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/*
* 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.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.PolicyExpression;
import org.apache.tuscany.sca.policy.PolicySet;
import org.apache.tuscany.sca.policy.PolicySubject;
import org.apache.tuscany.sca.runtime.RuntimeComponentReference;
import org.apache.tuscany.sca.runtime.RuntimeComponentService;
import org.apache.tuscany.sca.runtime.RuntimeWire;
/**
* Abstract base class for policy providers
*/
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> findPolicies() {
List<T> policies = new ArrayList<T>();
List<PolicySet> policySets = subject.getPolicySets();
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()));
}
}
}
}
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;
}
private InvocationChain getInvocationChain() {
if (subject instanceof Endpoint) {
Endpoint endpoint = (Endpoint)subject;
RuntimeComponentService service = (RuntimeComponentService)endpoint.getService();
RuntimeWire wire = service.getRuntimeWire(endpoint.getBinding());
List<InvocationChain> chains = wire.getInvocationChains();
for (InvocationChain chain : chains) {
configure(chain, chain.getTargetOperation());
}
} else if (subject instanceof EndpointReference) {
EndpointReference endpointReference = (EndpointReference)subject;
RuntimeComponentReference reference = (RuntimeComponentReference)endpointReference.getReference();
RuntimeWire wire = reference.getRuntimeWire(endpointReference.getBinding());
List<InvocationChain> chains = wire.getInvocationChains();
for (InvocationChain chain : chains) {
configure(chain, chain.getSourceOperation());
}
} else if (subject instanceof Component) {
Component component = (Component)subject;
for (ComponentService s : component.getServices()) {
RuntimeComponentService service = (RuntimeComponentService)s;
for (RuntimeWire wire : service.getRuntimeWires()) {
List<InvocationChain> chains = wire.getInvocationChains();
for (InvocationChain chain : chains) {
configure(chain, chain.getTargetOperation());
}
}
}
}
return null;
}
protected void configure(InvocationChain invocationChain, Operation operation) {
}
}
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