Package com.datasqrl.json

Class JsonExtract

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

org.apache.flink.table.functions.ScalarFunction

com.datasqrl.json.JsonExtract

All Implemented Interfaces:

Serializable, org.apache.flink.table.functions.FunctionDefinition

public class JsonExtract
extends org.apache.flink.table.functions.ScalarFunction

Extracts a value from the JSON object based on the provided JSON path. An optional third argument can be provided to specify a default value when the given JSON path does not yield a value for the JSON object.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
JsonExtract()

Method Summary

Modifier and Type	Method	Description
String	eval(com.datasqrl.json.FlinkJsonType input, String pathSpec)
Boolean	eval(com.datasqrl.json.FlinkJsonType input, String pathSpec, Boolean defaultValue)
Double	eval(com.datasqrl.json.FlinkJsonType input, String pathSpec, Double defaultValue)
Integer	eval(com.datasqrl.json.FlinkJsonType input, String pathSpec, Integer defaultValue)
String	eval(com.datasqrl.json.FlinkJsonType input, String pathSpec, String defaultValue)

Methods inherited from class org.apache.flink.table.functions.ScalarFunction

getKind, getParameterTypes, getResultType, getTypeInference

Methods inherited from class org.apache.flink.table.functions.UserDefinedFunction

close, functionIdentifier, open, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.flink.table.functions.FunctionDefinition

getRequirements, isDeterministic

Constructor Detail

JsonExtract

public JsonExtract()

Method Detail

eval

public String eval(com.datasqrl.json.FlinkJsonType input,
                   String pathSpec)

eval

public String eval(com.datasqrl.json.FlinkJsonType input,
                   String pathSpec,
                   String defaultValue)

eval

public Boolean eval(com.datasqrl.json.FlinkJsonType input,
                    String pathSpec,
                    Boolean defaultValue)

eval

public Double eval(com.datasqrl.json.FlinkJsonType input,
                   String pathSpec,
                   Double defaultValue)

eval

public Integer eval(com.datasqrl.json.FlinkJsonType input,
                    String pathSpec,
                    Integer defaultValue)