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package eu.dnetlib.domain.enabling;
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import java.io.ByteArrayInputStream;
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import java.util.Date;
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import javax.xml.parsers.DocumentBuilder;
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import javax.xml.parsers.DocumentBuilderFactory;
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import javax.xml.parsers.ParserConfigurationException;
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import javax.xml.xpath.XPath;
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import javax.xml.xpath.XPathConstants;
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import javax.xml.xpath.XPathExpression;
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import javax.xml.xpath.XPathFactory;
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import org.apache.log4j.Logger;
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import org.w3c.dom.Document;
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import org.w3c.dom.Node;
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import eu.dnetlib.domain.ActionType;
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import eu.dnetlib.domain.ResourceType;
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public class Notification {
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private static Logger logger = Logger.getLogger(Notification.class);
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private String subscriptionId = null;
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private String message = null;
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private String topic = null;
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private String isId = null;
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private Date date = new Date();
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private ActionType actionType = null;
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private ResourceType resourceType = null;
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private String resource = null;
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private String resourceId = null;
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public Notification(String subscriptionId, String message, String topic,
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String isId) throws Exception {
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super();
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this.subscriptionId = subscriptionId;
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this.message = message;
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this.topic = topic;
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this.isId = isId;
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this.resource = message;
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this.resourceId = this.getField(message, "RESOURCE_IDENTIFIER");
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this.resourceType = ResourceType.valueOf(ResourceType.class, this.getField(message, "RESOURCE_TYPE").toUpperCase());
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this.actionType = ActionType.valueOf(topic.split("\\.")[0]);
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}
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public Notification(String subscriptionId, String resource,
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String resourceId, ResourceType resourceType, ActionType actionType) {
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this.resource = resource;
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this.resourceId = resourceId;
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this.resourceType = resourceType;
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this.actionType = actionType;
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this.subscriptionId = subscriptionId;
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this.message = resource;
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this.topic = actionType.getValue() + "." + resourceType.getValue();
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}
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public String getSubscriptionId() {
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return subscriptionId;
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}
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public String getMessage() {
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return message;
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}
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public String getTopic() {
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return topic;
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}
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public String getIsId() {
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return isId;
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}
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public Date getDate() {
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return date;
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}
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public ActionType getActionType() {
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return actionType;
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}
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public ResourceType getResourceType() {
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return resourceType;
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}
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public String getResource() {
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return resource;
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}
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public String getResourceId() {
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return resourceId;
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}
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private String getField(String xml, String fieldName) throws Exception {
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ByteArrayInputStream bis = new ByteArrayInputStream(xml.getBytes());
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DocumentBuilderFactory domFactory = DocumentBuilderFactory
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.newInstance();
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domFactory.setNamespaceAware(true); // never forget this!
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try {
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DocumentBuilder builder = domFactory.newDocumentBuilder();
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Document doc = builder.parse(bis);
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XPathFactory factory = XPathFactory.newInstance();
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XPath xpath = factory.newXPath();
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XPathExpression expression = xpath.compile("//*[local-name()='"
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+ fieldName + "']");
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Node node = (Node) expression.evaluate(doc, XPathConstants.NODE);
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String value = node.getAttributes().getNamedItem("value").getTextContent();
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logger.debug("Field : " + fieldName + ":" + value);
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return value;
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} catch (ParserConfigurationException e) {
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throw new Exception("XML Parser configuration Error", e);
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}
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}
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}
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