JsonStringProvider.java

/**
 * Copyright (C) 2009-2012 the original author or authors.
 * See the notice.md file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * 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 org.fusesource.restygwt.server.complex;

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

import javax.ws.rs.Consumes;
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;

@Provider
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
public class JsonStringProvider implements MessageBodyWriter<String>, MessageBodyReader<String>
{
	@Override
	public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
	{
		return type == String.class && MediaType.APPLICATION_JSON_TYPE.isCompatible(mediaType);
	}

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

	@Override
	public void writeTo(String t, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream) throws IOException, WebApplicationException
	{
		// TODO: issue of encoding here???
		new ObjectMapper().writeValue(entityStream, t);
	}

	@Override
	public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
	{
		return type == String.class && MediaType.APPLICATION_JSON_TYPE.isCompatible(mediaType);
	}

	@Override
	public String readFrom(Class<String> type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap<String, String> httpHeaders, InputStream entityStream) throws IOException, WebApplicationException
	{
		// TODO: issue of encoding here???
		return new ObjectMapper().readValue(entityStream, String.class);
	}
}