aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.xml.internal.ws.policy.sourcemodel;
aoqi@0: 
aoqi@0: import java.util.ArrayList;
aoqi@0: import java.util.Collection;
aoqi@0: import java.util.Collections;
aoqi@0: import java.util.HashMap;
aoqi@0: import java.util.LinkedList;
aoqi@0: import java.util.List;
aoqi@0: import java.util.Map;
aoqi@0: import java.util.Queue;
aoqi@0: 
aoqi@0: import com.sun.xml.internal.ws.policy.AssertionSet;
aoqi@0: import com.sun.xml.internal.ws.policy.Policy;
aoqi@0: import com.sun.xml.internal.ws.policy.PolicyAssertion;
aoqi@0: import com.sun.xml.internal.ws.policy.PolicyException;
aoqi@0: import com.sun.xml.internal.ws.policy.privateutil.LocalizationMessages;
aoqi@0: import com.sun.xml.internal.ws.policy.privateutil.PolicyLogger;
aoqi@0: import com.sun.xml.internal.ws.policy.privateutil.PolicyUtils;
aoqi@0: import com.sun.xml.internal.ws.policy.spi.AssertionCreationException;
aoqi@0: import com.sun.xml.internal.ws.policy.spi.PolicyAssertionCreator;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * This class provides a method for translating a {@link PolicySourceModel} structure to a normalized {@link Policy} expression.
aoqi@0:  * The resulting Policy is disconnected from its model, thus any additional changes in the model will have no effect on the Policy
aoqi@0:  * expression.
aoqi@0:  *
aoqi@0:  * @author Marek Potociar
aoqi@0:  * @author Fabian Ritzmann
aoqi@0:  */
aoqi@0: public class PolicyModelTranslator {
aoqi@0: 
aoqi@0:     private static final class ContentDecomposition {
aoqi@0:         final List<Collection<ModelNode>> exactlyOneContents = new LinkedList<Collection<ModelNode>>();
aoqi@0:         final List<ModelNode> assertions = new LinkedList<ModelNode>();
aoqi@0: 
aoqi@0:         void reset() {
aoqi@0:             exactlyOneContents.clear();
aoqi@0:             assertions.clear();
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     private static final class RawAssertion {
aoqi@0:         ModelNode originalNode; // used to initialize nestedPolicy and nestedAssertions in the constructor of RawAlternative
aoqi@0:         Collection<RawAlternative> nestedAlternatives = null;
aoqi@0:         final Collection<ModelNode> parameters;
aoqi@0: 
aoqi@0:         RawAssertion(ModelNode originalNode, Collection<ModelNode> parameters) {
aoqi@0:             this.parameters = parameters;
aoqi@0:             this.originalNode = originalNode;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     private static final class RawAlternative {
aoqi@0:         private static final PolicyLogger LOGGER = PolicyLogger.getLogger(PolicyModelTranslator.RawAlternative.class);
aoqi@0: 
aoqi@0:         final List<RawPolicy> allNestedPolicies = new LinkedList<RawPolicy>(); // used to track the nested policies which need to be normalized
aoqi@0:         final Collection<RawAssertion> nestedAssertions;
aoqi@0: 
aoqi@0:         RawAlternative(Collection<ModelNode> assertionNodes) throws PolicyException {
aoqi@0:             this.nestedAssertions = new LinkedList<RawAssertion>();
aoqi@0:             for (ModelNode node : assertionNodes) {
aoqi@0:                 RawAssertion assertion = new RawAssertion(node, new LinkedList<ModelNode>());
aoqi@0:                 nestedAssertions.add(assertion);
aoqi@0: 
aoqi@0:                 for (ModelNode assertionNodeChild : assertion.originalNode.getChildren()) {
aoqi@0:                     switch (assertionNodeChild.getType()) {
aoqi@0:                         case ASSERTION_PARAMETER_NODE:
aoqi@0:                             assertion.parameters.add(assertionNodeChild);
aoqi@0:                             break;
aoqi@0:                         case POLICY:
aoqi@0:                         case POLICY_REFERENCE:
aoqi@0:                             if (assertion.nestedAlternatives == null) {
aoqi@0:                                 assertion.nestedAlternatives = new LinkedList<RawAlternative>();
aoqi@0:                                 RawPolicy nestedPolicy;
aoqi@0:                                 if (assertionNodeChild.getType() == ModelNode.Type.POLICY) {
aoqi@0:                                     nestedPolicy = new RawPolicy(assertionNodeChild, assertion.nestedAlternatives);
aoqi@0:                                 } else {
aoqi@0:                                     nestedPolicy = new RawPolicy(getReferencedModelRootNode(assertionNodeChild), assertion.nestedAlternatives);
aoqi@0:                                 }
aoqi@0:                                 this.allNestedPolicies.add(nestedPolicy);
aoqi@0:                             } else {
aoqi@0:                                 throw LOGGER.logSevereException(new PolicyException(LocalizationMessages.WSP_0006_UNEXPECTED_MULTIPLE_POLICY_NODES()));
aoqi@0:                             }
aoqi@0:                             break;
aoqi@0:                         default:
aoqi@0:                             throw LOGGER.logSevereException(new PolicyException(LocalizationMessages.WSP_0008_UNEXPECTED_CHILD_MODEL_TYPE(assertionNodeChild.getType())));
aoqi@0:                     }
aoqi@0:                 }
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:     }
aoqi@0: 
aoqi@0:     private static final class RawPolicy {
aoqi@0:         final Collection<ModelNode> originalContent;
aoqi@0:         final Collection<RawAlternative> alternatives;
aoqi@0: 
aoqi@0:         RawPolicy(ModelNode policyNode, Collection<RawAlternative> alternatives) {
aoqi@0:             originalContent = policyNode.getChildren();
aoqi@0:             this.alternatives = alternatives;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     private static final PolicyLogger LOGGER = PolicyLogger.getLogger(PolicyModelTranslator.class);
aoqi@0: 
aoqi@0:     private static final PolicyAssertionCreator defaultCreator = new DefaultPolicyAssertionCreator();
aoqi@0: 
aoqi@0:     private final Map<String, PolicyAssertionCreator> assertionCreators;
aoqi@0: 
aoqi@0: 
aoqi@0:     private PolicyModelTranslator() throws PolicyException {
aoqi@0:         this(null);
aoqi@0:     }
aoqi@0: 
aoqi@0:     protected PolicyModelTranslator(final Collection<PolicyAssertionCreator> creators) throws PolicyException {
aoqi@0:         LOGGER.entering(creators);
aoqi@0: 
aoqi@0:         final Collection<PolicyAssertionCreator> allCreators = new LinkedList<PolicyAssertionCreator>();
aoqi@0:         final PolicyAssertionCreator[] discoveredCreators = PolicyUtils.ServiceProvider.load(PolicyAssertionCreator.class);
aoqi@0:         for (PolicyAssertionCreator creator : discoveredCreators) {
aoqi@0:             allCreators.add(creator);
aoqi@0:         }
aoqi@0:         if (creators != null) {
aoqi@0:             for (PolicyAssertionCreator creator : creators) {
aoqi@0:                 allCreators.add(creator);
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         final Map<String, PolicyAssertionCreator> pacMap = new HashMap<String, PolicyAssertionCreator>();
aoqi@0:         for (PolicyAssertionCreator creator : allCreators) {
aoqi@0:             final String[] supportedURIs = creator.getSupportedDomainNamespaceURIs();
aoqi@0:             final String creatorClassName = creator.getClass().getName();
aoqi@0: 
aoqi@0:             if (supportedURIs == null || supportedURIs.length == 0) {
aoqi@0:                 LOGGER.warning(LocalizationMessages.WSP_0077_ASSERTION_CREATOR_DOES_NOT_SUPPORT_ANY_URI(creatorClassName));
aoqi@0:                 continue;
aoqi@0:             }
aoqi@0: 
aoqi@0:             for (String supportedURI : supportedURIs) {
aoqi@0:                 LOGGER.config(LocalizationMessages.WSP_0078_ASSERTION_CREATOR_DISCOVERED(creatorClassName, supportedURI));
aoqi@0:                 if (supportedURI == null || supportedURI.length() == 0) {
aoqi@0:                     throw LOGGER.logSevereException(new PolicyException(
aoqi@0:                             LocalizationMessages.WSP_0070_ERROR_REGISTERING_ASSERTION_CREATOR(creatorClassName)));
aoqi@0:                 }
aoqi@0: 
aoqi@0:                 final PolicyAssertionCreator oldCreator = pacMap.put(supportedURI, creator);
aoqi@0:                 if (oldCreator != null) {
aoqi@0:                     throw LOGGER.logSevereException(new PolicyException(
aoqi@0:                             LocalizationMessages.WSP_0071_ERROR_MULTIPLE_ASSERTION_CREATORS_FOR_NAMESPACE(
aoqi@0:                             supportedURI, oldCreator.getClass().getName(), creator.getClass().getName())));
aoqi@0:                 }
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         this.assertionCreators = Collections.unmodifiableMap(pacMap);
aoqi@0:         LOGGER.exiting();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Method returns thread-safe policy model translator instance.
aoqi@0:      *
aoqi@0:      * This method is only intended to be used by code that has no dependencies on
aoqi@0:      * JAX-WS. Otherwise use com.sun.xml.internal.ws.policy.api.ModelTranslator.
aoqi@0:      *
aoqi@0:      * @return A policy model translator instance.
aoqi@0:      * @throws PolicyException If instantiating a PolicyAssertionCreator failed.
aoqi@0:      */
aoqi@0:     public static PolicyModelTranslator getTranslator() throws PolicyException {
aoqi@0:         return new PolicyModelTranslator();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * The method translates {@link PolicySourceModel} structure into normalized {@link Policy} expression. The resulting Policy
aoqi@0:      * is disconnected from its model, thus any additional changes in model will have no effect on the Policy expression.
aoqi@0:      *
aoqi@0:      * @param model the model to be translated into normalized policy expression. Must not be {@code null}.
aoqi@0:      * @return translated policy expression in it's normalized form.
aoqi@0:      * @throws PolicyException in case of translation failure
aoqi@0:      */
aoqi@0:     public Policy translate(final PolicySourceModel model) throws PolicyException {
aoqi@0:         LOGGER.entering(model);
aoqi@0: 
aoqi@0:         if (model == null) {
aoqi@0:             throw LOGGER.logSevereException(new PolicyException(LocalizationMessages.WSP_0043_POLICY_MODEL_TRANSLATION_ERROR_INPUT_PARAM_NULL()));
aoqi@0:         }
aoqi@0: 
aoqi@0:         PolicySourceModel localPolicyModelCopy;
aoqi@0:         try {
aoqi@0:             localPolicyModelCopy = model.clone();
aoqi@0:         } catch (CloneNotSupportedException e) {
aoqi@0:             throw LOGGER.logSevereException(new PolicyException(LocalizationMessages.WSP_0016_UNABLE_TO_CLONE_POLICY_SOURCE_MODEL(), e));
aoqi@0:         }
aoqi@0: 
aoqi@0:         final String policyId = localPolicyModelCopy.getPolicyId();
aoqi@0:         final String policyName = localPolicyModelCopy.getPolicyName();
aoqi@0: 
aoqi@0:         final Collection<AssertionSet> alternatives = createPolicyAlternatives(localPolicyModelCopy);
aoqi@0:         LOGGER.finest(LocalizationMessages.WSP_0052_NUMBER_OF_ALTERNATIVE_COMBINATIONS_CREATED(alternatives.size()));
aoqi@0: 
aoqi@0:         Policy policy = null;
aoqi@0:         if (alternatives.size() == 0) {
aoqi@0:             policy = Policy.createNullPolicy(model.getNamespaceVersion(), policyName, policyId);
aoqi@0:             LOGGER.finest(LocalizationMessages.WSP_0055_NO_ALTERNATIVE_COMBINATIONS_CREATED());
aoqi@0:         } else if (alternatives.size() == 1 && alternatives.iterator().next().isEmpty()) {
aoqi@0:             policy = Policy.createEmptyPolicy(model.getNamespaceVersion(), policyName, policyId);
aoqi@0:             LOGGER.finest(LocalizationMessages.WSP_0026_SINGLE_EMPTY_ALTERNATIVE_COMBINATION_CREATED());
aoqi@0:         } else {
aoqi@0:             policy = Policy.createPolicy(model.getNamespaceVersion(), policyName, policyId, alternatives);
aoqi@0:             LOGGER.finest(LocalizationMessages.WSP_0057_N_ALTERNATIVE_COMBINATIONS_M_POLICY_ALTERNATIVES_CREATED(alternatives.size(), policy.getNumberOfAssertionSets()));
aoqi@0:         }
aoqi@0: 
aoqi@0:         LOGGER.exiting(policy);
aoqi@0:         return policy;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Method creates policy alternatives according to provided model. The model structure is modified in the process.
aoqi@0:      *
aoqi@0:      * @return created policy alternatives resulting from policy source model.
aoqi@0:      */
aoqi@0:     private Collection<AssertionSet> createPolicyAlternatives(final PolicySourceModel model) throws PolicyException {
aoqi@0:         // creating global method variables
aoqi@0:         final ContentDecomposition decomposition = new ContentDecomposition();
aoqi@0: 
aoqi@0:         // creating processing queue and starting the processing iterations
aoqi@0:         final Queue<RawPolicy> policyQueue = new LinkedList<RawPolicy>();
aoqi@0:         final Queue<Collection<ModelNode>> contentQueue = new LinkedList<Collection<ModelNode>>();
aoqi@0: 
aoqi@0:         final RawPolicy rootPolicy = new RawPolicy(model.getRootNode(), new LinkedList<RawAlternative>());
aoqi@0:         RawPolicy processedPolicy = rootPolicy;
aoqi@0:         do {
aoqi@0:             Collection<ModelNode> processedContent = processedPolicy.originalContent;
aoqi@0:             do {
aoqi@0:                 decompose(processedContent, decomposition);
aoqi@0:                 if (decomposition.exactlyOneContents.isEmpty()) {
aoqi@0:                     final RawAlternative alternative = new RawAlternative(decomposition.assertions);
aoqi@0:                     processedPolicy.alternatives.add(alternative);
aoqi@0:                     if (!alternative.allNestedPolicies.isEmpty()) {
aoqi@0:                         policyQueue.addAll(alternative.allNestedPolicies);
aoqi@0:                     }
aoqi@0:                 } else { // we have a non-empty collection of exactly ones
aoqi@0:                     final Collection<Collection<ModelNode>> combinations = PolicyUtils.Collections.combine(decomposition.assertions, decomposition.exactlyOneContents, false);
aoqi@0:                     if (combinations != null && !combinations.isEmpty()) {
aoqi@0:                         // processed alternative was split into some new alternatives, which we need to process
aoqi@0:                         contentQueue.addAll(combinations);
aoqi@0:                     }
aoqi@0:                 }
aoqi@0:             } while ((processedContent = contentQueue.poll()) != null);
aoqi@0:         } while ((processedPolicy = policyQueue.poll()) != null);
aoqi@0: 
aoqi@0:         // normalize nested policies to contain single alternative only
aoqi@0:         final Collection<AssertionSet> assertionSets = new LinkedList<AssertionSet>();
aoqi@0:         for (RawAlternative rootAlternative : rootPolicy.alternatives) {
aoqi@0:             final Collection<AssertionSet> normalizedAlternatives = normalizeRawAlternative(rootAlternative);
aoqi@0:             assertionSets.addAll(normalizedAlternatives);
aoqi@0:         }
aoqi@0: 
aoqi@0:         return assertionSets;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Decomposes the unprocessed alternative content into two different collections:
aoqi@0:      * <p/>
aoqi@0:      * Content of 'EXACTLY_ONE' child nodes is expanded and placed in one list and
aoqi@0:      * 'ASSERTION' nodes are placed into other list. Direct 'ALL' and 'POLICY' child nodes are 'dissolved' in the process.
aoqi@0:      *
aoqi@0:      * Method reuses precreated ContentDecomposition object, which is reset before reuse.
aoqi@0:      */
aoqi@0:     private void decompose(final Collection<ModelNode> content, final ContentDecomposition decomposition) throws PolicyException {
aoqi@0:         decomposition.reset();
aoqi@0: 
aoqi@0:         final Queue<ModelNode> allContentQueue = new LinkedList<ModelNode>(content);
aoqi@0:         ModelNode node;
aoqi@0:         while ((node = allContentQueue.poll()) != null) {
aoqi@0:             // dissolving direct 'POLICY', 'POLICY_REFERENCE' and 'ALL' child nodes
aoqi@0:             switch (node.getType()) {
aoqi@0:                 case POLICY :
aoqi@0:                 case ALL :
aoqi@0:                     allContentQueue.addAll(node.getChildren());
aoqi@0:                     break;
aoqi@0:                 case POLICY_REFERENCE :
aoqi@0:                     allContentQueue.addAll(getReferencedModelRootNode(node).getChildren());
aoqi@0:                     break;
aoqi@0:                 case EXACTLY_ONE :
aoqi@0:                     decomposition.exactlyOneContents.add(expandsExactlyOneContent(node.getChildren()));
aoqi@0:                     break;
aoqi@0:                 case ASSERTION :
aoqi@0:                     decomposition.assertions.add(node);
aoqi@0:                     break;
aoqi@0:                 default :
aoqi@0:                     throw LOGGER.logSevereException(new PolicyException(LocalizationMessages.WSP_0007_UNEXPECTED_MODEL_NODE_TYPE_FOUND(node.getType())));
aoqi@0:             }
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     private static ModelNode getReferencedModelRootNode(final ModelNode policyReferenceNode) throws PolicyException {
aoqi@0:         final PolicySourceModel referencedModel = policyReferenceNode.getReferencedModel();
aoqi@0:         if (referencedModel == null) {
aoqi@0:             final PolicyReferenceData refData = policyReferenceNode.getPolicyReferenceData();
aoqi@0:             if (refData == null) {
aoqi@0:                 throw LOGGER.logSevereException(new PolicyException(LocalizationMessages.WSP_0041_POLICY_REFERENCE_NODE_FOUND_WITH_NO_POLICY_REFERENCE_IN_IT()));
aoqi@0:             } else {
aoqi@0:                 throw LOGGER.logSevereException(new PolicyException(LocalizationMessages.WSP_0010_UNEXPANDED_POLICY_REFERENCE_NODE_FOUND_REFERENCING(refData.getReferencedModelUri())));
aoqi@0:             }
aoqi@0:         } else {
aoqi@0:             return referencedModel.getRootNode();
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Expands content of 'EXACTLY_ONE' node. Direct 'EXACTLY_ONE' child nodes are dissolved in the process.
aoqi@0:      */
aoqi@0:     private Collection<ModelNode> expandsExactlyOneContent(final Collection<ModelNode> content) throws PolicyException {
aoqi@0:         final Collection<ModelNode> result = new LinkedList<ModelNode>();
aoqi@0: 
aoqi@0:         final Queue<ModelNode> eoContentQueue = new LinkedList<ModelNode>(content);
aoqi@0:         ModelNode node;
aoqi@0:         while ((node = eoContentQueue.poll()) != null) {
aoqi@0:             // dissolving direct 'EXACTLY_ONE' child nodes
aoqi@0:             switch (node.getType()) {
aoqi@0:                 case POLICY :
aoqi@0:                 case ALL :
aoqi@0:                 case ASSERTION :
aoqi@0:                     result.add(node);
aoqi@0:                     break;
aoqi@0:                 case POLICY_REFERENCE :
aoqi@0:                     result.add(getReferencedModelRootNode(node));
aoqi@0:                     break;
aoqi@0:                 case EXACTLY_ONE :
aoqi@0:                     eoContentQueue.addAll(node.getChildren());
aoqi@0:                     break;
aoqi@0:                 default :
aoqi@0:                     throw LOGGER.logSevereException(new PolicyException(LocalizationMessages.WSP_0001_UNSUPPORTED_MODEL_NODE_TYPE(node.getType())));
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         return result;
aoqi@0:     }
aoqi@0: 
aoqi@0:     private List<AssertionSet> normalizeRawAlternative(final RawAlternative alternative) throws AssertionCreationException, PolicyException {
aoqi@0:         final List<PolicyAssertion> normalizedContentBase = new LinkedList<PolicyAssertion>();
aoqi@0:         final Collection<List<PolicyAssertion>> normalizedContentOptions = new LinkedList<List<PolicyAssertion>>();
aoqi@0:         if (!alternative.nestedAssertions.isEmpty()) {
aoqi@0:             final Queue<RawAssertion> nestedAssertionsQueue = new LinkedList<RawAssertion>(alternative.nestedAssertions);
aoqi@0:             RawAssertion rawAssertion;
aoqi@0:             while((rawAssertion = nestedAssertionsQueue.poll()) != null) {
aoqi@0:                 final List<PolicyAssertion> normalized = normalizeRawAssertion(rawAssertion);
aoqi@0:                 // if there is only a single result, we can add it direclty to the content base collection
aoqi@0:                 // more elements in the result indicate that we will have to create combinations
aoqi@0:                 if (normalized.size() == 1) {
aoqi@0:                     normalizedContentBase.addAll(normalized);
aoqi@0:                 } else {
aoqi@0:                     normalizedContentOptions.add(normalized);
aoqi@0:                 }
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         final List<AssertionSet> options = new LinkedList<AssertionSet>();
aoqi@0:         if (normalizedContentOptions.isEmpty()) {
aoqi@0:             // we do not have any options to combine => returning this assertion
aoqi@0:             options.add(AssertionSet.createAssertionSet(normalizedContentBase));
aoqi@0:         } else {
aoqi@0:             // we have some options to combine => creating assertion options based on content combinations
aoqi@0:             final Collection<Collection<PolicyAssertion>> contentCombinations = PolicyUtils.Collections.combine(normalizedContentBase, normalizedContentOptions, true);
aoqi@0:             for (Collection<PolicyAssertion> contentOption : contentCombinations) {
aoqi@0:                 options.add(AssertionSet.createAssertionSet(contentOption));
aoqi@0:             }
aoqi@0:         }
aoqi@0:         return options;
aoqi@0:     }
aoqi@0: 
aoqi@0:     private List<PolicyAssertion> normalizeRawAssertion(final RawAssertion assertion) throws AssertionCreationException, PolicyException {
aoqi@0:         List<PolicyAssertion> parameters;
aoqi@0:         if (assertion.parameters.isEmpty()) {
aoqi@0:             parameters = null;
aoqi@0:         } else {
aoqi@0:             parameters = new ArrayList<PolicyAssertion>(assertion.parameters.size());
aoqi@0:             for (ModelNode parameterNode : assertion.parameters) {
aoqi@0:                 parameters.add(createPolicyAssertionParameter(parameterNode));
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         final List<AssertionSet> nestedAlternatives = new LinkedList<AssertionSet>();
aoqi@0:         if (assertion.nestedAlternatives != null && !assertion.nestedAlternatives.isEmpty()) {
aoqi@0:             final Queue<RawAlternative> nestedAlternativeQueue = new LinkedList<RawAlternative>(assertion.nestedAlternatives);
aoqi@0:             RawAlternative rawAlternative;
aoqi@0:             while((rawAlternative = nestedAlternativeQueue.poll()) != null) {
aoqi@0:                 nestedAlternatives.addAll(normalizeRawAlternative(rawAlternative));
aoqi@0:             }
aoqi@0:             // if there is only a single result, we can add it direclty to the content base collection
aoqi@0:             // more elements in the result indicate that we will have to create combinations
aoqi@0:         }
aoqi@0: 
aoqi@0:         final List<PolicyAssertion> assertionOptions = new LinkedList<PolicyAssertion>();
aoqi@0:         final boolean nestedAlternativesAvailable = !nestedAlternatives.isEmpty();
aoqi@0:         if (nestedAlternativesAvailable) {
aoqi@0:             for (AssertionSet nestedAlternative : nestedAlternatives) {
aoqi@0:                 assertionOptions.add(createPolicyAssertion(assertion.originalNode.getNodeData(), parameters, nestedAlternative));
aoqi@0:             }
aoqi@0:         } else {
aoqi@0:             assertionOptions.add(createPolicyAssertion(assertion.originalNode.getNodeData(), parameters, null));
aoqi@0:         }
aoqi@0:         return assertionOptions;
aoqi@0:     }
aoqi@0: 
aoqi@0:     private PolicyAssertion createPolicyAssertionParameter(final ModelNode parameterNode) throws AssertionCreationException, PolicyException {
aoqi@0:         if (parameterNode.getType() != ModelNode.Type.ASSERTION_PARAMETER_NODE) {
aoqi@0:             throw LOGGER.logSevereException(new PolicyException(LocalizationMessages.WSP_0065_INCONSISTENCY_IN_POLICY_SOURCE_MODEL(parameterNode.getType())));
aoqi@0:         }
aoqi@0: 
aoqi@0:         List<PolicyAssertion> childParameters = null;
aoqi@0:         if (parameterNode.hasChildren()) {
aoqi@0:             childParameters = new ArrayList<PolicyAssertion>(parameterNode.childrenSize());
aoqi@0:             for (ModelNode childParameterNode : parameterNode) {
aoqi@0:                 childParameters.add(createPolicyAssertionParameter(childParameterNode));
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         return createPolicyAssertion(parameterNode.getNodeData(), childParameters, null /* parameters do not have any nested alternatives */);
aoqi@0:     }
aoqi@0: 
aoqi@0:     private PolicyAssertion createPolicyAssertion(final AssertionData data, final Collection<PolicyAssertion> assertionParameters, final AssertionSet nestedAlternative) throws AssertionCreationException {
aoqi@0:         final String assertionNamespace = data.getName().getNamespaceURI();
aoqi@0:         final PolicyAssertionCreator domainSpecificPAC = assertionCreators.get(assertionNamespace);
aoqi@0: 
aoqi@0: 
aoqi@0:         if (domainSpecificPAC == null) {
aoqi@0:             return defaultCreator.createAssertion(data, assertionParameters, nestedAlternative, null);
aoqi@0:         } else {
aoqi@0:             return domainSpecificPAC.createAssertion(data, assertionParameters, nestedAlternative, defaultCreator);
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0: }