MyNodePortLocationModelParameterExtension.java

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 ** This demo file is part of yFiles for JavaFX 3.6.
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package input.customportmodel;

import com.yworks.yfiles.graph.ILookup;
import com.yworks.yfiles.graphml.DefaultValue;
import com.yworks.yfiles.graphml.MarkupExtension;

/**
 * Handles reading and writing port location parameters created by
 * {@link MyNodePortLocationModel} from and to GraphML.
 * <p>
 * A markup extension is necessary in this case because the aforementioned
 * parameter implementation is immutable and does not expose public API for
 * accessing its internal state. As a result, the generic, reflection-based
 * (de-)serialization support built into yFiles' GraphML framework cannot handle
 * these parameters.
 * </p>
 * <p>
 * This helper class needs to be public in order to be accessible by GraphML's reflection code
 * </p>
 */
public class MyNodePortLocationModelParameterExtension extends MarkupExtension {
  private MyNodePortLocationModel model;
  private PortLocation location = PortLocation.CENTER;

  public MyNodePortLocationModelParameterExtension() {
  }

  public MyNodePortLocationModelParameterExtension(MyNodePortLocationModel model, PortLocation location) {
    this.model = model;
    this.location = location;
  }

  @DefaultValue(valueType = DefaultValue.ValueType.NULL)
  public MyNodePortLocationModel getModel() {
    return model;
  }

  @DefaultValue(valueType = DefaultValue.ValueType.NULL)
  public void setModel(MyNodePortLocationModel value) {
    model = value;
  }

  @DefaultValue(valueType = DefaultValue.ValueType.ENUM_TYPE, classValue = PortLocation.class, stringValue = "CENTER")
  public PortLocation getLocation() {
    return location;
  }

  @DefaultValue(valueType = DefaultValue.ValueType.ENUM_TYPE, classValue = PortLocation.class, stringValue = "CENTER")
  public void setLocation(PortLocation value) {
    location = value;
  }

  @Override
  public Object provideValue(ILookup lookup) {
    return (model != null ? model : new MyNodePortLocationModel()).createParameter(location);
  }
}