Getting filter table
Hello
We are having a table-view with two columns as input fields. The requirement is all these values are required to be saved in transparent tables. I can achieve this using getting values of inputfields by passing p_cell_id. accordingly i am modifying the internal table attached to the tableview and then inserting the same to transparent table.
My problem is the filter is active on the columns. Hence there is the possibility that users will input into the input fields and then click save. In such case presently i am looping at entire itab and checking if the values of input field are changed.
Hence is there any way by which I will get filtered table and so that i will loop only in filtered values?
thanks in advance.
Regards
Rajeev
Hi,
to filter your table you can get the values of these inputfields by their IDs also. In all cases the IDs contain 'filter_', eg. 'idoftableview_filter_columnnumber', have a look at your source code in the Browser to find the correct IDs.
With the values of the filter-fields you cansearch for the according sets in your table.
Reagrds,
Sebastian
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* Created on 31 October 2005, 10:20
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public boolean tableExists( String tbname ) {
boolean tbexists = false;
//get the database metadata
try {
dma = con.getMetaData();
catch (SQLException ex) {
System.err.println("database connection: " + ex.getMessage());
//now dump out the names of the tables in the database
String[] types = new String[1];
types[0] = "TABLES"; //set table type mask
//note the %-sign is a wild card (not '*')
try {
tables = dma.getTables(null, null, "%", types);
catch (SQLException ex) {
System.err.println("database connection: " + ex.getMessage());
try {
while ( tables.next() ) {
if ( tbname.equalsIgnoreCase( tables.getString(1) ) ) {
tbexists = true;
catch ( SQLException ex ) {
System.err.println("database connection: " + ex.getMessage());
return tbexists;
// merge tablename using REGEX
public String mergeTblName( String sqlcommand, String tbname ) {
String REGEX = "TABLENAME";
String INPUT = sqlcommand;
String REPLACE = tbname;
Pattern p = Pattern.compile(REGEX);
Matcher m = p.matcher(INPUT); // get a matcher object
INPUT = m.replaceAll(REPLACE);
//System.out.println(INPUT);
return INPUT;
// merge feildnames specific terms using REGEX
public String mergeFldName( Message msg ) {
String sqlcommand;
sqlcommand = "insert into TABLENAME values" +
" ('" + msg.getName() + "', '" + msg.getSurname() + "', " +
msg.getComputerType() + ", '" + msg.getComputerNAL() + "', " +
msg.getHaveMonitor() + ", '" + msg.getMonitorNAL() + "', '" +
msg.getDateOfMsg() + "');";
sqlcommand = mergeTblName( sqlcommand, CurrentAuditTable );
return sqlcommand;
// get users input char
/**public char getChar() {
int i = System.in.read();
while (i != -1) {
// here's your character
char c = (char) i;
i = System.in.read();
return (char) i;
// load the config parameters from config.txt
public void loadDbConfig() {
// make a file obj pointing to the config file config.txt
File configFile = new File( this.configFile );
//...checks on configFile are elided
StringBuffer contents = new StringBuffer();
//declared here only to make visible to finally clause
BufferedReader input = null;
try {
//use buffering
//this implementation reads one line at a time
input = new BufferedReader( new FileReader(configFile) );
String line = null; //not declared within while loop
int count = 0;
while (( line = input.readLine()) != null){
//first line in config file is dbPath
if(count == 0) this.setDbPath( line.trim() );
//second line in config file is ODBCDataSource
if(count == 1) this.setODBCDataSource( line.trim() );
count++;
//contents.append(line);
//contents.append(System.getProperty("line.separator"));
catch (FileNotFoundException ex) {
System.err.println("the file congif.txt cannot be found ...");
System.err.print("Enter the path to db file (e.g. c:\\temp): ");
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
// read the db path from the command-line; need to use try/catch with the
// readLine() method
try {
this.setDbPath( br.readLine() );
catch (IOException ioe) {
System.out.println("IO error trying to read user input.");
System.exit(1);
System.err.print("Enter the name of the ODBC Data Source: ");
// read the ODBC Data Source name from the command-line; need to use try/catch with the
// readLine() method
try {
this.setODBCDataSource( br.readLine() );
catch (IOException ioe) {
System.out.println("IO error trying to read user input.");
System.exit(1);
ex.printStackTrace();
catch (IOException ex){
//ex.printStackTrace();
finally {
try {
if (input!= null) {
//flush and close both "input" and its underlying FileReader
input.close();
catch (IOException ex) {
//ex.printStackTrace();
//return contents.toString();
// get datasource security details i.e. username and password
public void getDSSecurity() {
// get username
System.out.print("Enter username for the ODBC DataSource: ");
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
// read the username from the command-line; need to use try/catch with the
// readLine() method
try {
this.setUsername( br.readLine() );
catch (IOException ioe) {
System.out.println("IO error trying to read username.");
System.exit(1);
// get password
System.out.print("Enter password: ");
// read the username from the command-line; need to use try/catch with the
// readLine() method
try {
this.setPassword( br.readLine() );
catch (IOException ioe) {
System.out.println("IO error trying to read password.");
System.exit(1);
private void dumpResults(String head)
//this is a general routine to print out
//column headers and the contents of each column
System.out.println(head);
try
//get the number of columns from the metadata
this.rsmd = this.tables.getMetaData();
numCols = this.rsmd.getColumnCount();
//print out the column names
for (i = 1; i<= numCols; i++)
System.out.print(rsmd.getColumnName(i)+" ");
System.out.println();
//print out the column contents
boolean more = this.tables.next();
while (more)
for (i = 1; i <= numCols; i++)
System.out.print(this.tables.getString(i)+" ");
System.out.println();
more = this.tables.next();
catch(Exception e)
{System.out.println(e.getMessage());}
/** Creates a new instance of dbManager */
public dbManager() {
this.dbInitialize();
}here is the result when I make a new dbManager obj from my server class which is a multithreaded one.
H:\java>java EchoServer
Enter username for the ODBC DataSource: admin
Enter password: purina123
Tables
TABLE_CAT TABLE_SCHEM TABLE_NAME TABLE_TYPE REMARKS
Listening for clients on 12111...
here is the code of my server class called EchoServer:
import java.net.*;
import java.io.*;
public class EchoServer
ServerSocket m_ServerSocket;
dbManager haDB;
public EchoServer()
// db methods to setup a jdbc connection to the database
haDB = new dbManager();
// list tables
//haDB.listTables();
//haDB.getDBTables();
// create table
//haDB.CreateTable("TestTable2");
// update table
// server code
try
// Create the server socket.
m_ServerSocket = new ServerSocket(12111);
catch(IOException ioe)
System.out.println("Could not create server socket at 12111. Quitting.");
System.exit(-1);
System.out.println("Listening for clients on 12111...");
// Successfully created Server Socket. Now wait for connections.
int id = 0;
while(true)
try
// Accept incoming connections.
Socket clientSocket = m_ServerSocket.accept();
// accept() will block until a client connects to the server.
// If execution reaches this point, then it means that a client
// socket has been accepted.
// For each client, we will start a service thread to
// service the client requests. This is to demonstrate a
// multithreaded server, although not required for such a
// trivial application. Starting a thread also lets our
// EchoServer accept multiple connections simultaneously.
// Start a service thread
ClientServiceThread cliThread = new ClientServiceThread(clientSocket, id++, haDB);
cliThread.start();
catch(IOException ioe)
System.out.println("Exception encountered on accept. Ignoring. Stack Trace :");
ioe.printStackTrace();
public static void main (String[] args)
new EchoServer();
class ClientServiceThread extends Thread
Socket m_clientSocket;
int m_clientID = -1;
dbManager m_db;
boolean m_bRunThread = true;
ClientServiceThread(Socket s, int clientID, dbManager db)
m_clientSocket = s;
m_clientID = clientID;
m_db = db;
public void run()
// Obtain the input stream and the output stream for the socket
// A good practice is to encapsulate them with a BufferedReader
// and a PrintWriter as shown below.
BufferedReader in = null;
PrintWriter out = null;
Message msg = new Message();
// Print out details of this connection
System.out.println("Accepted Client : ID - " + m_clientID + " : Address - " +
m_clientSocket.getInetAddress().getHostName());
try
in = new BufferedReader(new InputStreamReader(m_clientSocket.getInputStream()));
out = new PrintWriter(new OutputStreamWriter(m_clientSocket.getOutputStream()));
// At this point, we can read for input and reply with appropriate output.
// Run in a loop until m_bRunThread is set to false
while(m_bRunThread)
// read incoming stream
String clientCommand = in.readLine();
if ( clientCommand.indexOf(",") != -1 ) {
msg.deserialize( clientCommand );
System.out.println("SQL command: " + m_db.mergeFldName(msg) );
m_db.dbUpdate( m_db.mergeFldName(msg) );
//System.out.println("Name :" + msg.getName() );
//System.out.println("Surname :" + msg.getSurname() );
//System.out.println("ComputerType :" + msg.getComputerType() );
//System.out.println("ComputerNAL :" + msg.getComputerNAL() );
//System.out.println("HaveMonitor :" + msg.getHaveMonitor() );
//System.out.println("Monitor NAL :" + msg.getMonitorNAL() );
//System.out.println("AuditDate :" + msg.getDateOfMsg() );
System.out.println("Client Says :" + clientCommand);
if(clientCommand.equalsIgnoreCase("quit"))
// Special command. Quit this thread
m_bRunThread = false;
System.out.print("Stopping client thread for client : " + m_clientID);
else
// Echo it back to the client.
out.println(clientCommand);
out.flush();
catch(Exception e)
e.printStackTrace();
finally
// Clean up
try
in.close();
out.close();
m_clientSocket.close();
System.out.println("...Stopped");
catch(IOException ioe)
ioe.printStackTrace();
}I find that taking any problem and reducing it to the simplest thing is the best way to approach it.
Why you had to post all that bloody code (especially since you didn't write it) is beyond me.
This will list all the tables in an Access database (or any other, for that matter):
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import org.jdom.Element;
import org.jdom.Document;
import org.jdom.output.XMLOutputter;
public class TableLister
public static final String DRIVER = "sun.jdbc.odbc.JdbcOdbcDriver";
public static final String DATABASE = "jdbc:odbc:DRIVER={Microsoft Access Driver (*.mdb)};DBQ=c:\\Edu\\Java\\Forum\\DataConnection.mdb";
public static final String USERNAME = "admin";
public static final String PASSWORD = "";
public static void main(String [] args)
try
String driver = ((args.length > 0) ? args[0] : DRIVER);
String url = ((args.length > 1) ? args[1] : DATABASE);
String username = ((args.length > 2) ? args[2] : USERNAME);
String password = ((args.length > 3) ? args[3] : PASSWORD);
Class.forName(driver);
Connection conn = DriverManager.getConnection(url, username, password);
DatabaseMetaData meta = conn.getMetaData();
// Bring back ALL tables and views, including SYSTEM tables.
ResultSet tables = meta.getTables(null, null, null, null);
ResultSetMetaData rsmd = tables.getMetaData();
int numColumns = rsmd.getColumnCount();
List columnNames = new ArrayList();
for (int j = 0; j < numColumns; ++j)
columnNames.add(rsmd.getColumnName(j+1));
Element root = new Element("tables");
int tableCount = 0;
while (tables.next())
Element table = new Element("table");
table.setAttribute("id", Integer.toString(++tableCount));
for (int j = 0; j < numColumns; ++j)
Element column = new Element((String)columnNames.get(j));
column.setText(tables.getString((String)columnNames.get(j)));
table.addContent(column);
root.addContent(table);
conn.close();
Document doc = new Document(root);
XMLOutputter outputter = new XMLOutputter(" ", true);
System.out.println(outputter.outputString(doc));
catch (ClassNotFoundException e)
System.err.println("Couldn't load JDBC driver class");
e.printStackTrace();
catch (SQLException e)
System.err.println("SQL state: " + e.getSQLState());
System.err.println("SQL error: " + e.getErrorCode());
e.printStackTrace();
catch (Exception e)
e.printStackTrace();
}Run it and see if it works for you. If it does, put the essence of the code into your stuff.
% -
How to get the table name of a field in a result set
hi!
i have a simple sql query as
select tbl_customerRegistration.*, tbl_customerAddress.address from tbl_customerRegistration, tbl_customerAddress where tbl_customerAddress.customer_id = tbl_customerRegistration.customer_ID
this query executes well and gets data from the database when i get ResultsetMetaData from my result set (having result of above query) i am able to get the field name as
ResultSetMetaData rsmd = rs.getMetaData();//rs is result set
String columnName = rsmd.getColumnName(1);
here i get columnName = "Customer_id"
but when i try to get the tabel name from meta data as
String tableName = rsmd.getTableName(1); i get empty string in table name....
i want to get the table name of the respective field here as it is very important to my logic.....
how can i do that.....
please help me in that regard as it is very urgent
thanks in advance
sajjad ahmed paracha
you may also see the discussion on following link
http://forum.java.sun.com/thread.jspa?threadID=610200&tstart=0So far as I'm aware, you can't get metadata information about the underlying tables in a query from Oracle and/or the Oracle drivers. I suspect, in fact, that the driver would have to have its own SQL parser to get this sort of information.
I'm curious though-- how do you have application logic that depends on the name of the source table but not know in the application what table is involved? Could you do something "cheesy" like
SELECT 'tbl_customerRegistration' AS tbl1_name,
tbl_customerRegistration.*
...Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC
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