Initial Commit

iTechSharp/iTextSharp/text/xml/ParserBase.cs

@@ -0,0 +1,99 @@
+using System;
+using System.IO;
+using System.Xml;
+using System.Collections;
+
+namespace iTextSharp.text.xml
+{
+    /// <summary>
+    /// The <CODE>ParserBase</CODE>-class provides XML document parsing.
+    /// </summary>
+    public abstract class ParserBase
+    {
+        public void Parse(XmlDocument xDoc) {
+            string xml = xDoc.OuterXml;
+            StringReader stringReader = new StringReader(xml);
+            XmlTextReader reader = new XmlTextReader(stringReader);
+            this.Parse(reader);
+        }
+
+        public void Parse(XmlTextReader reader) {
+            try {
+                while (reader.Read()) {
+                    switch (reader.NodeType) {
+                        case XmlNodeType.Element:
+                            string namespaceURI = reader.NamespaceURI;
+                            string name = reader.Name;
+                            bool isEmpty = reader.IsEmptyElement;
+                            Hashtable attributes = new Hashtable();
+                            if (reader.HasAttributes) {
+                                for (int i = 0; i < reader.AttributeCount; i++) {
+                                    reader.MoveToAttribute(i);
+                                    attributes.Add(reader.Name,reader.Value);
+                                }
+                            }
+                            this.StartElement(namespaceURI, name, name, attributes);
+                            if (isEmpty) {
+                                EndElement(namespaceURI,
+                                    name, name);
+                            }
+                            break;
+                        case XmlNodeType.EndElement:
+                            EndElement(reader.NamespaceURI,
+                                reader.Name, reader.Name);
+                            break;
+                        case XmlNodeType.Text:
+                            Characters(reader.Value, 0, reader.Value.Length);
+                            break;
+                            // There are many other types of nodes, but
+                            // we are not interested in them
+                        case XmlNodeType.Whitespace:
+                            Characters(reader.Value, 0, reader.Value.Length);
+                            break;
+                    }
+                }
+            } catch (XmlException e) {
+                Console.WriteLine(e.Message);
+            } finally {
+                if (reader != null) {
+                    reader.Close();
+                }
+            }
+        }
+
+        /// <summary>
+        /// Begins the process of processing an XML document
+        /// </summary>
+        /// <param name="url">the XML document to parse</param>
+        public void Parse(string url) {
+            XmlTextReader reader = null;
+            reader = new XmlTextReader(url);
+            this.Parse(reader);
+        }
+
+        /// <summary>
+        /// This method gets called when a start tag is encountered.
+        /// </summary>
+        /// <param name="uri"></param>
+        /// <param name="lname"></param>
+        /// <param name="name">the name of the tag that is encountered</param>
+        /// <param name="attrs">the list of attributes</param>
+        public abstract void StartElement(String uri, String lname, String name, Hashtable attrs);
+
+        /// <summary>
+        /// This method gets called when an end tag is encountered.
+        /// </summary>
+        /// <param name="uri"></param>
+        /// <param name="lname"></param>
+        /// <param name="name">the name of the tag that ends</param>
+        public abstract void EndElement(String uri, String lname, String name);
+
+        /// <summary>
+        /// This method gets called when characters are encountered.
+        /// </summary>
+        /// <param name="content">an array of characters</param>
+        /// <param name="start">the start position in the array</param>
+        /// <param name="length">the number of characters to read from the array</param>
+        public abstract void Characters(string content, int start, int length);
+    }
+}