protected void setAttribute()

in src/main/java/org/apache/commons/jexl3/internal/InterpreterBase.java [930:983]
48 lines of code
16 McCabe index (conditional complexity)

    protected void setAttribute(final Object object, final Object attribute, final Object value, final JexlNode node) {
        cancelCheck(node);
        final JexlOperator operator = node != null && node.jjtGetParent() instanceof ASTArrayAccess
                                      ? JexlOperator.ARRAY_SET : JexlOperator.PROPERTY_SET;
        final Object result = operators.tryOverload(node, operator, object, attribute, value);
        if (result != JexlEngine.TRY_FAILED) {
            return;
        }
        Exception xcause = null;
        try {
            // attempt to reuse last executor cached in volatile JexlNode.value
            if (node != null && cache) {
                final Object cached = node.jjtGetValue();
                if (cached instanceof JexlPropertySet) {
                    final JexlPropertySet setter = (JexlPropertySet) cached;
                    final Object eval = setter.tryInvoke(object, attribute, value);
                    if (!setter.tryFailed(eval)) {
                        return;
                    }
                }
            }
            final List<JexlUberspect.PropertyResolver> resolvers = uberspect.getResolvers(operator, object);
            JexlPropertySet vs = uberspect.getPropertySet(resolvers, object, attribute, value);
            // if we can't find an exact match, narrow the value argument and try again
            if (vs == null) {
                // replace all numbers with the smallest type that will fit
                final Object[] narrow = {value};
                if (arithmetic.narrowArguments(narrow)) {
                    vs = uberspect.getPropertySet(resolvers, object, attribute, narrow[0]);
                }
            }
            if (vs != null) {
                // cache executor in volatile JexlNode.value
                vs.invoke(object, value);
                if (node != null && cache && vs.isCacheable()) {
                    node.jjtSetValue(vs);
                }
                return;
            }
        } catch (final Exception xany) {
            xcause = xany;
        }
        // lets fail
        if (node == null) {
            // direct call
            final String error = "unable to set object property"
                    + ", class: " + object.getClass().getName()
                    + ", property: " + attribute
                    + ", argument: " + value.getClass().getSimpleName();
            throw new UnsupportedOperationException(error, xcause);
        }
        final String attrStr = Objects.toString(attribute, null);
        unsolvableProperty(node, attrStr, true, xcause);
    }