public static Apply createRuleCondition() throws URISyntaxException {
    List conditionArgs = new ArrayList();

    // get the function that the condition uses
    FunctionFactory factory = FunctionFactory.getConditionInstance();
    Function conditionFunction = null;
    try {

conditionFunction =

factory.createFunction("urn:oasis:names:tc:xacml:2.0:function:"

+ "time-in-range");**

    } catch (Exception e) {
        // see comment in createTargetMatch()
        return null;
    }

    // now create the apply section that gets the designator value
    List applyArgs = new ArrayList();

    factory = FunctionFactory.getGeneralInstance();
    Function applyFunction = null;
    try {
        applyFunction =
            factory.createFunction("urn:oasis:names:tc:xacml:1.0:function:"
                                   + "time-one-and-only");
    } catch (Exception e) {
        // see comment in createTargetMatch()
        return null;
    }

    URI designatorType =
        new URI("http://www.w3.org/2001/XMLSchema#time");
    URI designatorId =
        new URI("urn:oasis:names:tc:xacml:1.0:environment:current-time");
    AttributeDesignator designator =
            new AttributeDesignator(
                AttributeDesignator.ENVIRONMENT_TARGET,
                designatorType,
                designatorId,
                false,
                null);

    applyArgs.add(designator);

    Apply apply = new Apply(applyFunction, applyArgs, false);

    // add the new apply element to the list of inputs to the condition
    conditionArgs.add(apply);

    // create an AttributeValue and add it to the input list
    StringAttribute value = new StringAttribute("developers");
    conditionArgs.add(value);

    // finally, create & return our Condition
    return new Apply(conditionFunction, conditionArgs, true);
}

在运行至加黑部分时，出现异常，返回空值。
该如何解决呢？
谢谢了！

http://blog.csdn.net/xdxf520/article/details/40188477