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

Example 66 with ANTLRStringStream

use of org.antlr.runtime.ANTLRStringStream in project SQLWindowing by hbutani.

the class ParseUtils method parseSelect.

public static SelectSpec parseSelect(String selectExprStr) throws WindowingException {
    Windowing2Lexer lexer;
    CommonTokenStream tokens;
    Windowing2Parser parser = null;
    CommonTree t;
    CommonTreeNodeStream nodes;
    QSpecBuilder2 qSpecBldr = null;
    String err;
    try {
        lexer = new Windowing2Lexer(new ANTLRStringStream(selectExprStr));
        tokens = new CommonTokenStream(lexer);
        parser = new Windowing2Parser(tokens);
        parser.setTreeAdaptor(TranslateUtils.adaptor);
        t = (CommonTree) parser.select().getTree();
        err = parser.getWindowingParseErrors();
        if (err != null) {
            throw new WindowingException(err);
        }
    } catch (WindowingException we) {
        throw we;
    } catch (Throwable te) {
        err = parser.getWindowingParseErrors();
        if (err != null) {
            throw new WindowingException(err);
        }
        throw new WindowingException("Parse Error:" + te.toString(), te);
    }
    TranslateUtils.unescapeStringLiterals((ASTNode) t);
    try {
        nodes = new CommonTreeNodeStream(t);
        nodes.setTokenStream(tokens);
        qSpecBldr = new QSpecBuilder2(nodes);
        SelectSpec selectSpec = qSpecBldr.select();
        err = qSpecBldr.getWindowingParseErrors();
        if (err != null) {
            throw new WindowingException(err);
        }
        return selectSpec;
    } catch (WindowingException we) {
        throw we;
    } catch (Throwable te) {
        err = qSpecBldr.getWindowingParseErrors();
        if (err != null) {
            throw new WindowingException(err);
        }
        throw new WindowingException("Parse Error:" + te.toString(), te);
    }
}

Example 67 with ANTLRStringStream

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

the class PhysicalOpUnitTestBase method parseExpr.

@Override
protected LogicalExpression parseExpr(String expr) {
    ExprLexer lexer = new ExprLexer(new ANTLRStringStream(expr));
    CommonTokenStream tokens = new CommonTokenStream(lexer);
    ExprParser parser = new ExprParser(tokens);
    try {
        return parser.parse().e;
    } catch (RecognitionException e) {
        throw new RuntimeException("Error parsing expression: " + expr);
    }
}

Example 68 with ANTLRStringStream

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

the class TestEvaluationVisitor method getExpr.

private LogicalExpression getExpr(String expr) throws Exception {
    ExprLexer lexer = new ExprLexer(new ANTLRStringStream(expr));
    CommonTokenStream tokens = new CommonTokenStream(lexer);
    //    tokens.fill();
    //    for(Token t : (List<Token>) tokens.getTokens()){
    //      System.out.println(t + "" + t.getType());
    //    }
    //    tokens.rewind();
    ExprParser parser = new ExprParser(tokens);
    parse_return ret = parser.parse();
    return ret.e;
}

Example 69 with ANTLRStringStream

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

the class ExecTest method parseExpr.

protected LogicalExpression parseExpr(String expr) throws RecognitionException {
    final ExprLexer lexer = new ExprLexer(new ANTLRStringStream(expr));
    final CommonTokenStream tokens = new CommonTokenStream(lexer);
    final ExprParser parser = new ExprParser(tokens);
    final ExprParser.parse_return ret = parser.parse();
    return ret.e;
}

Example 70 with ANTLRStringStream

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

the class RecordPath method compile.

/**
 * Compiles a RecordPath from the given text
 *
 * @param path the textual representation of the RecordPath
 * @return the compiled RecordPath
 * @throws RecordPathException if the given text is not a valid RecordPath
 */
public static RecordPath compile(final String path) throws RecordPathException {
    try {
        final CharStream input = new ANTLRStringStream(path);
        final RecordPathLexer lexer = new RecordPathLexer(input);
        final CommonTokenStream lexerTokenStream = new CommonTokenStream(lexer);
        final RecordPathParser parser = new RecordPathParser(lexerTokenStream);
        final Tree tree = (Tree) parser.pathExpression().getTree();
        // We look at the first child, because 'tree' is a PATH_EXPRESSION and we really
        // want the underlying PATH token.
        final Tree firstChild = tree.getChild(0);
        final int childType = firstChild.getType();
        final boolean absolute;
        final RecordPathSegment rootPath;
        if (childType == PATH || childType == CHILD_REFERENCE) {
            rootPath = new RootPath();
            absolute = true;
        } else {
            rootPath = null;
            absolute = false;
        }
        return RecordPathCompiler.compile(firstChild, rootPath, absolute);
    } catch (final RecordPathException e) {
        throw e;
    } catch (final Exception e) {
        throw new RecordPathException(e);
    }
}