Package org.springframework.data.gemfire.snapshot.filter

Class ComposableSnapshotFilter<K,V>

java.lang.Object

org.springframework.data.gemfire.snapshot.filter.ComposableSnapshotFilter<K,V>

All Implemented Interfaces:

Serializable, SnapshotFilter<K,V>

public class ComposableSnapshotFilter<K,V>
extends Object
implements SnapshotFilter<K,V>

The ComposableSnapshotFilter class is a GemFire SnapshotFilter implementation of the Composition design pattern allowing 2 or more SnapshotFilters to be combined by logical AND and OR operators acting as a single SnapshotFilter.

Since:

1.7.0

Author:

John Blum

See Also:

• SnapshotFilter
• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static enum	ComposableSnapshotFilter.Operator	Operator is an enumeration of logical operators (AND, OR) used to compose SnapshotFilters into a boolean expression.

Method Summary

Modifier and Type	Method	Description
boolean	accept(Map.Entry<K,V> entry)	Determines whether the following Map Entry is accepted by this composed SnapshotFilter implementation.
static <K, V> SnapshotFilter<K,V>	and(SnapshotFilter<K,V>... snapshotFilters)	Composes the array of SnapshotFilters into a logical boolean expression using the AND Operator.
protected static <K, V> SnapshotFilter<K,V>	compose(ComposableSnapshotFilter.Operator operator, SnapshotFilter<K,V>... snapshotFilters)	Composes the array of SnapshotFilters into a logical boolean expression using the specified Operator.
static <K, V> SnapshotFilter<K,V>	or(SnapshotFilter<K,V>... snapshotFilters)	Composes the array of SnapshotFilters into a logical boolean expression using the OR Operator.

Methods inherited from class java.lang.Object

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

Method Details

compose

protected static <K,
V> SnapshotFilter<K,V> compose(ComposableSnapshotFilter.Operator operator,
 SnapshotFilter<K,V>... snapshotFilters)

Composes the array of SnapshotFilters into a logical boolean expression using the specified Operator.

Type Parameters:

K - the class type of the SnapshotFilter key.

V - the class type of the SnapshotFilter value.

Parameters:

operator - the logical operator used to compose the SnapshotFilters.

snapshotFilters - the array of SnapshotFilters to compose into a logical boolean expression using the Operator.

Returns:

a SnapshotFilter implementation composed of the SnapshotFilters using the specified Operator.

See Also:

• ComposableSnapshotFilter.Operator
• SnapshotFilter

and

public static <K,
V> SnapshotFilter<K,V> and(SnapshotFilter<K,V>... snapshotFilters)

Composes the array of SnapshotFilters into a logical boolean expression using the AND Operator.

Type Parameters:

K - the class type of the SnapshotFilter key.

V - the class type of the SnapshotFilter value.

Parameters:

snapshotFilters - the array of SnapshotFilters to compose into a logical boolean expression using the AND Operator.

Returns:

a SnapshotFilter implementation composed of the SnapshotFilters using the AND Operator.

See Also:

• ComposableSnapshotFilter.Operator.AND
• SnapshotFilter

or

public static <K,
V> SnapshotFilter<K,V> or(SnapshotFilter<K,V>... snapshotFilters)

Composes the array of SnapshotFilters into a logical boolean expression using the OR Operator.

Type Parameters:

K - the class type of the SnapshotFilter key.

V - the class type of the SnapshotFilter value.

Parameters:

snapshotFilters - the array of SnapshotFilters to compose into a logical boolean expression using the OR Operator.

Returns:

a SnapshotFilter implementation composed of the SnapshotFilters using the OR Operator.

See Also:

• ComposableSnapshotFilter.Operator.OR
• SnapshotFilter

accept

public boolean accept(Map.Entry<K,V> entry)

Determines whether the following Map Entry is accepted by this composed SnapshotFilter implementation.

Specified by:

accept in interface SnapshotFilter<K,V>

Parameters:

entry - the Map.Entry to evaluate.

Returns:

a boolean value indicating whether this composed SnapshotFilter accepts the Map Entry.

See Also:

• ComposableSnapshotFilter.Operator
• SnapshotFilter.accept(Map.Entry)
• Map.Entry