org.antlr.runtime.tree

Class DOTTreeGenerator

java.lang.Object

org.antlr.runtime.tree.DOTTreeGenerator

public class DOTTreeGenerator
extends java.lang.Object

A utility class to generate DOT diagrams (graphviz) from arbitrary trees. You can pass in your own templates and can pass in any kind of tree or use Tree interface method. I wanted this separator so that you don't have to include ST just to use the org.antlr.runtime.tree.* package. This is a set of non-static methods so you can subclass to override. For example, here is an invocation: CharStream input = new ANTLRInputStream(System.in); TLexer lex = new TLexer(input); CommonTokenStream tokens = new CommonTokenStream(lex); TParser parser = new TParser(tokens); TParser.e_return r = parser.e(); Tree t = (Tree)r.tree; System.out.println(t.toStringTree()); DOTTreeGenerator gen = new DOTTreeGenerator(); StringTemplate st = gen.toDOT(t); System.out.println(st);

Field Summary

Fields

Modifier and Type	Field and Description
static StringTemplate	_edgeST
static StringTemplate	_nodeST
static StringTemplate	_treeST

Constructor Summary

Constructors

Constructor and Description
DOTTreeGenerator()

Method Summary

Modifier and Type	Method and Description
protected java.lang.String	fixString(java.lang.String in)
protected int	getNodeNumber(java.lang.Object t)
protected StringTemplate	getNodeST(TreeAdaptor adaptor, java.lang.Object t)
StringTemplate	toDOT(java.lang.Object tree, TreeAdaptor adaptor)
StringTemplate	toDOT(java.lang.Object tree, TreeAdaptor adaptor, StringTemplate _treeST, StringTemplate _edgeST)
StringTemplate	toDOT(Tree tree) Generate DOT (graphviz) for a whole tree not just a node.
protected void	toDOTDefineEdges(java.lang.Object tree, TreeAdaptor adaptor, StringTemplate treeST)
protected void	toDOTDefineNodes(java.lang.Object tree, TreeAdaptor adaptor, StringTemplate treeST)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

_treeST

public static StringTemplate _treeST

_nodeST

public static StringTemplate _nodeST

_edgeST

public static StringTemplate _edgeST

Constructor Detail

DOTTreeGenerator

public DOTTreeGenerator()

Method Detail

toDOT

public StringTemplate toDOT(java.lang.Object tree,
                            TreeAdaptor adaptor,
                            StringTemplate _treeST,
                            StringTemplate _edgeST)

toDOT

public StringTemplate toDOT(java.lang.Object tree,
                            TreeAdaptor adaptor)

toDOT

public StringTemplate toDOT(Tree tree)

Generate DOT (graphviz) for a whole tree not just a node. For example, 3+4*5 should generate: digraph { node [shape=plaintext, fixedsize=true, fontsize=11, fontname="Courier", width=.4, height=.2]; edge [arrowsize=.7] "+"->3 "+"->"*" "*"->4 "*"->5 } Return the ST not a string in case people want to alter. Takes a Tree interface object.

toDOTDefineNodes

protected void toDOTDefineNodes(java.lang.Object tree,
                                TreeAdaptor adaptor,
                                StringTemplate treeST)

toDOTDefineEdges

protected void toDOTDefineEdges(java.lang.Object tree,
                                TreeAdaptor adaptor,
                                StringTemplate treeST)

getNodeST

protected StringTemplate getNodeST(TreeAdaptor adaptor,
                                   java.lang.Object t)

getNodeNumber

protected int getNodeNumber(java.lang.Object t)

fixString

protected java.lang.String fixString(java.lang.String in)