The TreeSDMLink class

The class TreeSDMLink represents the links of the graph. Its definition is as shown in the following code example.

public class TreeSDMLink implements IlvSDMLink
{
...

The link implementation can therefore make use of all the predefined methods of the IlvSDMLink interface.

Data Stored

Each link has a reference to a parent node and a child node, which can be retrieved using the getFrom and getTo methods, see the following code example.

Keeping track of link data: parent and child

  private TreeSDMNode parent, child;

  public TreeSDMLink(TreeSDMNode parent, TreeSDMNode child)
  {
    this.parent = parent;
    this.child = child;
  }

  public IlvSDMNode getFrom()
  {
    return parent;
  }

  public IlvSDMNode getTo()
  {
    return child;
  }

Implementation of the IlvSDMNode interface

The IlvSDMLink interface inherits from the IlvSDMNode interface and so the same methods must be implemented as for a node.

The tag (type) of links is treelink. and this value can be retrieved using the getTag method, see the following code example.

public String getTag()
  {
    return "treelink";
  }

The remaining methods are mostly empty, since in this example links have no properties.

Current section

NonJavaBeans example: abstract model variant