org.apache.nifi.attribute.expression.language.evaluation.functions

Class JsonPathBaseEvaluator

java.lang.Object

org.apache.nifi.attribute.expression.language.evaluation.StringEvaluator

org.apache.nifi.attribute.expression.language.evaluation.functions.JsonPathBaseEvaluator

All Implemented Interfaces:

Evaluator<String>

Direct Known Subclasses:

JsonPathDeleteEvaluator, JsonPathEvaluator, JsonPathUpdateEvaluator

public abstract class JsonPathBaseEvaluator
extends StringEvaluator

Abstract base JsonPath class with utility methods

See Also:

JsonPathEvaluator, JsonPathDeleteEvaluator

Field Summary

Fields

Modifier and Type	Field and Description
protected static StringQueryResult	EMPTY_RESULT
protected static com.jayway.jsonpath.spi.json.JsonProvider	JSON_PROVIDER
protected Evaluator<String>	jsonPathExp
protected com.jayway.jsonpath.JsonPath	precompiledJsonPathExp
protected static com.jayway.jsonpath.Configuration	STRICT_PROVIDER_CONFIGURATION
protected Evaluator<String>	subject

Constructor Summary

Constructors

Constructor and Description
JsonPathBaseEvaluator(Evaluator<String> subject, Evaluator<String> jsonPathExp)

Method Summary

Modifier and Type	Method and Description
(package private) static com.jayway.jsonpath.JsonPath	compileJsonPathExpression(String exp)
protected com.jayway.jsonpath.DocumentContext	getDocumentContext(EvaluationContext context)
protected com.jayway.jsonpath.JsonPath	getJsonPath(EvaluationContext context)
(package private) static String	getResultRepresentation(Object jsonPathResult, String defaultValue)
Evaluator<?>	getSubjectEvaluator()
(package private) static boolean	isJsonScalar(Object obj)
(package private) static com.jayway.jsonpath.DocumentContext	validateAndEstablishJsonContext(String json)

Methods inherited from class org.apache.nifi.attribute.expression.language.evaluation.StringEvaluator

getEvaluationsRemaining, getResultType, getToken, setToken

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.nifi.attribute.expression.language.evaluation.Evaluator

evaluate

Field Detail

EMPTY_RESULT

protected static final StringQueryResult EMPTY_RESULT

STRICT_PROVIDER_CONFIGURATION

protected static final com.jayway.jsonpath.Configuration STRICT_PROVIDER_CONFIGURATION

JSON_PROVIDER

protected static final com.jayway.jsonpath.spi.json.JsonProvider JSON_PROVIDER

subject

protected final Evaluator<String> subject

jsonPathExp

protected final Evaluator<String> jsonPathExp

precompiledJsonPathExp

protected final com.jayway.jsonpath.JsonPath precompiledJsonPathExp

Constructor Detail

JsonPathBaseEvaluator

public JsonPathBaseEvaluator(Evaluator<String> subject,
                             Evaluator<String> jsonPathExp)

Method Detail

getDocumentContext

protected com.jayway.jsonpath.DocumentContext getDocumentContext(EvaluationContext context)

getJsonPath

protected com.jayway.jsonpath.JsonPath getJsonPath(EvaluationContext context)

getSubjectEvaluator

public Evaluator<?> getSubjectEvaluator()

validateAndEstablishJsonContext

static com.jayway.jsonpath.DocumentContext validateAndEstablishJsonContext(String json)

isJsonScalar

static boolean isJsonScalar(Object obj)

getResultRepresentation

static String getResultRepresentation(Object jsonPathResult,
                                      String defaultValue)

compileJsonPathExpression

static com.jayway.jsonpath.JsonPath compileJsonPathExpression(String exp)