com.indexdata.torus2.query

Class RecordComparator

java.lang.Object

com.indexdata.torus2.query.RecordComparator

All Implemented Interfaces:

Comparator<Record>

public class RecordComparator
extends Object
implements Comparator<Record>

Comparator, based on criteria from provided CQLSortNode. Compares XML documents and is used for sorting XML documents in ascending or descending order by given Elements in the documents. Comparison is based on the text content of the Elements If the field to sort by is not found in one of the documents under comparison, the comparison will be done using the empty string. If there are multiple elements with the same name, the first occurrence will be used for comparison. The comparator supports multiple sort fields but only the modifiers sort order (default ascending) and locale (default is the systems default). Sorting will be character based (numeric sorting not supported).

Author:

Niels Erik

Constructor Summary

Constructors

Constructor and Description
RecordComparator(org.z3950.zing.cql.CQLSortNode cqlSortNode, String... layerNames)

Method Summary

Modifier and Type	Method and Description
int	compare(Record rec1, Record rec2) Will compare two documents based on alphabetical comparison of the content of the specified fields using the given sort order and locale if any.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

RecordComparator

public RecordComparator(org.z3950.zing.cql.CQLSortNode cqlSortNode,
                        String... layerNames)

Method Detail

compare

public int compare(Record rec1,
                   Record rec2)

Will compare two documents based on alphabetical comparison of the content of the specified fields using the given sort order and locale if any.

Specified by:

compare in interface Comparator<Record>