ratpack.jackson.internal.JsonParser.java Source code

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Here is the source code for ratpack.jackson.internal.JsonParser.java

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/*
 * Copyright 2013 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 ratpack.jackson.internal;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import ratpack.handling.Context;
import ratpack.http.TypedData;
import ratpack.jackson.JsonParseOpts;
import ratpack.parse.Parse;
import ratpack.parse.ParserSupport;

import javax.inject.Inject;
import java.io.IOException;
import java.io.InputStream;

import static ratpack.util.ExceptionUtils.uncheck;

public class JsonParser extends ParserSupport<JsonParseOpts> {

    private final ObjectMapper objectMapper;

    @Inject
    public JsonParser(ObjectMapper objectMapper) {
        super("application/json");
        this.objectMapper = objectMapper;
    }

    @Override
    public <T> T parse(Context context, TypedData body, Parse<T, JsonParseOpts> parse) {
        JsonParseOpts opts = parse.getOpts();
        Class<T> type = parse.getType();

        ObjectMapper objectMapper = getObjectMapper(opts);
        try {
            InputStream inputStream = body.getInputStream();
            if (type.equals(JsonNode.class)) {
                return type.cast(objectMapper.readTree(inputStream));
            } else {
                return objectMapper.readValue(inputStream, type);
            }
        } catch (IOException e) {
            throw uncheck(e);
        }
    }

    private ObjectMapper getObjectMapper(JsonParseOpts opts) {
        return opts.getObjectMapper() == null ? objectMapper : opts.getObjectMapper();
    }

}