diff options
author | antelder <antelder@13f79535-47bb-0310-9956-ffa450edef68> | 2009-03-23 07:58:24 +0000 |
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committer | antelder <antelder@13f79535-47bb-0310-9956-ffa450edef68> | 2009-03-23 07:58:24 +0000 |
commit | 25ecf5fd25c607f964959e562a8ebb4c211fe5b2 (patch) | |
tree | 6e431306924752a83a5c4c0174cfc1cbea7fb6d0 /sandbox/ant/sca/trunk/modules/policy/src/main/java/org/apache/tuscany/sca/policy/util/PolicyComputationUtils.java | |
parent | d2a69e96416b2d8380743e443cebc03c87c6bf3c (diff) |
Remove old testing sandbox sca trunk
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@757342 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'sandbox/ant/sca/trunk/modules/policy/src/main/java/org/apache/tuscany/sca/policy/util/PolicyComputationUtils.java')
-rw-r--r-- | sandbox/ant/sca/trunk/modules/policy/src/main/java/org/apache/tuscany/sca/policy/util/PolicyComputationUtils.java | 370 |
1 files changed, 0 insertions, 370 deletions
diff --git a/sandbox/ant/sca/trunk/modules/policy/src/main/java/org/apache/tuscany/sca/policy/util/PolicyComputationUtils.java b/sandbox/ant/sca/trunk/modules/policy/src/main/java/org/apache/tuscany/sca/policy/util/PolicyComputationUtils.java deleted file mode 100644 index fe61ce707c..0000000000 --- a/sandbox/ant/sca/trunk/modules/policy/src/main/java/org/apache/tuscany/sca/policy/util/PolicyComputationUtils.java +++ /dev/null @@ -1,370 +0,0 @@ -/* - * Licensed to the Apache Software Foundation (ASF) under one - * or more contributor license agreements. See the NOTICE file - * distributed with this work for additional information - * regarding copyright ownership. The ASF licenses this file - * to you under the Apache License, Version 2.0 (the - * "License"); you may not use this file except in compliance - * with the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, - * software distributed under the License is distributed on an - * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY - * KIND, either express or implied. See the License for the - * specific language governing permissions and limitations - * under the License. - */ - -package org.apache.tuscany.sca.policy.util; - -import static javax.xml.XMLConstants.XMLNS_ATTRIBUTE_NS_URI; - -import java.io.InputStream; -import java.io.StringWriter; -import java.security.AccessController; -import java.security.PrivilegedActionException; -import java.security.PrivilegedExceptionAction; -import java.util.ArrayList; -import java.util.Collection; -import java.util.HashMap; -import java.util.Iterator; -import java.util.List; -import java.util.Map; - -import javax.xml.namespace.NamespaceContext; -import javax.xml.parsers.DocumentBuilder; -import javax.xml.parsers.DocumentBuilderFactory; -import javax.xml.transform.Result; -import javax.xml.transform.Source; -import javax.xml.transform.Transformer; -import javax.xml.transform.TransformerConfigurationException; -import javax.xml.transform.TransformerException; -import javax.xml.transform.TransformerFactory; -import javax.xml.transform.dom.DOMSource; -import javax.xml.transform.stream.StreamResult; -import javax.xml.xpath.XPathConstants; -import javax.xml.xpath.XPathExpression; -import javax.xml.xpath.XPathExpressionException; - -import org.apache.tuscany.sca.policy.ExtensionType; -import org.apache.tuscany.sca.policy.Intent; -import org.apache.tuscany.sca.policy.PolicySet; -import org.w3c.dom.Document; -import org.w3c.dom.Element; -import org.w3c.dom.Node; -import org.w3c.dom.NodeList; - -/** - * Utility methods used during computation of PolicyIntents and PolicySets sets - * - * @version $Rev$ $Date$ - */ -public class PolicyComputationUtils { - private static final String POLICYSET_PREFIX = "tp_"; - private static final String APPLICABLE_POLICYSET_ATTR_NS = "http://tuscany.apache.org/xmlns/sca/1.1"; - private static final String APPLICABLE_POLICYSET_ATTR = "applicablePolicySets"; - private static final String POLICY_SETS_ATTR = "policySets"; - private static final String APPLICABLE_POLICYSET_ATTR_PREFIX = "tuscany"; - private static final String SCA11_NS = "http://docs.oasis-open.org/ns/opencsa/sca/200903"; - - /** - * This method unconditionally adds intents from the source list to the target list. - * It is used for intermediate intent inheritance between promotion levels - * (e.g. between a composite service and a component service). It does not check - * whether there are conflicting (mutually exclusive) intents. This is because - * promotion cannot override intents. If the resulting target list has conflicting - * intents, this will be detected later during policy computation. - */ - public static void addInheritedIntents(List<Intent> sourceList, List<Intent> targetList) { - if (sourceList != null) { - targetList.addAll(sourceList); - } - } - - public static void addInheritedPolicySets(List<PolicySet> sourceList, - List<PolicySet> targetList, - boolean checkOverrides) { - // check overrides is true when policysets are to be copied from - // componentType to component level - if (checkOverrides) { - // aggregate all the provided intents present in the target - List<Intent> targetProvidedIntents = new ArrayList<Intent>(); - for (PolicySet policySet : targetList) { - targetProvidedIntents.addAll(policySet.getProvidedIntents()); - } - - // for every policy set in the source check if it provides one of - // the intents that is - // already provided by the policysets in the destination and do not - // copy them. - for (PolicySet policySet : sourceList) { - for (Intent sourceProvidedIntent : policySet.getProvidedIntents()) { - if (!targetProvidedIntents.contains(sourceProvidedIntent)) { - targetList.add(policySet); - } - } - } - } else { - targetList.addAll(sourceList); - } - } - - /** - * This method is used to inherit intents and policy sets between hierarchical levels - * within the same composite (e.g. between a component and its services and references). - * In this case the source intents and policy sets provide defaults which are inherited - * into the target lists only when there is no conflict. For example consider a component - * with 3 references. The component level requires intent 'propagatesTransaction'. - * Reference 1 and 2 do not specify an intent, but reference 3 requires 'suspendsTransaction'. - * In this case the 'propagatesTransaction' intent is inherited by reference 1 and 2 - * but not by reference 3. - */ - public static void addDefaultPolicies(List<Intent> sourceIntents, - List<PolicySet> sourcePolicySets, - List<Intent> targetIntents, - List<PolicySet> targetPolicySets) { - // form a list of all intents required by the target - List<Intent> combinedTargetIntents = new ArrayList<Intent>(); - combinedTargetIntents.addAll(findAndExpandProfileIntents(targetIntents)); - for (PolicySet targetPolicySet : targetPolicySets) { - combinedTargetIntents.addAll(findAndExpandProfileIntents(targetPolicySet.getProvidedIntents())); - } - - // inherit intents in the source list that do not conflict with intents already in the target list - for (Intent sourceIntent : findAndExpandProfileIntents(sourceIntents)) { - boolean conflict = false; - for (Intent excluded : sourceIntent.getExcludedIntents()) { - if (combinedTargetIntents.contains(excluded)) { - conflict = true; - break; - } - } - if (!conflict) { - targetIntents.add(sourceIntent); - } - } - - // inherit policy sets in the source list that do not conflict with policy sets or intents - // in the target list - for (PolicySet sourcePolicySet : sourcePolicySets) { - boolean conflict = false; - List<Intent> providedIntents = findAndExpandProfileIntents(sourcePolicySet.getProvidedIntents()); - checkConflict: for (Intent intent : providedIntents) { - for (Intent excluded : intent.getExcludedIntents()) { - if (combinedTargetIntents.contains(excluded)) { - conflict = true; - break checkConflict; - } - } - } - if (!conflict) - targetPolicySets.add(sourcePolicySet); - } - - } - - public static void checkForMutuallyExclusiveIntents(List<Intent> intents, - List<PolicySet> policySets, - ExtensionType intentAttachPointType, - String id) throws PolicyValidationException { - // gather all intents (keeping track of where they come from) - Map<Intent, PolicySet> combinedIntents = new HashMap<Intent, PolicySet>(); - for (PolicySet policySet : policySets) { - for (Intent providedIntent : findAndExpandProfileIntents(policySet.getProvidedIntents())) { - combinedIntents.put(providedIntent, policySet); - } - } - for (Intent intent : intents) { - combinedIntents.put(intent, null); - } - - // check for conflicts - for (Intent intent : combinedIntents.keySet()) { - for (Intent excluded : intent.getExcludedIntents()) { - if (combinedIntents.keySet().contains(excluded)) { - String sIntent1, sIntent2; - if (combinedIntents.get(intent) == null) - sIntent1 = intent.getName().toString(); - else - sIntent1 = - intent.getName().toString() + " in policy set " - + combinedIntents.get(intent).getName().toString(); - if (combinedIntents.get(excluded) == null) - sIntent2 = excluded.getName().toString(); - else - sIntent2 = - excluded.getName().toString() + " in policy set " - + combinedIntents.get(excluded).getName().toString(); - throw new PolicyValidationException(intentAttachPointType.getType() + " for " - + id - + " uses mutually-exclusive intents " - + sIntent1 - + " and " - + sIntent2); - } - } - } - } - - public static void expandProfileIntents(List<Intent> intents) { - List<Intent> expandedIntents = null; - if (intents.size() > 0) { - expandedIntents = findAndExpandProfileIntents(intents); - intents.clear(); - intents.addAll(expandedIntents); - } - } - - public static List<Intent> findAndExpandProfileIntents(List<Intent> intents) { - List<Intent> expandedIntents = new ArrayList<Intent>(); - for (Intent intent : intents) { - if (!intent.getRequiredIntents().isEmpty()) { - List<Intent> requiredIntents = intent.getRequiredIntents(); - expandedIntents.addAll(findAndExpandProfileIntents(requiredIntents)); - } else { - expandedIntents.add(intent); - } - } - return expandedIntents; - } - - private static byte[] addApplicablePolicySets(Document doc, Collection<PolicySet> policySets) - throws XPathExpressionException, TransformerConfigurationException, TransformerException { - - for (PolicySet policySet : policySets) { - if (policySet.getAppliesTo() != null) { - addApplicablePolicySets(policySet, doc); - } - } - - StringWriter sw = new StringWriter(); - final Source domSource = new DOMSource(doc); - final Result finalResult = new StreamResult(sw); - final Transformer transformer = TransformerFactory.newInstance().newTransformer(); - // transformer.setOutputProperty("omit-xml-declaration", "yes"); - // Allow priviledged access to let transformers read property files. Requires - // PropertyPermission in security policy. - try { - AccessController.doPrivileged(new PrivilegedExceptionAction<Object>() { - public Object run() throws TransformerException { - transformer.transform(domSource, finalResult); - return null; - } - }); - } catch (PrivilegedActionException e) { - throw (TransformerException)e.getException(); - } - - return sw.toString().getBytes(); - } - - private static void addApplicablePolicySets(PolicySet policySet, Document doc) throws XPathExpressionException { - XPathExpression expression = policySet.getAppliesToXPathExpression(); - NodeList result = (NodeList)expression.evaluate(doc, XPathConstants.NODESET); - - if (result != null) { - for (int counter = 0; counter < result.getLength(); ++counter) { - Node aResultNode = result.item(counter); - - String applicablePolicySets = null; - - String policySetPrefix = declareNamespace((Element)aResultNode, policySet.getName().getNamespaceURI()); - String appPolicyAttrPrefix = declareNamespace((Element)aResultNode, APPLICABLE_POLICYSET_ATTR_NS); - if (aResultNode.getAttributes().getNamedItemNS(APPLICABLE_POLICYSET_ATTR_NS, APPLICABLE_POLICYSET_ATTR) != null) { - applicablePolicySets = - aResultNode.getAttributes().getNamedItemNS(APPLICABLE_POLICYSET_ATTR_NS, - APPLICABLE_POLICYSET_ATTR).getNodeValue(); - } - - if (applicablePolicySets != null && applicablePolicySets.length() > 0) { - applicablePolicySets = - applicablePolicySets + " " + policySetPrefix + ":" + policySet.getName().getLocalPart(); - } else { - applicablePolicySets = policySetPrefix + ":" + policySet.getName().getLocalPart(); - } - - ((Element)aResultNode).setAttributeNS(APPLICABLE_POLICYSET_ATTR_NS, appPolicyAttrPrefix + ":" - + APPLICABLE_POLICYSET_ATTR, applicablePolicySets); - } - } - } - - public static byte[] addApplicablePolicySets(InputStream is, - Collection<PolicySet> domainPolicySets, - DocumentBuilderFactory documentBuilderFactory) throws Exception { - documentBuilderFactory.setNamespaceAware(true); - DocumentBuilder db = documentBuilderFactory.newDocumentBuilder(); - Document doc = db.parse(is); - is.close(); - return addApplicablePolicySets(doc, domainPolicySets); - } - - private static class DOMNamespaceContext implements NamespaceContext { - private Node node; - - /** - * @param node - */ - public DOMNamespaceContext(Node node) { - super(); - this.node = node; - } - - public String getNamespaceURI(String prefix) { - return node.lookupNamespaceURI(prefix); - } - - public String getPrefix(String namespaceURI) { - return node.lookupPrefix(namespaceURI); - } - - public Iterator<?> getPrefixes(String namespaceURI) { - return null; - } - - } - - private static String declareNamespace(Element element, String ns) { - if (ns == null) { - ns = ""; - } - Node node = element; - String prefix = ""; - boolean declared = false; - while (node != null && node.getNodeType() == Node.ELEMENT_NODE) { - if (node.lookupPrefix(ns) != null) { - prefix = node.lookupPrefix(ns); - declared = true; - break; - } else { - /*NamedNodeMap attrs = node.getAttributes(); - if (attrs == null) { - break; - } - Node attr = attrs.getNamedItem(qname); - if (attr != null) { - declared = ns.equals(attr.getNodeValue()); - break; - }*/ - node = node.getParentNode(); - } - } - if (!declared) { - // Find an available prefix - for (int i = 1;; i++) { - prefix = POLICYSET_PREFIX + i; - if (element.lookupNamespaceURI(prefix) == null) { - break; - } - } - String qname = "xmlns:" + prefix; - org.w3c.dom.Attr attr = element.getOwnerDocument().createAttributeNS(XMLNS_ATTRIBUTE_NS_URI, qname); - attr.setValue(ns); - element.setAttributeNodeNS(attr); - } - return prefix; - } - -} |