| java.lang.Object
 org.springframework.util.comparator.CompoundComparator
| CompoundComparator | | public class CompoundComparator implements Comparator,Serializable(Code) | | A comparator that chains a sequence of one or more more Comparators.
A compound comparator calls each Comparator in sequence until a single
Comparator returns a non-zero result, or the comparators are exhausted and
zero is returned.
This facilitates in-memory sorting similar to multi-column sorting in SQL.
The order of any single Comparator in the list can also be reversed.
author:
Keith Donald
author:
Juergen Hoeller
since:
1.2.2 |
| Constructor Summary | |
| public | CompoundComparator()
Construct a CompoundComparator with initially no Comparators. | | public | CompoundComparator(Comparator[] comparators)
Construct a CompoundComparator from the Comparators in the provided array. |
| CompoundComparator | | public CompoundComparator()(Code) | | Construct a CompoundComparator with initially no Comparators. Clients
must add at least one Comparator before calling the compare method or an
IllegalStateException is thrown.
|
| CompoundComparator | | public CompoundComparator(Comparator[] comparators)(Code) | | Construct a CompoundComparator from the Comparators in the provided array.
All Comparators will default to ascending sort order,
unless they are InvertibleComparators.
Parameters:
comparators - the comparators to build into a compound comparator
See Also: InvertibleComparator |
| addComparator | | public void addComparator(Comparator comparator)(Code) | | Add a Comparator to the end of the chain.
The Comparator will default to ascending sort order,
unless it is a InvertibleComparator.
Parameters:
comparator - the Comparator to add to the end of the chain
See Also: InvertibleComparator |
| addComparator | | public void addComparator(Comparator comparator, boolean ascending)(Code) | | Add a Comparator to the end of the chain using the provided sort order.
Parameters:
comparator - the Comparator to add to the end of the chain
Parameters:
ascending - the sort order: ascending (true) or descending (false) |
| getComparatorCount | | public int getComparatorCount()(Code) | | Returns the number of aggregated comparators.
|
| hashCode | | public int hashCode()(Code) | | |
| invertOrder | | public void invertOrder()(Code) | | Invert the sort order of each sort definition contained by this compound
comparator.
|
| invertOrder | | public void invertOrder(int index)(Code) | | Invert the sort order of the sort definition at the specified index.
Parameters:
index - the index of the comparator to invert |
| setAscendingOrder | | public void setAscendingOrder(int index)(Code) | | Change the sort order at the given index to ascending.
Parameters:
index - the index of the comparator to change |
| setComparator | | public void setComparator(int index, Comparator comparator)(Code) | | Replace the Comparator at the given index.
The Comparator will default to ascending sort order,
unless it is a InvertibleComparator.
Parameters:
index - the index of the Comparator to replace
Parameters:
comparator - the Comparator to place at the given index
See Also: InvertibleComparator |
| setComparator | | public void setComparator(int index, Comparator comparator, boolean ascending)(Code) | | Replace the Comparator at the given index using the given sort order.
Parameters:
index - the index of the Comparator to replace
Parameters:
comparator - the Comparator to place at the given index
Parameters:
ascending - the sort order: ascending (true) or descending (false) |
| setDescendingOrder | | public void setDescendingOrder(int index)(Code) | | Change the sort order at the given index to descending sort.
Parameters:
index - the index of the comparator to change |
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