Examples with ASTNumberLiteral org.apache.commons.jexl2.parser.ASTNumberLiteral used on opensource projects

Example 6 with ASTNumberLiteral

use of org.apache.commons.jexl2.parser.ASTNumberLiteral in project commons-jexl by apache.

the class Engine method getVariables.

/**
 * Fills up the list of variables accessed by a node.
 * @param script the owning script
 * @param node the node
 * @param collector the variable collector
 */
protected void getVariables(final ASTJexlScript script, final JexlNode node, final VarCollector collector) {
    if (node instanceof ASTIdentifier) {
        final JexlNode parent = node.jjtGetParent();
        if (parent instanceof ASTMethodNode || parent instanceof ASTFunctionNode) {
            // skip identifiers for methods and functions
            collector.collect(null);
            return;
        }
        final ASTIdentifier identifier = (ASTIdentifier) node;
        final int symbol = identifier.getSymbol();
        // symbols that are captured are considered "global" variables
        if (symbol >= 0 && script != null && !script.isCapturedSymbol(symbol)) {
            collector.collect(null);
        } else {
            // start collecting from identifier
            collector.collect(identifier);
            collector.add(identifier.getName());
        }
    } else if (node instanceof ASTIdentifierAccess) {
        final JexlNode parent = node.jjtGetParent();
        if (parent instanceof ASTMethodNode || parent instanceof ASTFunctionNode) {
            // skip identifiers for methods and functions
            collector.collect(null);
            return;
        }
        // belt and suspender since an identifier should have been seen first
        if (collector.isCollecting()) {
            collector.add(((ASTIdentifierAccess) node).getName());
        }
    } else if (node instanceof ASTArrayAccess && collector.mode > 0) {
        final int num = node.jjtGetNumChildren();
        // collect only if array access is const and follows an identifier
        boolean collecting = collector.isCollecting();
        for (int i = 0; i < num; ++i) {
            final JexlNode child = node.jjtGetChild(i);
            if (collecting && child.isConstant()) {
                // collect all constants or only string and number literals
                final boolean collect = collector.mode > 1 || (child instanceof ASTStringLiteral || child instanceof ASTNumberLiteral);
                if (collect) {
                    final String image = child.toString();
                    collector.add(image);
                }
            } else {
                collecting = false;
                collector.collect(null);
                getVariables(script, child, collector);
                collector.collect(null);
            }
        }
    } else {
        final int num = node.jjtGetNumChildren();
        for (int i = 0; i < num; ++i) {
            getVariables(script, node.jjtGetChild(i), collector);
        }
        collector.collect(null);
    }
}

Example 7 with ASTNumberLiteral

use of org.apache.commons.jexl2.parser.ASTNumberLiteral in project commons-jexl by apache.

the class Interpreter method visit.

@Override
protected Object visit(final ASTUnaryMinusNode node, final Object data) {
    // use cached value if literal
    final Object value = node.jjtGetValue();
    if (value != null && !(value instanceof JexlMethod)) {
        return value;
    }
    final JexlNode valNode = node.jjtGetChild(0);
    final Object val = valNode.jjtAccept(this, data);
    try {
        final Object result = operators.tryOverload(node, JexlOperator.NEGATE, val);
        if (result != JexlEngine.TRY_FAILED) {
            return result;
        }
        Object number = arithmetic.negate(val);
        // cache if number literal and negate is idempotent
        if (number instanceof Number && valNode instanceof ASTNumberLiteral) {
            number = arithmetic.narrowNumber((Number) number, ((ASTNumberLiteral) valNode).getLiteralClass());
            if (arithmetic.isNegateStable()) {
                node.jjtSetValue(number);
            }
        }
        return number;
    } catch (final ArithmeticException xrt) {
        throw new JexlException(valNode, "- error", xrt);
    }
}

Example 8 with ASTNumberLiteral

use of org.apache.commons.jexl2.parser.ASTNumberLiteral in project commons-jexl by apache.

the class Interpreter method visit.

@Override
protected Object visit(final ASTUnaryPlusNode node, final Object data) {
    // use cached value if literal
    final Object value = node.jjtGetValue();
    if (value != null && !(value instanceof JexlMethod)) {
        return value;
    }
    final JexlNode valNode = node.jjtGetChild(0);
    final Object val = valNode.jjtAccept(this, data);
    try {
        final Object result = operators.tryOverload(node, JexlOperator.POSITIVIZE, val);
        if (result != JexlEngine.TRY_FAILED) {
            return result;
        }
        final Object number = arithmetic.positivize(val);
        if (valNode instanceof ASTNumberLiteral && number instanceof Number && arithmetic.isPositivizeStable()) {
            node.jjtSetValue(number);
        }
        return number;
    } catch (final ArithmeticException xrt) {
        throw new JexlException(valNode, "- error", xrt);
    }
}

Example 9 with ASTNumberLiteral

use of org.apache.commons.jexl2.parser.ASTNumberLiteral in project commons-jexl by apache.

the class TemplateScript method collectPrintScope.

/**
 * Collects the scope surrounding a call to jexl:print(i).
 * <p>This allows to later parse the blocks with the known symbols
 * in the frame visible to the parser.
 * @param node the visited node
 * @param minfo the map of printed expression number to node info
 */
private static void collectPrintScope(final JexlNode node, final Map<Integer, JexlNode.Info> minfo) {
    final int nc = node.jjtGetNumChildren();
    if (node instanceof ASTFunctionNode && nc == 2) {
        // 0 must be the prefix jexl:
        final ASTIdentifier nameNode = (ASTIdentifier) node.jjtGetChild(0);
        if ("print".equals(nameNode.getName()) && "jexl".equals(nameNode.getNamespace())) {
            final ASTArguments argNode = (ASTArguments) node.jjtGetChild(1);
            if (argNode.jjtGetNumChildren() == 1) {
                // seek the epression number
                final JexlNode arg0 = argNode.jjtGetChild(0);
                if (arg0 instanceof ASTNumberLiteral) {
                    final int exprNumber = ((ASTNumberLiteral) arg0).getLiteral().intValue();
                    minfo.put(exprNumber, new JexlNode.Info(nameNode));
                    return;
                }
            }
        }
    }
    for (int c = 0; c < nc; ++c) {
        collectPrintScope(node.jjtGetChild(c), minfo);
    }
}

Example 10 with ASTNumberLiteral

use of org.apache.commons.jexl2.parser.ASTNumberLiteral in project commons-jexl by apache.

the class TemplateDebugger method getPrintStatement.

/**
 * In a template, any statement that is not 'jexl:print(n)' must be prefixed by "$$".
 * @param child the node to check
 * @return the expression number or -1 if the node is not a jexl:print
 */
private TemplateExpression getPrintStatement(final JexlNode child) {
    if (exprs != null && child instanceof ASTFunctionNode) {
        final ASTFunctionNode node = (ASTFunctionNode) child;
        final ASTIdentifier ns = (ASTIdentifier) node.jjtGetChild(0);
        final JexlNode args = node.jjtGetChild(1);
        if ("jexl".equals(ns.getNamespace()) && "print".equals(ns.getName()) && args.jjtGetNumChildren() == 1 && args.jjtGetChild(0) instanceof ASTNumberLiteral) {
            final ASTNumberLiteral exprn = (ASTNumberLiteral) args.jjtGetChild(0);
            final int n = exprn.getLiteral().intValue();
            if (n >= 0 && n < exprs.length) {
                return exprs[n];
            }
        }
    }
    return null;
}