net.sf.jasperreports.crosstabs.fill.calculation
Class BucketDefinition

java.lang.Object
  net.sf.jasperreports.crosstabs.fill.calculation.BucketDefinition

public class BucketDefinition
extends Object

Bucket definition.

Version:

$Id: BucketDefinition.java 5180 2012-03-29 13:23:12Z teodord $

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

Nested Class Summary

class

BucketDefinition.Bucket Bucket value class.

Field Summary

protected Comparator<Object>	bucketValueComparator
protected JRExpression	orderByExpression
protected Comparator<Object>	orderValueComparator
protected BucketDefinition.Bucket	VALUE_NULL The null bucket.
protected BucketDefinition.Bucket	VALUE_TOTAL The total value for this bucket.
protected static byte	VALUE_TYPE_NULL Value type used for null bucket values.
protected static byte	VALUE_TYPE_TOTAL Value type used for total buckets.
protected static byte	VALUE_TYPE_VALUE Value type used for non-null values.

Constructor Summary

BucketDefinition(Class<?> valueClass, JRExpression orderByExpression, Comparator<Object> comparator, SortOrderEnum order, CrosstabTotalPositionEnum totalPosition)
Creates a bucket.

Method Summary

int	compareOrderValues(Object v1, Object v2)
boolean	computeTotal() Whether this bucket needs total calculation.
BucketDefinition.Bucket	create(Object value) Creates a BucketValue object for a given value.
protected static Comparator<Object>	createOrderComparator(Comparator<Object> comparator, SortOrderEnum order)
JRExpression	getOrderByExpression()
CrosstabTotalPositionEnum	getTotalPosition() Returns the total bucket position.
boolean	hasOrderValues()
void	setComputeTotal() Instructs that the bucket will need total bucket calculation.

Methods inherited from class java.lang.Object

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

Field Detail

VALUE_TYPE_VALUE

protected static final byte VALUE_TYPE_VALUE

Value type used for non-null values.

See Also:

Constant Field Values

VALUE_TYPE_NULL

protected static final byte VALUE_TYPE_NULL

Value type used for null bucket values.

See Also:

Constant Field Values

VALUE_TYPE_TOTAL

protected static final byte VALUE_TYPE_TOTAL

Value type used for total buckets.

See Also:

Constant Field Values

VALUE_TOTAL

protected final BucketDefinition.Bucket VALUE_TOTAL

The total value for this bucket.

VALUE_NULL

protected final BucketDefinition.Bucket VALUE_NULL

The null bucket.

bucketValueComparator

protected final Comparator<Object> bucketValueComparator

orderByExpression

protected final JRExpression orderByExpression

orderValueComparator

protected final Comparator<Object> orderValueComparator

Constructor Detail

BucketDefinition

public BucketDefinition(Class<?> valueClass,
                        JRExpression orderByExpression,
                        Comparator<Object> comparator,
                        SortOrderEnum order,
                        CrosstabTotalPositionEnum totalPosition)
                 throws JRException

Creates a bucket.

Parameters:

valueClass - the class of the bucket values

orderByExpression - expression that provides order by values

comparator - the comparator to use for bucket sorting

order - the order type, SortOrderEnum.ASCENDING or SortOrderEnum.DESCENDING descending

totalPosition - the position of the total bucket

Throws:

JRException

Method Detail

createOrderComparator

protected static Comparator<Object> createOrderComparator(Comparator<Object> comparator,
                                                          SortOrderEnum order)

computeTotal

public boolean computeTotal()

Whether this bucket needs total calculation.

Returns:

this bucket needs total calculation

setComputeTotal

public void setComputeTotal()

Instructs that the bucket will need total bucket calculation.

See Also:

computeTotal()

getTotalPosition

public CrosstabTotalPositionEnum getTotalPosition()

Returns the total bucket position.

Returns:

the total bucket position

getOrderByExpression

public JRExpression getOrderByExpression()

hasOrderValues

public boolean hasOrderValues()

compareOrderValues

public int compareOrderValues(Object v1,
                              Object v2)

create

public BucketDefinition.Bucket create(Object value)

Creates a BucketValue object for a given value.

Parameters:

value - the value

Returns:

the corresponding BucketValue object