Implemented XMLParser using built-in java implementation

Author: JanHolger

src/main/java/org/javawebstack/abstractdata/xml/LegacyXMLParser.java

@@ -0,0 +1,59 @@
+package org.javawebstack.abstractdata.xml;
+
+import org.w3c.dom.*;
+import org.xml.sax.SAXException;
+
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+
+/*
+This is a temporary implementation using Java's built-in xml implementation
+ */
+public class LegacyXMLParser {
+
+    @Deprecated
+    protected static XMLElement parse(String s) {
+        try {
+            Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(new ByteArrayInputStream(s.getBytes(StandardCharsets.UTF_8)));
+            return convert(document.getDocumentElement());
+        } catch (SAXException | IOException | ParserConfigurationException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private static XMLElement convert(Element element) {
+        String tag = element.getTagName();
+        XMLElement e = new XMLElement(tag);
+        NamedNodeMap attrNodeMap = element.getAttributes();
+        for(int i=0; i<attrNodeMap.getLength(); i++) {
+            String name = attrNodeMap.item(i).getNodeName();
+            String value = ((Attr) attrNodeMap.item(i)).getValue();
+            e.attr(name, value);
+        }
+        NodeList nodeList = element.getChildNodes();
+        for(int i=0; i<nodeList.getLength(); i++) {
+            Node node = nodeList.item(i);
+            switch (node.getNodeType()) {
+                case Node.ATTRIBUTE_NODE: {
+                    Attr attr = (Attr) node;
+                    e.attr(attr.getName(), attr.getValue());
+                    break;
+                }
+                case Node.ELEMENT_NODE: {
+                    e.child(convert((Element) node));
+                    break;
+                }
+                case Node.CDATA_SECTION_NODE:
+                case Node.TEXT_NODE: {
+                    e.child(new XMLTextNode(((Text) node).getData()));
+                    break;
+                }
+            }
+        }
+        return e;
+    }
+
+}

src/main/java/org/javawebstack/abstractdata/xml/XMLElement.java

@@ -49,6 +49,10 @@ public XMLElement text(String text) {
         return this;
     }
 
+    public String attr(String name) {
+        return attributes.get(name);
+    }
+
     public XMLElement attr(String name, String value) {
         if(value == null) {
             attributes.remove(name);
@@ -87,4 +91,8 @@ public List<XMLNode> getChildNodes() {
         return childNodes;
     }
 
+    public static XMLElement from(String xmlString) {
+        return new XMLParser().parse(xmlString);
+    }
+
 }

src/main/java/org/javawebstack/abstractdata/xml/XMLNode.java

@@ -10,4 +10,12 @@ default String toXML(boolean pretty) {
         return new XMLDumper().setPretty(pretty).dump(this);
     }
 
+    default XMLElement asElement() {
+        return (XMLElement) this;
+    }
+
+    default XMLTextNode asTextNode() {
+        return (XMLTextNode) this;
+    }
+
 }

src/main/java/org/javawebstack/abstractdata/xml/XMLParser.java

@@ -0,0 +1,9 @@
+package org.javawebstack.abstractdata.xml;
+
+public class XMLParser {
+
+    public XMLElement parse(String source) {
+        return LegacyXMLParser.parse(source);
+    }
+
+}