weka.gui.graphvisualizer

## Class DotParser

- java.lang.Object
- - weka.gui.graphvisualizer.DotParser

- All Implemented Interfaces:
    GraphConstants

      public class DotParser
      extends java.lang.Object
      implements GraphConstants

  This class parses input in DOT format, and builds the datastructures that are passed to it. It is NOT 100% compatible with the DOT format. The GraphNode and GraphEdge classes do not have any provision for dealing with different colours or shapes of nodes, there can however, be a different label and ID for a node. It also does not do anything for labels for edges. However, this class won't crash or throw an exception if it encounters any of the above attributes of an edge or a node. This class however, won't be able to deal with things like subgraphs and grouping of nodes.
  Version:
    $Revision: 10222 $ - 23 Apr 2003 - Initial version (Ashraf M. Kibriya)
  Author:
    Ashraf M. Kibriya (amk14@cs.waikato.ac.nz)

- - ### Field Summary

    - ### Fields inherited from interface weka.gui.graphvisualizer.GraphConstants

      `DIRECTED, DOUBLE, NORMAL, PLURAL_DUMMY, REVERSED, SINGULAR_DUMMY`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `DotParser(java.io.Reader input, java.util.ArrayList<GraphNode> nodes, java.util.ArrayList<GraphEdge> edges)` Dot parser Constructor

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `java.lang.String` | `parse()` This method parses the string or the InputStream that we passed in through the constructor and builds up the m_nodes and m_edges vectors
    `static void` | `writeDOT(java.lang.String filename, java.lang.String graphName, java.util.ArrayList<GraphNode> nodes, java.util.ArrayList<GraphEdge> edges)` This method saves a graph in a file in DOT format.

    - ### Methods inherited from class java.lang.Object

      `equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### DotParser

          public DotParser(java.io.Reader input,
                   java.util.ArrayList<GraphNode> nodes,
                   java.util.ArrayList<GraphEdge> edges)

      Dot parser Constructor
      Parameters:
        `input` - - The input, if passing in a string then encapsulate that in String reader object
        `nodes` - - Vector to put in GraphNode objects, corresponding to the nodes parsed in from the input
        `edges` - - Vector to put in GraphEdge objects, corresponding to the edges parsed in from the input

  - ### Method Detail

    - #### parse

          public java.lang.String parse()

      This method parses the string or the InputStream that we passed in through the constructor and builds up the m_nodes and m_edges vectors
      Returns:
        - returns the name of the graph

    - #### writeDOT

          public static void writeDOT(java.lang.String filename,
                      java.lang.String graphName,
                      java.util.ArrayList<GraphNode> nodes,
                      java.util.ArrayList<GraphEdge> edges)

      This method saves a graph in a file in DOT format. However, if reloaded in GraphVisualizer we would need to layout the graph again.
      Parameters:
        `filename` - - The name of the file to write in. (will overwrite)
        `graphName` - - The name of the graph
        `nodes` - - Vector containing all the nodes
        `edges` - - Vector containing all the edges