Examples with JsonGenerator javax.json.stream.JsonGenerator used on opensource projects

Example 1 with JsonGenerator

use of javax.json.stream.JsonGenerator in project sling by apache.

the class SimpleDistributionQueueCheckpoint method run.

@Override
public void run() {
    String fileName = queue.getName() + "-checkpoint";
    File checkpointFile = new File(checkpointDirectory, fileName + "-new");
    log.debug("started checkpointing");
    try {
        if (checkpointFile.exists()) {
            assert checkpointFile.delete();
        }
        assert checkpointFile.createNewFile();
        Collection<String> lines = new LinkedList<String>();
        FileOutputStream fileOutputStream = new FileOutputStream(checkpointFile);
        for (DistributionQueueEntry queueEntry : queue.getItems(0, -1)) {
            DistributionQueueItem item = queueEntry.getItem();
            String packageId = item.getPackageId();
            StringWriter w = new StringWriter();
            JsonGenerator jsonWriter = Json.createGenerator(w);
            jsonWriter.writeStartObject();
            for (Map.Entry<String, Object> entry : item.entrySet()) {
                Object value = entry.getValue();
                boolean isArray = value instanceof String[];
                if (isArray) {
                    jsonWriter.writeStartArray(entry.getKey());
                    for (String s : ((String[]) value)) {
                        jsonWriter.write(s);
                    }
                    jsonWriter.writeEnd();
                } else {
                    jsonWriter.write(entry.getKey(), (String) value);
                }
            }
            jsonWriter.writeEnd();
            jsonWriter.close();
            lines.add(packageId + " " + w.toString());
        }
        log.debug("parsed {} items", lines.size());
        IOUtils.writeLines(lines, Charset.defaultCharset().name(), fileOutputStream, Charset.defaultCharset());
        fileOutputStream.flush();
        fileOutputStream.close();
        boolean success = checkpointFile.renameTo(new File(checkpointDirectory, fileName));
        log.debug("checkpoint succeeded: {}", success);
    } catch (Exception e) {
        log.error("failed checkpointing for queue {}", queue.getName());
    }
}

Example 2 with JsonGenerator

use of javax.json.stream.JsonGenerator in project sling by apache.

the class JsonRendererServlet method doGet.

@Override
protected void doGet(SlingHttpServletRequest req, SlingHttpServletResponse resp) throws IOException {
    // Access and check our data
    final Resource r = req.getResource();
    if (ResourceUtil.isNonExistingResource(r)) {
        throw new ResourceNotFoundException("No data to render.");
    }
    int maxRecursionLevels = 0;
    try {
        maxRecursionLevels = getMaxRecursionLevel(req);
    } catch (IllegalArgumentException iae) {
        resp.sendError(HttpServletResponse.SC_BAD_REQUEST, iae.getMessage());
        return;
    }
    resp.setContentType(req.getResponseContentType());
    resp.setCharacterEncoding("UTF-8");
    // We check the tree to see if the nr of nodes isn't bigger than the allowed nr.
    boolean allowDump = true;
    int allowedLevel = 0;
    final boolean tidy = isTidy(req);
    final boolean harray = hasSelector(req, HARRAY);
    ResourceTraversor traversor = null;
    try {
        traversor = new ResourceTraversor(maxRecursionLevels, maximumResults, r);
        allowedLevel = traversor.collectResources();
        if (allowedLevel != -1) {
            allowDump = false;
        }
    } catch (final Exception e) {
        reportException(e);
    }
    try {
        // Dump the resource if we can
        if (allowDump) {
            if (tidy || harray) {
                final JsonRenderer.Options opt = renderer.options().withIndent(tidy ? INDENT_SPACES : 0).withArraysForChildren(harray);
                resp.getWriter().write(renderer.prettyPrint(traversor.getJSONObject(), opt));
            } else {
                // If no rendering options, use the plain toString() method, for
                // backwards compatibility. Output might be slightly different
                // with prettyPrint and no options
                Json.createGenerator(resp.getWriter()).write(traversor.getJSONObject()).close();
            }
        } else {
            // We are not allowed to do the dump.
            // Send a 300
            String tidyUrl = (tidy) ? "tidy." : "";
            resp.setStatus(HttpServletResponse.SC_MULTIPLE_CHOICES);
            JsonGenerator writer = Json.createGenerator(resp.getWriter());
            writer.writeStartArray();
            while (allowedLevel >= 0) {
                writer.write(r.getResourceMetadata().getResolutionPath() + "." + tidyUrl + allowedLevel + ".json");
                allowedLevel--;
            }
            writer.writeEnd();
            writer.close();
        }
    } catch (Exception je) {
        reportException(je);
    }
}

Example 3 with JsonGenerator

use of javax.json.stream.JsonGenerator in project sling by apache.

the class SlingInfoServlet method renderJson.

private void renderJson(final SlingHttpServletResponse response, final Map<String, String> data) throws IOException {
    // render data in JSON format
    response.setContentType("application/json");
    response.setCharacterEncoding("UTF-8");
    final Writer out = response.getWriter();
    final JsonGenerator w = Json.createGenerator(out);
    try {
        w.writeStartObject();
        for (final Map.Entry<String, String> e : data.entrySet()) {
            w.write(e.getKey(), e.getValue());
        }
        w.writeEnd();
    } catch (JsonException jse) {
        out.write(jse.toString());
        out.flush();
    } finally {
        w.flush();
    }
}

Example 4 with JsonGenerator

use of javax.json.stream.JsonGenerator in project libSBOLj by SynBioDex.

the class SBOLWriter method writeJSON.

private static void writeJSON(Writer stream, DocumentRoot<QName> document) throws CoreIoException {
    HashMap<String, Object> config = new HashMap<>();
    config.put(JsonGenerator.PRETTY_PRINTING, true);
    JsonGenerator writer = Json.createGeneratorFactory(config).createGenerator(stream);
    JsonIo jsonIo = new JsonIo();
    jsonIo.createIoWriter(writer).write(StringifyQName.qname2string.mapDR(document));
    writer.flush();
    writer.close();
}

Example 5 with JsonGenerator

use of javax.json.stream.JsonGenerator in project javaee7-samples by javaee-samples.

the class StreamingGeneratorTest method testNestedStructure.

@Test
public void testNestedStructure() throws JSONException {
    JsonGeneratorFactory factory = Json.createGeneratorFactory(null);
    StringWriter w = new StringWriter();
    JsonGenerator gen = factory.createGenerator(w);
    gen.writeStartObject().write("title", "The Matrix").write("year", 1999).writeStartArray("cast").write("Keanu Reaves").write("Laurence Fishburne").write("Carrie-Anne Moss").writeEnd().writeEnd();
    gen.flush();
    JSONAssert.assertEquals("{\"title\":\"The Matrix\",\"year\":1999,\"cast\":[\"Keanu Reaves\",\"Laurence Fishburne\",\"Carrie-Anne Moss\"]}", w.toString(), JSONCompareMode.STRICT);
}