Examples of org.apache.commons.jexl2.JexlEngine$Frame

org.apache.commons.jexl2.parser.JexlNode
A call frame, created from a scope, stores the arguments and local variables as "registers". @since 2.1

        try {
            // attempt to reuse last executor cached in volatile JexlNode.value
            if (cache) {
                Object cached = node.jjtGetValue();
                if (cached instanceof JexlMethod) {
                    JexlMethod me = (JexlMethod) cached;
                    Object eval = me.tryInvoke(methodName, data, argv);
                    if (!me.tryFailed(eval)) {
                        return eval;
                    }
                }
            }
            JexlMethod vm = uberspect.getMethod(data, methodName, argv, node);
            // DG: If we can't find an exact match, narrow the parameters and try again!
            if (vm == null) {
                if (arithmetic.narrowArguments(argv)) {
                    vm = uberspect.getMethod(data, methodName, argv, node);
                }
                if (vm == null) {
                    xjexl = new JexlException(node, "unknown or ambiguous method", null);
                }
            }
            if (xjexl == null) {
                Object eval = vm.invoke(data, argv); // vm cannot be null if xjexl is null
                // cache executor in volatile JexlNode.value
                if (cache && vm.isCacheable()) {
                    node.jjtSetValue(vm);
                }
                return eval;
            }
        } catch (InvocationTargetException e) {

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        try {
            // attempt to reuse last executor cached in volatile JexlNode.value
            if (cache) {
                Object cached = node.jjtGetValue();
                if (cached instanceof JexlMethod) {
                    JexlMethod me = (JexlMethod) cached;
                    Object eval = me.tryInvoke(function, namespace, argv);
                    if (!me.tryFailed(eval)) {
                        return eval;
                    }
                }
            }
            JexlMethod vm = uberspect.getMethod(namespace, function, argv, node);
            // DG: If we can't find an exact match, narrow the parameters and
            // try again!
            if (vm == null) {
                // replace all numbers with the smallest type that will fit
                if (arithmetic.narrowArguments(argv)) {
                    vm = uberspect.getMethod(namespace, function, argv, node);
                }
                if (vm == null) {
                    xjexl = new JexlException(node, "unknown function", null);
                }
            }
            if (xjexl == null) {
                Object eval = vm.invoke(namespace, argv); // vm cannot be null if xjexl is null
                // cache executor in volatile JexlNode.value
                if (cache && vm.isCacheable()) {
                    node.jjtSetValue(vm);
                }
                return eval;
            }
        } catch (InvocationTargetException e) {

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            return ((String) val).length();
        } else {
            // check if there is a size method on the object that returns an
            // integer and if so, just use it
            Object[] params = new Object[0];
            JexlMethod vm = uberspect.getMethod(val, "size", EMPTY_PARAMS, node);
            if (vm != null && vm.getReturnType() == Integer.TYPE) {
                Integer result;
                try {
                    result = (Integer) vm.invoke(val, params);
                } catch (Exception e) {
                    throw new JexlException(node, "size() : error executing", e);
                }
                return result.intValue();
            }

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        }
        // attempt to reuse last executor cached in volatile JexlNode.value
        if (node != null && cache) {
            Object cached = node.jjtGetValue();
            if (cached instanceof JexlPropertyGet) {
                JexlPropertyGet vg = (JexlPropertyGet) cached;
                Object value = vg.tryInvoke(object, attribute);
                if (!vg.tryFailed(value)) {
                    return value;
                }
            }
        }
        JexlPropertyGet vg = uberspect.getPropertyGet(object, attribute, node);
        if (vg != null) {
            try {
                Object value = vg.invoke(object);
                // cache executor in volatile JexlNode.value
                if (node != null && cache && vg.isCacheable()) {
                    node.jjtSetValue(vg);
                }
                return value;
            } catch (Exception xany) {
                if (node == null) {

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    protected void setAttribute(Object object, Object attribute, Object value, JexlNode node) {
        // attempt to reuse last executor cached in volatile JexlNode.value
        if (node != null && cache) {
            Object cached = node.jjtGetValue();
            if (cached instanceof JexlPropertySet) {
                JexlPropertySet setter = (JexlPropertySet) cached;
                Object eval = setter.tryInvoke(object, attribute, value);
                if (!setter.tryFailed(eval)) {
                    return;
                }
            }
        }
        JexlException xjexl = null;
        JexlPropertySet vs = uberspect.getPropertySet(object, attribute, value, node);
        if (vs != null) {
            try {
                // cache executor in volatile JexlNode.value
                vs.invoke(object, value);
                if (node != null && cache && vs.isCacheable()) {
                    node.jjtSetValue(vs);
                }
                return;
            } catch (RuntimeException xrt) {
                if (node == null) {

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    }


    // JEXL-52: can be implemented by deriving Interpreter.{g,s}etAttribute; later
    public void test52base() throws Exception {
        JexlEngine jexl = new JexlEngine();
        Uberspect uber = jexl.getUberspect();
        // most likely, call will be in an Interpreter, getUberspect
        String[] names = ((Introspector) uber).getMethodNames(Another.class);
        assertTrue("should find methods", names.length > 0);
        int found = 0;
        for (String name : names) {

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            property = ((ASTIntegerLiteral) propertyNode).getLiteral();
            antVar = true;
        } else if (propertyNode instanceof ASTArrayAccess) {
            // first objectNode is the identifier
            objectNode = propertyNode;
            ASTArrayAccess narray = (ASTArrayAccess) objectNode;
            Object nobject = narray.jjtGetChild(0).jjtAccept(this, object);
            if (nobject == null) {
                throw new JexlException(objectNode, "array element is null");
            } else {
                object = nobject;
            }
            // can have multiple nodes - either an expression, integer literal or
            // reference
            last = narray.jjtGetNumChildren() - 1;
            for (int i = 1; i < last; i++) {
                objectNode = narray.jjtGetChild(i);
                if (objectNode instanceof JexlNode.Literal<?>) {
                    object = objectNode.jjtAccept(this, object);
                } else {
                    Object index = objectNode.jjtAccept(this, null);
                    object = getAttribute(object, index, objectNode);
                }
            }
            property = narray.jjtGetChild(last).jjtAccept(this, null);
        } else {
            throw new JexlException(objectNode, "illegal assignment form");
        }
        // deal with ant variable; set context
        if (antVar) {

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    /** {@inheritDoc} */
    public Object visit(ASTForeachStatement node, Object data) {
        Object result = null;
        /* first objectNode is the loop variable */
        ASTReference loopReference = (ASTReference) node.jjtGetChild(0);
        ASTIdentifier loopVariable = (ASTIdentifier) loopReference.jjtGetChild(0);
        /* 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 */

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    /** {@inheritDoc} */
    public Object visit(ASTForeachStatement node, Object data) {
        Object result = null;
        /* first objectNode is the loop variable */
        ASTReference loopReference = (ASTReference) node.jjtGetChild(0);
        ASTIdentifier loopVariable = (ASTIdentifier) loopReference.jjtGetChild(0);
        /* 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 */

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         */
        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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