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    • de.taimos.dvalin.jaxrs.providers.JacksonProvider Maven / Gradle / Ivy

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    package de.taimos.dvalin.jaxrs.providers;

/*
 * #%L
 * Daemon with Spring and CXF
 * %%
 * Copyright (C) 2013 - 2015 Taimos GmbH
 * %%
 * 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.
 * #L%
 */

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;

import javax.annotation.Priority;
import javax.ws.rs.Consumes;
import javax.ws.rs.Priorities;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.ws.rs.ext.Provider;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.type.TypeFactory;

import de.taimos.dvalin.jaxrs.MapperFactory;

@Provider
@Priority(Priorities.ENTITY_CODER)
@Consumes(MediaType.WILDCARD)
@Produces(MediaType.WILDCARD)
public class JacksonProvider implements MessageBodyReader, MessageBodyWriter {

    private ObjectMapper mapper = MapperFactory.createDefault();


    @Override
    public boolean isWriteable(Class type, Type genericType, Annotation[] annotations, MediaType mediaType) {
        return mediaType.getSubtype().equals("json") || mediaType.getSubtype().endsWith("+json");
    }

    @Override
    public long getSize(Object t, Class type, Type genericType, Annotation[] annotations, MediaType mediaType) {
        return -1;
    }

    @Override
    public void writeTo(Object t, Class type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap httpHeaders, OutputStream entityStream) throws IOException, WebApplicationException {
        entityStream.write(this.mapper.writeValueAsBytes(t));
    }

    @Override
    public boolean isReadable(Class type, Type genericType, Annotation[] annotations, MediaType mediaType) {
        return mediaType.getSubtype().equals("json") || mediaType.getSubtype().endsWith("+json");
    }

    @Override
    public Object readFrom(Class type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap httpHeaders, InputStream entityStream) throws IOException, WebApplicationException {
        if (genericType == null) {
            return this.mapper.readValue(entityStream, type);
        }
        return this.mapper.readValue(entityStream, TypeFactory.defaultInstance().constructType(genericType));
    }

}
    
    
    
    

    




    
    
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