com.manorrock.oyena.lifecycle.rest.DefaultJsonResponseWriter Maven / Gradle / Ivy
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* Copyright (c) 2002-2023 Manorrock.com. All Rights Reserved.
*
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* contributors may be used to endorse or promote products derived from this
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*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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package com.manorrock.oyena.lifecycle.rest;
import jakarta.enterprise.context.ApplicationScoped;
import jakarta.faces.FacesException;
import jakarta.faces.context.FacesContext;
import jakarta.json.bind.Jsonb;
import jakarta.json.bind.JsonbBuilder;
import java.io.IOException;
import java.io.Writer;
/**
* The JSON (application/json) response writer.
*
* @author Manfred Riem ([email protected])
*/
@ApplicationScoped
@RestResponseWriterContentType("application/json")
public class DefaultJsonResponseWriter implements RestResponseWriter {
/**
* Stores the JSON-B builder.
*/
private final JsonbBuilder jsonbBuilder;
/**
* Stores the JSON-B context.
*/
private Jsonb jsonb;
/**
* Constructor.
*/
public DefaultJsonResponseWriter() {
jsonbBuilder = JsonbBuilder.newBuilder();
jsonb = jsonbBuilder.build();
}
/**
* Write the response.
*
* @param facesContext the Faces context.
*/
@Override
public void writeResponse(FacesContext facesContext) {
Object result = facesContext.getAttributes().get(
RestLifecycle.class.getPackage().getName() + ".RestResult");
if (result == null) {
try {
facesContext.getExternalContext().responseSendError(204, "No content");
facesContext.responseComplete();
} catch (IOException ioe) {
throw new FacesException(ioe);
}
} else {
try {
Writer writer = facesContext.getExternalContext().getResponseOutputWriter();
writer.write(jsonb.toJson(result));
writer.flush();
facesContext.responseComplete();
} catch (IOException ioe) {
throw new FacesException(ioe);
}
}
}
}