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org.fabric3.introspection.xml.composite.PropertyValueLoader 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.composite;
import javax.xml.namespace.QName;
import javax.xml.stream.Location;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import java.net.URI;
import java.net.URISyntaxException;
import org.fabric3.api.model.type.component.PropertyMany;
import org.fabric3.api.model.type.component.PropertyValue;
import org.fabric3.introspection.xml.common.AbstractExtensibleTypeLoader;
import org.fabric3.introspection.xml.common.InvalidAttributes;
import org.fabric3.introspection.xml.common.InvalidPropertyValue;
import org.fabric3.spi.introspection.IntrospectionContext;
import org.fabric3.spi.introspection.xml.InvalidPrefixException;
import org.fabric3.spi.introspection.xml.InvalidValue;
import org.fabric3.spi.introspection.xml.LoaderHelper;
import org.fabric3.spi.introspection.xml.LoaderRegistry;
import org.fabric3.spi.introspection.xml.LoaderUtil;
import org.fabric3.spi.introspection.xml.MissingAttribute;
import org.oasisopen.sca.Constants;
import org.oasisopen.sca.annotation.Reference;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
/**
* Loads property values configured on a component.
*/
public class PropertyValueLoader extends AbstractExtensibleTypeLoader {
private static final QName PROPERTY = new QName(Constants.SCA_NS, "property");
private final LoaderHelper helper;
public PropertyValueLoader(@Reference LoaderRegistry registry, @Reference LoaderHelper helper) {
super(registry);
addAttributes("name", "source", "file", "type", "element", "value", "many");
this.helper = helper;
}
public QName getXMLType() {
return PROPERTY;
}
public PropertyValue load(XMLStreamReader reader, IntrospectionContext context) throws XMLStreamException {
Location startLocation = reader.getLocation();
String name = reader.getAttributeValue(null, "name");
if (name == null || name.length() == 0) {
MissingAttribute failure = new MissingAttribute("Missing name attribute", startLocation);
context.addError(failure);
return null;
}
String source = reader.getAttributeValue(null, "source");
String file = reader.getAttributeValue(null, "file");
String typeAttribute = reader.getAttributeValue(null, "type");
QName type = null;
if (source != null) {
PropertyValue value = new PropertyValue(name, source);
value.setType(type);
if (typeAttribute != null) {
try {
type = helper.createQName(typeAttribute, reader);
value.setType(type);
} catch (InvalidPrefixException e) {
InvalidAttributes error = new InvalidAttributes("Invalid property type namespace:" + e.getMessage(), startLocation, value);
context.addError(error);
}
}
validateAttributes(reader, context, value);
LoaderUtil.skipToEndElement(reader);
return value;
} else if (file != null) {
try {
URI uri = new URI(file);
if (!uri.isAbsolute()) {
uri = context.getSourceBase().toURI().resolve(uri);
}
PropertyValue value = new PropertyValue(name, uri);
if (typeAttribute != null) {
try {
type = helper.createQName(typeAttribute, reader);
} catch (InvalidPrefixException e) {
InvalidAttributes error = new InvalidAttributes("Invalid property type namespace:" + e.getMessage(), startLocation, value);
context.addError(error);
}
}
value.setType(type);
validateAttributes(reader, context, value);
LoaderUtil.skipToEndElement(reader);
return value;
} catch (URISyntaxException e) {
InvalidValue failure = new InvalidValue("File specified for property " + name + " is invalid: " + file, startLocation, e);
context.addError(failure);
return null;
}
} else {
return loadInlinePropertyValue(name, reader, startLocation, context);
}
}
private PropertyValue loadInlinePropertyValue(String name, XMLStreamReader reader, Location location, IntrospectionContext context)
throws XMLStreamException {
String typeAttribute = reader.getAttributeValue(null, "type");
String elementAttribute = reader.getAttributeValue(null, "element");
PropertyMany many = parseMany(reader);
String valueAttribute = reader.getAttributeValue(null, "value");
PropertyValue propertyValue = new PropertyValue(name, many);
validateAttributes(reader, context, propertyValue);
Document value = helper.loadPropertyValues(reader);
if (valueAttribute != null) {
NodeList childNodes = value.getDocumentElement().getChildNodes();
if (valueAttribute != null && childNodes.getLength() > 0 && childNodes.item(0).getTextContent().length() > 0) {
InvalidPropertyValue error = new InvalidPropertyValue("Property value configured using a value attribute and inline: " + name,
location,
propertyValue);
context.addError(error);
return propertyValue;
}
value = helper.loadPropertyValue(valueAttribute);
}
propertyValue.setValue(value);
QName type = null;
QName element = null;
if (typeAttribute != null) {
if (elementAttribute != null) {
InvalidValue failure = new InvalidValue("Cannot supply both type and element for property: " + name, location);
context.addError(failure);
}
try {
type = helper.createQName(typeAttribute, reader);
} catch (InvalidPrefixException e) {
InvalidAttributes error = new InvalidAttributes("Invalid property type namespace:" + e.getMessage(), location, propertyValue);
context.addError(error);
}
} else if (elementAttribute != null) {
try {
element = helper.createQName(elementAttribute, reader);
} catch (InvalidPrefixException e) {
InvalidAttributes error = new InvalidAttributes("Invalid property element namespace:" + e.getMessage(), location, propertyValue);
context.addError(error);
}
}
propertyValue.setElement(element);
propertyValue.setType(type);
return propertyValue;
}
private PropertyMany parseMany(XMLStreamReader reader) {
String manyAttribute = reader.getAttributeValue(null, "many");
if (manyAttribute == null) {
return PropertyMany.NOT_SPECIFIED;
} else if (manyAttribute.equalsIgnoreCase("true")) {
return PropertyMany.MANY;
}
return PropertyMany.SINGLE;
}
}
