com.sdm.quasar.client.core.data.plugin
Interface NestedValueHandler

public interface NestedValueHandler

The interface a ValueHandler calls in the value handler stack of a node to pass requests on to the next value handler.

This is a callback interface passed to a value handler when a value accessed (either get or set) to give the value handler access to the next value handler in the stack of the specific node. This chain is organized by the com.sdm.quasar.client.core.data.internal.impl.NodeController.

Version:

1.0

Author:

Thomas Wolf, sd&m AG, Bernd Olleck, sd&m AG

Method Summary

boolean	canModifyValue(Context context)
java.util.Set	getIndexSet(Context context)
java.lang.Object	getValue(Context context) Returns the (indexed) value of the node
boolean	hasValue(Context context)
void	setValue(Context context, java.lang.Object value) Sets the (indexed) value

Method Detail

hasValue

public boolean hasValue(Context context)

Parameters:

context - the context to resolve the indices

Returns:

true iff the node has a value

See Also:

ValueHandler.hasValue(NodeController, Context, NestedValueHandler)

getValue

public java.lang.Object getValue(Context context)

Returns the (indexed) value of the node

Parameters:

context - the context to resolve the indices

Returns:

the indexed value

See Also:

ValueHandler.getValue(NodeController, Context, NestedValueHandler)

canModifyValue

public boolean canModifyValue(Context context)

Parameters:

context - the context to resolve the indices

Returns:

true iff the value can be modified

See Also:

ValueHandler.canModifyValue(NodeController, Context, NestedValueHandler)

setValue

public void setValue(Context context,
                     java.lang.Object value)

Sets the (indexed) value

Parameters:

context - the context to resolve the indices

value - the new value

See Also:

ValueHandler.setValue(NodeController, Context, Object, NestedValueHandler)

getIndexSet

public java.util.Set getIndexSet(Context context)

Parameters:

context - the context to resolve the indices

Returns:

A Set of the index values for the node or null.

See Also:

ValueHandler.getIndexSet(NodeController, Context, NestedValueHandler)