/
JsonBindingProvider.java
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/
JsonBindingProvider.java
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/*
* Copyright (c) 2017, 2019 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.glassfish.jersey.jsonb.internal;
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.ProcessingException;
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.MultivaluedMap;
import javax.ws.rs.core.NoContentException;
import javax.ws.rs.ext.ContextResolver;
import javax.ws.rs.ext.Provider;
import javax.ws.rs.ext.Providers;
import javax.json.bind.Jsonb;
import javax.json.bind.JsonbBuilder;
import javax.json.bind.JsonbException;
import org.glassfish.jersey.jsonb.LocalizationMessages;
import org.glassfish.jersey.message.internal.AbstractMessageReaderWriterProvider;
import org.glassfish.jersey.message.internal.EntityInputStream;
/**
* Entity provider (reader and writer) for JSONB.
*
* @author Adam Lindenthal
*/
@Provider
@Produces({"application/json", "text/json", "*/*"})
@Consumes({"application/json", "text/json", "*/*"})
public class JsonBindingProvider extends AbstractMessageReaderWriterProvider<Object> {
private static final String JSON = "json";
private static final String PLUS_JSON = "+json";
private Providers providers;
public JsonBindingProvider(@Context Providers providers) {
this.providers = providers;
}
@Override
public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return supportsMediaType(mediaType);
}
@Override
public Object readFrom(Class<Object> type, Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, String> httpHeaders,
InputStream entityStream) throws IOException, WebApplicationException {
final EntityInputStream entityInputStream = new EntityInputStream(entityStream);
entityStream = entityInputStream;
if (entityInputStream.isEmpty()) {
throw new NoContentException(LocalizationMessages.ERROR_JSONB_EMPTYSTREAM());
}
Jsonb jsonb = getJsonb(type);
try {
return jsonb.fromJson(entityStream, genericType);
} catch (JsonbException e) {
throw new ProcessingException(LocalizationMessages.ERROR_JSONB_DESERIALIZATION(), e);
}
}
@Override
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return supportsMediaType(mediaType);
}
@Override
public void writeTo(Object o, Class<?> type, Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, Object> httpHeaders,
OutputStream entityStream) throws IOException, WebApplicationException {
Jsonb jsonb = getJsonb(type);
try {
entityStream.write(jsonb.toJson(o).getBytes(AbstractMessageReaderWriterProvider.getCharset(mediaType)));
entityStream.flush();
} catch (IOException e) {
throw new ProcessingException(LocalizationMessages.ERROR_JSONB_SERIALIZATION(), e);
}
}
private Jsonb getJsonb(Class<?> type) {
final ContextResolver<Jsonb> contextResolver = providers.getContextResolver(Jsonb.class, MediaType.APPLICATION_JSON_TYPE);
if (contextResolver != null) {
return contextResolver.getContext(type);
} else {
return JsonbSingleton.INSTANCE.getInstance();
}
}
/**
* @return true for all media types of the pattern */json and
* */*+json.
*/
private static boolean supportsMediaType(final MediaType mediaType) {
return mediaType.getSubtype().equals(JSON) || mediaType.getSubtype().endsWith(PLUS_JSON);
}
private enum JsonbSingleton {
INSTANCE;
private Jsonb jsonbInstance;
Jsonb getInstance() {
return jsonbInstance;
}
JsonbSingleton() {
this.jsonbInstance = JsonbBuilder.create();
}
}
}