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Java Source Code / Java Documentation » Report » jasperreports 2.0.1 » net.sf.jasperreports.engine

Source Cross Reference

Class Diagram

Java Document (Java Doc)

net.sf.jasperreports.engine .JRExpression

All known Subclasses:   net.sf.jasperreports.engine.base .JRBaseExpression,
JRExpression
public interface JRExpression (Code)

author:
   Teodor Danciu (teodord@users.sourceforge.net)
version:
   $Id: JRExpression.java 1229 2006-04-19 10:27:35Z teodord $

Field Summary
final public static byte EVALUATION_DEFAULT

final public static byte EVALUATION_ESTIMATED

final public static byte EVALUATION_OLD

final public static byte EVALUATION_TIME_AUTO
     Evaluation time indicating that each variable participating in the expression should be evaluated at a time decided by the engine.
Variables will be evaluated at a time corresponding to their reset type. Fields are evaluated "now", i.e.
final public static byte EVALUATION_TIME_BAND
     The element will be evaluated at band end.
final public static byte EVALUATION_TIME_COLUMN
     A constant specifying that an expression should be evaluated after each column is filled.
final public static byte EVALUATION_TIME_GROUP
     A constant specifying that an expression should be evaluated after each group break.
final public static byte EVALUATION_TIME_NOW
     A constant specifying that an expression should be evaluated at the exact moment in the filling process when it is encountered.
final public static byte EVALUATION_TIME_PAGE
     A constant specifying that an expression should be evaluated after each page is filled.
final public static byte EVALUATION_TIME_REPORT
     A constant specifying that an expression should be evaluated at the end of the filling process.
final public static Integer NOT_USED_ID
     Dummy ID that is assigned to expression that are not used (and not collected).

Method Summary
public JRExpressionChunk[] getChunks()

public int getId()

public String getText()

public Class getValueClass()
     Returns the expression return value class.
public String getValueClassName()
     Returns the expression return value class.

Field Detail
EVALUATION_DEFAULT
final public static byte EVALUATION_DEFAULT(Code)

EVALUATION_ESTIMATED
final public static byte EVALUATION_ESTIMATED(Code)

EVALUATION_OLD
final public static byte EVALUATION_OLD(Code)

EVALUATION_TIME_AUTO
final public static byte EVALUATION_TIME_AUTO(Code)
Evaluation time indicating that each variable participating in the expression should be evaluated at a time decided by the engine.
Variables will be evaluated at a time corresponding to their reset type. Fields are evaluated "now", i.e. at the time the band the element lies on gets filled.
This evaluation type should be used when report elements having expressions that combine values evaluated at different times are required (e.g. percentage out of a total).
NB: avoid using this evaluation type when other types suffice as it can lead to performance loss.

EVALUATION_TIME_BAND
final public static byte EVALUATION_TIME_BAND(Code)
The element will be evaluated at band end.

EVALUATION_TIME_COLUMN
final public static byte EVALUATION_TIME_COLUMN(Code)
A constant specifying that an expression should be evaluated after each column is filled.

EVALUATION_TIME_GROUP
final public static byte EVALUATION_TIME_GROUP(Code)
A constant specifying that an expression should be evaluated after each group break.

EVALUATION_TIME_NOW
final public static byte EVALUATION_TIME_NOW(Code)
A constant specifying that an expression should be evaluated at the exact moment in the filling process when it is encountered.

EVALUATION_TIME_PAGE
final public static byte EVALUATION_TIME_PAGE(Code)
A constant specifying that an expression should be evaluated after each page is filled.

EVALUATION_TIME_REPORT
final public static byte EVALUATION_TIME_REPORT(Code)
A constant specifying that an expression should be evaluated at the end of the filling process.

NOT_USED_ID
final public static Integer NOT_USED_ID(Code)
Dummy ID that is assigned to expression that are not used (and not collected).

Method Detail
getChunks
public JRExpressionChunk[] getChunks()(Code)

getId
public int getId()(Code)

getText
public String getText()(Code)

getValueClass
public Class getValueClass()(Code)
Returns the expression return value class.

getValueClassName
public String getValueClassName()(Code)
Returns the expression return value class.

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