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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.core.loader;
import javax.xml.namespace.QName;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import org.w3c.dom.Document;
import static org.osoa.sca.Constants.SCA_NS;
import org.osoa.sca.annotations.Constructor;
import org.osoa.sca.annotations.Reference;
import org.apache.tuscany.spi.deployer.DeploymentContext;
import org.apache.tuscany.spi.extension.LoaderExtension;
import org.apache.tuscany.spi.loader.LoaderException;
import org.apache.tuscany.spi.loader.LoaderRegistry;
import org.apache.tuscany.spi.model.ModelObject;
import org.apache.tuscany.spi.model.Property;
/**
* Loads a property from an XML-based assembly file
*
* @version $Rev$ $Date$
*/
public class PropertyLoader extends LoaderExtension<Property> {
public static final String PROPERTY_NAME_ATTR = "name";
public static final String PROPERTY_TYPE_ATTR = "type";
public static final String PROPERTY_MANY_ATTR = "many";
public static final String REQUIRED_ATTR = "override";
public static final QName PROPERTY = new QName(SCA_NS, "property");
private final DocumentBuilder documentBuilder;
@Constructor
public PropertyLoader(@Reference LoaderRegistry registry) {
super(registry);
try {
documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
} catch (ParserConfigurationException e) {
// we should be able to construct the default DocumentBuilder
throw new AssertionError(e);
}
}
public QName getXMLType() {
return PROPERTY;
}
public Property<?> load(ModelObject object, XMLStreamReader reader,
DeploymentContext ctx)
throws XMLStreamException, LoaderException {
assert PROPERTY.equals(reader.getName());
String name = reader.getAttributeValue(null, PROPERTY_NAME_ATTR);
String typeName = reader.getAttributeValue(null, PROPERTY_TYPE_ATTR);
QName xmlType = null;
if (typeName != null) {
int index = typeName.indexOf(':');
if (index != -1) {
String prefix = typeName.substring(0, index);
String localName = typeName.substring(index + 1);
String ns = reader.getNamespaceURI(prefix);
xmlType = new QName(ns, localName, prefix);
}
}
boolean many = Boolean.parseBoolean(reader.getAttributeValue(null, PROPERTY_MANY_ATTR));
String required = reader.getAttributeValue(null, REQUIRED_ATTR);
Document value = PropertyUtils.createPropertyValue(reader, xmlType, documentBuilder);
Property<?> property = new Property();
property.setRequired(Boolean.parseBoolean(required));
property.setName(name);
property.setXmlType(xmlType);
property.setMany(many);
property.setDefaultValue(value);
return property;
}
}
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