Examples of org.apache.commons.jexl2.Main

org.apache.commons.jexl2.parser.JexlNode
Test application for JEXL. @since 2.0

         */
        Object left = node.jjtGetChild(0).jjtAccept(this, data);
        for(int c = 2, size = node.jjtGetNumChildren(); c < size; c += 2) {
            Object right = node.jjtGetChild(c).jjtAccept(this, data);
            try {
                JexlNode op = node.jjtGetChild(c - 1);
                if (op instanceof ASTAdditiveOperator) {
                    String which = ((ASTAdditiveOperator) op).image;
                    if ("+".equals(which)) {
                        left = arithmetic.add(left, right);
                        continue;
                    }
                    if ("-".equals(which)) {
                        left = arithmetic.subtract(left, right);
                        continue;
                    }
                    throw new UnsupportedOperationException("unknown operator " + which);
                }
                throw new IllegalArgumentException("unknown operator " + op);
            } catch (RuntimeException xrt) {
                JexlNode xnode = findNullOperand(xrt, node, left, right);
                throw new JexlException(xnode, "+/- error", xrt);
            }
        }
        return left;
    }

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        Object object = node.jjtGetChild(0).jjtAccept(this, data);
        // can have multiple nodes - either an expression, integer literal or
        // reference
        int numChildren = node.jjtGetNumChildren();
        for (int i = 1; i < numChildren; i++) {
            JexlNode nindex = node.jjtGetChild(i);
            if (nindex instanceof JexlNode.Literal<?>) {
                object = nindex.jjtAccept(this, object);
            } else {
                Object index = nindex.jjtAccept(this, null);
                object = getAttribute(object, index, nindex);
            }
        }


        return object;

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    }
    
    /** {@inheritDoc} */
    public Object visit(ASTAssignment node, Object data) {
        // left contains the reference to assign to
        JexlNode left = node.jjtGetChild(0);
        if (!(left instanceof ASTReference)) {
            throw new JexlException(left, "illegal assignment form");
        }
        // right is the value expression to assign
        Object right = node.jjtGetChild(1).jjtAccept(this, data);


        // determine initial object & property:
        JexlNode objectNode = null;
        Object object = null;
        JexlNode propertyNode = null;
        Object property = null;
        boolean isVariable = true;
        int v = 0;
        StringBuilder variableName = null;
        // 1: follow children till penultimate

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            return arithmetic.divide(left, right);
        } catch (RuntimeException xrt) {
            if (!strict && xrt instanceof ArithmeticException) {
                return new Double(0.0);
            }
            JexlNode xnode = findNullOperand(xrt, node, left, right);
            throw new JexlException(xnode, "divide error", xrt);
        }
    }

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        /* second objectNode is the variable to iterate */
        Object iterableValue = node.jjtGetChild(1).jjtAccept(this, data);
        // make sure there is a value to iterate on and a statement to execute
        if (iterableValue != null && node.jjtGetNumChildren() >= 3) {
            /* third objectNode is the statement to execute */
            JexlNode statement = node.jjtGetChild(2);
            // get an iterator for the collection/array etc via the
            // introspector.
            Iterator<?> itemsIterator = getUberspect().getIterator(iterableValue, node);
            if (itemsIterator != null) {
                while (itemsIterator.hasNext()) {
                    // set loopVariable to value of iterator
                    Object value = itemsIterator.next();
                    context.set(loopVariable.image, value);
                    // execute statement
                    result = statement.jjtAccept(this, data);
                }
            }
        }
        return result;
    }

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    /** {@inheritDoc} */
    public Object visit(ASTJexlScript node, Object data) {
        int numChildren = node.jjtGetNumChildren();
        Object result = null;
        for (int i = 0; i < numChildren; i++) {
            JexlNode child = node.jjtGetChild(i);
            result = child.jjtAccept(this, data);
        }
        return result;
    }

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            return arithmetic.mod(left, right);
        } catch (RuntimeException xrt) {
            if (!strict && xrt instanceof ArithmeticException) {
                return new Double(0.0);
            }
            JexlNode xnode = findNullOperand(xrt, node, left, right);
            throw new JexlException(xnode, "% error", xrt);
        }
    }

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        Object left = node.jjtGetChild(0).jjtAccept(this, data);
        Object right = node.jjtGetChild(1).jjtAccept(this, data);
        try {
            return arithmetic.multiply(left, right);
        } catch (RuntimeException xrt) {
            JexlNode xnode = findNullOperand(xrt, node, left, right);
            throw new JexlException(xnode, "* error", xrt);
        }
    }

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        Object left = node.jjtGetChild(0).jjtAccept(this, data);
        Object right = node.jjtGetChild(1).jjtAccept(this, data);
        try {
            return arithmetic.equals(left, right) ? Boolean.FALSE : Boolean.TRUE;
        } catch (RuntimeException xrt) {
            JexlNode xnode = findNullOperand(xrt, node, left, right);
            throw new JexlException(xnode, "!= error", xrt);
        }
    }

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        Object result = null;
        StringBuilder variableName = null;
        boolean isVariable = true;
        int v = 0;
        for (int c = 0; c < numChildren; c++) {
            JexlNode theNode = node.jjtGetChild(c);
            // integer literals may be part of an antish var name only if no bean was found so far
            if (result == null && theNode instanceof ASTIntegerLiteral) {
                isVariable &= v > 0;
            } else {
                isVariable &= (theNode instanceof ASTIdentifier);
                result = theNode.jjtAccept(this, result);
            }
            // if we get null back a result, check for an ant variable
            if (result == null && isVariable) {
                if (v == 0) {
                    variableName = new StringBuilder(node.jjtGetChild(0).image);

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