y.io.graphml.layout
Class NodeLayoutInputHandler

java.lang.Object
  y.io.graphml.input.AbstractInputHandler
      y.io.graphml.layout.NodeLayoutInputHandler

All Implemented Interfaces:

InputHandler

public class NodeLayoutInputHandler
extends AbstractInputHandler

Input handler for node layout information in GraphML.

Constructor Summary

NodeLayoutInputHandler()
Initializes a new NodeLayoutInputHandler instance.

Method Summary

boolean	acceptKey(org.w3c.dom.Element keyDefinition) Accepts keys with attribute yfiles.type="nodegraphics".
void	applyDefault(GraphMLParseContext context) Does nothing.
protected java.lang.Object	parseDataCore(GraphMLParseContext context, org.w3c.dom.Node node) Calls context.deserialize(context, n, NodeLayout.class) for the first child element n of the given XML node.
protected void	setValue(GraphMLParseContext context, java.lang.Object key, java.lang.Object data) Does nothing.

Methods inherited from class y.io.graphml.input.AbstractInputHandler

getDefaultValue, getPrecedence, getValidScopes, initializeFromKeyDefinition, isDefaultExists, isParseDefaultValue, parseData, setDefaultExists, setDefaultValue, setParseDefaultValue, setPrecedence, setValidScopes

Methods inherited from class java.lang.Object

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

Constructor Detail

NodeLayoutInputHandler

public NodeLayoutInputHandler()

Initializes a new NodeLayoutInputHandler instance.

Method Detail

acceptKey

public boolean acceptKey(org.w3c.dom.Element keyDefinition)

Accepts keys with attribute yfiles.type="nodegraphics".

Parameters:

keyDefinition - the XML data key element to check.

Returns:

true if the specified element has a yfiles.type="nodegraphics" attribute; false otherwise.

parseDataCore

protected java.lang.Object parseDataCore(GraphMLParseContext context,
                                         org.w3c.dom.Node node)
                                  throws GraphMLParseException

Calls context.deserialize(context, n, NodeLayout.class) for the first child element n of the given XML node.

Specified by:

parseDataCore in class AbstractInputHandler

Parameters:

context - the current parse context.

node - the XML node that contains the data. This is either the GraphML data element or the default element.

Returns:

the deserialized NodeLayout instance or null if the given XML node has no child elements.

Throws:

GraphMLParseException - if a problem occurs during deserialization.

setValue

protected void setValue(GraphMLParseContext context,
                        java.lang.Object key,
                        java.lang.Object data)

Does nothing. The actual layout information is read in a DeserializationHandler dedicated to NodeLayout instances.

Specified by:

setValue in class AbstractInputHandler

Parameters:

context - The context.

key - The key.

data - The data.

applyDefault

public void applyDefault(GraphMLParseContext context)

Does nothing.

Specified by:

applyDefault in interface InputHandler

Overrides:

applyDefault in class AbstractInputHandler

Parameters:

context - the current parse context.