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Explore the source code of the class JsonRootElementProvider.java

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 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
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package org.glassfish.jersey.media.json.internal.entity;

import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.nio.charset.Charset;

import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response.Status;
import javax.ws.rs.ext.Providers;

import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

import org.glassfish.jersey.media.json.JsonJaxbContext;
import org.glassfish.jersey.media.json.JsonMarshaller;
import org.glassfish.jersey.media.json.internal.reader.JsonFormatException;
import org.glassfish.jersey.message.internal.AbstractRootElementJaxbProvider;

/**
 * JSON message entity media type provider (reader & writer) for JAXB types that
 * are annotated with {@link javax.xml.bind.annotation.XmlRootElement @XmlRootElement}
 * or {@link javax.xml.bind.annotation.XmlType @XmlType}.
 *
 * @author Paul Sandoz
 * @author Jakub Podlesak
 */
public class JsonRootElementProvider extends AbstractRootElementJaxbProvider {

    boolean jacksonEntityProviderTakesPrecedence = false;

    JsonRootElementProvider(Providers ps) {
        super(ps);
    }

    JsonRootElementProvider(Providers ps, MediaType mt) {
        super(ps, mt);
    }

// TODO add support for configuration from injected features&properties
//    @Context
//    @Override
//    public void setConfiguration(FeaturesAndProperties fp) {
//        super.setConfiguration(fp);
//        jacksonEntityProviderTakesPrecedence = fp.getFeature(JSONConfiguration.FEATURE_POJO_MAPPING);
//    }

    @Override
    public boolean isReadable(Class type, Type genericType, Annotation[] annotations, MediaType mediaType) {
        return !jacksonEntityProviderTakesPrecedence && super.isReadable(type, genericType, annotations, mediaType);
    }

    @Override
    public boolean isWriteable(Class type, Type genericType, Annotation[] annotations, MediaType mediaType) {
        return !jacksonEntityProviderTakesPrecedence && super.isWriteable(type, genericType, annotations, mediaType);
    }

    @Produces("application/json")
    @Consumes("application/json")
    public static final class App extends JsonRootElementProvider {

        public App(@Context Providers ps) {
            super(ps, MediaType.APPLICATION_JSON_TYPE);
        }
    }

    @Produces("*/*")
    @Consumes("*/*")
    public static final class General extends JsonRootElementProvider {

        public General(@Context Providers ps) {
            super(ps);
        }

        @Override
        protected boolean isSupported(MediaType m) {
            return !jacksonEntityProviderTakesPrecedence && m.getSubtype().endsWith("+json");
        }
    }

    @Override
    protected final Object readFrom(Class type, MediaType mediaType,
            Unmarshaller u, InputStream entityStream)
            throws JAXBException {
        final Charset c = getCharset(mediaType);

        try {
            return JsonJaxbContext.getJSONUnmarshaller(u).
                    unmarshalFromJSON(new InputStreamReader(entityStream, c), type);
        } catch (JsonFormatException e) {
            throw new WebApplicationException(e, Status.BAD_REQUEST);
        }
    }

    @Override
    protected void writeTo(Object t, MediaType mediaType, Charset c,
            Marshaller m, OutputStream entityStream)
            throws JAXBException {
        JsonMarshaller jsonMarshaller = JsonJaxbContext.getJSONMarshaller(m);
        if (isFormattedOutput()) {
            jsonMarshaller.setProperty(JsonMarshaller.FORMATTED, true);
        }
        jsonMarshaller.marshallToJSON(t, new OutputStreamWriter(entityStream, c));
    }
}