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Diffstat (limited to '')
-rw-r--r-- | sca-java-2.x/tags/2.0-Beta1-RC1/modules/builder/src/main/java/org/apache/tuscany/sca/builder/impl/PolicyAppliesToBuilderImpl.java | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/sca-java-2.x/tags/2.0-Beta1-RC1/modules/builder/src/main/java/org/apache/tuscany/sca/builder/impl/PolicyAppliesToBuilderImpl.java b/sca-java-2.x/tags/2.0-Beta1-RC1/modules/builder/src/main/java/org/apache/tuscany/sca/builder/impl/PolicyAppliesToBuilderImpl.java deleted file mode 100644 index 2417940b1c..0000000000 --- a/sca-java-2.x/tags/2.0-Beta1-RC1/modules/builder/src/main/java/org/apache/tuscany/sca/builder/impl/PolicyAppliesToBuilderImpl.java +++ /dev/null @@ -1,171 +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.builder.impl; - - -import java.util.ArrayList; -import java.util.HashMap; -import java.util.List; -import java.util.Map; - -import javax.xml.xpath.XPathConstants; -import javax.xml.xpath.XPathExpression; - -import org.apache.tuscany.sca.assembly.Component; -import org.apache.tuscany.sca.assembly.ComponentReference; -import org.apache.tuscany.sca.assembly.ComponentService; -import org.apache.tuscany.sca.assembly.Composite; -import org.apache.tuscany.sca.assembly.Endpoint; -import org.apache.tuscany.sca.assembly.EndpointReference; -import org.apache.tuscany.sca.assembly.Implementation; -import org.apache.tuscany.sca.assembly.builder.BuilderContext; -import org.apache.tuscany.sca.assembly.builder.CompositeBuilderException; - -import org.apache.tuscany.sca.core.ExtensionPointRegistry; -import org.apache.tuscany.sca.policy.PolicySet; -import org.apache.tuscany.sca.policy.PolicySubject; -import org.w3c.dom.Document; -import org.w3c.dom.Node; -import org.w3c.dom.NodeList; - -/** - * A builder that checks that policy sets apply to the elements to which they are attached. - * Any that don't are removed. It first creates a DOM model for the composite so that the xpath - * expression can be evaluated. For each element that holds a policy set is calculates the - * appliesTo nodes and checks that the current element is in the set. If not the policySet is - * removed from the element - * - * @version $Rev$ $Date$ - */ -public class PolicyAppliesToBuilderImpl extends PolicyAttachmentBuilderImpl { - - public PolicyAppliesToBuilderImpl(ExtensionPointRegistry registry) { - super(registry); - } - - public String getID() { - return "org.apache.tuscany.sca.policy.builder.PolicyAppliesToBuilder"; - } - - public Composite build(Composite composite, BuilderContext context) - throws CompositeBuilderException { - try { - // create a DOM for the Domain Composite Infoset - Document document = saveAsDOM(composite); - - // create a cache of evaluated node against each policy set so we don't - // have to keep evaluating policy sets that appear in multiple places - Map<PolicySet, List<PolicySubject>> appliesToSubjects = new HashMap<PolicySet, List<PolicySubject>>(); - - // for all implementations, endpoint and endpoint references check that - // the policy sets validly apply - return checkAppliesTo(document, appliesToSubjects, composite, context); - - } catch (Exception e) { - throw new CompositeBuilderException(e); - } - } - - private Composite checkAppliesTo(Document document, Map<PolicySet, List<PolicySubject>> appliesToSubjects, Composite composite, BuilderContext context) throws Exception { - // look at policies recursively - for (Component component : composite.getComponents()) { - Implementation implementation = component.getImplementation(); - if (implementation instanceof Composite) { - checkAppliesTo(document, appliesToSubjects, (Composite)implementation, context); - } - } - - for (Component component : composite.getComponents()) { - - for (ComponentService componentService : component.getServices()) { - for (Endpoint ep : componentService.getEndpoints()) { - if (ep.getBinding() instanceof PolicySubject) { - checkAppliesToSubject(document, appliesToSubjects, composite, (PolicySubject)ep.getBinding(), ep.getPolicySets()); - } - } - } - - for (ComponentReference componentReference : component.getReferences()) { - for (EndpointReference epr : componentReference.getEndpointReferences()) { - if (epr.getBinding() instanceof PolicySubject) { - checkAppliesToSubject(document, appliesToSubjects, composite, (PolicySubject)epr.getBinding(), epr.getPolicySets()); - } - } - } - - Implementation implementation = component.getImplementation(); - if (implementation != null && - implementation instanceof PolicySubject) { - checkAppliesToSubject(document, appliesToSubjects, composite, implementation, implementation.getPolicySets()); - } - } - - return composite; - } - - /** - * Checks that all the provided policy sets apply to the provided policy subject - * - * @param document - * @param appliesToSubjects - * @param policySubject - * @param policySets - * @return - * @throws Exception - */ - private void checkAppliesToSubject(Document document, Map<PolicySet, List<PolicySubject>> appliesToSubjects, Composite composite, PolicySubject policySubject, List<PolicySet> policySets) throws Exception { - List<PolicySet> policySetsToRemove = new ArrayList<PolicySet>(); - - for (PolicySet policySet : policySets){ - List<PolicySubject> subjects = appliesToSubjects.get(policySet); - - if (subjects == null){ - XPathExpression appliesTo = policySet.getAppliesToXPathExpression(); - if (appliesTo != null) { - NodeList nodes = (NodeList)appliesTo.evaluate(document, XPathConstants.NODESET); - - if (nodes.getLength() > 0){ - subjects = new ArrayList<PolicySubject>(); - appliesToSubjects.put(policySet, subjects); - } - - for (int i = 0; i < nodes.getLength(); i++) { - Node node = nodes.item(i); - String index = getStructuralURI(node); - PolicySubject subject = lookup(composite, index); - subjects.add(subject); - } - } - } - - if (subjects != null){ - if (!subjects.contains(policySubject)){ - policySetsToRemove.add(policySet); - } - } - - // TODO - If no "appliesTo" is provided does the policy set apply to - // everything or nothing? - - } - - policySets.removeAll(policySetsToRemove); - } -} |