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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 .JRDataset

All known Subclasses:   net.sf.jasperreports.engine.base .JRBaseDataset,  net.sf.jasperreports.engine.fill .JRFillDataset,
JRDataset
public interface JRDataset extends JRPropertiesHolder(Code)
Interface representing a data set that can be used in a report.
A data set consists of parameters, fields, variables, groups and an optional query. When a data set gets instantiated, parameter values and a data source is passed to it.
A report has one main data set and multiple sub data sets that can be instantiated by charts and crosstabs.
author:
   Lucian Chirita (lucianc@users.sourceforge.net)
version:
   $Id: JRDataset.java 1669 2007-03-26 14:50:07Z lucianc $
See Also:   net.sf.jasperreports.engine.JRDatasetRun
See Also:   net.sf.jasperreports.engine.JRReport.getMainDataset
See Also:   net.sf.jasperreports.engine.JRReport.getDatasets

Field Summary
final public static byte WHEN_RESOURCE_MISSING_TYPE_EMPTY
     Return empty string when a resource is missing.
final public static byte WHEN_RESOURCE_MISSING_TYPE_ERROR
     Throw an exception when a resource is missing.
final public static byte WHEN_RESOURCE_MISSING_TYPE_KEY
     Return the key when a resource is missing.
final public static byte WHEN_RESOURCE_MISSING_TYPE_NULL
     Return NULL when a resource is missing.

Method Summary
public JRField[] getFields()
     Returns the dataset's fields.
public JRExpression getFilterExpression()
     Returns the dataset filter expression.
This expression is used to filter the rows of the JRDataSource data source that this dataset will iterate on.

This expression (if not null) is evaluated immediately after a new row is JRDataSource.next produced by the data source. The evaluation is performed using field and variable values corresponding to the new row.
public JRGroup[] getGroups()
     Returns the dataset's groups.
public String getName()
     Returns the dataset name.
public JRParameter[] getParameters()
     Returns the dataset's parameters.
public JRQuery getQuery()
     Returns the query of the dataset.
public String getResourceBundle()
     Returns the resource bundle base name.
public String getScriptletClass()
     The name of the scriptlet class to be used when iterating this dataset.
public JRSortField[] getSortFields()
     Returns the dataset's sort fields.
public JRVariable[] getVariables()
     Returns the dataset's variables.
public byte getWhenResourceMissingType()
     Returns the resource missing handling type.
public boolean isMainDataset()
     Decides whether this dataset is the main report dataset or a sub dataset.
public void setWhenResourceMissingType(byte whenResourceMissingType)
     Sets the resource missing handling type.

Field Detail
WHEN_RESOURCE_MISSING_TYPE_EMPTY
final public static byte WHEN_RESOURCE_MISSING_TYPE_EMPTY(Code)
Return empty string when a resource is missing.

WHEN_RESOURCE_MISSING_TYPE_ERROR
final public static byte WHEN_RESOURCE_MISSING_TYPE_ERROR(Code)
Throw an exception when a resource is missing.

WHEN_RESOURCE_MISSING_TYPE_KEY
final public static byte WHEN_RESOURCE_MISSING_TYPE_KEY(Code)
Return the key when a resource is missing.

WHEN_RESOURCE_MISSING_TYPE_NULL
final public static byte WHEN_RESOURCE_MISSING_TYPE_NULL(Code)
Return NULL when a resource is missing.

Method Detail
getFields
public JRField[] getFields()(Code)
Returns the dataset's fields. the dataset's fields

getFilterExpression
public JRExpression getFilterExpression()(Code)
Returns the dataset filter expression.
This expression is used to filter the rows of the JRDataSource data source that this dataset will iterate on.

This expression (if not null) is evaluated immediately after a new row is JRDataSource.next produced by the data source. The evaluation is performed using field and variable values corresponding to the new row. When the result of the evaluation is Boolean.TRUE the row gets processed by the report filling engine. When the result is null or Boolean.FALSE, the current row will be skipped and the datasource will be asked for the next row.
the dataset filter expression

getGroups
public JRGroup[] getGroups()(Code)
Returns the dataset's groups. the dataset's groups

getName
public String getName()(Code)
Returns the dataset name. the name of the dataset

getParameters
public JRParameter[] getParameters()(Code)
Returns the dataset's parameters. the dataset's parameters

getQuery
public JRQuery getQuery()(Code)
Returns the query of the dataset.
The query is used by passing a connection is passed to the dataset when instantiating. the query of the dataset

getResourceBundle
public String getResourceBundle()(Code)
Returns the resource bundle base name.
The resource bundle is used when evaluating expressions. the resource bundle base name

getScriptletClass
public String getScriptletClass()(Code)
The name of the scriptlet class to be used when iterating this dataset. the scriplet class name

getSortFields
public JRSortField[] getSortFields()(Code)
Returns the dataset's sort fields. the dataset's sort fields

getVariables
public JRVariable[] getVariables()(Code)
Returns the dataset's variables. the dataset's variables

getWhenResourceMissingType
public byte getWhenResourceMissingType()(Code)
Returns the resource missing handling type. the resource missing handling type

isMainDataset
public boolean isMainDataset()(Code)
Decides whether this dataset is the main report dataset or a sub dataset. true iff this dataset is the main report dataset

setWhenResourceMissingType
public void setWhenResourceMissingType(byte whenResourceMissingType)(Code)
Sets the resource missing handling type.
Parameters:
  whenResourceMissingType - the resource missing handling type

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