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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.
package com.microsoft.azure.servicebus.management;
import com.microsoft.azure.servicebus.primitives.MessagingEntityNotFoundException;
import com.microsoft.azure.servicebus.primitives.ServiceBusException;
import com.microsoft.azure.servicebus.rules.CorrelationFilter;
import com.microsoft.azure.servicebus.rules.FalseFilter;
import com.microsoft.azure.servicebus.rules.Filter;
import com.microsoft.azure.servicebus.rules.RuleAction;
import com.microsoft.azure.servicebus.rules.RuleDescription;
import com.microsoft.azure.servicebus.rules.SqlFilter;
import com.microsoft.azure.servicebus.rules.SqlRuleAction;
import com.microsoft.azure.servicebus.rules.TrueFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List;
import static java.nio.charset.StandardCharsets.UTF_8;
class RuleDescriptionSerializer {
private static final Logger TRACE_LOGGER = LoggerFactory.getLogger(RuleDescriptionSerializer.class);
static String serialize(RuleDescription ruleDescription) throws ServiceBusException {
DocumentBuilder dBuilder = null;
try {
DocumentBuilderFactory dbFactory = SerializerUtil.getDocumentBuilderFactory();
dBuilder = dbFactory.newDocumentBuilder();
} catch (ParserConfigurationException e) {
throw new ServiceBusException(false, e);
}
Document doc = dBuilder.newDocument();
Element rootElement = doc.createElementNS(ManagementClientConstants.ATOM_NS, "entry");
doc.appendChild(rootElement);
Element contentElement = doc.createElementNS(ManagementClientConstants.ATOM_NS, "content");
rootElement.appendChild(contentElement);
contentElement.setAttribute("type", "application/xml");
contentElement.appendChild(serializeRule(doc, ruleDescription, "RuleDescription"));
// Convert dom document to string.
StringWriter output = new StringWriter();
try {
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
transformer.transform(new DOMSource(doc), new StreamResult(output));
} catch (TransformerException e) {
throw new ServiceBusException(false, e);
}
return output.toString();
}
static Element serializeRule(Document doc, RuleDescription ruleDescription, String rootName) throws ServiceBusException {
Element rdElement = doc.createElementNS(ManagementClientConstants.SB_NS, rootName);
if (ruleDescription.getFilter() != null) {
rdElement.appendChild(serializeFilter(doc, ruleDescription.getFilter()));
}
if (ruleDescription.getAction() != null) {
rdElement.appendChild(serializeRuleAction(doc, ruleDescription.getAction()));
}
if (ruleDescription.getName() != null) {
rdElement.appendChild(
doc.createElementNS(ManagementClientConstants.SB_NS, "Name")
.appendChild(doc.createTextNode(ruleDescription.getName())).getParentNode());
}
return rdElement;
}
private static Element serializeFilter(Document doc, Filter filter) throws ServiceBusException {
if (filter instanceof TrueFilter) {
return serializeSqlFilter(doc, (SqlFilter) filter, "TrueFilter");
} else if (filter instanceof FalseFilter) {
return serializeSqlFilter(doc, (SqlFilter) filter, "FalseFilter");
} else if (filter instanceof SqlFilter) {
return serializeSqlFilter(doc, (SqlFilter) filter, "SqlFilter");
} else if (filter instanceof CorrelationFilter) {
return serializeCorrelationFilter(doc, (CorrelationFilter) filter);
}
return null;
}
private static Element serializeSqlFilter(Document doc, SqlFilter filter, String filterName) {
Element filterElement = doc.createElementNS(ManagementClientConstants.SB_NS, "Filter");
filterElement.setAttributeNS(ManagementClientConstants.XML_SCHEMA_INSTANCE_NS, "type", filterName);
filterElement.appendChild(
doc.createElementNS(ManagementClientConstants.SB_NS, "SqlExpression")
.appendChild(doc.createTextNode(filter.getSqlExpression())).getParentNode());
return filterElement;
}
private static Element serializeCorrelationFilter(Document doc, CorrelationFilter filter) throws ServiceBusException {
if (filter.getProperties() != null) {
throw new ServiceBusException(false, new UnsupportedOperationException("Correlation rules with custom properties "
+ "is not yet implemented with ManagementClient"));
}
Element filterElement = doc.createElementNS(ManagementClientConstants.SB_NS, "Filter");
filterElement.setAttributeNS(ManagementClientConstants.XML_SCHEMA_INSTANCE_NS, "type", "CorrelationFilter");
if (filter.getCorrelationId() != null) {
filterElement.appendChild(
doc.createElementNS(ManagementClientConstants.SB_NS, "CorrelationId")
.appendChild(doc.createTextNode(filter.getCorrelationId())).getParentNode());
}
if (filter.getMessageId() != null) {
filterElement.appendChild(
doc.createElementNS(ManagementClientConstants.SB_NS, "MessageId")
.appendChild(doc.createTextNode(filter.getMessageId())).getParentNode());
}
if (filter.getTo() != null) {
filterElement.appendChild(
doc.createElementNS(ManagementClientConstants.SB_NS, "To")
.appendChild(doc.createTextNode(filter.getTo())).getParentNode());
}
if (filter.getReplyTo() != null) {
filterElement.appendChild(
doc.createElementNS(ManagementClientConstants.SB_NS, "ReplyTo")
.appendChild(doc.createTextNode(filter.getReplyTo())).getParentNode());
}
if (filter.getLabel() != null) {
filterElement.appendChild(
doc.createElementNS(ManagementClientConstants.SB_NS, "Label")
.appendChild(doc.createTextNode(filter.getLabel())).getParentNode());
}
if (filter.getSessionId() != null) {
filterElement.appendChild(
doc.createElementNS(ManagementClientConstants.SB_NS, "SessionId")
.appendChild(doc.createTextNode(filter.getSessionId())).getParentNode());
}
if (filter.getReplyToSessionId() != null) {
filterElement.appendChild(
doc.createElementNS(ManagementClientConstants.SB_NS, "ReplyToSessionId")
.appendChild(doc.createTextNode(filter.getReplyToSessionId())).getParentNode());
}
if (filter.getContentType() != null) {
filterElement.appendChild(
doc.createElementNS(ManagementClientConstants.SB_NS, "ContentType")
.appendChild(doc.createTextNode(filter.getContentType())).getParentNode());
}
// todo: serialize custom parameters.
return filterElement;
}
private static Element serializeRuleAction(Document doc, RuleAction ruleAction) {
if (ruleAction instanceof SqlRuleAction) {
Element filterElement = doc.createElementNS(ManagementClientConstants.SB_NS, "Action");
filterElement.setAttributeNS(ManagementClientConstants.XML_SCHEMA_INSTANCE_NS, "type", "SqlRuleAction");
filterElement.appendChild(
doc.createElementNS(ManagementClientConstants.SB_NS, "SqlExpression")
.appendChild(doc.createTextNode(((SqlRuleAction) ruleAction).getSqlExpression())).getParentNode());
return filterElement;
} else {
throw new UnsupportedOperationException("Rule action of type '" + ruleAction.getClass().getName() + "' is not implemented");
}
}
static List parseCollectionFromContent(String xml) {
ArrayList ruleList = new ArrayList<>();
try {
DocumentBuilderFactory dbf = SerializerUtil.getDocumentBuilderFactory();
DocumentBuilder db = dbf.newDocumentBuilder();
Document dom = db.parse(new ByteArrayInputStream(xml.getBytes("utf-8")));
Element doc = dom.getDocumentElement();
doc.normalize();
NodeList entries = doc.getChildNodes();
for (int i = 0; i < entries.getLength(); i++) {
Node node = entries.item(i);
if (node.getNodeName().equals("entry")) {
ruleList.add(parseFromEntry(node));
}
}
} catch (ParserConfigurationException | IOException | SAXException e) {
if (TRACE_LOGGER.isErrorEnabled()) {
TRACE_LOGGER.info("Exception while parsing response.", e);
}
if (TRACE_LOGGER.isDebugEnabled()) {
TRACE_LOGGER.debug("XML which failed to parse: \n %s", xml);
}
}
return ruleList;
}
static RuleDescription parseFromContent(String xml) throws MessagingEntityNotFoundException {
try {
DocumentBuilderFactory dbf = SerializerUtil.getDocumentBuilderFactory();
DocumentBuilder db = dbf.newDocumentBuilder();
Document dom = db.parse(new ByteArrayInputStream(xml.getBytes(UTF_8)));
Element doc = dom.getDocumentElement();
doc.normalize();
if ("entry".equals(doc.getTagName())) {
return parseFromEntry(doc);
}
} catch (ParserConfigurationException | IOException | SAXException e) {
if (TRACE_LOGGER.isErrorEnabled()) {
TRACE_LOGGER.info("Exception while parsing response.", e);
}
if (TRACE_LOGGER.isDebugEnabled()) {
TRACE_LOGGER.debug("XML which failed to parse: \n %s", xml);
}
}
throw new MessagingEntityNotFoundException("Rule was not found");
}
private static RuleDescription parseFromEntry(Node xEntry) {
RuleDescription rd = null;
NodeList nList = xEntry.getChildNodes();
for (int i = 0; i < nList.getLength(); i++) {
Node node = nList.item(i);
if (node.getNodeType() == Node.ELEMENT_NODE) {
Element element = (Element) node;
switch (element.getTagName()) {
case "title":
rd = new RuleDescription(element.getFirstChild().getNodeValue());
break;
case "content":
NodeList qdNodes = element.getFirstChild().getChildNodes();
for (int j = 0; j < qdNodes.getLength(); j++) {
node = qdNodes.item(j);
if (node.getNodeType() == Node.ELEMENT_NODE) {
element = (Element) node;
switch (element.getTagName()) {
case "Name":
rd.setName(element.getFirstChild().getNodeValue());
break;
case "Filter":
rd.setFilter(parseFilterFromElement(element));
break;
case "Action":
rd.setAction(parseActionFromElement(element));
break;
default:
break;
}
}
}
break;
default:
break;
}
}
}
return rd;
}
private static Filter parseFilterFromElement(Element element) {
NamedNodeMap attributes = element.getAttributes();
String type = null;
for (int i = 0; i < attributes.getLength(); i++) {
Node attributeNode = attributes.item(i);
if (attributeNode.getNodeName().endsWith("type")) {
type = attributeNode.getNodeValue();
break;
}
}
if (type == null) {
return null;
}
switch (type) {
case "SqlFilter":
return parseSqlFilterFromElement(element);
case "CorrelationFilter":
return parseCorrelationFilterFromElement(element);
case "TrueFilter":
return new TrueFilter();
case "FalseFilter":
return new FalseFilter();
default:
return null;
}
}
private static Filter parseSqlFilterFromElement(Element filterElement) {
NodeList nList = filterElement.getChildNodes();
for (int i = 0; i < nList.getLength(); i++) {
Node node = nList.item(i);
if (node.getNodeType() == Node.ELEMENT_NODE) {
Element element = (Element) node;
switch (element.getTagName()) {
case "SqlExpression":
return new SqlFilter(element.getFirstChild().getNodeValue());
default:
break;
}
}
}
return null;
}
private static Filter parseCorrelationFilterFromElement(Element filterElement) {
CorrelationFilter filter = new CorrelationFilter();
NodeList nList = filterElement.getChildNodes();
for (int i = 0; i < nList.getLength(); i++) {
Node node = nList.item(i);
if (node.getNodeType() == Node.ELEMENT_NODE) {
Element element = (Element) node;
switch (element.getTagName()) {
case "CorrelationId":
filter.setCorrelationId(element.getFirstChild().getNodeValue());
break;
case "MessageId":
filter.setMessageId(element.getFirstChild().getNodeValue());
break;
case "To":
filter.setTo(element.getFirstChild().getNodeValue());
break;
case "ReplyTo":
filter.setReplyTo(element.getFirstChild().getNodeValue());
break;
case "Label":
filter.setLabel(element.getFirstChild().getNodeValue());
break;
case "SessionId":
filter.setSessionId(element.getFirstChild().getNodeValue());
break;
case "ReplyToSessionId":
filter.setReplyToSessionId(element.getFirstChild().getNodeValue());
break;
case "ContentType":
filter.setContentType(element.getFirstChild().getNodeValue());
break;
default:
break;
// todo: parse properties
}
}
}
return filter;
}
private static RuleAction parseActionFromElement(Element element) {
NamedNodeMap attributes = element.getAttributes();
String type = null;
for (int i = 0; i < attributes.getLength(); i++) {
Node attributeNode = attributes.item(i);
if (attributeNode.getNodeName().endsWith("type")) {
type = attributeNode.getNodeValue();
break;
}
}
if (type == null) {
return null;
}
switch (type) {
case "SqlRuleAction":
return parseSqlActionFromElement(element);
default:
return null;
}
}
private static RuleAction parseSqlActionFromElement(Element filterElement) {
NodeList nList = filterElement.getChildNodes();
for (int i = 0; i < nList.getLength(); i++) {
Node node = nList.item(i);
if (node.getNodeType() == Node.ELEMENT_NODE) {
Element element = (Element) node;
switch (element.getTagName()) {
case "SqlExpression":
return new SqlRuleAction(element.getFirstChild().getNodeValue());
default:
break;
}
}
}
return null;
}
}
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