Joined: Mar 24, 2008
Posts: 1
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hello all,
i have a styledText object from which i get a stylerange array str1,i need to serialize this array so that i can store it in a database:
here is the code:
| Code: |
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyleRange;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.sql.*;
import java.util.Arrays;
public class StyledTextSample implements Serializable
{
Display display = new Display();
Shell shell = new Shell(display);
Connection conn;
DataBaseClass dbobject;
StyledText styledText;
transient StyleRange str1[];
Connection con = null;
ResultSet rs;
int iRowCount = 0;
PreparedStatement pstmt = null;
Statement stmt = null;
String sDriver =
"org.apache.derby.jdbc.ClientDriver";
String sURL =
"jdbc:derby://localhost:1527/ArrayDB;create=true;user=root;password=muskvar";
private void writeObject(ObjectOutputStream out) throws IOException
{
out.defaultWriteObject();
}
private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException
{
in.defaultReadObject();
}
public StyledTextSample() throws IOException, ClassNotFoundException
{
shell.setLayout(new GridLayout());
styledText = new StyledText(shell, SWT.MULTI | SWT.WRAP | SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
styledText.setLayoutData(new GridData(GridData.FILL_BOTH));
StyleRange styleRange1 = new StyleRange();
styledText.setText("123456789abcdefgh");
styleRange1.start = 0;
styleRange1.length = 5;
styleRange1.font=new Font(shell.getDisplay(), "Courier New", 12, SWT.BOLD);
styleRange1.underline=true;
styleRange1.foreground = shell.getDisplay().getSystemColor(SWT.COLOR_BLUE);
styleRange1.background = shell.getDisplay().getSystemColor(SWT.COLOR_YELLOW);
styleRange1.fontStyle = SWT.BOLD;
StyleRange styleRange2 = new StyleRange();
styleRange2.start = 6;
styleRange2.length = 2;
styleRange2.fontStyle = SWT.NORMAL;
styleRange2.font=new Font(shell.getDisplay(), "Arial Black", 20, SWT.BOLD);
styleRange2.foreground = shell.getDisplay().getSystemColor(SWT.COLOR_YELLOW);
styleRange2.background = shell.getDisplay().getSystemColor(SWT.COLOR_BLUE);
StyleRange styleRange3 = new StyleRange();
styleRange3.start = 8;
styleRange3.length = 2;
styleRange3.fontStyle = SWT.NORMAL;
styleRange3.font=new Font(shell.getDisplay(), "Arial Black", 20, SWT.BOLD);
//styleRange2.foreground=new Color(display, 255,0,0);
styleRange3.foreground = shell.getDisplay().getSystemColor(SWT.COLOR_YELLOW);
styleRange3.background = shell.getDisplay().getSystemColor(SWT.COLOR_BLUE);
StyleRange styleRange4 = new StyleRange();
styleRange4.start = 6;
styleRange4.length = 4;
styleRange4.fontStyle = SWT.NORMAL;
styleRange4.font=new Font(shell.getDisplay(), "Arial Black", 20, SWT.BOLD);
styleRange4.foreground = shell.getDisplay().getSystemColor(SWT.COLOR_YELLOW);
styleRange4.background = shell.getDisplay().getSystemColor(SWT.COLOR_BLUE);
styledText.setStyleRange(styleRange1);
styledText.setStyleRange(styleRange2);
styledText.setStyleRange(styleRange3);
styledText.setStyleRange(styleRange4);
System.out.println(printStyleRanges(styledText.getStyleRanges()));
System.out.println("---------------------------");
str1=styledText.getStyleRanges();
ByteArrayOutputStream os = new ByteArrayOutputStream();
ObjectOutputStream out = new ObjectOutputStream( os );
//writeObject( out );
out.writeObject(str1);
out.flush();
byte[] blob = os.toByteArray();
try // Attempt to load the JDBC driver
{ // with newInstance
Class.forName( sDriver ).newInstance();
}
catch( Exception e ) // error
{
System.err.println(
"Failed to load current driver.");
return;
} // end catch
try
{
con = DriverManager.getConnection(sURL);
stmt = con.createStatement();
}
catch ( Exception e)
{
System.err.println( "problems connecting to " +
sURL + ":" );
System.err.println( e.getMessage() );
if( con != null)
{
try { con.close(); }
catch( Exception e2 ) {}
}
return;
} // end catch
// store 'blob' in your database
// writeBlob( blob );
// DESERIALIZING
// read the serialized array
try
{
stmt.executeUpdate( "DROP TABLE TeeArray" );
System.out.println(
"Table TeeColor was removed.");
}
catch ( Exception e ) { /* don't care */ }
try
{
// may need modification for your database
stmt.executeUpdate( "CREATE TABLE TeeArray (" +
"TCArray BLOB (100K) NOT NULL" +")" );
System.out.println(
"Table TeeColor was created.");
pstmt = con.prepareStatement(
"INSERT INTO TeeArray VALUES(?)");
pstmt.setBytes(1,blob);
pstmt.executeUpdate();
System.out.println( iRowCount +
" Rows inserted into TeeColor.");
}
catch ( Exception e )
{
System.err.println(
"problem with SQL sent to " + sURL + ":" );
System. err.println( e.getMessage() );
}
shell.setSize(300, 120);
shell.open();
// Set up the event loop.
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
// If no more entries in event queue
display.sleep();
}
}
display.dispose();
}
private String printStyleRanges(StyleRange[] styleRanges) {
if(styleRanges == null)
return "null";
else if(styleRanges.length == 0)
return "[]";
StringBuffer sb = new StringBuffer();
for(int i=0; i<styleRanges.length; i++) {
sb.append(styleRanges[i] + "\n");
}
return sb.toString();
}
public static void main(String[] args) throws IOException, ClassNotFoundException {
new StyledTextSample();
}
}
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i get the following exception stacktrace:
StyleRange {0, 5, fontStyle=bold, font=Font {738856535}, foreground=Color {0, 0, 255}, background=Color {255, 255, 0}, underlined}
StyleRange {6, 4, fontStyle=normal, font=Font {67767043}, foreground=Color {255, 255, 0}, background=Color {0, 0, 255}}
Exception in thread "main" java.io.NotSerializableException: org.eclipse.swt.custom.StyleRange
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeArray(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at StyledTextSample.<init>(StyledTextSample.java:186)
at StyledTextSample.main(StyledTextSample.java:613)
please help me,
thank you. |
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