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/*
* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
* Use of this file is governed by the BSD 3-clause license that
* can be found in the LICENSE.txt file in the project root.
*/
package org.antlr.v4.runtime;
import org.antlr.v4.runtime.atn.ATNConfigSet;
import org.antlr.v4.runtime.dfa.DFA;
import java.util.BitSet;
import java.util.Collection;
/**
* This implementation of {@link ANTLRErrorListener} dispatches all calls to a
* collection of delegate listeners. This reduces the effort required to support multiple
* listeners.
*
* @author Sam Harwell
*/
public class ProxyErrorListener implements ANTLRErrorListener {
private final Collection delegates;
public ProxyErrorListener(Collection delegates) {
if (delegates == null) {
throw new NullPointerException("delegates");
}
this.delegates = delegates;
}
@Override
public void syntaxError(Recognizer recognizer,
Object offendingSymbol,
int line,
int charPositionInLine,
String msg,
RecognitionException e)
{
for (ANTLRErrorListener listener : delegates) {
listener.syntaxError(recognizer, offendingSymbol, line, charPositionInLine, msg, e);
}
}
@Override
public void reportAmbiguity(Parser recognizer,
DFA dfa,
int startIndex,
int stopIndex,
boolean exact,
BitSet ambigAlts,
ATNConfigSet configs)
{
for (ANTLRErrorListener listener : delegates) {
listener.reportAmbiguity(recognizer, dfa, startIndex, stopIndex, exact, ambigAlts, configs);
}
}
@Override
public void reportAttemptingFullContext(Parser recognizer,
DFA dfa,
int startIndex,
int stopIndex,
BitSet conflictingAlts,
ATNConfigSet configs)
{
for (ANTLRErrorListener listener : delegates) {
listener.reportAttemptingFullContext(recognizer, dfa, startIndex, stopIndex, conflictingAlts, configs);
}
}
@Override
public void reportContextSensitivity(Parser recognizer,
DFA dfa,
int startIndex,
int stopIndex,
int prediction,
ATNConfigSet configs)
{
for (ANTLRErrorListener listener : delegates) {
listener.reportContextSensitivity(recognizer, dfa, startIndex, stopIndex, prediction, configs);
}
}
}