ANTLR 4 Runtime 4.13.1 · org.antlr.v4.runtime.atn.ATNSerializer

This class represents a target neutral serializer for ATNs. An ATN is converted to a list of integers that can be converted back to and ATN. We compute the list of integers and then generate an array into the target language for a particular lexer or parser. Java is a special case where we must generate strings instead of arrays, but that is handled outside of this class. See ATNDeserializer#encodeIntsWith16BitWords(IntegerList) and org.antlr.v4.codegen.model.SerializedJavaATN.

Field Summary

Modifier and Type	Field and Description
public ATN	atn
private final IntegerList	data
private final IntegerList	nonGreedyStates
private final IntegerList	precedenceStates
private final Map<IntervalSet, Boolean>	sets Note that we use a LinkedHashMap as a set to mainintain insertion order while deduplicating entries with the same key.

Constructor Summary

Access	Constructor and Description
public	ATNSerializer(ATN atn)

Method Summary

Modifier and Type	Method and Description
private void	addDecisionStartStates()
private void	addEdges(int nedges, Map<IntervalSet, Integer> setIndices)
private int	addEdges()
private void	addLexerActions()
private void	addModeStartStates()
private void	addNonGreedyStates()
private void	addPreamble()
private void	addPrecedenceStates()
private void	addRuleStatesAndLexerTokenTypes()
private Map<IntervalSet, Integer>	addSets()
public static IntegerList	getSerialized(ATN atn)
public IntegerList	serialize() Serialize state descriptors, edge descriptors, and decision→state map into list of ints.
private static void	serializeSets(IntegerList data, Collection<IntervalSet> sets)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

atn	back to summary
public ATN atn

data	back to summary
private final IntegerList data

nonGreedyStates	back to summary
private final IntegerList nonGreedyStates

precedenceStates	back to summary
private final IntegerList precedenceStates

sets	back to summary
private final Map<IntervalSet, Boolean> sets Note that we use a LinkedHashMap as a set to mainintain insertion order while deduplicating entries with the same key.

Constructor Detail

ATNSerializer	back to summary
public ATNSerializer(ATN atn)

Method Detail

addDecisionStartStates	back to summary
private void addDecisionStartStates()

addEdges	back to summary
private void addEdges(int nedges, Map<IntervalSet, Integer> setIndices)

addEdges	back to summary
private int addEdges()

addLexerActions	back to summary
private void addLexerActions()

addModeStartStates	back to summary
private void addModeStartStates()

addNonGreedyStates	back to summary
private void addNonGreedyStates()

addPreamble	back to summary
private void addPreamble()

addPrecedenceStates	back to summary
private void addPrecedenceStates()

addRuleStatesAndLexerTokenTypes	back to summary
private void addRuleStatesAndLexerTokenTypes()

addSets	back to summary
private Map<IntervalSet, Integer> addSets()

getSerialized	back to summary
public static IntegerList getSerialized(ATN atn)

serialize	back to summary
public IntegerList serialize() Serialize state descriptors, edge descriptors, and decision→state map into list of ints. Likely out of date, but keeping as it could be helpful: SERIALIZED_VERSION UUID (2 longs) grammar-type, (ANTLRParser.LEXER, ...) max token type, num states, state-0-type ruleIndex, state-1-type ruleIndex, ... state-i-type ruleIndex optional-arg ... num rules, rule-1-start-state rule-1-args, rule-2-start-state rule-2-args, ... (args are token type,actionIndex in lexer else 0,0) num modes, mode-0-start-state, mode-1-start-state, ... (parser has 0 modes) num unicode-bmp-sets bmp-set-0-interval-count intervals, bmp-set-1-interval-count intervals, ... num unicode-smp-sets smp-set-0-interval-count intervals, smp-set-1-interval-count intervals, ... num total edges, src, trg, edge-type, edge arg1, optional edge arg2 (present always), ... num decisions, decision-0-start-state, decision-1-start-state, ... Convenient to pack into unsigned shorts to make as Java string.

serialize

back to summary

public IntegerList serialize()

Serialize state descriptors, edge descriptors, and decision→state map into list of ints. Likely out of date, but keeping as it could be helpful: SERIALIZED_VERSION UUID (2 longs) grammar-type, (ANTLRParser.LEXER, ...) max token type, num states, state-0-type ruleIndex, state-1-type ruleIndex, ... state-i-type ruleIndex optional-arg ... num rules, rule-1-start-state rule-1-args, rule-2-start-state rule-2-args, ... (args are token type,actionIndex in lexer else 0,0) num modes, mode-0-start-state, mode-1-start-state, ... (parser has 0 modes) num unicode-bmp-sets bmp-set-0-interval-count intervals, bmp-set-1-interval-count intervals, ... num unicode-smp-sets smp-set-0-interval-count intervals, smp-set-1-interval-count intervals, ... num total edges, src, trg, edge-type, edge arg1, optional edge arg2 (present always), ... num decisions, decision-0-start-state, decision-1-start-state, ... Convenient to pack into unsigned shorts to make as Java string.

serializeSets	back to summary
private static void serializeSets(IntegerList data, Collection<IntervalSet> sets)