/**
* Creates a new <code>PolicySet</code> by parsing the given <code>Node</code> representing a
* XACML PolicySet element.
*
* @param nodePolicySet the <code>Node</code> representing the XACML PolicySetelement
* @param policyDefaultsParent the {@link com.att.research.xacmlatt.pdp.policy.PolicyDefaults}
* from the parent element
* @return a new <code>PolicySet</code> parsed from the given <code>Node</code>
* @throws DOMStructureException if there is an error parsing the <code>Node</code>
*/
public static PolicySet newInstance(
Node nodePolicySet, PolicySet policySetParent, PolicyDefaults policyDefaultsParent)
throws DOMStructureException {
Element elementPolicySet = DOMUtil.getElement(nodePolicySet);
boolean bLenient = DOMProperties.isLenient();
PolicySet domPolicySet = new PolicySet(policySetParent);
Iterator<?> iterator;
Identifier identifier;
Integer integer;
try {
NodeList children = elementPolicySet.getChildNodes();
int numChildren;
if (children != null && (numChildren = children.getLength()) > 0) {
/*
* Run through once, quickly, to set the PolicyDefaults for the new DOMPolicySet
*/
for (int i = 0; i < numChildren; i++) {
Node child = children.item(i);
if (DOMUtil.isNamespaceElement(child, XACML3.XMLNS)
&& XACML3.ELEMENT_POLICYDEFAULTS.equals(child.getLocalName())) {
if (domPolicySet.getPolicyDefaults() != null && !bLenient) {
throw DOMUtil.newUnexpectedElementException(child, nodePolicySet);
}
domPolicySet.setPolicyDefaults(
DOMPolicyDefaults.newInstance(child, policyDefaultsParent));
}
}
if (domPolicySet.getPolicyDefaults() == null) {
domPolicySet.setPolicyDefaults(policyDefaultsParent);
}
/*
* Now process the other elements so we can pull up the parent policy defaults
*/
for (int i = 0; i < numChildren; i++) {
Node child = children.item(i);
if (DOMUtil.isElement(child)) {
if (DOMUtil.isInNamespace(child, XACML3.XMLNS)) {
String childName = child.getLocalName();
if (XACML3.ELEMENT_DESCRIPTION.equals(childName)) {
if (domPolicySet.getDescription() != null && !bLenient) {
throw DOMUtil.newUnexpectedElementException(child, nodePolicySet);
}
domPolicySet.setDescription(child.getTextContent());
} else if (XACML3.ELEMENT_POLICYISSUER.equals(childName)) {
if (domPolicySet.getPolicyIssuer() != null && !bLenient) {
throw DOMUtil.newUnexpectedElementException(child, nodePolicySet);
}
domPolicySet.setPolicyIssuer(DOMPolicyIssuer.newInstance(child));
} else if (XACML3.ELEMENT_POLICYSETDEFAULTS.equals(childName)) {
} else if (XACML3.ELEMENT_TARGET.equals(childName)) {
if (domPolicySet.getTarget() != null && !bLenient) {
throw DOMUtil.newUnexpectedElementException(child, nodePolicySet);
}
domPolicySet.setTarget(DOMTarget.newInstance(child));
} else if (XACML3.ELEMENT_POLICYSET.equals(childName)) {
domPolicySet.addChild(
DOMPolicySet.newInstance(
child, domPolicySet, domPolicySet.getPolicyDefaults()));
} else if (XACML3.ELEMENT_POLICY.equals(childName)) {
domPolicySet.addChild(
DOMPolicy.newInstance(child, domPolicySet, domPolicySet.getPolicyDefaults()));
} else if (XACML3.ELEMENT_POLICYIDREFERENCE.equals(childName)) {
domPolicySet.addChild(DOMPolicyIdReference.newInstance(child, domPolicySet));
} else if (XACML3.ELEMENT_POLICYSETIDREFERENCE.equals(childName)) {
domPolicySet.addChild(DOMPolicySetIdReference.newInstance(child, domPolicySet));
} else if (XACML3.ELEMENT_COMBINERPARAMETERS.equals(childName)) {
domPolicySet.addCombinerParameters(DOMCombinerParameter.newList(child));
} else if (XACML3.ELEMENT_POLICYCOMBINERPARAMETERS.equals(childName)) {
domPolicySet.addPolicyCombinerParameter(
DOMPolicyCombinerParameter.newInstance(child));
} else if (XACML3.ELEMENT_POLICYSETCOMBINERPARAMETERS.equals(childName)) {
domPolicySet.addPolicyCombinerParameter(
DOMPolicySetCombinerParameter.newInstance(child));
} else if (XACML3.ELEMENT_OBLIGATIONEXPRESSIONS.equals(childName)) {
if ((iterator = domPolicySet.getObligationExpressions()) != null
&& iterator.hasNext()
&& !bLenient) {
throw DOMUtil.newUnexpectedElementException(child, nodePolicySet);
}
domPolicySet.setObligationExpressions(DOMObligationExpression.newList(child, null));
} else if (XACML3.ELEMENT_ADVICEEXPRESSIONS.equals(childName)) {
if ((iterator = domPolicySet.getAdviceExpressions()) != null
&& iterator.hasNext()
&& !bLenient) {
throw DOMUtil.newUnexpectedElementException(child, nodePolicySet);
}
domPolicySet.setAdviceExpressions(DOMAdviceExpression.newList(child, null));
} else if (!bLenient) {
throw DOMUtil.newUnexpectedElementException(child, nodePolicySet);
}
} else if (!bLenient) {
throw DOMUtil.newUnexpectedElementException(child, nodePolicySet);
}
}
}
}
if (domPolicySet.getTarget() == null && !bLenient) {
throw DOMUtil.newMissingElementException(
nodePolicySet, XACML3.XMLNS, XACML3.ELEMENT_TARGET);
}
/*
* Get the attributes
*/
domPolicySet.setIdentifier(
DOMUtil.getIdentifierAttribute(
elementPolicySet, XACML3.ATTRIBUTE_POLICYSETID, !bLenient));
domPolicySet.setVersion(
DOMUtil.getVersionAttribute(elementPolicySet, XACML3.ATTRIBUTE_VERSION, !bLenient));
identifier =
DOMUtil.getIdentifierAttribute(
elementPolicySet, XACML3.ATTRIBUTE_POLICYCOMBININGALGID, !bLenient);
CombiningAlgorithm<PolicySetChild> combiningAlgorithm = null;
try {
combiningAlgorithm =
CombiningAlgorithmFactory.newInstance().getPolicyCombiningAlgorithm(identifier);
} catch (FactoryException ex) {
if (!bLenient) {
throw new DOMStructureException("Failed to get CombinginAlgorithm", ex);
}
}
if (combiningAlgorithm == null && !bLenient) {
throw new DOMStructureException(
elementPolicySet,
"Unknown policy combining algorithm \""
+ identifier
+ "\" in \""
+ DOMUtil.getNodeLabel(nodePolicySet));
} else {
domPolicySet.setPolicyCombiningAlgorithm(combiningAlgorithm);
}
if ((integer =
DOMUtil.getIntegerAttribute(elementPolicySet, XACML3.ATTRIBUTE_MAXDELEGATIONDEPTH))
!= null) {
domPolicySet.setMaxDelegationDepth(integer);
}
} catch (DOMStructureException ex) {
domPolicySet.setStatus(StdStatusCode.STATUS_CODE_SYNTAX_ERROR, ex.getMessage());
if (DOMProperties.throwsExceptions()) {
throw ex;
}
}
return domPolicySet;
}
public static boolean repair(Node nodePolicySet) throws DOMStructureException {
Element elementPolicySet = DOMUtil.getElement(nodePolicySet);
boolean result = false;
NodeList children = elementPolicySet.getChildNodes();
int numChildren;
boolean sawDescription = false;
boolean sawPolicyIssuer = false;
boolean sawPolicyDefaults = false;
boolean sawTarget = false;
boolean sawObligationExprs = false;
boolean sawAdviceExprs = false;
if (children != null && (numChildren = children.getLength()) > 0) {
/*
* Now process the other elements so we can pull up the parent policy defaults
*/
for (int i = 0; i < numChildren; i++) {
Node child = children.item(i);
if (DOMUtil.isElement(child)) {
if (DOMUtil.isInNamespace(child, XACML3.XMLNS)) {
String childName = child.getLocalName();
if (XACML3.ELEMENT_DESCRIPTION.equals(childName)) {
if (sawDescription) {
logger.warn("Unexpected element " + child.getNodeName());
elementPolicySet.removeChild(child);
result = true;
} else {
sawDescription = true;
}
} else if (XACML3.ELEMENT_POLICYISSUER.equals(childName)) {
if (sawPolicyIssuer) {
logger.warn("Unexpected element " + child.getNodeName());
elementPolicySet.removeChild(child);
result = true;
} else {
sawPolicyIssuer = true;
result = DOMPolicyIssuer.repair(child) || result;
}
} else if (XACML3.ELEMENT_POLICYSETDEFAULTS.equals(childName)) {
if (sawPolicyDefaults) {
logger.warn("Unexpected element " + child.getNodeName());
elementPolicySet.removeChild(child);
result = true;
} else {
sawPolicyDefaults = true;
result = DOMPolicyDefaults.repair(child) || result;
}
} else if (XACML3.ELEMENT_TARGET.equals(childName)) {
if (sawTarget) {
logger.warn("Unexpected element " + child.getNodeName());
elementPolicySet.removeChild(child);
result = true;
} else {
sawTarget = true;
result = DOMTarget.repair(child) || result;
}
} else if (XACML3.ELEMENT_POLICYSET.equals(childName)) {
result = DOMPolicySet.repair(child) || result;
} else if (XACML3.ELEMENT_POLICY.equals(childName)) {
result = DOMPolicy.repair(child) || result;
} else if (XACML3.ELEMENT_POLICYIDREFERENCE.equals(childName)) {
result = DOMPolicyIdReference.repair(child) || result;
} else if (XACML3.ELEMENT_POLICYSETIDREFERENCE.equals(childName)) {
result = DOMPolicySetIdReference.repair(child) || result;
} else if (XACML3.ELEMENT_COMBINERPARAMETERS.equals(childName)) {
result = DOMCombinerParameter.repair(child) || result;
} else if (XACML3.ELEMENT_POLICYCOMBINERPARAMETERS.equals(childName)) {
result = DOMPolicyCombinerParameter.repair(child) || result;
} else if (XACML3.ELEMENT_POLICYSETCOMBINERPARAMETERS.equals(childName)) {
result = DOMPolicySetCombinerParameter.repair(child) || result;
} else if (XACML3.ELEMENT_OBLIGATIONEXPRESSIONS.equals(childName)) {
if (sawObligationExprs) {
logger.warn("Unexpected element " + child.getNodeName());
elementPolicySet.removeChild(child);
result = true;
} else {
sawObligationExprs = true;
result = DOMObligationExpression.repairList(child) || result;
}
} else if (XACML3.ELEMENT_ADVICEEXPRESSIONS.equals(childName)) {
if (sawAdviceExprs) {
logger.warn("Unexpected element " + child.getNodeName());
elementPolicySet.removeChild(child);
result = true;
} else {
sawAdviceExprs = true;
result = DOMAdviceExpression.repairList(child) || result;
}
} else {
logger.warn("Unexpected element " + child.getNodeName());
elementPolicySet.removeChild(child);
result = true;
}
} else {
logger.warn("Unexpected element " + child.getNodeName());
elementPolicySet.removeChild(child);
result = true;
}
}
}
}
if (!sawTarget) {
throw DOMUtil.newMissingElementException(nodePolicySet, XACML3.XMLNS, XACML3.ELEMENT_TARGET);
}
/*
* Get the attributes
*/
result =
DOMUtil.repairIdentifierAttribute(elementPolicySet, XACML3.ATTRIBUTE_POLICYSETID, logger)
|| result;
result =
DOMUtil.repairVersionAttribute(elementPolicySet, XACML3.ATTRIBUTE_VERSION, logger)
|| result;
result =
DOMUtil.repairIdentifierAttribute(
elementPolicySet,
XACML3.ATTRIBUTE_POLICYCOMBININGALGID,
XACML3.ID_POLICY_DENY_OVERRIDES,
logger)
|| result;
Identifier identifier =
DOMUtil.getIdentifierAttribute(elementPolicySet, XACML3.ATTRIBUTE_POLICYCOMBININGALGID);
CombiningAlgorithm<PolicySetChild> combiningAlgorithm = null;
try {
combiningAlgorithm =
CombiningAlgorithmFactory.newInstance().getPolicyCombiningAlgorithm(identifier);
} catch (FactoryException ex) {
combiningAlgorithm = null;
}
if (combiningAlgorithm == null) {
logger.warn(
"Setting invalid "
+ XACML3.ATTRIBUTE_POLICYCOMBININGALGID
+ " attribute "
+ identifier.stringValue()
+ " to "
+ XACML3.ID_POLICY_DENY_OVERRIDES.stringValue());
elementPolicySet.setAttribute(
XACML3.ATTRIBUTE_POLICYCOMBININGALGID, XACML3.ID_POLICY_DENY_OVERRIDES.stringValue());
result = true;
}
return result;
}
