnType());
                }
            };
        } else {
            return returnType;
        }
    }

    @Override
    protected void enrichModel(Map model, HandlerMethod handlerMethod) {
        model.put("isPagedResponse", handlerMethod != null && isPageResponse(handlerMethod));
    }

    private boolean isPageResponse(HandlerMethod handlerMethod) {
        return handlerMethod.getReturnType().getParameterType() == Page.class;
    }
}