com.edorasware.commons.core.query.entity

Class LatestVersionOperand

java.lang.Object

com.edorasware.commons.core.query.entity.LatestVersionOperand

public class LatestVersionOperand
extends Object

An operand implementation for version fields which builds Predicate instances that test for the latest, i.e. highest, value of a version field in combination with one or more other fields.

Constructor Summary

Constructors

Constructor and Description
LatestVersionOperand(VersionOperand versionOperand, StringOperand<String> keyOperand) Creates a new operand instance.

Method Summary

Modifier and Type	Method and Description
Predicate	withKey(String key) Builds a predicate representing a key = values matching key AND version = max(all version values with matching key) comparison.

Methods inherited from class java.lang.Object

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

Constructor Detail

LatestVersionOperand

public LatestVersionOperand(VersionOperand versionOperand,
                            StringOperand<String> keyOperand)

Creates a new operand instance.

Parameters:

versionOperand - the version operand for all predicates to be built

keyOperand - the key operand for all predicates to be built

Method Detail

withKey

public Predicate withKey(String key)

Builds a predicate representing a key = values matching key AND version = max(all version values with matching key) comparison.

Parameters:

key - the key of the entities for which to find the latest version

Returns:

the new predicate instance