Example 7.1. Custom style data object

/**
 * A simple data object that holds the state information of
 * the custom style.
 */
public class CustomStyle implements INodeStyle {

  private IStroke stroke;
  private IFill fill;
  private double percentage;

  public IStroke getStroke() {
    return stroke;
  }
  public void setStroke(IStroke stroke) {
    this.stroke = stroke;
  }

  public IFill getFill() {
    return fill;
  }
  public void setFill(IFill fill) {
    this.fill = fill;
  }

  public double getPercentage() {
    return percentage;
  }
  public void setPercentage(double percentage) {
    this.percentage = percentage;
  }
}

Example 7.2. Custom style deserializer

// Simple deserializer implementation that reads the custom style
// and creates a corresponding CustomStyle data object that can be used to manipulate
// the style properties.
// 
// Because this deserializer extends AbstractDeserializer, we don't need
// to implement canHandle. The default implementation will return true, if
// the element name and namespace of an xml element match
// the values returned by getElementName and getXmlNamespaceURI.
//
// The framework already contains deserializers for fill and strokes instances.
// Therefore, we can just delegate the deserialization of the fill and stroke using 
// FlexIOTools.deserialize
public class CustomStyleDeserializer extends AbstractDeserializer {
  public Object deserializeElementContent(GraphMLParseContext context, Node xmlNode) {

    // Create a new instance of the data object that will keep the state
    // of the deserialized custom style
    CustomStyle style = new CustomStyle();

    // Deserialize the fill using 
    // FlexIOTools.deserialize, which will delegate the deserialization to 
    // an IDeserializer that can deserialize fills.
    Node fillNode = XmlSupport.getChildNode(xmlNode, Constants.Y_BRUSH, GraphMLConstants.YWORKS_EXT_NS_URI);
    IFill fill = (IFill) FlexIOTools.deserialize(context, fillNode);
    if (null != fill) {
      style.setFill(fill);
    }

    // Deserialize the stroke using 
    // FlexIOTools.deserialize, which will delegate the deserialization to 
    // an IDeserializer that can deserialize strokes
    Node strokeNode = XmlSupport.getChildNode(xmlNode, Constants.Y_PEN, GraphMLConstants.YWORKS_EXT_NS_URI);
    IStroke stroke = (IStroke) FlexIOTools.deserialize(context, strokeNode);
    if (null != stroke) {
      style.setStroke(stroke);
    }

    // Read the percentage attribute
    Node percentageNode = XmlSupport.getChildNode(xmlNode, "Percentage", GraphMLConstants.YWORKS_EXT_NS_URI);
    if (null != percentageNode) {
      String value = XmlSupport.getAttributeValue(percentageNode, "value");
      if (null != value) {
        style.setPercentage(Double.parseDouble(value));
      }
    }

    return style;
  }

  public String getElementName(GraphMLParseContext context) {
    return "CustomStyle";
  }

  public String getXmlNamespaceURI(GraphMLParseContext context) {
    return GraphMLConstants.YWORKS_EXT_NS_URI;
  }
}