com.edorasware.commons.core.query

Class PredicateUtils

java.lang.Object

com.edorasware.commons.core.query.PredicateUtils

public final class PredicateUtils
extends Object

Utility class to deal with predicates.

Field Summary

Fields

Modifier and Type	Field and Description
static Set<Class<? extends Predicate>>	SUPPORTED_PREDICATES Supported predicates which are not filtered out in the removeNotSupportedPredicates(List) (List)} method.

Method Summary

Modifier and Type	Method and Description
static void	assertNoNullPredicates(List<? extends Predicate> predicates) Asserts that all given predicates are not null.
static boolean	containsPredicate(Predicate predicateToCheck, Class<? extends Predicate> predicateClass) Returns true if the given Predicate class is contained in the given predicate to check.
static <T extends Predicate> com.google.common.collect.ImmutableList<T>	removeEmptyPredicates(List<? extends T> predicates) Removes all empty predicates from the given non-null predicates.
static <T extends Predicate> com.google.common.collect.ImmutableList<T>	removeNotSupportedPredicates(List<? extends T> predicates) Removes all not supported (SUPPORTED_PREDICATES) predicates from the given non-null predicates.

Methods inherited from class java.lang.Object

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

Field Detail

SUPPORTED_PREDICATES

public static final Set<Class<? extends Predicate>> SUPPORTED_PREDICATES

Supported predicates which are not filtered out in the removeNotSupportedPredicates(List) (List)} method.

Method Detail

assertNoNullPredicates

public static void assertNoNullPredicates(List<? extends Predicate> predicates)

Asserts that all given predicates are not null.

Parameters:

predicates - the predicates to assert

removeEmptyPredicates

public static <T extends Predicate> com.google.common.collect.ImmutableList<T> removeEmptyPredicates(List<? extends T> predicates)

Removes all empty predicates from the given non-null predicates.

Type Parameters:

T - the type of the predicate

Parameters:

predicates - the predicates to check

Returns:

a list of predicates without the empty predicates

removeNotSupportedPredicates

public static <T extends Predicate> com.google.common.collect.ImmutableList<T> removeNotSupportedPredicates(List<? extends T> predicates)

Removes all not supported (SUPPORTED_PREDICATES) predicates from the given non-null predicates.

Type Parameters:

T - the type of the predicate

Parameters:

predicates - the predicates to check

Returns:

a list of predicates without the not supported predicates

containsPredicate

public static boolean containsPredicate(Predicate predicateToCheck,
                                        Class<? extends Predicate> predicateClass)

Returns true if the given Predicate class is contained in the given predicate to check.

Parameters:

predicateToCheck - the predicate to check

predicateClass - the predicate class to check within the predicate to check

Returns:

true if a predicate of the given class is in the predicate to check