XMLMetaのパーサーを作成 Impl WIP

utils/src/main/java/one/nem/lacerta/utils/impl/XmlMetaParserImpl.java

@@ -1,16 +1,93 @@
 package one.nem.lacerta.utils.impl;
 
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.xml.sax.InputSource;
+
+import java.io.StringReader;
+import java.nio.file.Path;
+import java.util.ArrayList;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+
 import one.nem.lacerta.model.document.internal.XmlMetaModel;
+import one.nem.lacerta.model.document.internal.XmlMetaPageModel;
 import one.nem.lacerta.utils.XmlMetaParser;
 
 public class XmlMetaParserImpl implements XmlMetaParser{
     @Override
     public XmlMetaModel parse(String xml) {
-        return null;
+        try {
+            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
+            DocumentBuilder builder = factory.newDocumentBuilder();
+            Document document = builder.parse(new InputSource(new StringReader(xml)));
+
+            Element rootElement = document.getDocumentElement();
+
+            XmlMetaModel meta = new XmlMetaModel();
+
+            meta.setTitle(rootElement.getElementsByTagName("title").item(0).getTextContent());
+            meta.setAuthor(rootElement.getElementsByTagName("author").item(0).getTextContent());
+            meta.setDescription(rootElement.getElementsByTagName("description").item(0).getTextContent());
+            meta.setDefaultBranch(rootElement.getElementsByTagName("defaultBranch").item(0).getTextContent());
+
+            ArrayList<XmlMetaPageModel> pages = new ArrayList<>();
+            for(int i = 0; i < rootElement.getElementsByTagName("pages").getLength(); i++) {
+                Element pageElement = (Element) rootElement.getElementsByTagName("page").item(i);
+                XmlMetaPageModel page = new XmlMetaPageModel();
+                page.setIndex(Integer.parseInt(pageElement.getElementsByTagName("index").item(0).getTextContent()));
+                page.setFilename(pageElement.getElementsByTagName("filename").item(0).getTextContent());
+                pages.add(page);
+            }
+
+            meta.setPages(pages);
+
+            return meta;
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        return null; // TODO-rca: 例外
     }
 
     @Override
     public String serialize(XmlMetaModel meta) {
-        return null;
+        try {
+            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
+            DocumentBuilder builder = factory.newDocumentBuilder();
+            Document document = builder.newDocument();
+
+            Element rootElement = document.createElement("meta");
+
+            appendElement(document, rootElement, "title", meta.getTitle());
+            appendElement(document, rootElement, "author", meta.getAuthor());
+            appendElement(document, rootElement, "description", meta.getDescription());
+            appendElement(document, rootElement, "defaultBranch", meta.getDefaultBranch());
+
+            Element pagesElement = document.createElement("pages");
+            for(XmlMetaPageModel page : meta.getPages()) {
+                Element pageElement = document.createElement("page");
+                appendElement(document, pageElement, "index", String.valueOf(page.getIndex()));
+                appendElement(document, pageElement, "filename", page.getFilename());
+                pagesElement.appendChild(pageElement);
+            }
+
+            rootElement.appendChild(pagesElement);
+
+            document.appendChild(rootElement);
+
+            return document.toString();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        return null; // TODO-rca: 例外
+    }
+
+    // Internal Methods
+    private Element appendElement(Document document, Element rootElement, String name, String textContent) {
+        Element element = document.createElement(name);
+        element.setTextContent(textContent);
+        rootElement.appendChild(element);
+        return element;
     }
 }