package com.bhle.access.util;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import javax.xml.namespace.QName;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;
public class Dc {
private Document doc;
public Dc(URL url) throws IOException {
this(url.openStream());
}
public Dc(InputStream inputStrem) {
try {
DocumentBuilderFactory domFactory = DocumentBuilderFactory
.newInstance();
domFactory.setNamespaceAware(true);
DocumentBuilder builder = domFactory.newDocumentBuilder();
this.doc = builder.parse(inputStrem);
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (ParserConfigurationException e) {
e.printStackTrace();
}
}
public String getId() {
return (String) evaluateXpath("//dc:identifier/text()",
XPathConstants.STRING);
}
private Object evaluateXpath(String xpathExpression, QName returnType) {
Object result = "";
try {
XPathFactory factory = XPathFactory.newInstance();
XPath xpath = factory.newXPath();
xpath.setNamespaceContext(new MyNamespaceContext());
XPathExpression expr = xpath.compile(xpathExpression);
Object obj = expr.evaluate(doc, returnType);
result = obj;
} catch (XPathExpressionException e) {
e.printStackTrace();
}
return result;
}
}