org.fabric3.introspection.xml.composite.CompositeServiceLoader Maven / Gradle / Ivy
/*
* Fabric3
* Copyright (c) 2009-2013 Metaform Systems
*
* Fabric3 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version, with the
* following exception:
*
* Linking this software statically or dynamically with other
* modules is making a combined work based on this software.
* Thus, the terms and conditions of the GNU General Public
* License cover the whole combination.
*
* As a special exception, the copyright holders of this software
* give you permission to link this software with independent
* modules to produce an executable, regardless of the license
* terms of these independent modules, and to copy and distribute
* the resulting executable under terms of your choice, provided
* that you also meet, for each linked independent module, the
* terms and conditions of the license of that module. An
* independent module is a module which is not derived from or
* based on this software. If you modify this software, you may
* extend this exception to your version of the software, but
* you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version.
*
* Fabric3 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the
* GNU General Public License along with Fabric3.
* If not, see {
private static final QName CALLBACK = new QName(SCA_NS, "callback");
private LoaderRegistry registry;
private LoaderHelper loaderHelper;
private boolean roundTrip;
public CompositeServiceLoader(@Reference LoaderRegistry registry, @Reference LoaderHelper loaderHelper) {
this.registry = registry;
this.loaderHelper = loaderHelper;
addAttributes("name", "requires", "promote", "policySets");
}
@Property(required = false)
public void setRoundTrip(boolean roundTrip) {
this.roundTrip = roundTrip;
}
public CompositeService load(XMLStreamReader reader, IntrospectionContext context) throws XMLStreamException {
Location startLocation = reader.getLocation();
String name = reader.getAttributeValue(null, "name");
if (name == null) {
MissingAttribute failure = new MissingAttribute("Service name not specified", startLocation);
context.addError(failure);
return null;
}
CompositeService service = new CompositeService(name);
URI uri = parsePromote(service, reader, startLocation, context);
service.setPromote(uri);
if (roundTrip) {
service.enableRoundTrip();
}
loaderHelper.loadPolicySetsAndIntents(service, reader, context);
validateAttributes(reader, context, service);
boolean callback = false;
while (true) {
int i = reader.next();
switch (i) {
case START_ELEMENT:
Location location = reader.getLocation();
callback = CALLBACK.equals(reader.getName());
if (callback) {
reader.nextTag();
}
QName elementName = reader.getName();
ModelObject type = registry.load(reader, ModelObject.class, context);
if (type instanceof ServiceContract) {
service.setServiceContract((ServiceContract) type);
} else if (type instanceof BindingDefinition) {
BindingDefinition binding = (BindingDefinition) type;
if (callback) {
if (binding.getName() == null) {
// set the default binding name
BindingHelper.configureName(binding, service.getCallbackBindings(), location, context);
}
boolean check = BindingHelper.checkDuplicateNames(binding, service.getCallbackBindings(), location, context);
if (check) {
service.addCallbackBinding(binding);
}
} else {
if (binding.getName() == null) {
// set the default binding name
BindingHelper.configureName(binding, service.getBindings(), location, context);
}
boolean check = BindingHelper.checkDuplicateNames(binding, service.getBindings(), location, context);
if (check) {
service.addBinding(binding);
}
}
} else if (type == null) {
// there was an error loading the element, ignore it as the errors will have been reported
continue;
} else {
context.addError(new UnrecognizedElement(reader, location, service));
continue;
}
if (!reader.getName().equals(elementName) || reader.getEventType() != END_ELEMENT) {
throw new AssertionError("Loader must position the cursor to the end element");
}
break;
case END_ELEMENT:
if (callback) {
callback = false;
break;
}
return service;
}
}
}
private URI parsePromote(CompositeService service, XMLStreamReader reader, Location startLocation, IntrospectionContext context) {
String name = service.getName();
String promote = reader.getAttributeValue(null, "promote");
if (promote == null) {
MissingPromotion error = new MissingPromotion("Promotion not specified on composite service " + name, startLocation, service);
context.addError(error);
}
URI uri;
try {
uri = loaderHelper.parseUri(promote);
} catch (URISyntaxException e) {
InvalidValue error = new InvalidValue("Invalid promote URI specified on service " + name, startLocation, e, service);
context.addError(error);
uri = URI.create("");
}
if (uri == null) {
InvalidValue error = new InvalidValue("Empty promote URI specified on service " + name, startLocation, service);
context.addError(error);
uri = URI.create("");
}
return uri;
}
}
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