org.nineml.coffeegrinder.trees

Class NopTreeBuilder

java.lang.Object

org.nineml.coffeegrinder.trees.NopTreeBuilder

All Implemented Interfaces:

TreeBuilder

public class NopTreeBuilder
extends java.lang.Object
implements TreeBuilder

This class implements the TreeBuilder interface, but discards all the output.

It is a "no-op" tree builder.

Constructor Summary

Constructors

Constructor and Description
NopTreeBuilder()

Method Summary

Modifier and Type	Method and Description
void	endAmbiguity(int id, int leftExtent, int rightExtent) Called at the end of an ambiguity that is not marked by a single nonterminal.
void	endNonterminal(NonterminalSymbol symbol, java.util.Map<java.lang.String,java.lang.String> attributes, int leftExtent, int rightExtent) Called when a nonterminal ends.
void	endTree(boolean ambiguous, boolean absolutelyAmbiguous, boolean infinitelyAmbiguous) Called last, when construction finishes.
void	startAmbiguity(int id, int leftExtent, int rightExtent) Called at the start of an ambiguity that is not marked by a single nonterminal.
void	startNonterminal(NonterminalSymbol symbol, java.util.Map<java.lang.String,java.lang.String> attributes, int leftExtent, int rightExtent) Called when a new nonterminal begins.
void	startTree() Called first, when construction begins.
void	token(Token token, java.util.Map<java.lang.String,java.lang.String> attributes, int leftExtent, int rightExtent) Called when a terminal occurs.

Methods inherited from class java.lang.Object

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

Constructor Detail

NopTreeBuilder

public NopTreeBuilder()

Method Detail

startTree

public void startTree()

Description copied from interface: TreeBuilder

Called first, when construction begins.

Specified by:

startTree in interface TreeBuilder

endTree

public void endTree(boolean ambiguous,
                    boolean absolutelyAmbiguous,
                    boolean infinitelyAmbiguous)

Description copied from interface: TreeBuilder

Called last, when construction finishes.

Specified by:

endTree in interface TreeBuilder

Parameters:

ambiguous - was the parse ambiguous?

absolutelyAmbiguous - is the graph ambiguous?

infinitelyAmbiguous - is the graph infinitely ambiguous?

startNonterminal

public void startNonterminal(NonterminalSymbol symbol,
                             java.util.Map<java.lang.String,java.lang.String> attributes,
                             int leftExtent,
                             int rightExtent)

Description copied from interface: TreeBuilder

Called when a new nonterminal begins.

Specified by:

startNonterminal in interface TreeBuilder

Parameters:

symbol - The symbol.

attributes - Its attributes.

leftExtent - The starting position in the input.

rightExtent - The ending position in the input.

endNonterminal

public void endNonterminal(NonterminalSymbol symbol,
                           java.util.Map<java.lang.String,java.lang.String> attributes,
                           int leftExtent,
                           int rightExtent)

Description copied from interface: TreeBuilder

Called when a nonterminal ends.

Specified by:

endNonterminal in interface TreeBuilder

Parameters:

symbol - The symbol.

attributes - Its attributes.

leftExtent - The starting position in the input.

rightExtent - The ending position in the input.

token

public void token(Token token,
                  java.util.Map<java.lang.String,java.lang.String> attributes,
                  int leftExtent,
                  int rightExtent)

Description copied from interface: TreeBuilder

Called when a terminal occurs.

Specified by:

token in interface TreeBuilder

Parameters:

token - The terminal token.

attributes - Its attributes.

leftExtent - The starting position in the input.

rightExtent - The ending position in the input.

startAmbiguity

public void startAmbiguity(int id,
                           int leftExtent,
                           int rightExtent)

Description copied from interface: TreeBuilder

Called at the start of an ambiguity that is not marked by a single nonterminal.

The ambiguity id will distinguish this ambiguity from any other ambiguity. The numbers are not sequential or guaranteed stable across parses.

Specified by:

startAmbiguity in interface TreeBuilder

Parameters:

id - The ambiguity id.

leftExtent - The starting position in the input.

rightExtent - The ending position in the input.

endAmbiguity

public void endAmbiguity(int id,
                         int leftExtent,
                         int rightExtent)

Description copied from interface: TreeBuilder

Called at the end of an ambiguity that is not marked by a single nonterminal.

Specified by:

endAmbiguity in interface TreeBuilder

Parameters:

id - The ambiguity id.

leftExtent - The starting position in the input.

rightExtent - The ending position in the input.