jreepad-cvs Mailing List for Jreepad - Java Treepad Editor

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Update of /cvsroot/jreepad/jreepad/src/jreepad/io
In directory sc8-pr-cvs6.sourceforge.net:/tmp/cvs-serv31373/src/jreepad/io

Modified Files:
	AutoDetectReader.java XmlReader.java XmlWriter.java 
Log Message:
Using SAX for reading and writing XML

Index: AutoDetectReader.java
===================================================================
RCS file: /cvsroot/jreepad/jreepad/src/jreepad/io/AutoDetectReader.java,v
retrieving revision 1.3
retrieving revision 1.4
diff -C2 -d -r1.3 -r1.4
*** AutoDetectReader.java	28 Sep 2007 14:29:22 -0000	1.3
--- AutoDetectReader.java	28 Sep 2007 21:54:41 -0000	1.4
***************
*** 58,76 ****
          if (currentLine.startsWith("<?xml"))
          {
-             // Try and find out what character encoding to use
-             int encPos = currentLine.indexOf("encoding=");
-             String xmlEncoding = null;
-             if (encPos != -1)
-             {
-                 xmlEncoding = currentLine.substring(encPos + 10);
-                 encPos = xmlEncoding.indexOf("\"");
-                 if (encPos == -1)
-                     encPos = xmlEncoding.indexOf("'");
-                 if (encPos != -1)
-                     xmlEncoding = xmlEncoding.substring(0, encPos);
-                 // System.out.println("Start of XML loading: decided on the following character
-                 // encoding: " + xmlEncoding);
-             }
-             xmlReader.setEncoding(xmlEncoding);
              return xmlReader.read(in);
          }
--- 58,61 ----

Index: XmlReader.java
===================================================================
RCS file: /cvsroot/jreepad/jreepad/src/jreepad/io/XmlReader.java,v
retrieving revision 1.4
retrieving revision 1.5
diff -C2 -d -r1.4 -r1.5
*** XmlReader.java	3 Apr 2007 12:41:30 -0000	1.4
--- XmlReader.java	28 Sep 2007 21:54:41 -0000	1.5
***************
*** 20,27 ****
  package jreepad.io;

- import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStream;
! import java.io.InputStreamReader;

  import jreepad.JreepadArticle;
--- 20,29 ----
  package jreepad.io;

  import java.io.IOException;
  import java.io.InputStream;
! 
! import javax.xml.parsers.ParserConfigurationException;
! import javax.xml.parsers.SAXParser;
! import javax.xml.parsers.SAXParserFactory;

  import jreepad.JreepadArticle;
***************
*** 30,33 ****
--- 32,39 ----
  import jreepad.JreepadTreeModel;

+ import org.xml.sax.Attributes;
+ import org.xml.sax.SAXException;
+ import org.xml.sax.helpers.DefaultHandler;
+ 
  /**
   * Reads XML input into Jreepad.
***************
*** 37,273 ****
  public class XmlReader implements JreepadReader
  {
!     private String encoding;
! 
!     public XmlReader()
!     {
!         this(null);
!     }
! 
!     public XmlReader(String encoding)
!     {
!         this.encoding = encoding;
!     }

      public JreepadTreeModel read(InputStream in)
          throws IOException
      {
!         BufferedReader reader = new BufferedReader(new InputStreamReader(in, encoding));
! 
!         String currentLine;
!         String currentXmlContent = "";
!         int nodeTagOffset = 0;
! 
!         // Spool until we're at the very first node
!         while ((currentLine = reader.readLine()) != null
!             && (nodeTagOffset = currentXmlContent.indexOf("<node")) == -1
!             && (nodeTagOffset == -1 || currentXmlContent.indexOf('>', nodeTagOffset) == -1))
          {
!             currentXmlContent += (currentLine + "\n");
          }
-         if (currentLine != null)
-             currentXmlContent += (currentLine + "\n");
- 
-         // System.out.println("XMLparse: I've spooled to the first node and content is now: " +
-         // currentXmlContent);
- 
-         // So currentXmlContent now contains all of the opening tag, including its attributes etc
-         // Strip off anything BEFORE the node opening
-         currentXmlContent = currentXmlContent.substring(nodeTagOffset);
- 
-         // System.out.println("XMLparse: I've stripped anything before the first node and content is
-         // now: " + currentXmlContent);

!         JreepadTreeModel document = new JreepadTreeModel(readNode(reader, currentXmlContent, 0).node);
          document.setFileType(JreepadPrefs.FILETYPE_XML);
-         document.setEncoding(encoding);
          return document;
      }

!     // This function should return any XML string content that remains unprocessed
!     // Also returns newly created node
!     ReturnValue readNode(BufferedReader reader, String currentXmlContent, int depth)
!         throws IOException
      {

!         // System.out.println("XMLparse recursive: depth "+depth);
! 
!         // String currentXmlContent should BEGIN with the <node> tag. This is assumed, and if not
!         // true may cause problems!
!         String currentLine;
!         int titleOffset, typeOffset, startTagOffset, endTagOffset;
!         String title, typeString, content = "";
!         JreepadNode node = new JreepadNode();
! 
!         // Extract the attributes
!         titleOffset = currentXmlContent.indexOf("title=");
!         typeOffset = currentXmlContent.indexOf("type=");
!         if (titleOffset != -1)
!             title = currentXmlContent.substring(titleOffset + 7, currentXmlContent.indexOf('"',
!                 titleOffset + 7));
!         else
!             title = "<Untitled node>";
!         if (typeOffset != -1)
!             typeString = currentXmlContent.substring(typeOffset + 6, currentXmlContent.indexOf('"',
!                 typeOffset + 6));
!         else
!             typeString = "text/plain";
! 
!         if (typeString.equals("text/csv"))
!             node.getArticle().setArticleMode(JreepadArticle.ARTICLEMODE_CSV);
!         else if (typeString.equals("text/html"))
!             node.getArticle().setArticleMode(JreepadArticle.ARTICLEMODE_HTML);
!         else if (typeString.equals("text/textile"))
!             node.getArticle().setArticleMode(JreepadArticle.ARTICLEMODE_TEXTILEHTML);
!         //else if (typeString.equals("application/x-jreepad-softlink"))
!         //    node.setArticleMode(JreepadArticle.ARTICLEMODE_SOFTLINK);
!         else
!             node.getArticle().setArticleMode(JreepadArticle.ARTICLEMODE_ORDINARY);
! 
!         node.setTitle(xmlUnescapeChars(title));
! 
!         // OK, so we've interpreted the attributes etc. Now we need to trim the opening tag away
!         currentXmlContent = currentXmlContent.substring(currentXmlContent.indexOf('>') + 1);
! 
!         // System.out.println("XMLparse: I've stripped off the <node> tag and content is now: " +
!         // currentXmlContent);
! 
!         boolean readingContent = true; // Once the baby nodes come in, we're not interested in
!         // adding any more to the content
!         while ((currentLine = reader.readLine()) != null)
          {
!             // System.out.println("XMLparserecursive: Here's a line: " + currentLine);
!             currentLine += "\n"; // We want to keep the newlines, but the BufferedReader doesn't
!             // give us them
! 
!             // We're reading CONTENT into the current node.
!             currentXmlContent += currentLine;
! 
!             // System.out.println("\n\nThe content that I'm currently trying to process
!             // is:\n"+currentXmlContent);
! 
!             // Look out for <node which tells us we're starting a child
!             startTagOffset = currentXmlContent.indexOf("<node");
!             // Look out for </node> which tells us we're finishing this node and returning to the
!             // parent
!             endTagOffset = currentXmlContent.indexOf("</node>");
! 
!             while (!(startTagOffset == -1 || endTagOffset == -1))
!             {
!                 if (startTagOffset == -1 || endTagOffset < startTagOffset)
!                 {
!                     // Process the nearest end tag
!                     if (readingContent)
!                         content += xmlUnescapeChars(currentXmlContent.substring(0, endTagOffset));
!                     String returnFromBaby = currentXmlContent.substring(endTagOffset + 7);
!                     // System.out.println("\n\nBaby intends to return:"+returnFromBaby);
!                     node.getArticle().setContent(content);
!                     return new ReturnValue(returnFromBaby, node);
!                 }
!                 else
!                 {
!                     if (readingContent)
!                     {
!                         content += xmlUnescapeChars(currentXmlContent.substring(0, startTagOffset));
!                         node.getArticle().setContent(content);
!                     }
! 
!                     // Having found a child node, we want to STOP adding anything to the current
!                     // node's content (e.g. newlines...)
!                     readingContent = false;
! 
!                     // Process the nearest start tag
!                     // System.out.println("\n\nJust before passing to baby: content
!                     // is:\n"+currentXmlContent);
!                     ReturnValue returnValue = readNode(reader, currentXmlContent
!                         .substring(startTagOffset), depth + 1);
!                     currentXmlContent = returnValue.xmlContent;
!                     // System.out.println("\n\nJust after passing to baby: content
!                     // is:\n"+currentXmlContent);
!                     node.add(returnValue.node);
!                 }
! 
!                 startTagOffset = currentXmlContent.indexOf("<node");
!                 endTagOffset = currentXmlContent.indexOf("</node>");
!             }
! 
!         } // End while
! 
!         // Just make sure we haven't wasted any content...
!         endTagOffset = currentXmlContent.indexOf('<');
!         if (readingContent && (endTagOffset != -1))
!             content += xmlUnescapeChars(currentXmlContent.substring(0, endTagOffset));
!         node.getArticle().setContent(content);
!         // System.out.println("THE MAIN WHILE LOOP HAS ENDED. SPARE CONTENT:\n" +
!         // currentXmlContent);
!         return new ReturnValue("", node);
!     }
! 
!     private static String xmlUnescapeChars(String in)
!     {
!         char[] c = in.toCharArray();
!         StringBuffer ret = new StringBuffer();
!         StringBuffer entity = new StringBuffer();
!         String ent;

!         int i, j;
!         OuterLoop: for (i = 0; i < c.length; i++)
!             if (c[i] == '&')
!             {
!                 entity = new StringBuffer();
!                 for (j = 0; j < 8; j++) // Add things into the entity buffer until we hit a
!                 // semicolon
!                 {
!                     i++;
!                     if (i == c.length)
!                     {
!                         ret.append('&' + entity.toString());
!                         continue OuterLoop;
!                     }
!                     else if (c[i] != ';')
!                         entity.append(c[i]);
!                     else
!                         break; // Reached end of the entity (or end of the whole string!)
!                 }
!                 ent = entity.toString();
!                 if (ent.equals("lt"))
!                     ret.append("<");
!                 else if (ent.equals("gt"))
!                     ret.append(">");
!                 else if (ent.equals("amp"))
!                     ret.append("&");
!                 else if (ent.equals("quot"))
!                     ret.append("\"");
!                 else
!                     ret.append('&' + ent + ';');
!             }
!             else
!                 ret.append(c[i]);

!         return ret.toString();
!     }

!     public String getEncoding()
!     {
!         return encoding;
!     }

!     public void setEncoding(String encoding)
!     {
!         this.encoding = encoding;
!     }

!     /**
!      * Container class to make it possible to return two objects from readNode().
!      */
!     private static class ReturnValue
!     {
!         public String xmlContent;

!         public JreepadNode node;

!         public ReturnValue(String xmlContent, JreepadNode node)
          {
!             this.xmlContent = xmlContent;
!             this.node = node;
          }
      }
--- 43,131 ----
  public class XmlReader implements JreepadReader
  {
!     public static final String NODE_TAG = "node";
!     public static final String TITLE_ATTRIBUTE = "title";
!     public static final String TYPE_ATTRIBUTE = "type";

      public JreepadTreeModel read(InputStream in)
          throws IOException
      {
!         SAXParserFactory factory = SAXParserFactory.newInstance();
!         Handler handler = null;
!         try
          {
!             SAXParser parser = factory.newSAXParser();
!             handler = new Handler();
!             parser.parse(in, handler);
!         }
!         catch (ParserConfigurationException e)
!         {
!             throw new IOException(e);
!         }
!         catch (SAXException e)
!         {
!             throw new IOException(e);
          }

!         JreepadTreeModel document = new JreepadTreeModel(handler.getRoot());
          document.setFileType(JreepadPrefs.FILETYPE_XML);
          return document;
      }

!     private class Handler extends DefaultHandler
      {
+         JreepadNode root = null;
+         JreepadNode currentNode = null;
+         StringBuffer content = null;
+         int articleMode;

!         public void characters(char[] ch, int start, int length) throws SAXException
          {
!             if (content != null)
!                 content.append(ch, start, length);
!         }

!         public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException
!         {
!             if (!qName.equals(NODE_TAG))
!                 throw new SAXException("Unknown tag " + qName);

!             // Save node content
!             if (currentNode != null && content != null)
!                 currentNode.getArticle().setContent(content.toString());
!             content = new StringBuffer();

!             String title = attributes.getValue(TITLE_ATTRIBUTE);
!             String type = attributes.getValue(TYPE_ATTRIBUTE);

!             JreepadNode newNode = new JreepadNode(title, "");
!             if (currentNode != null)
!                 currentNode.add(newNode);
!             currentNode = newNode;
!             if (root == null)
!                 root = currentNode;

!             int articleMode = JreepadArticle.ARTICLEMODE_ORDINARY;
!             if (type.equals("text/csv"))
!                 articleMode = JreepadArticle.ARTICLEMODE_CSV;
!             else if (type.equals("text/html"))
!                 articleMode = JreepadArticle.ARTICLEMODE_HTML;
!             else if (type.equals("text/textile"))
!                 articleMode = JreepadArticle.ARTICLEMODE_TEXTILEHTML;
!             //else if (type.equals("application/x-jreepad-softlink"))
!             //    articleMode = JreepadArticle.ARTICLEMODE_SOFTLINK;
!             currentNode.getArticle().setArticleMode(articleMode);
!         }

!         public void endElement(String uri, String localName, String qName) throws SAXException
!         {
!             if (content != null)
!                 currentNode.getArticle().setContent(content.toString());
!             currentNode = currentNode.getParentNode();
!             content = null;
!         }

!         public JreepadNode getRoot()
          {
!             return root;
          }
      }

Index: XmlWriter.java
===================================================================
RCS file: /cvsroot/jreepad/jreepad/src/jreepad/io/XmlWriter.java,v
retrieving revision 1.5
retrieving revision 1.6
diff -C2 -d -r1.5 -r1.6
*** XmlWriter.java	26 Mar 2007 11:49:24 -0000	1.5
--- XmlWriter.java	28 Sep 2007 21:54:41 -0000	1.6
***************
*** 22,33 ****
  import java.io.IOException;
  import java.io.OutputStream;
- import java.io.OutputStreamWriter;
- import java.io.Writer;
  import java.util.Enumeration;

  import jreepad.JreepadArticle;
  import jreepad.JreepadNode;
  import jreepad.JreepadTreeModel;

  /**
   * Writes the Jreepad tree as XML.
--- 22,40 ----
  import java.io.IOException;
  import java.io.OutputStream;
  import java.util.Enumeration;

+ import javax.xml.transform.TransformerConfigurationException;
+ import javax.xml.transform.sax.SAXTransformerFactory;
+ import javax.xml.transform.sax.TransformerHandler;
+ import javax.xml.transform.stream.StreamResult;
+ 
  import jreepad.JreepadArticle;
  import jreepad.JreepadNode;
  import jreepad.JreepadTreeModel;

+ import org.xml.sax.ContentHandler;
+ import org.xml.sax.SAXException;
+ import org.xml.sax.helpers.AttributesImpl;
+ 
  /**
   * Writes the Jreepad tree as XML.
***************
*** 38,46 ****
      implements JreepadWriter
  {
!     private String encoding;

!     public XmlWriter(String encoding)
      {
!         this.encoding = encoding;
      }

--- 45,58 ----
      implements JreepadWriter
  {
!     public static final String NODE_TAG = "node";
!     public static final String TITLE_ATTRIBUTE = "title";
!     public static final String TYPE_ATTRIBUTE = "type";
!     public static final String NSU = "";
!     private AttributesImpl attributes = new AttributesImpl();

!     public XmlWriter()
      {
!         attributes.addAttribute("", "", TITLE_ATTRIBUTE, "", "");
!         attributes.addAttribute("", "", TYPE_ATTRIBUTE, "", "");
      }

***************
*** 48,117 ****
          throws IOException
      {
!         Writer writer = new OutputStreamWriter(out, encoding);
!         writer.write("<?xml version=\"1.0\" encoding=\"" + encoding + "\"?>\n");
!         writeNode(writer, document.getRootNode(), 0, true);
!         writer.close();
      }

!     private void writeNode(Writer writer, JreepadNode node, int depth, boolean includeChildren) throws IOException
      {
!         writer.write("<node ");
!         if (depth == 0)
!             writer.write("xmlns=\"http://jreepad.sourceforge.net/formats\" ");
!         writer.write("title=\"" + xmlEscapeChars(node.getTitle()) + "\" type=\"");

          switch (node.getArticle().getArticleMode())
          {
          case JreepadArticle.ARTICLEMODE_HTML:
!             writer.write("text/html");
              break;
          case JreepadArticle.ARTICLEMODE_TEXTILEHTML:
!             writer.write("text/textile");
              break;
          case JreepadArticle.ARTICLEMODE_CSV:
!             writer.write("text/csv");
              break;
          default:
!             writer.write("text/plain");
              break;
          }
-         writer.write("\">");
-         writer.write(xmlEscapeChars(node.getContent()));
-         if (includeChildren)
-         {
-             Enumeration kids = node.children();
-             while (kids.hasMoreElements())
-                 writeNode(writer, (JreepadNode)kids.nextElement(), depth + 1,
-                     includeChildren);
-         }
-         writer.write("</node>\n");
-     }

!     public String getEncoding()
!     {
!         return encoding;
!     }

!     public void setEncoding(String encoding)
!     {
!         this.encoding = encoding;
!     }

!     private static String xmlEscapeChars(String in)
!     {
!         char[] c = in.toCharArray();
!         StringBuffer ret = new StringBuffer();
!         for (int i = 0; i < c.length; i++)
!             if (c[i] == '<')
!                 ret.append("&lt;");
!             else if (c[i] == '>')
!                 ret.append("&gt;");
!             else if (c[i] == '&')
!                 ret.append("&amp;");
!             else if (c[i] == '"')
!                 ret.append("&quot;");
!             else
!                 ret.append(c[i]);
!         return ret.toString();
      }
  }
--- 60,124 ----
          throws IOException
      {
!         StreamResult result = new StreamResult(out);
!         SAXTransformerFactory factory = (SAXTransformerFactory)SAXTransformerFactory.newInstance();
!         TransformerHandler handler;
!         try
!         {
!              handler = factory.newTransformerHandler();
!         }
!         catch (TransformerConfigurationException e)
!         {
!             throw new IOException(e);
!         }
!         handler.setResult(result);
! 
!         try
!         {
!             write(handler, document);
!         }
!         catch (SAXException e)
!         {
!             throw new IOException(e);
!         }
      }

!     private void write(ContentHandler handler, JreepadTreeModel document) throws SAXException
      {
!         handler.startDocument();
!         writeNode(handler, document.getRootNode());
!         handler.endDocument();
!     }

+     private void writeNode(ContentHandler handler, JreepadNode node) throws SAXException
+     {
+         String type;
          switch (node.getArticle().getArticleMode())
          {
          case JreepadArticle.ARTICLEMODE_HTML:
!             type = "text/html";
              break;
          case JreepadArticle.ARTICLEMODE_TEXTILEHTML:
!             type = "text/textile";
              break;
          case JreepadArticle.ARTICLEMODE_CSV:
!             type = "text/csv";
              break;
          default:
!             type = "text/plain";
              break;
          }

!         attributes.setValue(0, node.getTitle());
!         attributes.setValue(1, type);

!         handler.startElement(NSU, NODE_TAG, NODE_TAG, attributes);
!         String content = node.getContent();
!         handler.characters(content.toCharArray(), 0, content.length());

!         Enumeration kids = node.children();
!         while (kids.hasMoreElements())
!             writeNode(handler, (JreepadNode)kids.nextElement());
! 
!         handler.endElement(NSU, NODE_TAG, NODE_TAG);
      }
  }

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