Examples with ANTLRStringStream org.antlr.runtime.ANTLRStringStream used on opensource projects

Example 71 with ANTLRStringStream

use of org.antlr.runtime.ANTLRStringStream in project nifi by apache.

the class ExpressionCompiler method compile.

public CompiledExpression compile(final String expression) {
    try {
        final CharStream input = new ANTLRStringStream(expression);
        final AttributeExpressionLexer lexer = new AttributeExpressionLexer(input);
        final CommonTokenStream lexerTokenStream = new CommonTokenStream(lexer);
        final AttributeExpressionParser parser = new AttributeExpressionParser(lexerTokenStream);
        final Tree ast = (Tree) parser.query().getTree();
        final Tree tree = ast.getChild(0);
        final Evaluator<?> evaluator = buildEvaluator(tree);
        verifyMappingEvaluatorReduced(evaluator);
        final Set<Evaluator<?>> allEvaluators = new HashSet<>(evaluators);
        this.evaluators.clear();
        return new CompiledExpression(expression, evaluator, tree, allEvaluators);
    } catch (final AttributeExpressionLanguageParsingException e) {
        throw e;
    } catch (final Exception e) {
        throw new AttributeExpressionLanguageParsingException(e);
    }
}

Example 72 with ANTLRStringStream

use of org.antlr.runtime.ANTLRStringStream in project xtext-xtend by eclipse.

the class LexerBenchmark method timeLexing.

public int timeLexing(int reps) throws Exception {
    int result = reps;
    for (int i = 0; i < reps; i++) {
        Token tok = null;
        lexer.setCharStream(new ANTLRStringStream(contentToParse));
        while (tok != Token.EOF_TOKEN) {
            tok = lexer.nextToken();
            result++;
        }
        result += reps;
    }
    return result;
}

Example 73 with ANTLRStringStream

use of org.antlr.runtime.ANTLRStringStream in project drools by kiegroup.

the class JavaExprAnalyzer method parse.

private JavaParser parse(final String expr) {
    final CharStream charStream = new ANTLRStringStream(expr);
    final JavaLexer lexer = new JavaLexer(charStream);
    final TokenStream tokenStream = new CommonTokenStream(lexer);
    return new JavaParser(tokenStream);
}

Example 74 with ANTLRStringStream

use of org.antlr.runtime.ANTLRStringStream in project drools by kiegroup.

the class RuleParserTest method testChunkWithParensAndQuotedString.

@Test
public void testChunkWithParensAndQuotedString() throws Exception {
    String input = "( fnord( \"cheese\" ) )";
    createParser(new ANTLRStringStream(input));
    String returnData = parser.chunk(DRL6Lexer.LEFT_PAREN, DRL6Lexer.RIGHT_PAREN, -1);
    assertEquals("fnord( \"cheese\" )", returnData);
}

Example 75 with ANTLRStringStream

use of org.antlr.runtime.ANTLRStringStream in project drools by kiegroup.

the class RuleParserTest method testChunkWithoutParens.

@Test
public void testChunkWithoutParens() throws Exception {
    String input = "( foo )";
    createParser(new ANTLRStringStream(input));
    String returnData = parser.chunk(DRL6Lexer.LEFT_PAREN, DRL6Lexer.RIGHT_PAREN, -1);
    assertEquals("foo", returnData);
}