/**
* Private helper used by the function factory code to load a specific target, condition, or
* general section.
*/
private void functionParserHelper(Node root, FunctionFactory factory) throws ParsingException {
// go through all elements in the section
NodeList children = root.getChildNodes();
for (int i = 0; i < children.getLength(); i++) {
Node child = children.item(i);
String name = child.getNodeName();
if (name.equals("function")) {
// a function section is a simple class element
Function function = (Function) (loadClass("function", child));
try {
factory.addFunction(function);
} catch (IllegalArgumentException iae) {
throw new ParsingException("duplicate function", iae);
}
} else if (name.equals("abstractFunction")) {
// an abstract function is a class with an identifier
URI identifier = null;
try {
identifier = new URI(child.getAttributes().getNamedItem("identifier").getNodeValue());
} catch (URISyntaxException urise) {
throw new ParsingException("invalid function identifier", urise);
}
FunctionProxy proxy = (FunctionProxy) (loadClass("abstract function", child));
try {
factory.addAbstractFunction(proxy, identifier);
} catch (IllegalArgumentException iae) {
throw new ParsingException("duplicate abstract function", iae);
}
} else if (name.equals("functionCluster")) {
// a cluster is a class that will give us a collection of
// functions that need to be added one by one into the factory
FunctionCluster cluster = (FunctionCluster) (loadClass("function cluster", child));
for (Function function : cluster.getSupportedFunctions()) {
try {
factory.addFunction(function);
} catch (IllegalArgumentException iae) {
throw new ParsingException("duplicate function", iae);
}
}
}
}
}
/**
* Registers all the supported factories with the given identifiers. If a given identifier is
* already in use, then that factory is not registered. This method is provided only as a
* convenience, and any registration that may involve identifier clashes should be done by
* registering each factory individually.
*/
public void registerFunctionFactories() {
for (String id : functionMap.keySet()) {
FunctionFactoryProxy ffp = (FunctionFactoryProxy) (functionMap.get(id));
try {
FunctionFactory.registerFactory(id, ffp);
} catch (IllegalArgumentException iae) {
logger.log(
Level.WARNING, "Couldn't register FunctionFactory: " + id + " (already in use)", iae);
}
}
}
/**
* Uses the default configuration to re-set the default factories used by the system (attribute,
* combining algorithm, and function). If a default is not provided for a given factory, then that
* factory will not be set as the system's default.
*/
public void useDefaultFactories() {
logger.fine("Switching to default factories from configuration");
// set the default attribute factory, if it exists here
if (defaultAttributeFactory != null) {
AttributeFactory.setDefaultFactory(new AFProxy(defaultAttributeFactory));
}
// set the default combining algorithm factory, if it exists here
if (defaultCombiningFactory != null) {
CombiningAlgFactory.setDefaultFactory(new CAFProxy(defaultCombiningFactory));
}
// set the default function factories, if they exists here
if (defaultFunctionFactoryProxy != null)
FunctionFactory.setDefaultFactory(defaultFunctionFactoryProxy);
}
/**
* Private helper function used by both constructors to actually load the configuration data. This
* is the root of several private methods used to setup all the pdps and factories.
*/
private void setupConfig(File configFile) throws ParsingException {
logger.config("Loading runtime configuration");
// load our classloader
loader = getClass().getClassLoader();
// get the root node from the configuration file
Node root = getRootNode(configFile);
// initialize all the maps
pdpConfigMap = new HashMap<String, PDPConfig>();
attributeMap = new HashMap<String, AttributeFactory>();
combiningMap = new HashMap<String, CombiningAlgFactory>();
functionMap = new HashMap<String, FunctionFactoryProxy>();
// get the default names
NamedNodeMap attrs = root.getAttributes();
String defaultPDP = attrs.getNamedItem("defaultPDP").getNodeValue();
String defaultAF = getDefaultFactory(attrs, "defaultAttributeFactory");
String defaultCAF = getDefaultFactory(attrs, "defaultCombiningAlgFactory");
String defaultFF = getDefaultFactory(attrs, "defaultFunctionFactory");
// loop through all the root-level elements, for each one getting its
// name and then loading the right kind of element
NodeList children = root.getChildNodes();
for (int i = 0; i < children.getLength(); i++) {
Node child = children.item(i);
String childName = child.getNodeName();
String elementName = null;
// get the element's name
if (child.getNodeType() == Node.ELEMENT_NODE)
elementName = child.getAttributes().getNamedItem("name").getNodeValue();
// see if this is a pdp or a factory, and load accordingly,
// putting the new element into the respective map...make sure
// that we're never loading something with the same name twice
if (childName.equals("pdp")) {
if (logger.isLoggable(Level.CONFIG)) logger.config("Loading PDP: " + elementName);
if (pdpConfigMap.containsKey(elementName))
throw new ParsingException("more that one pdp with " + "name \"" + elementName + "\"");
pdpConfigMap.put(elementName, parsePDPConfig(child));
} else if (childName.equals("attributeFactory")) {
if (logger.isLoggable(Level.CONFIG))
logger.config("Loading AttributeFactory: " + elementName);
if (attributeMap.containsKey(elementName))
throw new ParsingException(
"more that one " + "attributeFactory with name " + elementName + "\"");
attributeMap.put(elementName, parseAttributeFactory(child));
} else if (childName.equals("combiningAlgFactory")) {
if (logger.isLoggable(Level.CONFIG))
logger.config("Loading CombiningAlgFactory: " + elementName);
if (combiningMap.containsKey(elementName))
throw new ParsingException(
"more that one " + "combiningAlgFactory with " + "name \"" + elementName + "\"");
combiningMap.put(elementName, parseCombiningAlgFactory(child));
} else if (childName.equals("functionFactory")) {
if (logger.isLoggable(Level.CONFIG))
logger.config("Loading FunctionFactory: " + elementName);
if (functionMap.containsKey(elementName))
throw new ParsingException(
"more that one functionFactory" + " with name \"" + elementName + "\"");
functionMap.put(elementName, parseFunctionFactory(child));
}
}
// finally, extract the default elements
defaultPDPConfig = (PDPConfig) (pdpConfigMap.get(defaultPDP));
defaultAttributeFactory = (AttributeFactory) (attributeMap.get(defaultAF));
if (defaultAttributeFactory == null) {
try {
defaultAttributeFactory = AttributeFactory.getInstance(defaultAF);
} catch (Exception e) {
throw new ParsingException("Unknown AttributeFactory", e);
}
}
defaultCombiningFactory = (CombiningAlgFactory) (combiningMap.get(defaultCAF));
if (defaultCombiningFactory == null) {
try {
defaultCombiningFactory = CombiningAlgFactory.getInstance(defaultCAF);
} catch (Exception e) {
throw new ParsingException("Unknown CombininAlgFactory", e);
}
}
defaultFunctionFactoryProxy = (FunctionFactoryProxy) (functionMap.get(defaultFF));
if (defaultFunctionFactoryProxy == null) {
try {
defaultFunctionFactoryProxy = FunctionFactory.getInstance(defaultFF);
} catch (Exception e) {
throw new ParsingException("Unknown FunctionFactory", e);
}
}
}
@Override
protected Condition createCondition() {
URI designatorType = null;
URI designatorId = null;
try {
designatorType = new URI("http://www.w3.org/2001/XMLSchema#integer");
designatorId = new URI(getId());
} catch (URISyntaxException ex) {
log.fatal(null, ex);
}
FunctionFactory factory = FunctionFactory.getConditionInstance();
Function conditionFunction = null;
try {
conditionFunction = factory.createFunction(globalFunction.getFunctionName());
} catch (UnknownIdentifierException ex) {
log.fatal(null, ex);
} catch (FunctionTypeException ex) {
log.fatal(null, ex);
}
if (this.values.isEmpty()) {
List tmp = new ArrayList();
tmp.add(BooleanAttribute.getInstance(false));
return new Condition(conditionFunction, tmp);
}
Function conditionFunction2 = null;
try {
conditionFunction2 = factory.createFunction("urn:oasis:names:tc:xacml:1.0:function:" + "and");
} catch (UnknownIdentifierException ex) {
log.fatal(null, ex);
} catch (FunctionTypeException ex) {
log.fatal(null, ex);
}
factory = FunctionFactory.getGeneralInstance();
Function greaterFunction;
try {
greaterFunction =
factory.createFunction(ComparisonFunction.NAME_INTEGER_GREATER_THAN_OR_EQUAL);
} catch (Exception e) {
log.fatal("Exception in condition creation", e);
return null;
}
Function lessFunction;
try {
lessFunction = factory.createFunction(ComparisonFunction.NAME_INTEGER_LESS_THAN_OR_EQUAL);
} catch (Exception e) {
log.fatal("Exception in condition creation", e);
return null;
}
URI quantityDesignatorId = null;
try {
quantityDesignatorId = new URI("urn:oasis:names:tc:xacml:1.0:resource:quantity-id");
} catch (URISyntaxException ex) {
log.error(null, ex);
}
Function quantityFunction;
try {
quantityFunction =
factory.createFunction("urn:oasis:names:tc:xacml:1.0:function:" + "integer-one-and-only");
} catch (Exception e) {
log.fatal("Exception in SCQuantity condition", e);
return null;
}
List applyCondArgs = new ArrayList();
List conditionArgs = new ArrayList();
for (Object quantitiesOb : values) {
applyCondArgs.clear();
List quantities = (List) quantitiesOb;
List applyArgs = new ArrayList();
List applyArgsUser = new ArrayList();
List greatApplyArgs = new ArrayList();
List greatApplyArgsUser = new ArrayList();
AttributeDesignator lowDesignator =
new AttributeDesignator(
AttributeDesignator.RESOURCE_TARGET,
designatorType,
quantityDesignatorId,
false,
null);
applyArgsUser.add(lowDesignator);
Apply lowApplyUser = new Apply(quantityFunction, applyArgsUser);
IntegerAttribute lowQuantityAttribute = new IntegerAttribute((Long) quantities.get(0));
applyArgs.add(lowApplyUser);
applyArgs.add(lowQuantityAttribute);
Apply lowApply = new Apply(greaterFunction, applyArgs);
applyCondArgs.add(lowApply);
AttributeDesignator greatDesignator =
new AttributeDesignator(
AttributeDesignator.RESOURCE_TARGET,
designatorType,
quantityDesignatorId,
false,
null);
greatApplyArgsUser.add(greatDesignator);
Apply greatApplyUser = new Apply(quantityFunction, greatApplyArgsUser);
IntegerAttribute greatQuantityAttribute = new IntegerAttribute((Long) quantities.get(1));
greatApplyArgs.add(greatApplyUser);
greatApplyArgs.add(greatQuantityAttribute);
Apply applyCondition = new Apply(lessFunction, greatApplyArgs);
applyCondArgs.add(applyCondition);
Apply applyCond = new Apply(conditionFunction2, applyCondArgs);
conditionArgs.add(applyCond);
}
Condition condition = new Condition(conditionFunction, conditionArgs);
return condition;
}
