com.hazelcast.json.internal

Class JsonSchemaHelper

java.lang.Object

com.hazelcast.json.internal.JsonSchemaHelper

public final class JsonSchemaHelper
extends Object

Responsible for creating and using JsonSchemaNodes.

Method Summary

Modifier and Type	Method and Description
static JsonPattern	createPattern(NavigableJsonInputAdapter input, JsonSchemaNode schemaNode, JsonPathCursor path) Creates a JsonPattern for given query path.
static JsonSchemaNode	createSchema(com.fasterxml.jackson.core.JsonParser parser) Creates a description out of a JsonValue.
static JsonValue	findValueWithPattern(NavigableJsonInputAdapter input, JsonSchemaNode schemaNode, JsonPattern expectedPattern, JsonPathCursor attributePath) Extract the JsonValue that is stored in attributePath in input.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

createPattern

public static JsonPattern createPattern(NavigableJsonInputAdapter input,
                                        JsonSchemaNode schemaNode,
                                        JsonPathCursor path)

Creates a JsonPattern for given query path. If the path matches a terminal value in the schema, then the schema is returned. Otherwise this method returns null. If given path has "any", pattern is created only upto that part. The rest is omitted.

Parameters:

input - a buffer containing the queried object.

schemaNode - the description of the given object

path - query path

Returns:

a pattern object matching the path or null when path does not match a terminal value

Throws:

IOException

findValueWithPattern

public static JsonValue findValueWithPattern(NavigableJsonInputAdapter input,
                                             JsonSchemaNode schemaNode,
                                             JsonPattern expectedPattern,
                                             JsonPathCursor attributePath)
                                      throws IOException

Extract the JsonValue that is stored in attributePath in input. This method validates expectedPattern using attributePath while extraction. If expectedPattern points to invalid or wrong attributes at any point, this method returns null NOTE: this method cannot handle patterns with "any" in it.

Parameters:

input - a byte array containing the target object

schemaNode - valid schema description to the target object. The behavior is undefined if description does not match the actual object

expectedPattern - this cannot contain "any"

attributePath - this cannot contain "any"

Returns:

JsonValue extracted or null

Throws:

IOException

createSchema

public static JsonSchemaNode createSchema(com.fasterxml.jackson.core.JsonParser parser)
                                   throws IOException

Creates a description out of a JsonValue. The parser must be pointing to the start of the input.

Parameters:

parser -

Returns:

Throws:

IOException