/*
* Copyright 2011, 2012 Odysseus Software 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.
*/
package de.odysseus.staxon.json.jaxrs.jaxb;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.Map;
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.Providers;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import de.odysseus.staxon.json.jaxb.JsonXML;
import de.odysseus.staxon.json.jaxb.JsonXMLBinder;
abstract class AbstractJsonXMLProvider extends JsonXMLBinder implements MessageBodyReader<Object>, MessageBodyWriter<Object> {
protected static <A extends Annotation> A getAnnotation(Annotation[] annotations, Class<A> annotationType) {
for (Annotation annotation : annotations) {
if (annotation.annotationType() == annotationType) {
return annotationType.cast(annotation);
}
}
return null;
}
private final JsonXMLContextStore store;
public AbstractJsonXMLProvider(Providers providers) {
super(true);
this.store = new JsonXMLContextStore(providers);
}
protected JsonXML getJsonXML(Class<?> type, Annotation[] resourceAnnotations) {
JsonXML result = getAnnotation(resourceAnnotations, JsonXML.class);
if (result == null) {
result = type.getAnnotation(JsonXML.class);
}
return result;
}
protected boolean isSupported(MediaType mediaType) {
return "json".equalsIgnoreCase(mediaType.getSubtype()) || mediaType.getSubtype().endsWith("+json");
}
protected String getCharset(MediaType mediaType) {
Map<String, String> parameters = mediaType.getParameters();
return parameters.containsKey("charset") ? parameters.get("charset") : "UTF-8";
}
protected JAXBContext getContext(Class<?> type, MediaType mediaType) throws JAXBException {
return store.getContext(type, mediaType);
}
protected abstract boolean isReadWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType);
@Override
public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return isReadWriteable(type, genericType, annotations, mediaType);
}
@Override
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return isReadWriteable(type, genericType, annotations, mediaType);
}
@Override
public long getSize(Object t, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return -1;
}
public abstract Object read(
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, String> httpHeaders,
Reader entityStream) throws IOException, WebApplicationException;
@Override
public final Object readFrom(
Class<Object> type, // <-- how sad...
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, String> httpHeaders,
InputStream entityStream) throws IOException, WebApplicationException {
Reader reader = new InputStreamReader(entityStream, getCharset(mediaType));
return read(type, genericType, annotations, mediaType, httpHeaders, reader);
}
public abstract void write(
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, Object> httpHeaders,
Writer entityStream,
Object entry) throws IOException, WebApplicationException;
@Override
public final void writeTo(
Object entry,
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, Object> httpHeaders,
OutputStream entityStream) throws IOException, WebApplicationException {
Writer writer = new OutputStreamWriter(entityStream, getCharset(mediaType));
write(type, genericType, annotations, mediaType, httpHeaders, writer, entry);
}
}