Package dev.morphia.aggregation.expressions

Class TypeExpressions

java.lang.Object

dev.morphia.aggregation.expressions.TypeExpressions

public final class TypeExpressions
extends Object

Defines helper methods for the type expressions

Since:

2.0

Method Summary

Modifier and Type	Method	Description
static ConvertExpression	convert(Object input, ConvertType to)	Converts a value to a specified type.
static Expression	isNumber(Object input)	Checks if the specified expression resolves to one of the numeric BSON types.
static Expression	toBool(Object input)	Converts value to a boolean.
static Expression	toDecimal(Object input)	Converts value to a Decimal128.
static Expression	toDouble(Object input)	Converts value to a double.
static Expression	toInt(Object input)	Converts value to an integer.
static Expression	toLong(Object input)	Converts value to a long.
static Expression	toObjectId(Object input)	Converts value to an ObjectId.
static Expression	toString(Object input)	Converts value to a string.
static Expression	type(Object input)	Return the BSON data type of the field.

Methods inherited from class java.lang.Object

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

Method Details

convert

public static ConvertExpression convert(Object input,
 ConvertType to)

Converts a value to a specified type.

Parameters:

input - the value to process

to - an expression giving the target type

Returns:

the new expression

MongoDB documentation

Aggregration Expression: $convert

isNumber

public static Expression isNumber(Object input)

Checks if the specified expression resolves to one of the numeric BSON types.

Parameters:

input - the value to check

Returns:

the new expression

Since:

2.1

Since server release

4.4

MongoDB documentation

Aggregration Expression: $isNumber

toBool

public static Expression toBool(Object input)

Converts value to a boolean.

Parameters:

input - the value to process

Returns:

the new expression

MongoDB documentation

Aggregration Expression: $toBool

toDecimal

public static Expression toDecimal(Object input)

Converts value to a Decimal128.

Parameters:

input - the value to process

Returns:

the new expression

MongoDB documentation

Aggregration Expression: $toDecimal

toDouble

public static Expression toDouble(Object input)

Converts value to a double.

Parameters:

input - the value to process

Returns:

the new expression

MongoDB documentation

Aggregration Expression: $toDouble

toInt

public static Expression toInt(Object input)

Converts value to an integer.

Parameters:

input - the value to process

Returns:

the new expression

MongoDB documentation

Aggregration Expression: $toInt

toLong

public static Expression toLong(Object input)

Converts value to a long.

Parameters:

input - the value to process

Returns:

the new expression

MongoDB documentation

Aggregration Expression: $toLong

toObjectId

public static Expression toObjectId(Object input)

Converts value to an ObjectId.

Parameters:

input - the value to process

Returns:

the new expression

MongoDB documentation

Aggregration Expression: $toObjectId

toString

public static Expression toString(Object input)

Converts value to a string.

Parameters:

input - the value to process

Returns:

the new expression

MongoDB documentation

Aggregration Expression: $toString

type

public static Expression type(Object input)

Return the BSON data type of the field.

Parameters:

input - the value to process

Returns:

the new expression

MongoDB documentation

Aggregration Expression: $type