Examples of com.facebook.presto.jdbc.internal.jackson.databind.JsonNode

Package com.facebook.presto.jdbc.internal.jackson.databind

Examples of com.facebook.presto.jdbc.internal.jackson.databind.JsonNode

com.facebook.presto.jdbc.internal.jackson.databind.JsonNode
Base class for all JSON nodes, which form the basis of JSON Tree Model that Jackson implements. One way to think of these nodes is to consider them similar to DOM nodes in XML DOM trees.
As a general design rule, most accessors ("getters") are included in this base class, to allow for traversing structure without type casts. Most mutators, however, need to be accessed through specific sub-classes (such as ObjectNode and ArrayNode). This seems sensible because proper type information is generally available when building or modifying trees, but less often when reading a tree (newly built from parsed JSON content).
Actual concrete sub-classes can be found from package {@link com.facebook.presto.jdbc.internal.jackson.databind.node}.

    
    @Override
    public ObjectNode findParent(String fieldName)
    {
        for (JsonNode node : _children) {
            JsonNode parent = node.findParent(fieldName);
            if (parent != null) {
                return (ObjectNode) parent;
            }
        }
        return null;

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            return currentNode().textValue();
        case VALUE_NUMBER_INT:
        case VALUE_NUMBER_FLOAT:
            return String.valueOf(currentNode().numberValue());
        case VALUE_EMBEDDED_OBJECT:
            JsonNode n = currentNode();
            if (n != null && n.isBinary()) {
                // this will convert it to base64
                return n.asText();
            }
        default:
          return (_currToken == null) ? null : _currToken.asString();
        }
    }

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    //public byte getByteValue() throws IOException, JsonParseException


    @Override
    public NumberType getNumberType() throws IOException, JsonParseException {
        JsonNode n = currentNumericNode();
        return (n == null) ? null : n.numberType();
    }

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    @Override
    public Object getEmbeddedObject()
    {
        if (!_closed) {
            JsonNode n = currentNode();
            if (n != null) {
                if (n.isPojo()) {
                    return ((POJONode) n).getPojo();
                }
                if (n.isBinary()) {
                    return ((BinaryNode) n).binaryValue();
                }
            }
        }
        return null;

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    @Override
    public byte[] getBinaryValue(Base64Variant b64variant)
        throws IOException, JsonParseException
    {
        // Multiple possibilities...
        JsonNode n = currentNode();
        if (n != null) { // binary node?
            byte[] data = n.binaryValue();
            // (or TextNode, which can also convert automatically!)
            if (data != null) {
                return data;
            }
            // Or maybe byte[] as POJO?
            if (n.isPojo()) {
                Object ob = ((POJONode) n).getPojo();
                if (ob instanceof byte[]) {
                    return (byte[]) ob;
                }
            }

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    }


    protected JsonNode currentNumericNode()
        throws JsonParseException
    {
        JsonNode n = currentNode();
        if (n == null || !n.isNumber()) {
            JsonToken t = (n == null) ? null : n.asToken();
            throw _constructError("Current token ("+t+") not numeric, can not use numeric value accessors");
        }
        return n;
    }

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    }


    @Override
    public JsonNode path(String fieldName)
    {
        JsonNode n = _children.get(fieldName);
        if (n != null) {
            return n;
        }
        return MissingNode.getInstance();
    }

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        return _children.entrySet().iterator();
    }


    @Override
    public ObjectNode with(String propertyName) {
        JsonNode n = _children.get(propertyName);
        if (n != null) {
            if (n instanceof ObjectNode) {
                return (ObjectNode) n;
            }
            throw new UnsupportedOperationException("Property '" + propertyName
                + "' has value that is not of type ObjectNode (but " + n
                .getClass().getName() + ")");
        }
        ObjectNode result = objectNode();
        _children.put(propertyName, result);
        return result;

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    }


    @Override
    public ArrayNode withArray(String propertyName)
    {
        JsonNode n = _children.get(propertyName);
        if (n != null) {
            if (n instanceof ArrayNode) {
                return (ArrayNode) n;
            }
            throw new UnsupportedOperationException("Property '" + propertyName
                + "' has value that is not of type ArrayNode (but " + n
                .getClass().getName() + ")");
        }
        ArrayNode result = arrayNode();
        _children.put(propertyName, result);
        return result;

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    {
        for (Map.Entry<String, JsonNode> entry : _children.entrySet()) {
            if (fieldName.equals(entry.getKey())) {
                return entry.getValue();
            }
            JsonNode value = entry.getValue().findValue(fieldName);
            if (value != null) {
                return value;
            }
        }
        return null;

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