y.util
Class DataProviderAdapter

java.lang.Object
  y.util.DataProviderAdapter

All Implemented Interfaces:

DataProvider

Direct Known Subclasses:

AlignmentDrawer.BottomAlignmentDataProvider, AlignmentDrawer.LeftAlignmentDataProvider, AlignmentDrawer.RightAlignmentDataProvider, AlignmentDrawer.TopAlignmentDataProvider, GroupLayoutConfigurator.MinNodeSizeDataProvider, LeftRightPlacer.LeftRightDataProvider, NodeRealizerIntersectionCalculator

public abstract class DataProviderAdapter
extends java.lang.Object
implements DataProvider

An abstract adapter class for providing data. The data provision methods in this class throw a UnsupportedOperationException and defined(Object) always returns false.

This class exists as a convenience for creating data provider objects.

Extend this class to provide either typed or untyped data for a certain lookup domain.

Constructor Summary

DataProviderAdapter()

Method Summary

boolean	defined(java.lang.Object dataHolder) Returns false for all data holders.
java.lang.Object	get(java.lang.Object dataHolder) Subclasses may override this method to provide access to object values.
boolean	getBool(java.lang.Object dataHolder) Subclasses may override this method to provide access to boolean values.
double	getDouble(java.lang.Object dataHolder) Subclasses may override this method to provide access to double values.
int	getInt(java.lang.Object dataHolder) Subclasses may override this method to provide access to integer values.

Methods inherited from class java.lang.Object

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

Constructor Detail

DataProviderAdapter

public DataProviderAdapter()

Method Detail

get

public java.lang.Object get(java.lang.Object dataHolder)

Subclasses may override this method to provide access to object values.

Specified by:

get in interface DataProvider

Throws:

java.lang.UnsupportedOperationException - unless overwritten.

getInt

public int getInt(java.lang.Object dataHolder)

Subclasses may override this method to provide access to integer values.

Specified by:

getInt in interface DataProvider

Throws:

java.lang.UnsupportedOperationException - unless overwritten.

getDouble

public double getDouble(java.lang.Object dataHolder)

Subclasses may override this method to provide access to double values.

Specified by:

getDouble in interface DataProvider

Throws:

java.lang.UnsupportedOperationException - unless overwritten.

getBool

public boolean getBool(java.lang.Object dataHolder)

Subclasses may override this method to provide access to boolean values.

Specified by:

getBool in interface DataProvider

Throws:

java.lang.UnsupportedOperationException - unless overwritten.

defined

public boolean defined(java.lang.Object dataHolder)

Returns false for all data holders. Subclasses should override this method to make clear for which data holders there is a value accessible via this data provider.

Returns:

false.