Package org.apache.druid.query.filter

Class FallbackPredicate<T>

java.lang.Object

org.apache.druid.query.filter.FallbackPredicate<T>

All Implemented Interfaces:

com.google.common.base.Predicate<T>, Predicate<T>

public class FallbackPredicate<T>
extends Object
implements com.google.common.base.Predicate<T>

Predicate that wraps another predicate and can catch ClassCastException from some Comparator and degrades into casting input to an expected ExpressionType once an exception is encountered. Useful when processing data that might be mixed types, despite what the column capabilities might claim the type is, such as variant 'auto' types. This class is not thread-safe.

Constructor Summary

Constructors

Constructor	Description
FallbackPredicate(com.google.common.base.Predicate<T> delegate, ExpressionType expectedType)

Method Summary

Modifier and Type	Method	Description
boolean	apply(T input)

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.google.common.base.Predicate

equals, test

Methods inherited from interface java.util.function.Predicate

and, negate, or

Constructor Detail

FallbackPredicate

public FallbackPredicate(com.google.common.base.Predicate<T> delegate,
                         ExpressionType expectedType)

Method Detail

apply

public boolean apply(@Nullable
                     T input)

Specified by:

apply in interface com.google.common.base.Predicate<T>