de.mguennewig.pobjects.memdb
Class RecordComparator

java.lang.Object
  de.mguennewig.pobjects.memdb.RecordComparator

All Implemented Interfaces:

java.util.Comparator<Record>

public class RecordComparator
extends java.lang.Object
implements java.util.Comparator<Record>

A comparator for Records.

Author:

Michael Günnewig

Constructor Summary

RecordComparator(Column column)
Creates a new Record comparator.

RecordComparator(Column[] columns)
Creates a new Record comparator.

RecordComparator(Column[] columns, java.lang.String applyFunction)
Creates a new Record comparator.

Method Summary

int	compare(Record r1, Record r2)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals

Constructor Detail

RecordComparator

public RecordComparator(Column column)

Creates a new Record comparator.

Parameters:

column - specifies the column to sort over

RecordComparator

public RecordComparator(Column[] columns)

Creates a new Record comparator.

Parameters:

columns - a designator to sort over

See Also:

Member.Member(int,Column[])

RecordComparator

public RecordComparator(Column[] columns,
                        java.lang.String applyFunction)

Creates a new Record comparator.

Parameters:

columns - a designator to sort over

applyFunction - name of a function, which should be applied before the comparison to the value from the column

See Also:

Member.Member(int,Column[]), FctCall

Method Detail

compare

public int compare(Record r1,
                   Record r2)

Specified by:

compare in interface java.util.Comparator<Record>

Throws:

java.lang.UnsupportedOperationException - if applyFunction is not supported.

See Also:

evalFunction(java.lang.Object)