org.fabric3.introspection.xml.template.TemplateLoader Maven / Gradle / Ivy
/*
* Fabric3
* Copyright (c) 2009-2015 Metaform Systems
*
* Licensed 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.
* Portions originally based on Apache Tuscany 2007
* licensed under the Apache 2.0 license.
*/
package org.fabric3.introspection.xml.template;
import javax.xml.stream.Location;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import org.fabric3.api.model.type.ModelObject;
import org.fabric3.spi.introspection.IntrospectionContext;
import org.fabric3.spi.introspection.xml.AbstractValidatingTypeLoader;
import org.fabric3.spi.introspection.xml.LoaderUtil;
import org.fabric3.spi.introspection.xml.MissingAttribute;
import org.fabric3.spi.introspection.xml.TemplateRegistry;
import org.oasisopen.sca.annotation.EagerInit;
import org.oasisopen.sca.annotation.Property;
import org.oasisopen.sca.annotation.Reference;
/**
* General class for loading template definitions such as <binding.template>. This class is general and is designed to be
* configured to support specific element types. It works by resolving the requested template using the {@link TemplateRegistry}.
*/
@EagerInit
public class TemplateLoader extends AbstractValidatingTypeLoader {
private TemplateRegistry registry;
private Class expectedType;
@SuppressWarnings({"unchecked"})
public TemplateLoader(@Reference TemplateRegistry registry, @Property(name = "expectedType") String expectedType) {
this.registry = registry;
try {
this.expectedType = (Class) getClass().getClassLoader().loadClass(expectedType);
} catch (ClassNotFoundException e) {
throw new AssertionError(e);
}
addAttributes("name");
}
public ModelObject load(XMLStreamReader reader, IntrospectionContext context) throws XMLStreamException {
Location startLocation = reader.getLocation();
validateAttributes(reader, context);
String name = reader.getAttributeValue(null, "name");
if (name == null) {
MissingAttribute error = new MissingAttribute("Attribute name must be specified", startLocation);
context.addError(error);
LoaderUtil.skipToEndElement(reader);
return null;
}
ModelObject parsed = registry.resolve(expectedType, name);
if (parsed == null) {
TemplateNotFound error = new TemplateNotFound(name, startLocation);
context.addError(error);
}
LoaderUtil.skipToEndElement(reader);
return parsed;
}
}