org.apache.tapestry.contrib.table.model.simple
Class ColumnComparator
java.lang.Object
org.apache.tapestry.contrib.table.model.simple.ColumnComparator
- All Implemented Interfaces:
- Comparator
public class ColumnComparator
- extends Object
- implements Comparator
In order to provide more generic behaviour, ITableColumn
has no "column value" concept. The comparator it returns
compares two table rows, rather than values specific to the column.
SimpleTableColumn introduces the concept of "column value" and
allows one to extract that "column value" from the row using
the getColumnValue() method. In practice comparisons are also typically
done between these values rather than the full row objects.
This comparator extracts the column values from the rows passed
and uses the provided comparator to compare the values.
It therefore allows a comparator designed for comparing column values to be
quickly wrapped and used as a comparator comparing rows, which is what
ITableColumn is expected to return.
Example:
objColumn.setComparator(new ColumnComparator(objColumn, objBeanComparator));
- Version:
- $Id: ColumnComparator.java 243791 2004-02-19 17:38:13Z hlship $
- Author:
- mindbridge
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
ColumnComparator
public ColumnComparator(SimpleTableColumn objColumn,
Comparator objComparator)
compare
public int compare(Object objRow1,
Object objRow2)
- Specified by:
compare
in interface Comparator
- See Also:
Comparator.compare(Object, Object)