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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.restapi;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectWriter;
import com.yahoo.container.jdisc.HttpResponse;
import java.io.IOException;
import java.io.OutputStream;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* A JSON response using Jackson for serialization.
*
* @author bjorncs
*/
public class JacksonJsonResponse<T> extends HttpResponse {
private static final Logger log = Logger.getLogger(JacksonJsonResponse.class.getName());
private final ObjectMapper jsonMapper;
private final boolean prettyPrint;
private final T entity;
public JacksonJsonResponse(int statusCode, T entity) {
this(statusCode, entity, false);
}
public JacksonJsonResponse(int statusCode, T entity, boolean prettyPrint) {
this(statusCode, entity, JacksonJsonMapper.instance, prettyPrint);
}
public JacksonJsonResponse(int statusCode, T entity, ObjectMapper jsonMapper) {
this(statusCode, entity, jsonMapper, false);
}
public JacksonJsonResponse(int statusCode, T entity, ObjectMapper jsonMapper, boolean prettyPrint) {
super(statusCode);
this.entity = entity;
this.jsonMapper = jsonMapper;
this.prettyPrint = prettyPrint;
}
@Override
public void render(OutputStream outputStream) throws IOException {
ObjectWriter writer = prettyPrint ? jsonMapper.writerWithDefaultPrettyPrinter() : jsonMapper.writer();
if (log.isLoggable(Level.FINE)) {
String json = writer.writeValueAsString(entity);
log.log(Level.FINE, "Writing the following JSON to response output stream:\n" + json);
outputStream.write(json.getBytes());
} else {
writer.writeValue(outputStream, entity);
}
}
@Override public String getContentType() { return "application/json"; }
public T getEntity() { return entity; }
}
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