protected Object getVariable()

in src/main/java/org/apache/commons/jexl3/internal/InterpreterBase.java [334:370]
29 lines of code
16 McCabe index (conditional complexity)

    protected Object getVariable(final Frame frame, final LexicalScope block, final ASTIdentifier identifier) {
        final int symbol = identifier.getSymbol();
        final String name = identifier.getName();
        // if we have a symbol, we have a scope thus a frame
        if ((options.isLexicalShade() || identifier.isLexical()) && identifier.isShaded()) {
            return undefinedVariable(identifier, name);
        }
        // a local var ?
        if (symbol >= 0 && frame.has(symbol)) {
            final Object value = frame.get(symbol);
            // not out of scope with no lexical shade ?
            if (value != Scope.UNDEFINED) {
                // null operand of an arithmetic operator ?
                if (value == null && isStrictOperand(identifier)) {
                    return unsolvableVariable(identifier, name, false); // defined but null
                }
                return value;
            }
        }
        // consider global
        final Object value = context.get(name);
        // is it null ?
        if (value == null) {
            // is it defined ?
            if (!context.has(name)) {
                // not defined, ignore in some cases...
                final boolean ignore = identifier.jjtGetParent() instanceof ASTReference
                        || (isSafe() && (symbol >= 0 || identifier.jjtGetParent() instanceof ASTAssignment));
                if (!ignore) {
                    return undefinedVariable(identifier, name); // undefined
                }
            } else if (isStrictOperand(identifier)) {
                return unsolvableVariable(identifier, name, false); // defined but null
            }
        }
        return value;
    }