net.gbmb.collector.rest.HttpRecordMessageConverter.java Source code

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Here is the source code for net.gbmb.collector.rest.HttpRecordMessageConverter.java

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/*
 * Copyright 2014 Guillaume Bailleul
 *
 * 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 net.gbmb.collector.rest;

import com.fasterxml.jackson.databind.ObjectMapper;
import net.gbmb.collector.CollectionRecord;
import org.springframework.http.HttpInputMessage;
import org.springframework.http.HttpOutputMessage;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.HttpMessageNotWritableException;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;

public class HttpRecordMessageConverter implements HttpMessageConverter<CollectionRecord> {

    private static final ObjectMapper MAPPER = new ObjectMapper();

    @Override
    public boolean canRead(Class<?> aClass, MediaType mediaType) {
        if (aClass.equals(CollectionRecord.class)) {
            return MediaType.APPLICATION_JSON.includes(mediaType);
        } else {
            return false;
        }
    }

    @Override
    public boolean canWrite(Class<?> aClass, MediaType mediaType) {
        return false;
    }

    @Override
    public List<MediaType> getSupportedMediaTypes() {
        List<MediaType> ret = new ArrayList<MediaType>(1);
        ret.add(MediaType.APPLICATION_JSON);
        return ret;
    }

    @Override
    public CollectionRecord read(Class<? extends CollectionRecord> aClass, HttpInputMessage httpInputMessage)
            throws IOException {
        CollectionRecord cr = convert(httpInputMessage.getBody());
        cr.setRecordDate(new Date());
        return cr;
    }

    @Override
    public void write(CollectionRecord collectionRecord, MediaType mediaType, HttpOutputMessage httpOutputMessage)
            throws IOException {
        throw new HttpMessageNotWritableException("Not writable");
    }

    public CollectionRecord convert(InputStream body) throws IOException {
        CollectionRecord cr = new CollectionRecord();
        Map<String, Object> content = MAPPER.readValue(body, Map.class);
        cr.setContent(content);
        return cr;
    }

}