org.jfree.report.structure

Class Group

java.lang.Object

org.jfree.report.structure.Node

org.jfree.report.structure.Element

org.jfree.report.structure.Section

org.jfree.report.structure.Group

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

public class Group
extends Section

A report group. A group is a repeated section which is bound to an expression.

Default Behaviour

Whether a new group should be started is evaluated by the group's expression. If that expression returns Boolean.TRUE, a new group instance is started. (That expression answers the Questions: 'Does this group instance end here?').

If the group expression is invalid or there is no group expression at all, a group will consume all rows until the datasource is no longer advanceable.

Author:

David Gilbert, Thomas Morgner

See Also:

Serialized Form

Field Summary

Fields inherited from class org.jfree.report.structure.Element

ID_ATTRIBUTE, NAME_ATTRIBUTE, NAMESPACE_ATTRIBUTE, TYPE_ATTRIBUTE, VIRTUAL_ATTRIBUTE

Constructor Summary

Constructors

Constructor and Description
Group() Constructs a group with no fields, and an empty header and footer.

Method Summary

Modifier and Type	Method and Description
java.lang.Object	clone()
Group	getGroup()
Expression	getGroupingExpression()
void	setGroupingExpression(Expression groupingExpression)
java.lang.String	toString() Returns a string representation of the group (useful for debugging).

Methods inherited from class org.jfree.report.structure.Section

addNode, addNode, addNodes, addOperationAfter, addOperationBefore, findFirstChild, getElementByName, getNode, getNodeArray, getNodeCount, getNodes, getOperationAfter, getOperationBefore, isRepeat, removeNode, setOperationAfter, setOperationBefore, setRepeat

Methods inherited from class org.jfree.report.structure.Element

addExpression, getAttribute, getAttribute, getAttributeExpression, getAttributeExpression, getAttributeExpressionMap, getAttributeExpressions, getAttributeMap, getDisplayCondition, getExpressions, getId, getLocale, getLocaleFromAttributes, getName, getNamespace, getStyle, getStyleExpression, getStyleExpressions, getType, getVisibility, isEnabled, isVirtual, setAttribute, setAttribute, setAttributeExpression, setAttributeExpression, setDisplayCondition, setEnabled, setExpressions, setId, setName, setNamespace, setStyleExpression, setType, setVirtual, setVisibility

Methods inherited from class org.jfree.report.structure.Node

getParent, getReport, getRootReport, setParent, updateParent

Methods inherited from class java.lang.Object

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

Constructor Detail

Group

public Group()

Constructs a group with no fields, and an empty header and footer.

Method Detail

toString

public java.lang.String toString()

Returns a string representation of the group (useful for debugging).

Overrides:

toString in class Section

Returns:

A string.

getGroupingExpression

public Expression getGroupingExpression()

setGroupingExpression

public void setGroupingExpression(Expression groupingExpression)

getGroup

public Group getGroup()

Overrides:

getGroup in class Node

clone

public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException

Overrides:

clone in class Section

Throws:

java.lang.CloneNotSupportedException