/*
* 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.implementation.osgi.xml;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.StringTokenizer;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.apache.tuscany.sca.contribution.processor.BaseStAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
import org.apache.tuscany.sca.contribution.processor.ContributionWriteException;
import org.apache.tuscany.sca.contribution.processor.ProcessorContext;
import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.FactoryExtensionPoint;
import org.apache.tuscany.sca.implementation.osgi.ServiceDescription;
import org.apache.tuscany.sca.implementation.osgi.ServiceDescriptions;
import org.apache.tuscany.sca.implementation.osgi.ServiceDescriptionsFactory;
import org.osgi.framework.Constants;
/*
<?xml version="1.0" encoding="UTF-8"?>
<endpoint-descriptions xmlns="http://www.osgi.org/xmlns/rsa/v1.0.0">
<endpoint-description>
<property name="service.intents">
<list>
<value>SOAP</value>
<value>HTTP</value>
</list>
</property>
<property name="endpoint.id" value="http://ws.acme.com:9000/hello"/>
<property name="objectClass" value="com.acme.Foo"/>
<property name="endpoint.package.version.com.acme" value="4.2"/>
<property name="service.imported.configs" value="com.acme"/>
<property name="com.acme.ws.xml">
<xml>
<config xmlns="http://acme.com/defs">
<port>1029</port>
<host>www.acme.com</host>
</config>
</xml>
</property>
</endpoint-description>
</endpoint-descriptions>
*/
public class ServiceDescriptionsProcessor extends BaseStAXArtifactProcessor implements
StAXArtifactProcessor<ServiceDescriptions> {
private ServiceDescriptionsFactory factory;
private StAXArtifactProcessor processor;
public ServiceDescriptionsProcessor(ExtensionPointRegistry registry, StAXArtifactProcessor processor) {
this.processor = processor;
FactoryExtensionPoint modelFactories = registry.getExtensionPoint(FactoryExtensionPoint.class);
this.factory = modelFactories.getFactory(ServiceDescriptionsFactory.class);
}
public ServiceDescriptions read(XMLStreamReader reader, ProcessorContext context) throws XMLStreamException,
ContributionReadException {
int event = reader.getEventType();
ServiceDescriptions sds = null;
ServiceDescription sd = null;
String propertyName = null;
String propertyType = "String";
Object propertyValue = null;
String propertyLiteral = null;
boolean xml = false;
boolean multiValued = false;
while (true) {
switch (event) {
case XMLStreamConstants.START_ELEMENT:
QName name = reader.getName();
if (ServiceDescriptions.SERVICE_DESCRIPTIONS_QNAME.equals(name)) {
sds = factory.createServiceDescriptions();
} else if (ServiceDescriptions.SERVICE_DESCRIPTION_QNAME.equals(name)) {
sd = factory.createServiceDescription();
sds.add(sd);
} else if ("property".equals(name.getLocalPart())) {
multiValued = false;
propertyName = reader.getAttributeValue(null, "name");
propertyType = reader.getAttributeValue(null, "value-type");
if (propertyType == null) {
propertyType = "String";
}
propertyLiteral = reader.getAttributeValue(null, "value");
// if (propertyLiteral == null) {
// propertyLiteral = reader.getElementText();
// }
if (propertyLiteral != null) {
propertyLiteral = propertyLiteral.trim();
propertyValue = getPropertyValue(reader, propertyName, propertyLiteral, propertyType);
}
} else if ("list".equals(name.getLocalPart())) {
if (propertyValue != null) {
throw new IllegalArgumentException("@value and <list> are both present");
}
propertyValue = new ArrayList<Object>();
multiValued = true;
} else if ("array".equals(name.getLocalPart())) {
if (propertyValue != null) {
throw new IllegalArgumentException("@value and <array> are both present");
}
propertyValue = new ArrayList<Object>();
multiValued = true;
} else if ("set".equals(name.getLocalPart())) {
if (propertyValue != null) {
throw new IllegalArgumentException("@value and <set> are both present");
}
propertyValue = new HashSet<Object>();
multiValued = true;
} else if ("xml".equals(name.getLocalPart())) {
xml = true;
} else if ("value".equals(name.getLocalPart())) {
propertyLiteral = reader.getElementText();
if (propertyLiteral != null) {
propertyLiteral = propertyLiteral.trim();
Object value = getPropertyValue(reader, propertyName, propertyLiteral, propertyType);
if (multiValued && (propertyValue instanceof Collection)) {
((Collection)propertyValue).add(value);
} else if (propertyValue == null) {
propertyValue = value;
}
}
} else {
// FIXME: [rfeng] The rsa spec says the XML should be saved as String
Object value = processor.read(reader, context);
if (xml) {
if (multiValued && (propertyValue instanceof Collection)) {
((Collection)propertyValue).add(value);
} else if (propertyValue == null) {
propertyValue = value;
}
}
}
break;
case XMLStreamConstants.END_ELEMENT:
name = reader.getName();
if (ServiceDescriptions.SERVICE_DESCRIPTION_QNAME.equals(name)) {
// Reset the sd
sd = null;
} else if (ServiceDescriptions.PROPERTY_QNAME.equals(name)) {
if (sd != null && propertyName != null) {
if (propertyValue == null) {
throw new IllegalArgumentException("No value is defined for " + propertyName);
}
sd.getProperties().put(propertyName, propertyValue);
}
propertyName = null;
propertyType = "String";
propertyValue = null;
multiValued = false;
} else if (ServiceDescriptions.XML_QNAME.equals(name)) {
xml = false;
} else if (ServiceDescriptions.SERVICE_DESCRIPTIONS_QNAME.equals(name)) {
return sds;
}
break;
}
if (reader.hasNext()) {
event = reader.next();
} else {
return sds;
}
}
}
private Object getPropertyValue(XMLStreamReader reader, String propertyName, String propertyLiteral, String propType) {
Object propertyValue = null;
propertyValue = propertyLiteral;
if ("Integer".equals(propType) || "int".equals(propType)) {
propertyValue = Integer.valueOf(propertyLiteral);
} else if ("Long".equals(propType) || "long".equals(propType)) {
propertyValue = Long.valueOf(propertyLiteral);
} else if ("Float".equals(propType) || "float".equals(propType)) {
propertyValue = Float.valueOf(propertyLiteral);
} else if ("Double".equals(propType) || "double".equals(propType)) {
propertyValue = Double.valueOf(propertyLiteral);
} else if ("Short".equals(propType) || "short".equals(propType)) {
propertyValue = Short.valueOf(propertyLiteral);
} else if ("Character".equals(propType) || "char".equals(propType)) {
propertyValue = propertyLiteral.charAt(0);
} else if ("Byte".equals(propType) || "byte".equals(propType)) {
propertyValue = Byte.valueOf(propertyLiteral);
} else if ("Boolean".equals(propType) || "boolean".equals(propType)) {
propertyValue = Boolean.valueOf(propertyLiteral);
}
if (propertyName.endsWith(".intents")) {
propertyValue = toQNames(reader, propertyLiteral);
}
if (Constants.OBJECTCLASS.equals(propertyName)) {
return propertyLiteral.split("( |\t|\n|\r|\f)+");
}
return propertyValue;
}
/**
* Convert ns1:e1 ns2:e2 to {http://ns1}e1 {http://ns2}e2
* @param reader
* @param value
* @return
*/
private String toQNames(XMLStreamReader reader, String value) {
if (value == null) {
return null;
}
StringBuffer sb = new StringBuffer();
for (StringTokenizer tokens = new StringTokenizer(value, " \t\n\r\f,"); tokens.hasMoreTokens();) {
QName qname = getQNameValue(reader, tokens.nextToken());
sb.append(qname.toString()).append(' ');
}
return sb.toString().trim();
}
public QName getArtifactType() {
return ServiceDescriptions.SERVICE_DESCRIPTIONS_QNAME;
}
public void write(ServiceDescriptions model, XMLStreamWriter writer, ProcessorContext context)
throws ContributionWriteException, XMLStreamException {
// TODO: To be implemented
}
public Class<ServiceDescriptions> getModelType() {
return ServiceDescriptions.class;
}
public void resolve(ServiceDescriptions model, ModelResolver resolver, ProcessorContext context)
throws ContributionResolveException {
}
}