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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.builder.impl;
import java.util.List;
import javax.xml.namespace.QName;
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.Messages;
import org.apache.tuscany.sca.assembly.builder.PolicyBuilder;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.monitor.Monitor;
import org.apache.tuscany.sca.policy.Intent;
import org.apache.tuscany.sca.policy.PolicySubject;
/**
* Intent Validator
*/
public class IntentValidator implements PolicyBuilder {
/**
* Defaut constructor
* @param registry Extension Registry
*/
public IntentValidator(ExtensionPointRegistry registry) {
super();
}
public boolean build(Endpoint endpoint, BuilderContext context) {
return checkMutualExclusion(endpoint, context);
}
public boolean build(EndpointReference endpointReference, BuilderContext context) {
boolean ok = checkMutualExclusion(endpointReference, context);
if(!ok) {
return false;
}
Endpoint endpoint = endpointReference.getTargetEndpoint();
if (endpoint == null) {
return true;
}
ok = checkMutualExclusion(endpointReference, endpoint, context);
List<Intent> intentList1 = endpointReference.getRequiredIntents();
List<Intent> intentList2 = endpoint.getRequiredIntents();
return ok;
}
public boolean build(Component component, Implementation implementation, BuilderContext context) {
return true;
}
public boolean build(EndpointReference endpointReference, Endpoint endpoint, BuilderContext context) {
return true;
}
public QName getPolicyType() {
return null;
}
public List<QName> getSupportedBindings() {
return null;
}
/**
* Check if two policy subjects requires multually exclusive intents
* @param subject1
* @param subject2
* @param monitor
* @return
*/
private boolean checkMutualExclusion(PolicySubject subject1, PolicySubject subject2, BuilderContext context) {
if (subject1 == subject2 || subject1 == null || subject2 == null) {
return false;
}
for (Intent i1 : subject1.getRequiredIntents()) {
for (Intent i2 : subject2.getRequiredIntents()) {
if (i1.getExcludedIntents().contains(i2) || i2.getExcludedIntents().contains(i1)) {
Monitor.error(context.getMonitor(),
this,
Messages.ASSEMBLY_VALIDATION,
"MutuallyExclusiveIntents",
new Object[] {subject1, subject2},
i1,
i2);
return true;
}
}
}
return false;
}
private boolean checkMutualExclusion(PolicySubject subject, BuilderContext context) {
if (subject == null) {
return false;
}
List<Intent> intents = subject.getRequiredIntents();
int size = intents.size();
for (int i = 0; i < size; i++) {
for (int j = i + 1; j < size; j++) {
Intent i1 = intents.get(i);
Intent i2 = intents.get(j);
if (i1 != i2 && i1.getExcludedIntents().contains(i2) || i2.getExcludedIntents().contains(i1)) {
Monitor.error(context.getMonitor(),
this,
Messages.ASSEMBLY_VALIDATION,
"MutuallyExclusiveIntents",
subject,
i1,
i2);
return true;
}
}
}
return false;
}
}
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