net.infordata.ifw2.web.grds

Class PojoColumnComparator<T>

java.lang.Object

net.infordata.ifw2.web.grds.PojoColumnComparator<T>

Type Parameters:

T -

All Implemented Interfaces:

java.io.Serializable, java.util.Comparator<T>

public class PojoColumnComparator<T>
extends java.lang.Object
implements java.util.Comparator<T>, java.io.Serializable

A Comparator which uses IPojoGridModel.getValue(Object, int) to access column values of an IPojoGridModel.
If provided, a delegated comparator is used to compare columns values otherwise values must implement the Comparable interface.

Author:

valentino.proietti

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
PojoColumnComparator(IPojoGridModel<T> model, boolean ascending, int columnIdx)
PojoColumnComparator(IPojoGridModel<T> model, java.util.Comparator<?> delegated, boolean ascending, int columnIdx)

Method Summary

Methods

Modifier and Type	Method and Description
static <T> int	binarySearch(java.util.List<T> list, IPojoGridModel<T> model, int columnIdx, java.lang.Object value, boolean ascending, java.util.Comparator comparator)
int	compare(T o1, T o2)
static <T> int	containsSearch(java.util.List<T> list, IPojoGridModel<T> model, int columnIdx, java.lang.String value, boolean forward, int startFrom)
static java.util.Comparator<?>	getComparatorByType(java.lang.Class<?> dataType) The returned comparator can change for the same data type since it can depends on the current locale (see LocaleContext.getLocale().
static java.util.Comparator<?>	getComparatorForColumn(IColumn column)
static <T> int	sortAndBinarySearch(java.util.List<T> list, IPojoGridModel<T> model, int columnIdx, java.lang.Object value, boolean ascending, java.util.Comparator valueComparator) Temporarily sorts the list and searches for the given values.

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

PojoColumnComparator

public PojoColumnComparator(IPojoGridModel<T> model,
                    boolean ascending,
                    int columnIdx)

PojoColumnComparator

public PojoColumnComparator(IPojoGridModel<T> model,
                    java.util.Comparator<?> delegated,
                    boolean ascending,
                    int columnIdx)

Method Detail

compare

public int compare(T o1,
          T o2)

Specified by:

compare in interface java.util.Comparator<T>

binarySearch

public static <T> int binarySearch(java.util.List<T> list,
                   IPojoGridModel<T> model,
                   int columnIdx,
                   java.lang.Object value,
                   boolean ascending,
                   java.util.Comparator comparator)

Parameters:

list -

model -

columnIdx -

value -

ascending -

comparator - - if not specified then Comparable.compareTo(Object) is used.

Returns:

see Collections.binarySearch(List, Object, Comparator)

sortAndBinarySearch

public static <T> int sortAndBinarySearch(java.util.List<T> list,
                          IPojoGridModel<T> model,
                          int columnIdx,
                          java.lang.Object value,
                          boolean ascending,
                          java.util.Comparator valueComparator)

Temporarily sorts the list and searches for the given values.

Type Parameters:

T -

Parameters:

list -

value -

valueComparator -

Returns:

Same as Collections.binarySearch(List, Object) but with the original indexes (ie. before sorting).

containsSearch

public static <T> int containsSearch(java.util.List<T> list,
                     IPojoGridModel<T> model,
                     int columnIdx,
                     java.lang.String value,
                     boolean forward,
                     int startFrom)

getComparatorForColumn

public static java.util.Comparator<?> getComparatorForColumn(IColumn column)

getComparatorByType

public static java.util.Comparator<?> getComparatorByType(java.lang.Class<?> dataType)

The returned comparator can change for the same data type since it can depends on the current locale (see LocaleContext.getLocale().