diff options
Diffstat (limited to 'sca-java-2.x/tags/2.0.1-RC1/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/BasePolicyProvider.java')
| -rw-r--r-- | sca-java-2.x/tags/2.0.1-RC1/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/BasePolicyProvider.java | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/BasePolicyProvider.java b/sca-java-2.x/tags/2.0.1-RC1/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/BasePolicyProvider.java new file mode 100644 index 0000000000..ba6d6f5df0 --- /dev/null +++ b/sca-java-2.x/tags/2.0.1-RC1/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/BasePolicyProvider.java @@ -0,0 +1,235 @@ +/* + * 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.provider; + +import java.security.Policy; +import java.util.ArrayList; +import java.util.List; + +import org.apache.tuscany.sca.assembly.Component; +import org.apache.tuscany.sca.assembly.ComponentService; +import org.apache.tuscany.sca.assembly.Endpoint; +import org.apache.tuscany.sca.assembly.EndpointReference; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.invocation.InvocationChain; +import org.apache.tuscany.sca.invocation.PhasedInterceptor; +import org.apache.tuscany.sca.policy.Intent; +import org.apache.tuscany.sca.policy.PolicyContainer; +import org.apache.tuscany.sca.policy.PolicyExpression; +import org.apache.tuscany.sca.policy.PolicySet; +import org.apache.tuscany.sca.policy.PolicySubject; +import org.apache.tuscany.sca.runtime.RuntimeComponent; +import org.apache.tuscany.sca.runtime.RuntimeComponentService; +import org.apache.tuscany.sca.runtime.RuntimeEndpoint; +import org.apache.tuscany.sca.runtime.RuntimeEndpointReference; + +/** + * Abstract base class for policy providers + * @tuscany.spi.extension.inheritfrom + */ +public abstract class BasePolicyProvider<T> implements PolicyProvider { + protected Class<T> policyType; + protected PolicySubject subject; + + protected BasePolicyProvider(Class<T> policyType, PolicySubject subject) { + this.policyType = policyType; + this.subject = subject; + } + + protected List<T> findPoliciesWithProvidedIntents(List<Intent> intents) { + List<PolicySet> applicablePolicySets = new ArrayList<PolicySet>(); + List<PolicySet> policySets = subject.getPolicySets(); + for ( PolicySet ps : policySets ) { + List<Intent> provided = ps.getProvidedIntents(); + for ( Intent intent : intents ) { + if ( provided.contains(intent) ) { + applicablePolicySets.add(ps); + continue; + } + + } + } + return findPolicies(applicablePolicySets); + } + + /* + * return policies for the service as a whole not including + * operation specific policies + */ + protected List<T> findPolicies() { + return findPolicies(subject.getPolicySets()); + } + + /* + * return policies for the service as a whole including + * operation specific policies + */ + protected List<T> findPolicies(Operation operation) { + // collect together all the candidate policy sets + List<PolicySet> policySets = new ArrayList<PolicySet>(); + // add endpoint or endpoint reference policy sets + policySets.addAll(subject.getPolicySets()); + // add interface operation policy sets + policySets.addAll(operation.getPolicySets()); + // add implementation operation policy sets + if (subject instanceof Endpoint){ + for(Operation op :((Endpoint)subject).getComponent().getImplementation().getOperations()){ + if (op.getName().equals(operation.getName())){ + policySets.addAll(op.getPolicySets()); + break; + } + } + } + + return findPolicies(policySets); + } + + private List<T> findPolicies(List<PolicySet> policySets) { + List<T> policies = new ArrayList<T>(); + + for (PolicySet ps : policySets) { + for (Object p : ps.getPolicies()) { + if (policyType.isInstance(p)) { + policies.add(policyType.cast(p)); + } + + if (p instanceof PolicyExpression) { + PolicyExpression exp = (PolicyExpression)p; + if (policyType.isInstance(exp.getPolicy())) { + policies.add(policyType.cast(exp.getPolicy())); + } + + // TODO - some code to handle the case where the + // policy expression is a WS-Policy + // Experimental at the moment. + if (PolicyContainer.class.isInstance(exp.getPolicy())){ + Object policy = ((PolicyContainer)exp.getPolicy()).getChildPolicy(policyType); + if(policy != null){ + policies.add(policyType.cast(policy)); + } + } + } + } + } + return policies; + } + + protected List<PolicySet> findPolicySets() { + List<PolicySet> policies = new ArrayList<PolicySet>(); + List<PolicySet> policySets = subject.getPolicySets(); + for (PolicySet ps : policySets) { + for (Object p : ps.getPolicies()) { + if (policyType.isInstance(p)) { + policies.add(ps); + } + if (p instanceof PolicyExpression) { + PolicyExpression exp = (PolicyExpression)p; + if (policyType.isInstance(exp.getPolicy())) { + policies.add(ps); + } + } + } + } + return policies; + } + + protected PolicySet findPolicySet() { + List<PolicySet> policySets = subject.getPolicySets(); + for (PolicySet ps : policySets) { + for (Object p : ps.getPolicies()) { + if (policyType.isInstance(p)) { + return ps; + } + if (p instanceof PolicyExpression) { + PolicyExpression exp = (PolicyExpression)p; + if (policyType.isInstance(exp.getPolicy())) { + return ps; + } + } + } + } + return null; + } + + protected String getContext() { + if (subject instanceof Endpoint) { + Endpoint endpoint = (Endpoint)subject; + return endpoint.getURI(); + } else if (subject instanceof EndpointReference) { + EndpointReference endpointReference = (EndpointReference)subject; + return endpointReference.getURI(); + } else if (subject instanceof Component) { + Component component = (Component)subject; + return component.getURI(); + } + return null; + } + + public void start() { + } + + public void stop() { + } + + public PhasedInterceptor createInterceptor(Operation operation) { + return null; + } + + public PhasedInterceptor createBindingInterceptor() { + return null; + } + + public void configureBinding(Object configuration){ + } + + protected InvocationChain getInvocationChain() { + if (subject instanceof RuntimeEndpoint) { + RuntimeEndpoint endpoint = (RuntimeEndpoint)subject; + List<InvocationChain> chains = endpoint.getInvocationChains(); + for (InvocationChain chain : chains) { + configure(chain, chain.getTargetOperation()); + } + + } else if (subject instanceof RuntimeEndpointReference) { + RuntimeEndpointReference endpointReference = (RuntimeEndpointReference)subject; + List<InvocationChain> chains = endpointReference.getInvocationChains(); + for (InvocationChain chain : chains) { + configure(chain, chain.getSourceOperation()); + } + } else if (subject instanceof RuntimeComponent) { + RuntimeComponent component = (RuntimeComponent)subject; + for (ComponentService s : component.getServices()) { + RuntimeComponentService service = (RuntimeComponentService)s; + for (Endpoint ep : service.getEndpoints()) { + List<InvocationChain> chains = ((RuntimeEndpoint)ep).getInvocationChains(); + for (InvocationChain chain : chains) { + configure(chain, chain.getTargetOperation()); + } + } + + } + } + return null; + } + + protected void configure(InvocationChain invocationChain, Operation operation) { + } + +} |