org.pentaho.reporting.engine.classic.core.filter
Class ResourceFileFilter

java.lang.Object
  org.pentaho.reporting.engine.classic.core.filter.ResourceFileFilter

All Implemented Interfaces:

Serializable, Cloneable, DataFilter, DataSource, DataTarget

public class ResourceFileFilter
extends Object
implements DataFilter

Lookup a key from a datasource using a ResourceBundle.

Filters a given datasource and uses the datasource value as key for a ResourceBundle.

Author:

Thomas Morgner

See Also:

Serialized Form

Constructor Summary

ResourceFileFilter()
Creates a new ResourceFileFilter.

Method Summary

Object	clone() Clones this DataSource.
DataSource	getDataSource() Returns the assigned DataSource for this Target.
String	getResourceIdentifier() Returns the name of the used resource bundle.
Object	getValue(ExpressionRuntime runtime, Element element) Returns the current value for the data source.
void	setDataSource(DataSource ds) Assigns a DataSource for this Target.
void	setResourceIdentifier(String resourceIdentifier) Defines the name of the used resource bundle.

Methods inherited from class java.lang.Object

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

Constructor Detail

ResourceFileFilter

public ResourceFileFilter()

Creates a new ResourceFileFilter.

Method Detail

getResourceIdentifier

public String getResourceIdentifier()

Returns the name of the used resource bundle.

Returns:

the name of the resourcebundle

See Also:

ResourceBundleFactory.getResourceBundle(String)

setResourceIdentifier

public void setResourceIdentifier(String resourceIdentifier)

Defines the name of the used resource bundle. If undefined, all calls to DataSource.getValue(ExpressionRuntime, Element) will result in null values.

Parameters:

resourceIdentifier - the resource bundle name

getValue

public Object getValue(ExpressionRuntime runtime,
                       Element element)

Returns the current value for the data source. The method will return null, if no datasource or no resource bundle is defined or if the datasource's value is null.

The value read from the dataSource is looked up in the given resourcebundle using the ResourceBundle.getObject() method. If the lookup fails, null is returned.

Specified by:

getValue in interface DataSource

Parameters:

runtime - the expression runtime that is used to evaluate formulas and expressions when computing the value of this filter.

element -

Returns:

the value or null, if the value could not be looked up.

clone

public Object clone()
             throws CloneNotSupportedException

Clones this DataSource.

Specified by:

clone in interface DataSource

Specified by:

clone in interface DataTarget

Overrides:

clone in class Object

Returns:

the clone.

Throws:

CloneNotSupportedException - this should never happen.

getDataSource

public DataSource getDataSource()

Returns the assigned DataSource for this Target.

Specified by:

getDataSource in interface DataTarget

Returns:

The datasource.

setDataSource

public void setDataSource(DataSource ds)

Assigns a DataSource for this Target.

Specified by:

setDataSource in interface DataTarget

Parameters:

ds - The data source.