diff options
Diffstat (limited to 'sca-java-2.x/tags/2.0.1-RC1/modules/policy-wspolicy/src/main/java/org/apache/tuscany/sca/policy')
3 files changed, 437 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/policy-wspolicy/src/main/java/org/apache/tuscany/sca/policy/wspolicy/WSPolicy.java b/sca-java-2.x/tags/2.0.1-RC1/modules/policy-wspolicy/src/main/java/org/apache/tuscany/sca/policy/wspolicy/WSPolicy.java new file mode 100644 index 0000000000..6938b72d82 --- /dev/null +++ b/sca-java-2.x/tags/2.0.1-RC1/modules/policy-wspolicy/src/main/java/org/apache/tuscany/sca/policy/wspolicy/WSPolicy.java @@ -0,0 +1,74 @@ +/* + * 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.wspolicy; + +import java.util.ArrayList; +import java.util.List; + +import javax.xml.namespace.QName; + +import org.apache.neethi.Policy; +import org.apache.tuscany.sca.policy.PolicyContainer; + +/** + * The WS-Policy model. Currently defers to the Neethi policy model under the covers. + */ +public class WSPolicy implements PolicyContainer { + + public final static String WS_POLICY_NS = "http://schemas.xmlsoap.org/ws/2004/09/policy"; + public final static String WS_POLICY = "Policy"; + + public final static QName WS_POLICY_QNAME = new QName(WS_POLICY_NS, WS_POLICY); + + private Policy neethiPolicy; + private List<Object> policyAssertions = new ArrayList<Object>(); + + public QName getSchemaName() { + return WS_POLICY_QNAME; + } + + public Policy getNeethiPolicy() { + return neethiPolicy; + } + + public void setNeethiPolicy(Policy neethiPolicy) { + this.neethiPolicy = neethiPolicy; + } + + public List<Object> getPolicyAssertions(){ + return policyAssertions; + } + + @Override + public String toString() { + return "WSPolicy [" + neethiPolicy + "]"; + } + + public <T> Object getChildPolicy(Class<T> policyType) { + for (Object alternative : policyAssertions){ + for (Object policy : (List<Object>)alternative){ + if (policyType.isInstance(policy)){ + return policy; + } + } + } + return null; + } +} diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/policy-wspolicy/src/main/java/org/apache/tuscany/sca/policy/wspolicy/WSPolicyBuilder.java b/sca-java-2.x/tags/2.0.1-RC1/modules/policy-wspolicy/src/main/java/org/apache/tuscany/sca/policy/wspolicy/WSPolicyBuilder.java new file mode 100644 index 0000000000..d6bd710ed9 --- /dev/null +++ b/sca-java-2.x/tags/2.0.1-RC1/modules/policy-wspolicy/src/main/java/org/apache/tuscany/sca/policy/wspolicy/WSPolicyBuilder.java @@ -0,0 +1,173 @@ +/* + * 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.wspolicy; + +import java.util.ArrayList; +import java.util.List; + +import javax.xml.namespace.QName; + +import org.apache.neethi.Policy; +import org.apache.tuscany.sca.assembly.Component; +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.PolicyBuilder; +import org.apache.tuscany.sca.policy.PolicyExpression; +import org.apache.tuscany.sca.policy.PolicySet; +import org.apache.tuscany.sca.policy.PolicySubject; + +/** + * Processing for WS-Policy objects + * TBD + */ +public class WSPolicyBuilder implements PolicyBuilder<Policy> { + + public boolean build(Endpoint endpoint, BuilderContext context) { + List<WSPolicy> polices = getPolicies(endpoint); + System.out.println(endpoint + ": " + polices); + return true; + } + + public boolean build(EndpointReference endpointReference, BuilderContext context) { + List<WSPolicy> polices = getPolicies(endpointReference); + System.out.println(endpointReference + ": " + polices); + return true; + } + + public boolean build(Component component, Implementation implementation, BuilderContext context) { + List<WSPolicy> polices = getPolicies(implementation); + System.out.println(implementation + ": " + polices); + return true; + } + + public QName getPolicyType() { + return WSPolicy.WS_POLICY_QNAME; + } + + public List<QName> getSupportedBindings() { + return null; + } + + public boolean build(EndpointReference endpointReference, Endpoint endpoint, BuilderContext context) { + + // TODO - neethi doesn't include code for matching ws policy + // cxf have the class Intersector http://svn.apache.org/repos/asf/cxf/trunk/api/src/main/java/org/apache/cxf/ws/policy/Intersector.java + // but this does its work based on the cxf AssertionBuilders and extension + // registry mechanism. I don't want to commit to that at the moment. + // + // At the moment we do the simplest top level QName based matching + + // match EPR policy sets + for (PolicySet eprPolicySet : endpointReference.getPolicySets()){ + for (PolicySet epPolicySet : endpoint.getPolicySets()){ + if (!build(eprPolicySet, epPolicySet)){ + return false; + } + } + } + + // match EP policy sets + for (PolicySet epPolicySet : endpoint.getPolicySets()){ + for (PolicySet eprPolicySet : endpointReference.getPolicySets()){ + if (!build(epPolicySet, eprPolicySet)){ + return false; + } + } + } + + return true; + } + + private boolean build(PolicySet policySet1, PolicySet policySet2){ + + // extract the ws policy expressions out of the policy sets + List<PolicyExpression> policyExpressions1 = new ArrayList<PolicyExpression>(); + List<PolicyExpression> policyExpressions2 = new ArrayList<PolicyExpression>(); + + for (PolicyExpression policyExpression : policySet1.getPolicies()){ + if (policyExpression.getName().equals(getPolicyType())){ + policyExpressions1.add(policyExpression); + } + } + + for (PolicyExpression policyExpression : policySet2.getPolicies()){ + if (policyExpression.getName().equals(getPolicyType())){ + policyExpressions2.add(policyExpression); + } + } + + // Match the first set of expressions against the second set + for (PolicyExpression policyExpression1 : policyExpressions1){ + for (PolicyExpression policyExpression2 : policyExpressions2){ + if (!build((WSPolicy)policyExpression1.getPolicy(), + (WSPolicy)policyExpression2.getPolicy())){ + return false; + } + } + } + + // TODO set the reference policy set to include an interception of the + // ws policy sets discovered here + // Do we really need to do this? + // The method is called in both directions (reference to service and + // service to reference) so would need to fix that + + return true; + } + + private List<WSPolicy> getPolicies(PolicySubject subject) { + List<WSPolicy> polices = new ArrayList<WSPolicy>(); + for (PolicySet ps : subject.getPolicySets()) { + for (PolicyExpression exp : ps.getPolicies()) { + if (getPolicyType().equals(exp.getName())) { + polices.add((WSPolicy)exp.getPolicy()); + } + } + } + return polices; + } + + private boolean build(WSPolicy wsPolicy1, WSPolicy wsPolicy2){ + // TODO - cheating here as we assume a flat policy structure + // we've read all the policy assertions into Tuscany models + // in the reader (without taking account of alternatives) + // so we just compare those here + // The real implementation of this comparison depends on how + // we decide to represent the ws policy hierarchy + + for (Object policyAssertion1 : wsPolicy1.getPolicyAssertions()){ + boolean matched = false; + for (Object policyAssertion2 : wsPolicy2.getPolicyAssertions()){ + if (policyAssertion1.getClass() == policyAssertion2.getClass()){ + matched = true; + break; + } + } + if(!matched){ + return false; + } + } + + return true; + } + +} diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/policy-wspolicy/src/main/java/org/apache/tuscany/sca/policy/wspolicy/xml/WSPolicyProcessor.java b/sca-java-2.x/tags/2.0.1-RC1/modules/policy-wspolicy/src/main/java/org/apache/tuscany/sca/policy/wspolicy/xml/WSPolicyProcessor.java new file mode 100644 index 0000000000..cbc234bc47 --- /dev/null +++ b/sca-java-2.x/tags/2.0.1-RC1/modules/policy-wspolicy/src/main/java/org/apache/tuscany/sca/policy/wspolicy/xml/WSPolicyProcessor.java @@ -0,0 +1,190 @@ +/* + * 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.wspolicy.xml; + +import java.io.ByteArrayInputStream; +import java.io.ByteArrayOutputStream; +import java.util.ArrayList; +import java.util.List; + +import javax.xml.namespace.QName; +import javax.xml.stream.XMLInputFactory; +import javax.xml.stream.XMLOutputFactory; +import javax.xml.stream.XMLStreamException; +import javax.xml.stream.XMLStreamReader; +import javax.xml.stream.XMLStreamWriter; + +import org.apache.axiom.om.OMElement; +import org.apache.axiom.om.impl.builder.StAXOMBuilder; +import org.apache.neethi.Constants; +import org.apache.neethi.PolicyComponent; +import org.apache.neethi.PolicyEngine; +import org.apache.neethi.PolicyOperator; +import org.apache.tuscany.sca.common.xml.stax.reader.XMLDocumentStreamReader; +import org.apache.tuscany.sca.contribution.processor.BaseStAXArtifactProcessor; +import org.apache.tuscany.sca.contribution.processor.ContributionReadException; +import org.apache.tuscany.sca.contribution.processor.ContributionResolveException; +import org.apache.tuscany.sca.contribution.processor.ContributionWriteException; +import org.apache.tuscany.sca.contribution.processor.ProcessorContext; +import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor; +import org.apache.tuscany.sca.contribution.processor.StAXAttributeProcessor; +import org.apache.tuscany.sca.contribution.resolver.ModelResolver; +import org.apache.tuscany.sca.core.ExtensionPointRegistry; +import org.apache.tuscany.sca.core.FactoryExtensionPoint; +import org.apache.tuscany.sca.policy.wspolicy.WSPolicy; + +/** + * Processor for handling xml models of PolicySet definitions + * + * @version $Rev$ $Date$ + */ +public class WSPolicyProcessor extends BaseStAXArtifactProcessor implements + StAXArtifactProcessor<WSPolicy> { + + protected ExtensionPointRegistry registry; + protected StAXArtifactProcessor<Object> extensionProcessor; + protected StAXAttributeProcessor<Object> extensionAttributeProcessor; + protected XMLInputFactory inputFactory; + protected XMLOutputFactory outputFactory; + + public WSPolicyProcessor(ExtensionPointRegistry registry, + StAXArtifactProcessor extensionProcessor, + StAXAttributeProcessor extensionAttributeProcessor) { + this.registry = registry; + this.extensionProcessor = extensionProcessor; + this.extensionAttributeProcessor = extensionAttributeProcessor; + + FactoryExtensionPoint modelFactories = registry.getExtensionPoint(FactoryExtensionPoint.class); + this.inputFactory = modelFactories.getFactory(XMLInputFactory.class); + this.outputFactory = modelFactories.getFactory(XMLOutputFactory.class); + } + + public QName getArtifactType() { + return WSPolicy.WS_POLICY_QNAME; + } + + public Class<WSPolicy> getModelType() { + return WSPolicy.class; + } + + public WSPolicy read(XMLStreamReader reader, ProcessorContext context) + throws ContributionReadException, XMLStreamException { + org.apache.neethi.Policy neethiPolicy = null; + XMLDocumentStreamReader doc = new XMLDocumentStreamReader(reader); + StAXOMBuilder builder = new StAXOMBuilder(doc); + OMElement element = builder.getDocumentElement(); + neethiPolicy = PolicyEngine.getPolicy(element); + + WSPolicy wsPolicy = new WSPolicy(); + wsPolicy.setNeethiPolicy(neethiPolicy); + + // normalize the neethi tree so we can easily identify + // the policy alternatives +/* Messes up the hierarchy if rampart config policies included + try { + neethiPolicy.normalize(true); + } catch (UnsupportedOperationException ex){ + // RampartConfig policies don't support this yet + } +*/ + + // top-level children of ExactlyOne are policy alternatives so + // for each child create a policy model list and pull the + // policies out + for(Object alternative : neethiPolicy.getPolicyComponents()) { + List<Object> assertions = new ArrayList<Object>(); + readPolicyAssertions(assertions, (PolicyComponent)alternative, context); + wsPolicy.getPolicyAssertions().add(assertions); + } + + + return wsPolicy; + } + + private void readPolicyAssertions(List<Object> policyAssertions, PolicyComponent policyComponent, ProcessorContext context){ + + // recurse into the policy alternatives + // TODO - lots of todos here as this just walks down the neethi hierarchy + // looking for assertions to drive Tuscany processors without + // regard to the policy alternatives. Undecided about whether to + // commit to prepresenting this hierarchy in Tuscany or whether + // to rely on neethi + // Should this be in the builder? Not really as this drives the + // Tuscany specific readers + if (policyComponent.getType() != Constants.TYPE_ASSERTION){ + PolicyOperator policyOperator = (PolicyOperator)policyComponent; + for(Object childComponent : policyOperator.getPolicyComponents()){ + // TODO - create assertion hierarchy in wsPolicy model + // how we do this depends on if we continue to use neethi + readPolicyAssertions(policyAssertions, (PolicyComponent)childComponent, context); + } + } else { + try { + // TODO - not sure we should keep the neethi model but hack for the + // time being to get Tuscany processors to process the OMElements + // within the neethi model + ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); + XMLStreamWriter writer = outputFactory.createXMLStreamWriter(outputStream); + + policyComponent.serialize(writer); + writer.flush(); + writer.close(); + outputStream.flush(); + outputStream.close(); + + ByteArrayInputStream inputStream = new ByteArrayInputStream(outputStream.toByteArray()); + XMLStreamReader reader = inputFactory.createXMLStreamReader(inputStream); + + Object neethiAssertion = policyComponent; + Object tuscanyAssertion = extensionProcessor.read(reader, context); + + if (tuscanyAssertion != null) { + policyAssertions.add(tuscanyAssertion); + } else { + // add neethi assertion + policyAssertions.add(neethiAssertion); + } + } catch (Exception ex) { + // TODO - report the error properly + ex.printStackTrace(); + } + } + } + + public void write(WSPolicy wsPolicy, XMLStreamWriter writer, ProcessorContext context) + throws ContributionWriteException, XMLStreamException { + + // Write an <sca:policySet> + writer.writeStartElement(WSPolicy.WS_POLICY_NS, WSPolicy.WS_POLICY); + + if (wsPolicy != null) { + wsPolicy.getNeethiPolicy().serialize(writer); + } + + writer.writeEndElement(); + } + + public void resolve(WSPolicy wsPolicy, ModelResolver resolver, ProcessorContext context) + throws ContributionResolveException { + + // resolve policy assertions + } + +} |