From afd767bf26c6853c36178e2fc0d091ba1b598fea Mon Sep 17 00:00:00 2001
From: Michael Foiani <sotech117@michaels-mbp-3.lan>
Date: Mon, 5 Apr 2021 14:35:49 -0400
Subject: Added a basic xml parser that deals with local files. TODO: add a url
 one. Also, added some tests to ensure it's ok. Needs some edge case testing
 still.

---
 .../cs/student/term/parsing/LocalXmlParser.java    | 38 ++++++++++++++++++++++
 .../cs/student/term/parsing/UrlXmlParser.java      |  2 ++
 .../brown/cs/student/term/parsing/XmlParser.java   | 37 +++++++++++++++++++++
 3 files changed, 77 insertions(+)
 create mode 100644 src/main/java/edu/brown/cs/student/term/parsing/LocalXmlParser.java
 create mode 100644 src/main/java/edu/brown/cs/student/term/parsing/UrlXmlParser.java
 create mode 100644 src/main/java/edu/brown/cs/student/term/parsing/XmlParser.java

(limited to 'src/main')

diff --git a/src/main/java/edu/brown/cs/student/term/parsing/LocalXmlParser.java b/src/main/java/edu/brown/cs/student/term/parsing/LocalXmlParser.java
new file mode 100644
index 0000000..27c3988
--- /dev/null
+++ b/src/main/java/edu/brown/cs/student/term/parsing/LocalXmlParser.java
@@ -0,0 +1,38 @@
+package edu.brown.cs.student.term.parsing;
+
+import org.w3c.dom.Document;
+import org.xml.sax.SAXException;
+
+import java.io.File;
+import java.io.IOException;
+
+public class LocalXmlParser extends XmlParser {
+  public LocalXmlParser() {
+    super();
+  }
+
+  /**
+   * Method used to parse the xml file.
+   *
+   * @param pathToXml The path to the xml text file.
+   * @return The tree structure parsed as an xml doc.
+   */
+  @Override
+  public Document parse(String pathToXml) {
+    // TODO: change to online hosted file option
+    // Creating the file reference.
+    System.err.println("LOG: To make file reference for " + pathToXml + "  in " + getClass());
+    File file = new File(pathToXml);
+
+    // Parsing the file.
+    try {
+      System.err.println("LOG: Calling builder.parse() in " + getClass());
+      return builder.parse(file);
+    } catch (SAXException e) {
+      System.err.println("INTERNAL: SAX " + getClass() + " : " + e.getClass());
+    } catch (IOException e) {
+      System.err.println("INTERNAL: IO " + getClass() + " : " + e.getClass());
+    }
+    return null;
+  }
+}
diff --git a/src/main/java/edu/brown/cs/student/term/parsing/UrlXmlParser.java b/src/main/java/edu/brown/cs/student/term/parsing/UrlXmlParser.java
new file mode 100644
index 0000000..adad835
--- /dev/null
+++ b/src/main/java/edu/brown/cs/student/term/parsing/UrlXmlParser.java
@@ -0,0 +1,2 @@
+package edu.brown.cs.student.term.parsing;public class UrlXmlParser {
+}
diff --git a/src/main/java/edu/brown/cs/student/term/parsing/XmlParser.java b/src/main/java/edu/brown/cs/student/term/parsing/XmlParser.java
new file mode 100644
index 0000000..d8182d6
--- /dev/null
+++ b/src/main/java/edu/brown/cs/student/term/parsing/XmlParser.java
@@ -0,0 +1,37 @@
+package edu.brown.cs.student.term.parsing;
+
+import org.w3c.dom.Document;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+
+public abstract class XmlParser {
+  protected DocumentBuilder builder = null;
+
+  /**
+   * This constructor crates and saves the builder that turns the xml text into a tree stricture.
+   */
+  protected XmlParser()  {
+    // Builds the immutable factory
+    System.err.println("LOG: Constructor of " + getClass() + ". To make XML parser factory.");
+    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
+    factory.setValidating(true);
+    factory.setIgnoringElementContentWhitespace(true);
+
+    // Creates the builder from the factory
+    try {
+      System.err.println("LOG: To make documentBuilder in " + getClass());
+      builder = factory.newDocumentBuilder();
+    } catch (ParserConfigurationException e) {
+      System.err.println("INTERNAL: " + getClass() + " : " + e.getClass());
+    }
+  }
+
+  /**
+   * Method used to parse the xml file.
+   * @param pathToXml The path to the xml text file.
+   * @return The tree structure parsed as an xml doc.
+   */
+  public abstract Document parse(String pathToXml);
+}
-- 
cgit v1.2.3-70-g09d2