aQute.lib.xpath.XPathParser Maven / Gradle / Ivy
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package aQute.lib.xpath;
import java.io.File;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.List;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import aQute.lib.converter.Converter;
public class XPathParser {
final static DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
final static XPathFactory xpf = XPathFactory.newInstance();
static DocumentBuilder db;
static XPath xp;
final Document doc;
static {
try {
db = dbf.newDocumentBuilder();
xp = xpf.newXPath();
} catch (Exception e) {
// ignore
}
}
public XPathParser(File file) throws Exception {
doc = db.parse(file);
}
public void parse(String what, Class type, List map) throws XPathExpressionException, Exception {
NodeList proxies = (NodeList) xp.evaluate(what, doc, XPathConstants.NODESET);
for (int i = 0; i < proxies.getLength(); i++) {
Node node = proxies.item(i);
X dto = type.getConstructor()
.newInstance();
parse(node, dto);
map.add(dto);
}
}
public void parse(Node node, X dto) throws Exception {
for (Field f : dto.getClass()
.getFields()) {
if (Modifier.isStatic(f.getModifiers()))
continue;
String value = xp.evaluate(f.getName(), node);
if (value == null || value.isEmpty())
continue;
if (f.getType()
.isAnnotation())
value = value.toUpperCase();
Object o = Converter.cnv(f.getGenericType(), value);
f.set(dto, o);
}
}
public String parse(String expression) throws Exception {
return xp.evaluate(expression, doc);
}
}