diff options
Diffstat (limited to 'sandbox/mobile-android/tuscany-assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/BindingPolicyComputer.java')
| -rw-r--r-- | sandbox/mobile-android/tuscany-assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/BindingPolicyComputer.java | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/sandbox/mobile-android/tuscany-assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/BindingPolicyComputer.java b/sandbox/mobile-android/tuscany-assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/BindingPolicyComputer.java new file mode 100644 index 0000000000..ec25c8e2a7 --- /dev/null +++ b/sandbox/mobile-android/tuscany-assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/BindingPolicyComputer.java @@ -0,0 +1,262 @@ +/*
+ * 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.assembly.builder.impl;
+
+import java.util.ArrayList;
+import java.util.Hashtable;
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.ConfiguredOperation;
+import org.apache.tuscany.sca.assembly.Contract;
+import org.apache.tuscany.sca.assembly.OperationsConfigurator;
+import org.apache.tuscany.sca.assembly.Service;
+import org.apache.tuscany.sca.policy.Intent;
+import org.apache.tuscany.sca.policy.IntentAttachPoint;
+import org.apache.tuscany.sca.policy.IntentAttachPointType;
+import org.apache.tuscany.sca.policy.PolicySet;
+import org.apache.tuscany.sca.policy.PolicySetAttachPoint;
+import org.apache.tuscany.sca.policy.util.PolicyComputationUtils;
+import org.apache.tuscany.sca.policy.util.PolicyValidationException;
+
+/**
+ * Policy computation methods pertaining to computing Binding policies
+ */
+public class BindingPolicyComputer extends PolicyComputer {
+
+ public BindingPolicyComputer() {
+ super();
+ }
+
+ public void computeBindingIntentsAndPolicySets(Contract contract) throws PolicyValidationException {
+ for (Binding binding : contract.getBindings()) {
+ if (binding instanceof PolicySetAttachPoint) {
+ computeIntents((IntentAttachPoint)binding, contract.getRequiredIntents());
+
+ aggregateAndPruneApplicablePolicySets(contract.getApplicablePolicySets(),
+ ((PolicySetAttachPoint)binding).getApplicablePolicySets());
+
+ computePolicySets((PolicySetAttachPoint)binding, contract.getPolicySets());
+
+ if ( binding instanceof OperationsConfigurator &&
+ contract instanceof OperationsConfigurator ) {
+ //add or merge service operations to the binding
+ addInheritedOpConfOnBindings((OperationsConfigurator)contract,
+ (OperationsConfigurator)binding,
+ (PolicySetAttachPoint)binding);
+
+ computeIntentsForOperations((IntentAttachPoint)binding);
+ computePolicySetsForOperations(contract.getApplicablePolicySets(),
+ (PolicySetAttachPoint)binding);
+ }
+ }
+ }
+
+ if ( contract.getCallback() != null ) {
+ for (Binding binding : contract.getCallback().getBindings()) {
+ if (binding instanceof PolicySetAttachPoint) {
+ computeIntents((IntentAttachPoint)binding, contract.getCallback().getRequiredIntents());
+
+ aggregateAndPruneApplicablePolicySets(contract.getApplicablePolicySets(),
+ ((PolicySetAttachPoint)binding).getApplicablePolicySets());
+
+ computePolicySets((PolicySetAttachPoint)binding, contract.getCallback().getPolicySets());
+ }
+ }
+ }
+ }
+
+
+ private void computeIntents(IntentAttachPoint policiedBinding, List<Intent> inheritedIntents)
+ throws PolicyValidationException {
+ //since the parent component could also contain intents that apply to implementation
+ //and binding elements within, we filter out only those that apply to this binding type
+ List<Intent> prunedIntents = computeInheritableIntents(policiedBinding.getType(),
+ inheritedIntents);
+ policiedBinding.getRequiredIntents().addAll(prunedIntents);
+
+ normalizeIntents(policiedBinding);
+ }
+
+
+ private void computePolicySets(PolicySetAttachPoint policiedBinding,
+ List<PolicySet> inheritedPolicySets) throws PolicyValidationException {
+
+ List<PolicySet> prunedPolicySets = computeInheritablePolicySets(inheritedPolicySets,
+ policiedBinding.getApplicablePolicySets());
+ policiedBinding.getPolicySets().addAll(prunedPolicySets);
+ normalizePolicySets(policiedBinding);
+ }
+
+ public void determineApplicableBindingPolicySets(Contract source, Contract target) throws PolicyComputationException {
+ List<Intent> intentsCopy = null;
+ for (Binding aBinding : source.getBindings()) {
+ if (aBinding instanceof PolicySetAttachPoint) {
+ PolicySetAttachPoint policiedBinding = (PolicySetAttachPoint)aBinding;
+ IntentAttachPointType bindingType = policiedBinding.getType();
+
+
+ intentsCopy = new ArrayList<Intent>(policiedBinding.getRequiredIntents());
+ // add the target component's intents to the reference binding
+ if (target != null) {
+ for (Intent intent : target.getRequiredIntents()) {
+ if (!policiedBinding.getRequiredIntents().contains(intent)) {
+ for (QName constrained : intent.getConstrains()) {
+ if (bindingType != null && bindingType.getName().getNamespaceURI()
+ .equals(constrained.getNamespaceURI())
+ && bindingType.getName().getLocalPart().startsWith(constrained
+ .getLocalPart())) {
+ policiedBinding.getRequiredIntents().add(intent);
+ break;
+ }
+ }
+ }
+ }
+ }
+
+ //trim intents specified in operations. First check for policysets specified on the operation
+ //and then in the parent implementation
+ if ( aBinding instanceof OperationsConfigurator ) {
+ OperationsConfigurator opConfigurator = (OperationsConfigurator)aBinding;
+
+ for ( ConfiguredOperation confOp : opConfigurator.getConfiguredOperations() ) {
+ List<Intent> opsIntentsCopy = new ArrayList<Intent>(confOp.getRequiredIntents());
+
+ trimInherentlyProvidedIntents(policiedBinding.getType(),
+ confOp.getRequiredIntents());
+ trimProvidedIntents(confOp.getRequiredIntents(), confOp.getPolicySets());
+ trimProvidedIntents(confOp.getRequiredIntents(), policiedBinding.getPolicySets());
+
+ determineApplicableDomainPolicySets(policiedBinding.getApplicablePolicySets(),
+ confOp,
+ policiedBinding.getType());
+
+ if (confOp.getRequiredIntents().size() > 0) {
+ new PolicyComputationException("The following are unfulfilled intents for operations configured in "
+ + "binding - " + aBinding.getName() + "\nUnfulfilled Intents = " +
+ confOp.getRequiredIntents());
+ }
+
+ //the intents list could have been trimmed when matching for policysets
+ //since the bindings may need the original set of intents we copy that back
+ confOp.getRequiredIntents().clear();
+ confOp.getRequiredIntents().addAll(opsIntentsCopy);
+
+ }
+ }
+
+ trimInherentlyProvidedIntents(policiedBinding.getType(),
+ policiedBinding.getRequiredIntents());
+ trimProvidedIntents(policiedBinding.getRequiredIntents(), policiedBinding
+ .getPolicySets());
+
+ // determine additional policysets that match remaining intents
+ // TODO: resolved to domain policy registry and attach suitable
+ // policy sets to the binding
+ // for now using the SCA Definitions instead of registry
+ // if there are intents that are not provided by any policy set
+ // throw a warning
+ determineApplicableDomainPolicySets(source, policiedBinding);
+
+ //the intents list could have been trimmed when matching for policysets
+ //since the bindings may need the original set of intents we copy that back
+ policiedBinding.getRequiredIntents().clear();
+ policiedBinding.getRequiredIntents().addAll(intentsCopy);
+
+ }
+ }
+ }
+
+ private void determineApplicableDomainPolicySets(Contract contract,
+ PolicySetAttachPoint policiedBinding)
+ throws PolicyComputationException {
+ //if ( domainPolicySets != null) {
+ determineApplicableDomainPolicySets(policiedBinding.getApplicablePolicySets(),
+ policiedBinding,
+ policiedBinding.getType());
+
+ if ( policiedBinding.getRequiredIntents().size() > 0 ) {
+ if ( contract instanceof Service ) {
+ throw new PolicyComputationException("The following are unfulfilled intents for " +
+ "binding in service - " + contract.getName() + "\nUnfulfilled Intents = " +
+ policiedBinding.getRequiredIntents());
+ } else {
+ throw new PolicyComputationException("The are unfulfilled intents for " +
+ "binding in reference - " + contract.getName() + "\nUnfulfilled Intents = " +
+ policiedBinding.getRequiredIntents());
+ }
+ }
+ //}
+ }
+
+ private void addInheritedOpConfOnBindings(OperationsConfigurator source,
+ OperationsConfigurator target,
+ PolicySetAttachPoint attachPoint) throws PolicyValidationException {
+ boolean found = false;
+
+ List<ConfiguredOperation> additionalOperations = new ArrayList<ConfiguredOperation>();
+ for ( ConfiguredOperation sourceConfOp : source.getConfiguredOperations() ) {
+ for ( ConfiguredOperation targetConfOp : target.getConfiguredOperations() ) {
+ if ( sourceConfOp.getName().equals(targetConfOp.getName())) {
+ List<Intent> prunedIntents = computeInheritableIntents(attachPoint.getType(),
+ sourceConfOp.getRequiredIntents());
+ PolicyComputationUtils.addInheritedIntents(prunedIntents,
+ targetConfOp.getRequiredIntents());
+
+ List<PolicySet> prunedPolicySets = computeInheritablePolicySets(sourceConfOp.getPolicySets(),
+ attachPoint.getApplicablePolicySets());
+ PolicyComputationUtils.addInheritedPolicySets(prunedPolicySets, targetConfOp.getPolicySets(), true);
+ found = true;
+ break;
+ }
+ }
+
+ if ( !found ) {
+ additionalOperations.add(sourceConfOp);
+ }
+ }
+
+ if ( !additionalOperations.isEmpty() ) {
+ target.getConfiguredOperations().addAll(additionalOperations);
+ }
+ }
+
+ /*private void addInheritedOpConfOnBindings(Contract contract) {
+ for ( Binding binding : contract.getBindings() ) {
+ if ( binding instanceof OperationsConfigurator ) {
+ addInheritedOperationConfigurations(contract, (OperationsConfigurator)binding);
+ }
+ }
+ }*/
+
+ private void aggregateAndPruneApplicablePolicySets(List<PolicySet> source, List<PolicySet> target) {
+ target.addAll(source);
+ //strip duplicates
+ Hashtable<QName, PolicySet> policySetTable = new Hashtable<QName, PolicySet>();
+ for ( PolicySet policySet : target ) {
+ policySetTable.put(policySet.getName(), policySet);
+ }
+
+ target.clear();
+ target.addAll(policySetTable.values());
+ }
+}
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