Example usage for com.fasterxml.jackson.dataformat.xml XmlMapper readTree

Introduction

In this page you can find the example usage for com.fasterxml.jackson.dataformat.xml XmlMapper readTree.

Prototype

@Override
public <T extends TreeNode> T readTree(JsonParser jp) throws IOException, JsonProcessingException 

Source Link

Document

Method to deserialize JSON content as tree expressed using set of JsonNode instances.

Usage

From source file:org.openmhealth.shim.healthvault.HealthvaultShim.java

@Override
public ShimDataResponse getData(final ShimDataRequest shimDataRequest) throws ShimException {
    final HealthVaultDataType healthVaultDataType;
    try {//from w ww .ja  va  2 s  . c  o  m
        healthVaultDataType = HealthVaultDataType
                .valueOf(shimDataRequest.getDataTypeKey().trim().toUpperCase());
    } catch (NullPointerException | IllegalArgumentException e) {
        throw new ShimException("Null or Invalid data type parameter: " + shimDataRequest.getDataTypeKey()
                + " in shimDataRequest, cannot retrieve data.");
    }

    final DateTimeFormatter formatter = DateTimeFormat.forPattern("yyyy-MM-dd'T'hh:mm:ss");

    /***
     * Setup default date parameters
     */
    DateTime today = new DateTime();

    DateTime startDate = shimDataRequest.getStartDate() == null ? today.minusDays(1)
            : shimDataRequest.getStartDate();
    String dateStart = startDate.toString(formatter);

    DateTime endDate = shimDataRequest.getEndDate() == null ? today.plusDays(1) : shimDataRequest.getEndDate();
    String dateEnd = endDate.toString(formatter);

    long numToReturn = shimDataRequest.getNumToReturn() == null || shimDataRequest.getNumToReturn() <= 0 ? 100
            : shimDataRequest.getNumToReturn();

    Request request = new Request();
    request.setMethodName("GetThings");
    request.setInfo("<info>" + "<group max=\"" + numToReturn + "\">" + "<filter>" + "<type-id>"
            + healthVaultDataType.getDataTypeId() + "</type-id>" + "<eff-date-min>" + dateStart
            + "</eff-date-min>" + "<eff-date-max>" + dateEnd + "</eff-date-max>" + "</filter>" + "<format>"
            + "<section>core</section>" + "<xml/>" + "</format>" + "</group>" + "</info>");

    RequestTemplate template = new RequestTemplate(connection);
    return template.makeRequest(shimDataRequest.getAccessParameters(), request,
            new Marshaller<ShimDataResponse>() {
                public ShimDataResponse marshal(InputStream istream) throws Exception {

                    /**
                     * XML Document mappings to JSON don't respect repeatable
                     * tags, they don't get properly serialized into collections.
                     * Thus, we pickup the 'things' via the 'group' root tag
                     * and create a new JSON document out of each 'thing' node.
                     */
                    XmlMapper xmlMapper = new XmlMapper();
                    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
                    DocumentBuilder builder = factory.newDocumentBuilder();
                    Document doc = builder.parse(istream);
                    NodeList nodeList = doc.getElementsByTagName("thing");

                    /**
                     * Collect JsonNode from each 'thing' xml node.
                     */
                    List<JsonNode> thingList = new ArrayList<>();
                    for (int i = 0; i < nodeList.getLength(); i++) {
                        Node node = nodeList.item(i);
                        Document thingDoc = builder.newDocument();
                        Node newNode = thingDoc.importNode(node, true);
                        thingDoc.appendChild(newNode);
                        thingList.add(xmlMapper.readTree(convertDocumentToString(thingDoc)));
                    }

                    /**
                     * Rebuild JSON document structure to pass to deserializer.
                     */
                    String thingsJson = "{\"things\":[";
                    String thingsContent = "";
                    for (JsonNode thingNode : thingList) {
                        thingsContent += thingNode.toString() + ",";
                    }
                    thingsContent = "".equals(thingsContent) ? thingsContent
                            : thingsContent.substring(0, thingsContent.length() - 1);
                    thingsJson += thingsContent;
                    thingsJson += "]}";

                    /**
                     * Return raw re-built 'things' or a normalized JSON document.
                     */
                    ObjectMapper objectMapper = new ObjectMapper();
                    if (shimDataRequest.getNormalize()) {
                        SimpleModule module = new SimpleModule();
                        module.addDeserializer(ShimDataResponse.class, healthVaultDataType.getNormalizer());
                        objectMapper.registerModule(module);
                        return objectMapper.readValue(thingsJson, ShimDataResponse.class);
                    } else {
                        return ShimDataResponse.result(HealthvaultShim.SHIM_KEY,
                                objectMapper.readTree(thingsJson));
                    }
                }
            });
}

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