com.theoryinpractise.halbuilder.jaxrs.JaxRsHalBuilderReaderSupport Maven / Gradle / Ivy

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JAX-RS Support for the HalBuilder Library

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package com.theoryinpractise.halbuilder.jaxrs;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.theoryinpractise.halbuilder.api.ContentRepresentation;
import com.theoryinpractise.halbuilder.api.RepresentationFactory;
import com.theoryinpractise.halbuilder.json.JsonRepresentationFactory;
import com.theoryinpractise.halbuilder.standard.StandardRepresentationFactory;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.ws.rs.Consumes;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.ContextResolver;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.Provider;
import javax.ws.rs.ext.Providers;

@Provider
@Consumes({RepresentationFactory.HAL_JSON, RepresentationFactory.HAL_XML})
public class JaxRsHalBuilderReaderSupport implements MessageBodyReader {

    @Context
    private Providers providers;

    @Override
    public boolean isReadable(Class aClass, Type type, Annotation[] annotations, MediaType mediaType) {
        return ContentRepresentation.class.isAssignableFrom(aClass) && HalBuilderMediaTypes.isSupported(mediaType);
    }

    @Override
    public ContentRepresentation readFrom(Class aClass, Type type, Annotation[] annotations, MediaType mediaType, MultivaluedMap multivaluedMap, InputStream inputStream) throws IOException {
        if (mediaType.isCompatible(HalBuilderMediaTypes.HAL_JSON_TYPE)) {
            return new JsonRepresentationFactory(new ObjectMapperLocator(providers).locate(aClass, mediaType))
                    .readRepresentation(mediaType.toString(), new InputStreamReader(inputStream, HalBuilderMediaTypes.DEFAULT_ENCODING));
        }
	    return new StandardRepresentationFactory().readRepresentation(mediaType.toString(),
                new InputStreamReader(inputStream, HalBuilderMediaTypes.DEFAULT_ENCODING));
    }

}