org.glassfish.hk2.xml.internal.DomXmlParser Maven / Gradle / Ivy
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package org.glassfish.hk2.xml.internal;
import java.io.InputStream;
import java.lang.reflect.Array;
import java.net.URI;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import javax.inject.Inject;
import javax.inject.Provider;
import javax.inject.Singleton;
import javax.xml.bind.Unmarshaller.Listener;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.glassfish.hk2.api.DescriptorVisibility;
import org.glassfish.hk2.api.Visibility;
import org.glassfish.hk2.utilities.reflection.ClassReflectionHelper;
import org.glassfish.hk2.xml.jaxb.internal.BaseHK2JAXBBean;
import org.glassfish.hk2.xml.spi.PreGenerationRequirement;
import org.glassfish.hk2.xml.spi.XmlServiceParser;
import org.w3c.dom.Attr;
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.w3c.dom.Text;
/**
* @author jwells
*
*/
@Singleton
@Visibility(DescriptorVisibility.LOCAL)
public class DomXmlParser implements XmlServiceParser {
@Inject
private Provider xmlService;
private final DocumentBuilder documentBuilder;
private DomXmlParser() throws ParserConfigurationException {
documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
}
/* (non-Javadoc)
* @see org.glassfish.hk2.xml.spi.XmlServiceParser#parseRoot(java.lang.Class, java.net.URI, javax.xml.bind.Unmarshaller.Listener)
*/
@SuppressWarnings("unchecked")
@Override
public T parseRoot(Class clazz, URI location, Listener listener)
throws Exception {
ClassReflectionHelper classReflectionHelper = xmlService.get().getClassReflectionHelper();
BaseHK2JAXBBean hk2Root = Utilities.createBean(clazz);
hk2Root._setClassReflectionHelper(classReflectionHelper);
InputStream urlStream = location.toURL().openStream();
Document document;
try {
document = documentBuilder.parse(urlStream);
}
finally {
urlStream.close();
}
Element docElement = document.getDocumentElement();
handleElement(hk2Root, null,
docElement, classReflectionHelper, listener);
return (T) hk2Root;
}
private void handleNode(Node childNode,
Model model,
BaseHK2JAXBBean target,
Listener listener,
ClassReflectionHelper classReflectionHelper,
Map> listChildren,
Map> arrayChildren) {
if (childNode instanceof Element) {
Element childElement = (Element) childNode;
String tagName = childElement.getTagName();
if (model.getNonChildProperties().keySet().contains(tagName)) {
Class childType = model.getNonChildType(tagName);
NodeList childNodeChildren = childElement.getChildNodes();
String valueString = null;
for (int lcv1 = 0; lcv1 < childNodeChildren.getLength(); lcv1++) {
Node childNodeChild = childNodeChildren.item(lcv1);
if (childNodeChild instanceof Text) {
Text childText = (Text) childNodeChild;
valueString = childText.getTextContent().trim();
break;
}
}
Object convertedValue = Utilities.getDefaultValue(valueString, childType);
target._setProperty(tagName, convertedValue);
}
else if (model.getKeyedChildren().contains(tagName) ||
model.getUnKeyedChildren().contains(tagName)) {
ParentedModel informedChild = model.getChild(tagName);
Model grandChild = informedChild.getChildModel();
BaseHK2JAXBBean hk2Root = Utilities.createBean(grandChild.getProxyAsClass());
hk2Root._setClassReflectionHelper(classReflectionHelper);
handleElement(hk2Root, target, childElement, classReflectionHelper, listener);
if (informedChild.getChildType().equals(ChildType.DIRECT)) {
target._setProperty(tagName, hk2Root);
}
else if (informedChild.getChildType().equals(ChildType.LIST)) {
List cList = listChildren.get(tagName);
if (cList == null) {
cList = new ArrayList();
listChildren.put(tagName, cList);
}
cList.add(hk2Root);
}
else if (informedChild.getChildType().equals(ChildType.ARRAY)) {
List cList = arrayChildren.get(tagName);
if (cList == null) {
cList = new LinkedList();
arrayChildren.put(tagName, cList);
}
cList.add(hk2Root);
}
}
else {
// Probably just ignore it
}
}
else if (childNode instanceof Attr) {
Attr childAttr = (Attr) childNode;
String tagName = childAttr.getName();
if (model.getNonChildProperties().keySet().contains(tagName)) {
Class childType = model.getNonChildType(tagName);
String sValue = childAttr.getValue();
Object convertedValue = Utilities.getDefaultValue(sValue, childType);
target._setProperty(tagName, convertedValue);
}
}
}
private void handleElement(BaseHK2JAXBBean target, BaseHK2JAXBBean parent,
Element element, ClassReflectionHelper classReflectionHelper, Listener listener) {
listener.beforeUnmarshal(target, parent);
Map> listChildren = new HashMap>();
Map> arrayChildren = new HashMap>();
Model model = target._getModel();
NamedNodeMap attributeMap = element.getAttributes();
for (int lcv = 0; lcv < attributeMap.getLength(); lcv++) {
Node childNode = attributeMap.item(lcv);
handleNode(childNode, model, target, listener, classReflectionHelper, listChildren, arrayChildren);
}
NodeList beanChildren = element.getChildNodes();
int length = beanChildren.getLength();
for (int lcv = 0; lcv < length; lcv++) {
Node childNode = beanChildren.item(lcv);
handleNode(childNode, model, target, listener, classReflectionHelper, listChildren, arrayChildren);
}
for (Map.Entry> entry : listChildren.entrySet()) {
// Kind of cheating with the erasure, but hey, it works!
target._setProperty(entry.getKey(), entry.getValue());
}
for (Map.Entry> entry : arrayChildren.entrySet()) {
String childTag = entry.getKey();
ParentedModel pn = model.getChild(childTag);
Class childType = pn.getChildModel().getOriginalInterfaceAsClass();
List individuals = entry.getValue();
Object actualArray = Array.newInstance(childType, individuals.size());
int index = 0;
for (BaseHK2JAXBBean individual : individuals) {
Array.set(actualArray, index++, individual);
}
target._setProperty(childTag, actualArray);
}
listener.afterUnmarshal(target, parent);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.xml.spi.XmlServiceParser#getPreGenerationRequirement()
*/
@Override
public PreGenerationRequirement getPreGenerationRequirement() {
return PreGenerationRequirement.LAZY_PREGENERATION;
}
}
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