/*
* 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.streams.sysomos.data;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import java.io.ByteArrayInputStream;
import java.util.ArrayList;
import java.util.List;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
/**
* Represents Heatbeat metadata from the Sysomos API.
*/
public class HeartbeatInfo {
private Document doc;
private List<SysomosTagDefinition> tags;
/**
* HeartbeatInfo constructor.
* @param xmlString xmlString
* @throws Exception Exception
*/
public HeartbeatInfo(String xmlString) throws Exception {
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = dbFactory.newDocumentBuilder();
this.doc = docBuilder.parse(new InputSource(new ByteArrayInputStream(xmlString.getBytes("utf-8"))));
this.tags = new ArrayList<SysomosTagDefinition>();
createTagDefinitions();
}
private void createTagDefinitions() {
this.tags = new ArrayList<SysomosTagDefinition>();
NodeList tagList = this.doc.getElementsByTagName("tag");
for (int i = 0; i < tagList.getLength(); ++i) {
Node tag = tagList.item(i);
SysomosTagDefinition tagDefinition = createSysomosTagDefinitionFromNode(tag);
if (this.hasTagName(tagDefinition.getTagName())) {
SysomosTagDefinition otherTag = this.getTagWithTagName(tagDefinition.getTagName());
if (!otherTag.getDisplayName().equals(tagDefinition.getDisplayName())) {
throw new RuntimeException("A single tag ("
+ otherTag.getTagName()
+ ") has multiple display names ("
+ otherTag.getDisplayName()
+ " , "
+ tagDefinition.getDisplayName()
+ ")");
} else {
List<String> otherQueries = otherTag.getQueries();
for (String query : tagDefinition.getQueries()) {
if (!otherQueries.contains(query)) {
otherTag.addQuery(query);
}
}
}
} else {
this.tags.add(tagDefinition);
}
}
}
private SysomosTagDefinition createSysomosTagDefinitionFromNode(Node tag) {
Element tagElement = (Element) tag;
SysomosTagDefinition tagDefinition = new SysomosTagDefinition(tagElement.getElementsByTagName("name").item(0).getTextContent(),
tagElement.getElementsByTagName("displayName").item(0).getTextContent());
NodeList taggingRule = tagElement.getElementsByTagName("taggingRule");
for (int i = 0; i < taggingRule.getLength(); ++i) {
Element rule = (Element) taggingRule.item(i);
NodeList queries = rule.getElementsByTagName("query");
for (int j = 0; j < queries.getLength(); ++j) {
Element query = (Element) queries.item(j);
tagDefinition.addQuery(query.getTextContent());
}
}
return tagDefinition;
}
/**
* hasTagName.
* @param tagName tagName
* @return hasTagName
*/
public boolean hasTagName(String tagName) {
for (SysomosTagDefinition tag : this.tags) {
if (tag.hasTagName(tagName)) {
return true;
}
}
return false;
}
/**
* getTagWithTagName.
* @param tagName tagName
* @return SysomosTagDefinition
*/
public SysomosTagDefinition getTagWithTagName(String tagName) {
for (SysomosTagDefinition tag : this.tags) {
if (tag.hasTagName(tagName)) {
return tag;
}
}
return null;
}
}