DotTreeGenerator Class

Namespace: Stimulsoft.Data.Expressions.Antlr.Runtime.Tree

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);

Methods

Method Details

defineEdges

defineEdges(tree: any, adaptor: ITreeAdaptor): string[]

Parameters

• tree (any)
• adaptor (ITreeAdaptor)

Returns string[]

defineNodes

defineNodes(tree: any, adaptor: ITreeAdaptor): string[]

Parameters

• tree (any)
• adaptor (ITreeAdaptor)

Returns string[]

fixString

fixString(text: string): string

Parameters

• text (string)

Returns string

getNodeNumber

getNodeNumber(t: any): number

Parameters

• t (any)

Returns number

getNodeText

getNodeText(adaptor: ITreeAdaptor, t: any): string

Parameters

• adaptor (ITreeAdaptor)
• t (any)

Returns string

toDot

toDot(tree: ITree): string

Parameters

• tree (ITree)

Returns string

toDot2

toDot2(tree: any, adaptor: ITreeAdaptor): string

Generate DOT (graphviz) for a whole tree not just a node. For example, 3+45 should generate: digraph { node [shape=plaintext, fixedsize=true, fontsize=11, fontname=”Courier”, width=.4, height=.2]; edge [arrowsize=.7] “+”->3 “+”->”” “”->4 “”->5 } Takes a Tree interface object.

Parameters

• tree (any)
• adaptor (ITreeAdaptor)

Returns string

Fields