java.lang.Object
- com.couchbase.client.java.query.dsl.functions.TypeFunctions

```
@Experimental
@Public
public class TypeFunctions
extends Object
```
DSL for N1QL functions in the Type category.

Since:

2.2

Author:

Simon Baslé

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static Expression`	`isArray(Expression expression)`	Returned expression results in True if expression is an array, otherwise returns MISSING, NULL or false.
`static Expression`	`isArray(String expression)`	Returned expression results in True if expression is an array, otherwise returns MISSING, NULL or false.
`static Expression`	`isAtom(Expression expression)`	Returned expression results in True if expression is a Boolean, number, or string, otherwise returns MISSING, NULL or false.
`static Expression`	`isAtom(String expression)`	Returned expression results in True if expression is a Boolean, number, or string, otherwise returns MISSING, NULL or false.
`static Expression`	`isBoolean(Expression expression)`	Returned expression results in True if expression is a Boolean, otherwise returns MISSING, NULL or false.
`static Expression`	`isBoolean(String expression)`	Returned expression results in True if expression is a Boolean, otherwise returns MISSING, NULL or false.
`static Expression`	`isNumber(Expression expression)`	Returned expression results in True if expression is a number, otherwise returns MISSING, NULL or false.
`static Expression`	`isNumber(String expression)`	Returned expression results in True if expression is a number, otherwise returns MISSING, NULL or false.
`static Expression`	`isObject(Expression expression)`	Returned expression results in True if expression is an object, otherwise returns MISSING, NULL or false.
`static Expression`	`isObject(String expression)`	Returned expression results in True if expression is an object, otherwise returns MISSING, NULL or false.
`static Expression`	`isString(Expression expression)`	Returned expression results in True if expression is a string, otherwise returns MISSING, NULL or false.
`static Expression`	`isString(String expression)`	Returned expression results in True if expression is a string, otherwise returns MISSING, NULL or false.
`static Expression`	`toArray(Expression expression)`	Returned expression results in an array as follows: - MISSING is MISSING.
`static Expression`	`toArray(String expression)`	Returned expression results in an array as follows: - MISSING is MISSING.
`static Expression`	`toAtom(Expression expression)`	Returned expression results in an atomic value as follows: - MISSING is MISSING.
`static Expression`	`toAtom(String expression)`	Returned expression results in an atomic value as follows: - MISSING is MISSING.
`static Expression`	`toBoolean(Expression expression)`	Returned expression results in a Boolean as follows: - MISSING is MISSING.
`static Expression`	`toBoolean(String expression)`	Returned expression results in a Boolean as follows: - MISSING is MISSING.
`static Expression`	`toNumber(Expression expression)`	Returned expression results in a number as follows: - MISSING is MISSING.
`static Expression`	`toNumber(String expression)`	Returned expression results in a number as follows: - MISSING is MISSING.
`static Expression`	`toObject(Expression expression)`	Returned expression results in an object as follows: - MISSING is MISSING.
`static Expression`	`toObject(String expression)`	Returned expression results in an object as follows: - MISSING is MISSING.
`static Expression`	`toString(Expression expression)`	Returned expression results in a string as follows: - MISSING is MISSING.
`static Expression`	`toString(String expression)`	Returned expression results in a string as follows: - MISSING is MISSING.
`static Expression`	`type(Expression expression)`	Returned expression results in one of the following strings, based on the value of expression: - "missing" - "null" - "boolean" - "number" - "string" - "array" - "object" - "binary"
`static Expression`	`type(String expression)`	Returned expression results in one of the following strings, based on the value of expression: - "missing" - "null" - "boolean" - "number" - "string" - "array" - "object" - "binary"

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - isArray
```
public static Expression isArray(Expression expression)
```
    Returned expression results in True if expression is an array, otherwise returns MISSING, NULL or false.
  - isArray
```
public static Expression isArray(String expression)
```
    Returned expression results in True if expression is an array, otherwise returns MISSING, NULL or false.
  - isAtom
```
public static Expression isAtom(Expression expression)
```
    Returned expression results in True if expression is a Boolean, number, or string, otherwise returns MISSING, NULL or false.
  - isAtom
```
public static Expression isAtom(String expression)
```
    Returned expression results in True if expression is a Boolean, number, or string, otherwise returns MISSING, NULL or false.
  - isBoolean
```
public static Expression isBoolean(Expression expression)
```
    Returned expression results in True if expression is a Boolean, otherwise returns MISSING, NULL or false.
  - isBoolean
```
public static Expression isBoolean(String expression)
```
    Returned expression results in True if expression is a Boolean, otherwise returns MISSING, NULL or false.
  - isNumber
```
public static Expression isNumber(Expression expression)
```
    Returned expression results in True if expression is a number, otherwise returns MISSING, NULL or false.
  - isNumber
```
public static Expression isNumber(String expression)
```
    Returned expression results in True if expression is a number, otherwise returns MISSING, NULL or false.
  - isObject
```
public static Expression isObject(Expression expression)
```
    Returned expression results in True if expression is an object, otherwise returns MISSING, NULL or false.
  - isObject
```
public static Expression isObject(String expression)
```
    Returned expression results in True if expression is an object, otherwise returns MISSING, NULL or false.
  - isString
```
public static Expression isString(Expression expression)
```
    Returned expression results in True if expression is a string, otherwise returns MISSING, NULL or false.
  - isString
```
public static Expression isString(String expression)
```
    Returned expression results in True if expression is a string, otherwise returns MISSING, NULL or false.
  - type
```
public static Expression type(Expression expression)
```
    Returned expression results in one of the following strings, based on the value of expression: - "missing" - "null" - "boolean" - "number" - "string" - "array" - "object" - "binary"
  - type
```
public static Expression type(String expression)
```
    Returned expression results in one of the following strings, based on the value of expression: - "missing" - "null" - "boolean" - "number" - "string" - "array" - "object" - "binary"
  - toArray
```
public static Expression toArray(Expression expression)
```
    Returned expression results in an array as follows: - MISSING is MISSING. - NULL is NULL. - Arrays are themselves. - All other values are wrapped in an array. - TOATOM(expression)
  - toArray
```
public static Expression toArray(String expression)
```
    Returned expression results in an array as follows: - MISSING is MISSING. - NULL is NULL. - Arrays are themselves. - All other values are wrapped in an array. - TOATOM(expression)
  - toAtom
```
public static Expression toAtom(Expression expression)
```
    Returned expression results in an atomic value as follows: - MISSING is MISSING. - NULL is NULL. - Arrays of length 1 are the result of TOATOM() on their single element. - Objects of length 1 are the result of TOATOM() on their single value. - Booleans, numbers, and strings are themselves. - All other values are NULL.
  - toAtom
```
public static Expression toAtom(String expression)
```
    Returned expression results in an atomic value as follows: - MISSING is MISSING. - NULL is NULL. - Arrays of length 1 are the result of TOATOM() on their single element. - Objects of length 1 are the result of TOATOM() on their single value. - Booleans, numbers, and strings are themselves. - All other values are NULL.
  - toBoolean
```
public static Expression toBoolean(Expression expression)
```
    Returned expression results in a Boolean as follows: - MISSING is MISSING. - NULL is NULL. - False is false. - Numbers +0, -0, and NaN are false. - Empty strings, arrays, and objects are false. - All other values are true.
  - toBoolean
```
public static Expression toBoolean(String expression)
```
    Returned expression results in a Boolean as follows: - MISSING is MISSING. - NULL is NULL. - False is false. - Numbers +0, -0, and NaN are false. - Empty strings, arrays, and objects are false. - All other values are true.
  - toNumber
```
public static Expression toNumber(Expression expression)
```
    Returned expression results in a number as follows: - MISSING is MISSING. - NULL is NULL. - False is 0. - True is 1. - Numbers are themselves. - Strings that parse as numbers are those numbers. - All other values are NULL.
  - toNumber
```
public static Expression toNumber(String expression)
```
    Returned expression results in a number as follows: - MISSING is MISSING. - NULL is NULL. - False is 0. - True is 1. - Numbers are themselves. - Strings that parse as numbers are those numbers. - All other values are NULL.
  - toObject
```
public static Expression toObject(Expression expression)
```
    Returned expression results in an object as follows: - MISSING is MISSING. - NULL is NULL. - Objects are themselves. - All other values are the empty object.
  - toObject
```
public static Expression toObject(String expression)
```
    Returned expression results in an object as follows: - MISSING is MISSING. - NULL is NULL. - Objects are themselves. - All other values are the empty object.
  - toString
```
public static Expression toString(Expression expression)
```
    Returned expression results in a string as follows: - MISSING is MISSING. - NULL is NULL. - False is "false". - True is "true". - Numbers are their string representation. - Strings are themselves. - All other values are NULL.
  - toString
```
public static Expression toString(String expression)
```
    Returned expression results in a string as follows: - MISSING is MISSING. - NULL is NULL. - False is "false". - True is "true". - Numbers are their string representation. - Strings are themselves. - All other values are NULL.

Class TypeFunctions

Method Summary

Methods inherited from class java.lang.Object

Method Detail

isArray

isArray

isAtom

isAtom

isBoolean

isBoolean

isNumber

isNumber

isObject

isObject

isString

isString

type

type

toArray

toArray

toAtom

toAtom

toBoolean

toBoolean

toNumber

toNumber

toObject

toObject

toString

toString