com.couchbase.client.java.query.dsl.functions

Class JsonFunctions

java.lang.Object

com.couchbase.client.java.query.dsl.functions.JsonFunctions

@InterfaceStability.Experimental
 @InterfaceAudience.Public
public class JsonFunctions
extends Object

DSL for N1QL functions in the JSON category.

Since:

2.2

Author:

Simon Baslé

Method Summary

Modifier and Type	Method and Description
static Expression	decodeJson(Expression expression) The returned Expression unmarshals the expression representing a JSON-encoded string into a N1QL value.
static Expression	decodeJson(JsonObject json) The returned Expression unmarshals the JSON constant into a N1QL value.
static Expression	decodeJson(String jsonString) The returned Expression unmarshals the JSON-encoded string into a N1QL value.
static Expression	encodedSize(Expression expression) Returned expression results in the number of bytes in an uncompressed JSON encoding of the value.
static Expression	encodedSize(String expression) Returned expression results in the number of bytes in an uncompressed JSON encoding of the value.
static Expression	encodeJson(Expression expression) Returned expression marshals the N1QL value into a JSON-encoded string.
static Expression	encodeJson(String expression) Returned expression marshals the N1QL value into a JSON-encoded string.
static Expression	polyLength(Expression expression) Returned expression results in length of the value after evaluating the expression.
static Expression	polyLength(String expression) Returned expression results in length of the value after evaluating the expression.

Methods inherited from class java.lang.Object

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

Method Detail

decodeJson

public static Expression decodeJson(Expression expression)

The returned Expression unmarshals the expression representing a JSON-encoded string into a N1QL value. The empty string results in MISSING.

decodeJson

public static Expression decodeJson(JsonObject json)

The returned Expression unmarshals the JSON constant into a N1QL value. The empty string results in MISSING.

decodeJson

public static Expression decodeJson(String jsonString)

The returned Expression unmarshals the JSON-encoded string into a N1QL value. The empty string results in MISSING. The string must represent JSON object marshalled into a JSON String, eg. "{\"test\": true}" (excluding surrounding quotes).

encodeJson

public static Expression encodeJson(Expression expression)

Returned expression marshals the N1QL value into a JSON-encoded string. MISSING becomes the empty string.

encodeJson

public static Expression encodeJson(String expression)

Returned expression marshals the N1QL value into a JSON-encoded string. MISSING becomes the empty string.

encodedSize

public static Expression encodedSize(Expression expression)

Returned expression results in the number of bytes in an uncompressed JSON encoding of the value. The exact size is implementation-dependent. Always returns an integer, and never MISSING or NULL. Returns 0 for MISSING.

encodedSize

public static Expression encodedSize(String expression)

Returned expression results in the number of bytes in an uncompressed JSON encoding of the value. The exact size is implementation-dependent. Always returns an integer, and never MISSING or NULL. Returns 0 for MISSING.

polyLength

public static Expression polyLength(Expression expression)

Returned expression results in length of the value after evaluating the expression. The exact meaning of length depends on the type of the value: - MISSING: MISSING - NULL: NULL - String: The length of the string. - Array: The number of elements in the array. - Object: The number of name/value pairs in the object - Any other value: NULL.

polyLength

public static Expression polyLength(String expression)

Returned expression results in length of the value after evaluating the expression. The exact meaning of length depends on the type of the value: - MISSING: MISSING - NULL: NULL - String: The length of the string. - Array: The number of elements in the array. - Object: The number of name/value pairs in the object - Any other value: NULL.