Transviewer Bean Example 4c: DBViewer Bean — DBViewSample.java

Installing the Transviewer Bean Samples



public static void main(String[] args) {

try {

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

}

catch (Exception e) {

e.printStackTrace();

}

new DBViewSample();

}

}



XMLDiffSample.java

import oracle.xml.parser.v2.*;

import oracle.xml.async.*;

import oracle.xml.differ.*;

import

import

import

import

import

import



java.io.*;

java.awt.*;

javax.swing.*;

javax.swing.tree.*;

java.net.URL;

java.net.MalformedURLException;



public class XMLDiffSample

{

/**

* Constructor

*/

public XMLDiffSample() {

}

/**

* main

* @param args

*/

public static void main(String[] args)

{

dfxApp = new XMLDiffSample();

diffFrame = new XMLDiffFrame(dfxApp);

diffFrame.addTransformMenu();

xmlDiff = new XMLDiff();

if (args.length == 3)



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outFile = args[2];

/* Use the default outFile name = XMLDiffSample.xsl */

if(args.length >= 2)

dfxApp.showDiffs(new File(args[0]), new File(args[1]));

diffFrame.setVisible(true);

}



public void showDiffs(File file1, File file2)

{

try

{

xmlDiff.setFiles(file1, file2);

/* Check if files are equal */

if(!xmlDiff.diff())

{

JOptionPane.showMessageDialog(diffFrame,

"Files are equivalent in XML representation",

"XMLDiffSample Message",

JOptionPane.PLAIN_MESSAGE);

}

/* generate xsl file */

xmlDiff.generateXSLFile(outFile);

/* parse the xsl file created, alternately you can use

generateXSLDoc to get the xsl as a document tree instead of a file */

parseXSL();

/* Display the document trees created by the xmlDiff object */

diffFrame.makeSrcPane(xmlDiff.getDocument1(), xmlDiff.getDocument2());

diffFrame.makeDiffSrcPane(new XMLDiffSrcView(xmlDiff.getDiffPane1()),

new XMLDiffSrcView(xmlDiff.getDiffPane2()));

diffFrame.makeXslPane(xslDoc, "Diff XSL Script");

diffFrame.makeXslTabbedPane();

}catch (FileNotFoundException e)

{

JOptionPane.showMessageDialog(diffFrame,

"File Not Found: "+e.getMessage(),

"XMLDiffSample Error Message",

JOptionPane.ERROR_MESSAGE);

}

catch (Exception e)

{

e.printStackTrace();



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JOptionPane.showMessageDialog(diffFrame,

"Error: "+e.getMessage(),

"XMLDiffSample Error Message",

JOptionPane.ERROR_MESSAGE);

}

}

public void doXSLTransform()

{

try

{

doc1 = xmlDiff.getDocument1();

doc2 = xmlDiff.getDocument2();

XSLProcessor xslProc = new XSLProcessor();

/* Using the xsl stylesheet generated (xslDoc), transform the first file

(doc1) into the second file (resultDocFrag) */

XMLDocumentFragment resultDocFrag = xslProc.processXSL(new XSLStylesheet

(xslDoc, createURL(outFile)), doc1);

XMLDocument resultDoc = new XMLDocument();

/* The XML declaration has to be copied over to the transformed XML doc,

the xsl will not generate it automatically */

if (doc1.getFirstChild() instanceof XMLDeclPI)

if (doc1.getFirstChild() instanceof XMLDeclPI)

{

XMLNode xmldecl = (XMLNode) resultDoc.importNode(doc1.getFirstChild(),

false);

resultDoc.appendChild(xmldecl);

}

/* Create the DTD node in the transformed XML document */

if(doc1.getDoctype() != null)

{

DTD dtd = (DTD)doc1.getDoctype();

resultDoc.setDoctype(dtd.getName(), dtd.getSystemId(),

dtd.getPublicId());

}

/* Create the result document tree from the document fragment */

resultDoc.appendChild(resultDocFrag);

diffFrame.makeResultFilePane(resultDoc);

} catch (XSLException e)

{

e.printStackTrace();

JOptionPane.showMessageDialog(diffFrame,

"Error: "+e.getMessage(),



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"XMLDiffSample Error Message",

JOptionPane.ERROR_MESSAGE);

}

catch (Exception e)

{

e.printStackTrace();

JOptionPane.showMessageDialog(diffFrame,

"Error:"+e.getMessage(),

"XMLDiffSample Error Message",

JOptionPane.ERROR_MESSAGE);

}

}

/* Parse the XSL file generated into a DOM tree */

protected void parseXSL()

{

try

{

BufferedReader xslFile = new BufferedReader(new FileReader(outFile));

DOMParser domParser = new DOMParser();

domParser.parse(xslFile);

xslDoc = domParser.getDocument();

}catch (FileNotFoundException e)

{

JOptionPane.showMessageDialog(diffFrame,

"File Not Found: "+e.getMessage(),

"XMLDiffSample Message",

JOptionPane.PLAIN_MESSAGE);

}

catch (Exception e)

{

JOptionPane.showMessageDialog(diffFrame,

"Error:"+e.getMessage(),

"XMLDiffSample Error Message",

JOptionPane.ERROR_MESSAGE);

}

}

// create a URL from a file name

protected URL createURL(String fileName)

{

URL url = null;

try

{



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url = new URL(fileName);

}

catch (MalformedURLException ex)

{

File f = new File(fileName);

try

{

String path = f.getAbsolutePath();

// to handle Windows platform

String fs = System.getProperty("file.separator");

if (fs.length() == 1)

{

char sep = fs.charAt(0);

if (sep != '/')

path = path.replace(sep, '/');

if (path.charAt(0) != '/')

path = '/' + path;

}

path = "file://" + path;

url = new URL(path);

}

catch (MalformedURLException e)

{

JOptionPane.showMessageDialog(diffFrame,

"Cannot create url for: " + fileName,

"XMLDiffSample Error Message",

JOptionPane.ERROR_MESSAGE);

}

}

return url;

}

protected

protected

protected

protected

protected

protected

protected



XMLDocument doc1; /* DOM tree for first file */

XMLDocument doc2; /* DOME tree for second file */

static XMLDiffFrame diffFrame; /* GUI frame */

static XMLDiffSample dfxApp; /* XMLDiff sample application */

static XMLDiff xmlDiff;

/* XML diff object */

static XMLDocument xslDoc;

/* parsed xsl file */

static String outFile = new String("XMLDiffSample.xsl"); /* output

xsl file name */



}



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XMLDiffFrame.java

import

import

import

import



java.awt.*;

java.awt.event.*;

java.io.*;

javax.swing.*;



import

import

import

import



oracle.xml.parser.v2.*;

oracle.xml.srcviewer.*;

oracle.xml.differ.*;

org.w3c.dom.*;



public class XMLDiffFrame extends JFrame implements ActionListener {

public XMLDiffFrame(XMLDiffSample dfApp)

{

super();

mydfApp = dfApp;

init();

}



public void makeSrcPane(XMLDocument doc1, XMLDocument doc2)

{

//undo srcviewer highlighting here

XMLSourceView XmlSrcView1 = new XMLSourceView();

XmlSrcView1.setXMLDocument(doc1);

XmlSrcView1.setTagForeground(Color.black);

XmlSrcView1.setAttributeValueForeground(Color.black);

XmlSrcView1.setPIDataForeground(Color.black);

XmlSrcView1.setCommentDataForeground(Color.black);

XmlSrcView1.setCDATAForeground(Color.black);

XmlSrcView1.setBackground(Color.lightGray);

XmlSrcView1.getJTextPane().setBackground(Color.white);

XmlSrcView1.add(new JLabel(filename1,SwingConstants.CENTER),

BorderLayout.NORTH);

XMLSourceView XmlSrcView2 = new XMLSourceView();

XmlSrcView2.setXMLDocument(doc2);

XmlSrcView2.setTagForeground(Color.black);

XmlSrcView2.setAttributeValueForeground(Color.black);

XmlSrcView2.setPIDataForeground(Color.black);

XmlSrcView2.setCommentDataForeground(Color.black);

XmlSrcView2.setCDATAForeground(Color.black);



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XmlSrcView2.setBackground(Color.lightGray);

XmlSrcView2.getJTextPane().setBackground(Color.white);

XmlSrcView2.add(new JLabel(filename2,SwingConstants.CENTER),

BorderLayout.NORTH);

XmlSrcView2.updateUI();

XmlSrcView1.updateUI();

srcPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,

XmlSrcView1, XmlSrcView2);

srcPane.setSize(FRAMEWIDTH,FRAMEHEIGHT);

srcPane.setDividerLocation(0.5);

srcPane.validate();



}

public void makeDiffSrcPane(XMLDiffSrcView srcView1, XMLDiffSrcView srcView2)

{

srcView1.setBackground(Color.lightGray);

srcView2.setBackground(Color.lightGray);

srcView1.add(new

JLabel(filename1,SwingConstants.CENTER),BorderLayout.NORTH);

srcView2.add(new

JLabel(filename2,SwingConstants.CENTER),BorderLayout.NORTH);

JScrollBar vscrollBar = srcView2.getScrollPane().getVerticalScrollBar();

// make the diffSrcView divider fixed.

srcView1.getScrollPane().setVerticalScrollBar(vscrollBar);

srcView1.getScrollPane().setMinimumSize(

new

Dimension(FRAMEWIDTH/2,srcView1.getScrollPane().getPreferredSize().height));

srcView2.getScrollPane().setMinimumSize(

new

Dimension(FRAMEWIDTH/2,srcView2.getScrollPane().getPreferredSize().height));

srcView2.getScrollPane().updateUI();

srcView1.getScrollPane().updateUI();

srcView2.getTextPane().updateUI();

srcView1.getTextPane().updateUI();



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srcView2.updateUI();

srcView1.updateUI();

diffSrcPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,

srcView1, srcView2);

diffSrcPane.setSize(FRAMEWIDTH,FRAMEHEIGHT);

diffSrcPane.setDividerLocation(0.5);

diffSrcPane.validate();

}

public void makeTabbedPane()

{

tabbedPane = new JTabbedPane();

tabbedPane.addTab("SourceView", null , srcPane, "Source View of Files being

Diffed");

tabbedPane.addTab("SourceDiffView", null , diffSrcPane, "Source View of File

Diffs");

tabbedPane.addTab("TreeDiffView", null , diffTreePane, "DOM Tree View of

File Diffs");

tabbedPane.setSelectedIndex(1);

tabbedPane.setSize(FRAMEWIDTH,FRAMEHEIGHT);

this.getContentPane().add(tabbedPane);

this.setVisible(true);



}

public void makeXslPane(XMLDocument doc, String title)

{

xslSrcView = new XMLSourceView();

xslSrcView.setXMLDocument(doc);

xslSrcView.setTagForeground(Color.black);

xslSrcView.setAttributeValueForeground(Color.black);

xslSrcView.setPIDataForeground(Color.black);

xslSrcView.setCommentDataForeground(Color.black);

xslSrcView.setCDATAForeground(Color.black);

xslSrcView.setBackground(Color.lightGray);

xslSrcView.getJTextPane().setBackground(Color.white);

xslSrcView.add(new JLabel(title,SwingConstants.CENTER),

BorderLayout.NORTH);

this.enableTransformItem(true);

}



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public void makeResultFilePane(XMLDocument doc)

{

resultDoc = doc;

XMLSourceView resultSrcView = new XMLSourceView();

resultSrcView.setXMLDocument(doc);

resultSrcView.setTagForeground(Color.black);

resultSrcView.setAttributeValueForeground(Color.black);

resultSrcView.setPIDataForeground(Color.black);

resultSrcView.setCommentDataForeground(Color.black);

resultSrcView.setCDATAForeground(Color.black);

resultSrcView.setBackground(Color.lightGray);

resultSrcView.getJTextPane().setBackground(Color.white);

resultSrcView.add(new JLabel("XSLT Result File",SwingConstants.CENTER),

BorderLayout.NORTH);

tabbedPane.addTab("ResultSourceView", null , resultSrcView,

"Source View of XSLT on File1");

tabbedPane.setSelectedIndex(3);

this.enableSaveAsItem(true);

}

public void makeXslTabbedPane()

{

tabbedPane = new JTabbedPane();

tabbedPane.addTab("SourceView", null , srcPane, "Source View of XML Files

being Diffed");

tabbedPane.addTab("SourceDiffView", null , diffSrcPane, "Source View of File

Diffs");

tabbedPane.addTab("XSL Script",null,xslSrcView, "Source View of Diff XSL

script");

tabbedPane.setSelectedIndex(2);

tabbedPane.setSize(FRAMEWIDTH,FRAMEHEIGHT);

this.getContentPane().add(tabbedPane);

this.setVisible(true);



}

public void actionPerformed(ActionEvent evt)

{



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File selectedFile1, selectedFile2;

BufferedReader file1, file2;

String arg, temp;

if(evt.getSource() instanceof JMenuItem)

{

arg = evt.getActionCommand();

if(arg.equals("Compare XML Files"))

{

JFileChooser jFC = new JFileChooser();

jFC.setCurrentDirectory(new File("."));

int retval = jFC.showOpenDialog(this);

switch (retval)

{

case JFileChooser.APPROVE_OPTION:

selectedFile1 = jFC.getSelectedFile();

temp = selectedFile1.getName();

jFC.cancelSelection();

jFC.updateUI();

switch(jFC.showOpenDialog(this))

{

case JFileChooser.APPROVE_OPTION:

selectedFile2 = jFC.getSelectedFile();

filename2 = selectedFile2.getName();

filename1 = temp;

this.getContentPane().removeAll();

this.enableSaveAsItem(false);

mydfApp.showDiffs(selectedFile1, selectedFile2);

break;

case JFileChooser.CANCEL_OPTION:

break; //filename1 = null; // filename1 also null

}// switch (jFC.showOpenDialog(this))

break;

case JFileChooser.CANCEL_OPTION:

break;

}

}// if(arg.equals("Compare XML Files"))



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else if(arg.equals("Apply XSL to 1st Input File"))

{

mydfApp.doXSLTransform();

}

else if(arg.equals("Save As"))

{

JFileChooser jFC = new JFileChooser();

jFC.setCurrentDirectory(new File("."));

int retval = jFC.showOpenDialog(this);

if (retval == JFileChooser.APPROVE_OPTION)

{

File file = jFC.getSelectedFile();

try

{

resultDoc.print(new FileOutputStream(file));

}catch (IOException e)

{

JOptionPane.showMessageDialog(this,

"Error:"+e.getMessage(),

"XMLDiffer Message",

JOptionPane.PLAIN_MESSAGE);

}



}

}

else if(arg.equals("Exit"))

{

System.exit(0);

}

}

}



public void addTransformMenu()

{

JMenuItem item;

JMenu jmenu = new JMenu("Transform");

item = new JMenuItem("Apply XSL to 1st Input File");

item.addActionListener(this);



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