com.ur.urcap.api.domain.program

Interface ProgramModel

public interface ProgramModel

Summary

This interface makes it possible to modify sub-trees of URCaps. The structure of trees is separated from the contents of the nodes. The TreeNode interface is concerned with the structure of trees whereas the ProgramNode interface deals with the concrete content of the nodes of the tree.

Getting started with program modification

A ProgramModel contains a:

• getProgramNodeFactory() - that makes it possible to create new program nodes (both built-in PolyScope nodes and URCap program nodes).
• getRootTreeNode(ProgramNodeContribution root)} - returns the sub-tree of a given URCap ProgramNodeContribution

The TreeNode interface supports insertion and removal of nodes. With it you can retrieve the list of children of particular nodes. Calling lockChildSequence on a tree node, locks the immediate children under the node. I.e. children can not be rearranged, deleted or have other nodes inserted into the child sequence by the end user.

Example code

 public class UpdateProgramExampleContribution implements ProgramNodeContribution {
      ProgramModel programModel;

      public UpdateProgramExampleContribution(URCapAPI urCapAPI) {
          this.programModel = urCapAPI.getProgramModel();
      }

      private void insertIntoProgramTree() {
          TreeNode treeNode = programModel.createRootTreeNode(this);
          try {
              treeNode.addChild(programModel.getProgramNodeFactory().createCommentNode());
          } catch (TreeStructureException e) {
              // Your handler code
          }
      }

      //...
      //... rest of the implementation and a call to insertIntoProgramTree()
      //...
 }
 

Method Summary

Modifier and Type	Method and Description
ProgramNodeFactory	getProgramNodeFactory() This method returns a ProgramNodeFactory to create program nodes.
TreeNode	getRootTreeNode(ProgramNodeContribution root) Gets the TreeNode root from ProgramNodeContribution.

Method Detail

getProgramNodeFactory

ProgramNodeFactory getProgramNodeFactory()

This method returns a ProgramNodeFactory to create program nodes.

Returns:

the factory to create program nodes.

getRootTreeNode

TreeNode getRootTreeNode(ProgramNodeContribution root)

Gets the TreeNode root from ProgramNodeContribution. From here, children can be added to form a sub-tree.

Parameters:

root - The URCap program node where a sub-tree is to be rooted.

Returns:

Returns a TreeNode root.