Examples with TokenType org.apache.asterix.external.classad.Lexer.TokenType used on opensource projects

Example 11 with TokenType

use of org.apache.asterix.external.classad.Lexer.TokenType in project asterixdb by apache.

the class ClassAdParser method parsePostfixExpression.

// PostfixExpression .= PrimaryExpression
// | PostfixExpression '.' Identifier
// | PostfixExpression '[' Expression ']'
private boolean parsePostfixExpression(ExprTreeHolder tree) throws IOException {
    TokenType tt;
    if (!parsePrimaryExpression(tree)) {
        return false;
    }
    while ((tt = lexer.peekToken()) == TokenType.LEX_OPEN_BOX || tt == TokenType.LEX_SELECTION) {
        ExprTreeHolder treeL = tree;
        ExprTreeHolder treeR = objectPool.mutableExprPool.get();
        TokenValue tv = objectPool.tokenValuePool.get();
        lexer.consumeToken();
        if (tt == TokenType.LEX_OPEN_BOX) {
            // subscript operation
            parseExpression(treeR);
            if (treeL.getInnerTree() != null && treeR.getInnerTree() != null) {
                Operation newTree = objectPool.operationPool.get();
                Operation.createOperation(Operation.OpKind_SUBSCRIPT_OP, treeL, treeR, null, newTree);
                if (lexer.consumeToken() == TokenType.LEX_CLOSE_BOX) {
                    tree.setInnerTree(newTree);
                    continue;
                }
            }
            tree.setInnerTree(null);
            return false;
        } else if (tt == TokenType.LEX_SELECTION) {
            // field selection operation
            if ((tt = lexer.consumeToken(tv)) != TokenType.LEX_IDENTIFIER) {
                throw new HyracksDataException("second argument of selector must be an " + "identifier (got" + String.valueOf(Lexer.strLexToken(tt)) + ")");
            }
            AttributeReference newTree = objectPool.attrRefPool.get();
            AttributeReference.createAttributeReference(treeL, tv.getStrValue(), false, newTree);
            tree.setInnerTree(newTree);
        }
    }
    return true;
}

Example 12 with TokenType

use of org.apache.asterix.external.classad.Lexer.TokenType in project asterixdb by apache.

the class ClassAdParser method parseClassAd.

public boolean parseClassAd(ClassAd ad, boolean full) throws IOException {
    TokenType tt;
    ad.clear();
    if ((tt = lexer.consumeToken()) != TokenType.LEX_OPEN_BOX) {
        return false;
    }
    tt = lexer.peekToken();
    TokenValue tv = objectPool.tokenValuePool.get();
    ExprTreeHolder tree = objectPool.mutableExprPool.get();
    while (tt != TokenType.LEX_CLOSE_BOX) {
        // Get the name of the expression
        tv.reset();
        tree.reset();
        tt = lexer.consumeToken(tv);
        if (tt == TokenType.LEX_SEMICOLON) {
            // that was bitten by this.
            continue;
        }
        if (tt != TokenType.LEX_IDENTIFIER) {
            throw new HyracksDataException("while parsing classad:  expected LEX_IDENTIFIER " + " but got " + Lexer.strLexToken(tt));
        }
        // consume the intermediate '='
        if ((tt = lexer.consumeToken()) != TokenType.LEX_BOUND_TO) {
            throw new HyracksDataException("while parsing classad:  expected LEX_BOUND_TO " + " but got " + Lexer.strLexToken(tt));
        }
        isExpr = false;
        parseExpression(tree);
        if (tree.getInnerTree() == null) {
            throw new HyracksDataException("parse expression returned empty tree");
        }
        // insert the attribute into the classad
        if (!ad.insert(tv.getStrValue().toString(), tree)) {
            throw new HyracksDataException("Couldn't insert value to classad");
        }
        // the next token must be a ';' or a ']'
        tt = lexer.peekToken();
        if (tt != TokenType.LEX_SEMICOLON && tt != TokenType.LEX_CLOSE_BOX) {
            throw new HyracksDataException("while parsing classad:  expected LEX_SEMICOLON or " + "LEX_CLOSE_BOX but got " + Lexer.strLexToken(tt));
        }
        // while the first case accounts for optional beginning semicolons.
        while (tt == TokenType.LEX_SEMICOLON) {
            lexer.consumeToken();
            tt = lexer.peekToken();
        }
    }
    lexer.consumeToken();
    // if a full parse was requested, ensure that input is exhausted
    if (full && (lexer.consumeToken() != TokenType.LEX_END_OF_INPUT)) {
        throw new HyracksDataException("while parsing classad:  expected LEX_END_OF_INPUT for " + "full parse but got " + Lexer.strLexToken(tt));
    }
    return true;
}

Example 13 with TokenType

use of org.apache.asterix.external.classad.Lexer.TokenType in project asterixdb by apache.

the class ClassAdParser method parseAdditiveExpression.

// AdditiveExpression .= MultiplicativeExpression
// | AdditiveExpression '+' MultiplicativeExpression
// | AdditiveExpression '-' MultiplicativeExpression
private boolean parseAdditiveExpression(ExprTreeHolder tree) throws IOException {
    if (!parseMultiplicativeExpression(tree)) {
        return false;
    }
    TokenType tt = lexer.peekToken();
    while (tt == TokenType.LEX_PLUS || tt == TokenType.LEX_MINUS) {
        ExprTreeHolder treeL = tree;
        ExprTreeHolder treeR = objectPool.mutableExprPool.get();
        lexer.consumeToken();
        parseMultiplicativeExpression(treeR);
        if (treeL.getInnerTree() != null && treeR.getInnerTree() != null) {
            Operation newTree = objectPool.operationPool.get();
            Operation.createOperation((tt == TokenType.LEX_PLUS) ? Operation.OpKind_ADDITION_OP : Operation.OpKind_SUBTRACTION_OP, treeL, treeR, null, newTree);
            tree.setInnerTree(newTree);
        } else {
            tree.setInnerTree(null);
            return false;
        }
        tt = lexer.peekToken();
    }
    return true;
}