Package dev.morphia.aggregation.expressions

Class ComparisonExpressions

java.lang.Object

dev.morphia.aggregation.expressions.ComparisonExpressions

public final class ComparisonExpressions
extends Object

Defines helper methods for the comparison expressions

Since:

2.0

Method Summary

Modifier and Type	Method	Description
static dev.morphia.aggregation.expressions.impls.Expression	cmp(dev.morphia.aggregation.expressions.impls.Expression first, dev.morphia.aggregation.expressions.impls.Expression second)	Returns 0 if the two values are equivalent, 1 if the first value is greater than the second, and -1 if the first value is less than the second.
static dev.morphia.aggregation.expressions.impls.Expression	eq(dev.morphia.aggregation.expressions.impls.Expression first, dev.morphia.aggregation.expressions.impls.Expression second)	Returns true if the values are equivalent.
static dev.morphia.aggregation.expressions.impls.Expression	gt(dev.morphia.aggregation.expressions.impls.Expression first, dev.morphia.aggregation.expressions.impls.Expression second)	Compares two values and returns: true when the first value is greater than the second value.
static dev.morphia.aggregation.expressions.impls.Expression	gte(dev.morphia.aggregation.expressions.impls.Expression first, dev.morphia.aggregation.expressions.impls.Expression second)	Compares two values and returns: true when the first value is greater than or equivalent to the second value.
static dev.morphia.aggregation.expressions.impls.Expression	lt(dev.morphia.aggregation.expressions.impls.Expression first, dev.morphia.aggregation.expressions.impls.Expression second)	Returns true if the first value is less than the second.
static dev.morphia.aggregation.expressions.impls.Expression	lte(dev.morphia.aggregation.expressions.impls.Expression first, dev.morphia.aggregation.expressions.impls.Expression second)	Compares two values and returns: true when the first value is less than or equivalent to the second value.
static dev.morphia.aggregation.expressions.impls.Expression	ne(dev.morphia.aggregation.expressions.impls.Expression first, dev.morphia.aggregation.expressions.impls.Expression second)	Returns true if the values are not equivalent.

Methods inherited from class java.lang.Object

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

Method Detail

cmp

public static dev.morphia.aggregation.expressions.impls.Expression cmp(dev.morphia.aggregation.expressions.impls.Expression first,
                                                                       dev.morphia.aggregation.expressions.impls.Expression second)

Returns 0 if the two values are equivalent, 1 if the first value is greater than the second, and -1 if the first value is less than the second.

Parameters:

first - an expression for the value to compare

second - an expression yielding the value to check against

Returns:

the new expression

MongoDB documentation

Aggregration Expression: $cmp

eq

public static dev.morphia.aggregation.expressions.impls.Expression eq(dev.morphia.aggregation.expressions.impls.Expression first,
                                                                      @Nullable
                                                                      dev.morphia.aggregation.expressions.impls.Expression second)

Returns true if the values are equivalent.

Parameters:

first - an expression for the value to compare

second - an expression yielding the value to check against

Returns:

the new expression

MongoDB documentation

Aggregration Expression: $eq

gt

public static dev.morphia.aggregation.expressions.impls.Expression gt(dev.morphia.aggregation.expressions.impls.Expression first,
                                                                      dev.morphia.aggregation.expressions.impls.Expression second)

Compares two values and returns:

true when the first value is greater than the second value. false when the first value is less than or equivalent to the second value.

Parameters:

first - an expression for the value to compare

second - an expression yielding the value to check against

Returns:

the new expression

MongoDB documentation

Aggregration Expression: $gt

gte

public static dev.morphia.aggregation.expressions.impls.Expression gte(dev.morphia.aggregation.expressions.impls.Expression first,
                                                                       dev.morphia.aggregation.expressions.impls.Expression second)

Compares two values and returns:

true when the first value is greater than or equivalent to the second value. false when the first value is less than the second value.

Parameters:

first - an expression for the value to compare

second - an expression yielding the value to check against

Returns:

the new expression

MongoDB documentation

Aggregration Expression: $gte

lt

public static dev.morphia.aggregation.expressions.impls.Expression lt(dev.morphia.aggregation.expressions.impls.Expression first,
                                                                      dev.morphia.aggregation.expressions.impls.Expression second)

Returns true if the first value is less than the second.

Parameters:

first - an expression for the value to compare

second - an expression yielding the value to check against

Returns:

the new expression

MongoDB documentation

Aggregration Expression: $lt

lte

public static dev.morphia.aggregation.expressions.impls.Expression lte(dev.morphia.aggregation.expressions.impls.Expression first,
                                                                       dev.morphia.aggregation.expressions.impls.Expression second)

Compares two values and returns:

true when the first value is less than or equivalent to the second value. false when the first value is greater than the second value.

Parameters:

first - an expression for the value to compare

second - an expression yielding the value to check against

Returns:

the new expression

MongoDB documentation

Aggregration Expression: $lte

ne

public static dev.morphia.aggregation.expressions.impls.Expression ne(dev.morphia.aggregation.expressions.impls.Expression first,
                                                                      @Nullable
                                                                      dev.morphia.aggregation.expressions.impls.Expression second)

Returns true if the values are not equivalent.

Parameters:

first - an expression for the value to compare

second - an expression yielding the value to check against

Returns:

the new expression

MongoDB documentation

Aggregration Expression: $ne