/**
* Copyright (C) 2012 - present by OpenGamma Inc. and the OpenGamma group of companies
*
* Please see distribution for license.
*/
package com.opengamma.web.analytics.json;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
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.MessageBodyWriter;
import javax.ws.rs.ext.Provider;
import com.opengamma.util.ArgumentChecker;
import com.opengamma.web.analytics.GridColumnsJsonWriter;
import com.opengamma.web.analytics.PortfolioGridStructure;
import com.opengamma.web.analytics.PrimitivesGridStructure;
/**
* Writes an instance of {@link PortfolioGridStructure} to JSON.
*/
@Provider
@Produces(MediaType.APPLICATION_JSON)
public class PrimitivesGridStructureMessageBodyWriter implements MessageBodyWriter<PrimitivesGridStructure> {
/** Writes the JSON. */
private final GridColumnsJsonWriter _writer;
/**
* @param writer Writes the JSON
*/
public PrimitivesGridStructureMessageBodyWriter(GridColumnsJsonWriter writer) {
ArgumentChecker.notNull(writer, "writer");
_writer = writer;
}
@Override
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return type.equals(PrimitivesGridStructure.class);
}
@Override
public long getSize(PrimitivesGridStructure gridStructure,
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType) {
// TODO this means unknown size. is it worth encoding it twice to find out the size?
return -1;
}
@Override
public void writeTo(PrimitivesGridStructure gridStructure,
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, Object> httpHeaders,
OutputStream entityStream) throws IOException, WebApplicationException {
String columnsJson = _writer.getJson(gridStructure.getColumnStructure().getGroups());
entityStream.write(("{\"columnSets\":" + columnsJson + ",\"rowCount\":" + gridStructure.getRowCount() + "}").getBytes());
}
}