1 files changed, 138 insertions, 0 deletions
diff --git a/src/com/benlinskey/grdbc/SyntaxParser.java b/src/com/benlinskey/grdbc/SyntaxParser.java
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+/* Copyright 2013 Benjamin Linskey
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.benlinskey.grdbc;
+
+import java.io.IOException;
+import java.io.StringReader;
+import java.io.StringWriter;
+import java.io.UnsupportedEncodingException;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerConfigurationException;
+import javax.xml.transform.TransformerException;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.dom.DOMSource;
+import javax.xml.transform.stream.StreamResult;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+
+import edu.unc.epidoc.transcoder.TransCoder;
+
+/**
+ * Parses XML from the Overview of Greek Syntax text and converts Beta Code to
+ * Greek characters.
+ * @author Ben Linskey
+ *
+ */
+public class SyntaxParser {
+	private Document doc;
+	private TransCoder transcoder;
+	
+	public SyntaxParser(String xml) 
+			throws ParserConfigurationException, SAXException, IOException {
+		// Parse the XML and create a Document.
+		DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
+		DocumentBuilder db = dbf.newDocumentBuilder();
+		InputSource is = new InputSource(new StringReader(xml));
+		doc = db.parse(is);
+		
+		// Create a TransCoder for converting Beta Code to Greek characters.
+		try {
+			transcoder = new TransCoder("BetaCode", "UnicodeC");
+		} catch (Exception e) {
+			e.printStackTrace();
+			System.exit(1);
+		}
+	}
+	
+	/**
+	 * Returns the XML for this section, with all Beta Code converted to Greek
+	 * characters.
+	 * @return	the XML for this section with all Beta Code converted to Greek
+	 * 			characters
+	 */
+	public String transcode() {
+		transcodeInElements("quote");
+		transcodeInElements("foreign");
+		return getUpdatedXML();
+	}
+	
+	/**
+	 * Transcodes beta code to Greek in elements with the given name.
+	 * @param element	the name of the element to search for
+	 */
+	private void transcodeInElements(String element) {
+		NodeList nodeList = doc.getElementsByTagName(element);
+		for (int i = 0; i < nodeList.getLength(); i++) {
+			Node elementNode = nodeList.item(i);
+			Node langAttr = elementNode.getAttributes().getNamedItem("lang");
+			if (langAttr != null) {
+				String lang = langAttr.getTextContent();
+				if (lang.equals("greek")) {
+					String greek = betaToGreek(elementNode.getTextContent());
+					langAttr.setTextContent(greek);
+				}
+			}
+		}
+	}
+	
+	/**
+	 * Returns a string containing an XML representation of the document in its 
+	 * current state.
+	 * @return	a string containing an XML representation of the document in its 
+	 * 			current state
+	 */
+	private String getUpdatedXML() {
+		StringWriter writer = new StringWriter();
+		try {
+			TransformerFactory tf = TransformerFactory.newInstance();
+			Transformer transformer = tf.newTransformer();
+			DOMSource source = new DOMSource(doc);
+			StreamResult result = new StreamResult(writer);
+			transformer.transform(source, result);
+		} catch (TransformerConfigurationException e) {
+			e.printStackTrace();
+			System.exit(1);
+		} catch (TransformerException e) {
+			e.printStackTrace();
+			System.exit(1);
+		}
+		return writer.toString();
+	}
+	
+	/**
+	 * Converts Beta Code to Greek characters.
+	 * @param beta	the Beta Code to transcode
+	 * @return	the Greek equivalent of the specified Beta Code
+	 */
+	private String betaToGreek(String beta) {
+		String greek = null;
+		try {
+			greek = transcoder.getString(beta); 
+		} catch (UnsupportedEncodingException e) {
+			e.printStackTrace();
+			System.exit(1);
+		}
+		return greek;
+	}
+}