xal.tools.data

Class KeyValueSorting

java.lang.Object

xal.tools.data.KeyValueSorting

public class KeyValueSorting
extends java.lang.Object

factory to support sorting using the key value adaptor

Field Summary

Fields

Modifier and Type	Field and Description
static int	ASCENDING indicates ascending order
static int	DESCENDING indicates ascending order

Constructor Summary

Constructors

Constructor and Description
KeyValueSorting()

Method Summary

Modifier and Type	Method and Description
static <RecordType> java.util.Comparator<RecordType>	comparatorForKeyPath(KeyValueAdaptor adaptor, java.lang.String keyPath, int order) Generate a comparator that compares records according to the method obtained by the key value adaptor The keyed values being compared are assumed to be comparable.
static <RecordType> java.util.Comparator<RecordType>	comparatorForKeyPath(java.lang.String keyPath, int order) Generate a comparator that compares records according to the method obtained by a key value adaptor generated internally.
static <RecordType> java.util.Comparator<RecordType>	compoundComparator(java.util.Comparator<RecordType>... comparators) Coalesce the specified comparators to generate a compound comparator whose sub comparators are evaluated in the specified order.

Methods inherited from class java.lang.Object

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

Field Detail

DESCENDING

public static final int DESCENDING

indicates ascending order

See Also:

Constant Field Values

ASCENDING

public static final int ASCENDING

indicates ascending order

See Also:

Constant Field Values

Constructor Detail

KeyValueSorting

public KeyValueSorting()

Method Detail

comparatorForKeyPath

public static <RecordType> java.util.Comparator<RecordType> comparatorForKeyPath(java.lang.String keyPath,
                                                                                 int order)

Generate a comparator that compares records according to the method obtained by a key value adaptor generated internally. The keyed values being compared are assumed to be comparable.

Parameters:

keyPath - indicates the method used for comparison

order - either ASCENDING or DESCENDING

Returns:

a comparator which compares objects according to the keyed parameter

comparatorForKeyPath

public static <RecordType> java.util.Comparator<RecordType> comparatorForKeyPath(KeyValueAdaptor adaptor,
                                                                                 java.lang.String keyPath,
                                                                                 int order)

Generate a comparator that compares records according to the method obtained by the key value adaptor The keyed values being compared are assumed to be comparable.

Parameters:

adaptor - key value adaptor used for getting the method associated with the key

keyPath - indicates the method used for comparison

order - either ASCENDING or DESCENDING

Returns:

a comparator which compares objects according to the keyed parameter

compoundComparator

@SafeVarargs
public static <RecordType> java.util.Comparator<RecordType> compoundComparator(java.util.Comparator<RecordType>... comparators)

Coalesce the specified comparators to generate a compound comparator whose sub comparators are evaluated in the specified order.

Parameters:

comparators - array of parameters to coalesce taken in order (sort first by the first comparator and last by the last comparator)

Returns:

the compound comparator