Using normal java classes to access database

Dear friends,
Is it a good practice to make database calls from a normal java class within J2EE environment.
What I meant by a normal java class is a class which is not an enterprise bean.
Best Regards,
Chamal.

it is quite normal.
If you make your own DAOs, it may not be efficient/generic.
JSP/Servlets can use Hibernate (which is a set of POJOs) to access DB. Thus you have a J2EE environment using a very matured DB access methodoloy, and doing away with Enterprise bean.
regards

Similar Messages

Access a normal java class from EJB

how can i access normal java class from an EJB.
I do not want to write the business logic inside the EJB. How can I achieve this.

There's no special API for doing this. Just use normal java. E.g.
@Stateless
public class FooBean implements Foo {
public void foo() {
// access non-EJB utility class Bar
Bar b = new Bar();
b.bar();
}

AES Algorithm error when trying to encrypt using stored Java class.

Dear All,
We have a specific reuirement where in we cannot use DBMS_CRYPTO package to encrypt/decrypt data using AES Algorithm
So I am trying to use a stored Java class and I am getting "AES algorithm not available".
I am using Oracle 10gR2 standard edition.
Below is my code
1. Stored Java class
2. Stored function to access the above Java class.
3. Test anonymus PL/SQL to test above code.
Please help me finding the problem why I am getting "AES algorithm not available" error when I call stored Java class in Oracle.?
**** If I use "DES" algorithm, it works. Also the Java code works well if I execute it as normal Java class from Eclipse.
I verified the java.security file in jre/lib/security and I see that there is provider entry for SunJCE.
The jre version in Oracle is 1.4.2.
I appreciate your help.
Thanks,
Priyanka
Step1: Stored java class to encrypt and decrypt data
CREATE OR REPLACE AND RESOLVE JAVA SOURCE NAMED "EncryptUtil" AS
import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
public class EncryptUtil
     public static String encrypt(String inStr)
     String outStr = "Test data 123";
try
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128);
SecretKey skey = kgen.generateKey();
byte[] raw = skey.getEncoded();
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
byte[] encrypted =
cipher.doFinal(inStr.getBytes());
outStr =new String(encrypted);
catch (Exception e)
     outStr = outStr + "exception thrown::" + e.getMessage();
e.printStackTrace();
return outStr;
Step2: Stored function to access above stored java class.
CREATE OR REPLACE FUNCTION SF_ENCRYPTUTIL(
pKey1 VARCHAR2
) RETURN VARCHAR2 AS
LANGUAGE JAVA NAME 'EncryptUtil.encrypt(java.lang.String ) return java.lang.String';
Step3: Test encryption and descryption
DECLARE
outstr VARCHAR2(2000);
BEGIN
DBMS_OUTPUT.PUT_LINE('outstr-->' || SF_ENCRYPTUTIL('12345'));
END;
Below code example using DBMS_CRYPTO. This works, but we do not want to use this.
declare
l_in_val varchar2(2000) := 'Test data 123';
l_mod number := dbms_crypto.ENCRYPT_AES128
+ dbms_crypto.CHAIN_CBC
+ dbms_crypto.PAD_PKCS5;
l_enc raw (2000);
l_enc_key raw (2000);
l_dec raw (2000);
begin
l_enc := dbms_crypto.encrypt
UTL_I18N.STRING_TO_RAW (l_in_val, 'AL32UTF8'),
l_mod,
HEXTORAW('156ae12300ccfbeb48e43aa016febb36'),
HEXTORAW('001122230405060708090a0b0c0d0e0f')
dbms_output.put_line ('Encrypted='||l_enc);
end;
Edited by: user5092433 on Sep 10, 2009 12:26 AM

I guess I'd be a bit curious about why you can't use a DBMS_CRYPTO solution that provides identical output. It seems odd to want to have a procedure running inside Oracle and then dictate that it has to be Java and not PL/SQL...
I verified the java.security file in jre/lib/security and I see that there is provider entry for SunJCE.
The jre version in Oracle is 1.4.2.Which java.security file are you talking about? The JVM that is inside the Oracle database does not and can not use configuration files that are outside the database. I suspect when you talk about files and paths that you're looking at a JVM outside the database, which is not the JVM that your Java stored procedure would be using.
Looking at the error, my assumption is that some JAR file needs to be loaded into the internal JVM in order for the AES algorithm to be available. But I'm unfortunately not familiar enough with these classes to say what that would be.
Justin

Load java class into the database 10g

Hi ,
We have a program which creates pdf files by using bi publisher.for this program we r using some java package to create a directory in unix whenever invoiceprint program runs.
Now i need to load this class into database,so how can i load this class into database.
I got some samples and docs from google but i was confused with those wether i should load from Oracle/applmgr user.
So Could any one please tell me how can i load java class into oracle database.
I am verymuch thankful for your kind help.Its an emergency issue for me.
Thanks,
YMR

Hi,
http://www.oracle-training.cc/teas_elite_util9.htm
SS

Give all servlet capabilities to a normal java class

am new to servlets, i have one servlet class only, say index.java, in this servlet i have overridden its doGet/doPost where in those methods i just
create an instance of a normal java class say MyClass, am looking to make MyClass to have same capabilities like my index servlet, in other words
am wondering what parameters i need to pass to the MyClass constructor so that MyClass can do all what the index servlet does?
for the time been i am passing the HttpServletRequest and HttpServletResponse, but later i have a situation that i needed to know the path for a file
where i found that i should use ServletContext.getRealPath, so i found that extra ServletContext that should be passed to MyClass, so what exactly i need
to pass to MyClass so that it has all servlet functionalities?

Dariyoosh wrote:
akkadation wrote:
am wondering what parameters i need to pass to the MyClass constructor so that MyClass can do all what the index servlet does?so that MyClass can do all what the index servlet does = MyClass is also a servlet (maybe even the same servlet)There is one instance of the servlet which is created once, after that there are threads launched for different sessions, therefore this may not be thread-safe for what you want to do.
You may want to review your application architecture.isnt the servlet thread-safe in its nature?

In terms of scalabilty, will static method in normal java class better than

You only have one copy of the static method in memory, but you have a few copy of the stateless session bean, plus the overhead of those session bean.So isn't static method of normal java class more scalable than stateless session bean.

Then you have to take care of transaction management, connection pooling, etc other ejb services all by your self.
In fact stateless session beans acts more like a static class. They do not get destroyed when remove() method is called on client stub. Similarly they are not always gets created whenever someone calls create() method on home interface!! (Again it's specific to appserver implementation)
Thx.

Call Bean from normal java class

Dear Friends,
Is it ok to call an entity bean or session bean frm normal Java class.
(Java class is in the same application as the beans).
Is there a special way to lookup the beans from normal java classes.
Thanking You,
Chamal.

it is ok and very commonly done.
Note that the simple java program must be running in the same local network. You cannot have the java program and EJBs distributed over internet. (I m not certain of it, but mostly I shoudl be correct. If you have the resources, try it out and let me know)
In most of the cases, EJBs are called by
1. A servlet
2. Another EJB
3. a simple java program.
In the first 2 cases, you can go for Local Interfaces (more so in the second case than the first). The reason being that the the client and server will be in the same JVM (typically the Application server). Thus, in the first case, if the Web container and the ejb container are in the same app server, EJBs can be local.
However, in the third case, it is unlikey that you will have the client runnng and the same jvm as the server, because the app server has its own jvm.
sample code (this method is being called from the main method of a simple java program. it is self explanatory):
public void processRequestForSessionBean()
         System.out.println("REQUEST RECEIVED");
         try
               Hashtable nameHashtable = new Hashtable();
               nameHashtable.put( Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory" );
               nameHashtable.put( Context.PROVIDER_URL, "t3://localhost:7001" );
               InitialContext context = new InitialContext(nameHashtable);
               System.out.println("created initial context");
               Object lookupObject = context.lookup("CustomerBean");
               System.out.println("Got the lookup object");
               CustomerDataHome home = (CustomerDataHome) PortableRemoteObject.narrow(lookupObject,
                         Class.forName("com.shiv.business.CustomerDataHome"));
               System.out.println("Home interface");
               customerData = home.create();
               System.out.println("Remote Interface");
               addDataToSB(customerData);
               ArrayList namesList = customerData.getNames();
               System.out.println(namesList.toString());
               //customerData.remove();
          catch (Exception exception)
               System.out.println("FATAL ERRORS");
               exception.printStackTrace();
          }

Which Datatype I have to use for Images in MS-Access Database.

Hi Friends...
I am Atif. I have stucked in a query. Please suggest me.
Which Datatype I have to use for Images in MS-Access Database ?
Thanks in advance..
Regards
Atif

Depends upon whether you are referring to a variable or the data type of the column in which to store the data. For a table you should use an OLE Object. For example, you could use something like the following to store an image into a Access table from a
PictureBox (sans OLE header):
Dim AccessConnection As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=C:\Test Files\db1 XP.mdb")
Dim AccessCommand As New OleDbCommand("INSERT INTO BlobTable (ID, BLOB) " & _
"VALUES (@ID, @BLOBData)", AccessConnection)
Dim PictureMemoryStream As MemoryStream = New MemoryStream()
Form3.PictureBox1.Image.Save(PictureMemoryStream, System.Drawing.Imaging.ImageFormat.Jpeg)
Dim BLOBData(PictureMemoryStream.Length - 1) As Byte
PictureMemoryStream.Position = 0
PictureMemoryStream.Read(BLOBData, 0, PictureMemoryStream.Length)
AccessCommand.Parameters.AddWithValue("ID", 7)
AccessCommand.Parameters.Add("BLOBData", OleDbType.LongVarBinary, BLOBData.Length, DataRowVersion.Current).Value = BLOBData
AccessConnection.Open()
AccessCommand.ExecuteNonQuery()
AccessConnection.Close()
Paul ~~~~ Microsoft MVP (Visual Basic)

Can Java Query An Access Database?

Is it possible to write a Java program that can retrieve data from Microsoft Access tables? If so, how is this accomplished? Are there any tutorials on the subject?

I am not sure about the exact specifics, but what you can do is set up a JDBC-ODBC bridge. What that means is you set up an ODBC DSN for your access database. Then you use sun's jdbcodbc driver to access that ODBC DSN, and they execute normal SQL against that...
Hope that gets you started!
ERic

How to generate the java classes of the database tables

Hi,
I am using Sun One 4 update1 CE for generate java classes of tables from an Oracle database. I have got the database schema file. However, when I right clicked on the database schema file, there is no selection for "Generate Java...".
Besides, when I was trying to use database Schema template from the project tab in the explore window by double click on the project, after following all the procedures of inputing the database url, driver, uername, password, and select the table to generate, the following exception came out:
Tue Jan 28 16:22:28 PST 2003: java.lang.NullPointerException: Posted StackTrace
Annotation: Exception occurred in Request Processor
org.openide.util.RequestProcessor$Holder: Posted StackTrace(task org.netbeans.core.ModuleActions$1@e4b7d3 [-31035, 1, -1])
at org.openide.util.RequestProcessor$Holder.fillInStackTrace(RequestProcessor.java:300)
at java.lang.Throwable.<init>(Throwable.java:195)
at java.lang.Exception.<init>(Exception.java:41)
at org.openide.util.RequestProcessor$Holder.<init>(RequestProcessor.java:280)
at org.openide.util.RequestProcessor$Task.createHolder(RequestProcessor.java:333)
at org.openide.util.RequestProcessor.post(RequestProcessor.java:100)
at org.openide.util.RequestProcessor.post(RequestProcessor.java:73)
at org.netbeans.core.ModuleActions.invokeAction(ModuleActions.java:123)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.openide.explorer.view.TreeView.invokeAction(TreeView.java:878)
at org.openide.explorer.view.TreeView$PopupSupport.mouseClicked(TreeView.java:958)
at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:208)
at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:207)
at java.awt.Component.processMouseEvent(Component.java:5096)
at java.awt.Component.processEvent(Component.java:4890)
at java.awt.Container.processEvent(Container.java:1566)
at java.awt.Component.dispatchEventImpl(Component.java:3598)
at java.awt.Container.dispatchEventImpl(Container.java:1623)
at java.awt.Component.dispatchEvent(Component.java:3439)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3450)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3174)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3095)
at java.awt.Container.dispatchEventImpl(Container.java:1609)
at java.awt.Window.dispatchEventImpl(Window.java:1585)
at java.awt.Component.dispatchEvent(Component.java:3439)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:450)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:197)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)
Tue Jan 28 16:22:28 PST 2003: java.lang.NullPointerException: <no message>
java.lang.NullPointerException
at org.netbeans.modules.projects.ProjectDataObject.add(ProjectDataObject.java:204)
at org.netbeans.modules.projects.AddNewAction.performAction(AddNewAction.java:88)
at org.openide.util.actions.NodeAction.actionPerformed(NodeAction.java:167)
at org.netbeans.core.ModuleActions$1.run(ModuleActions.java:105)
at org.openide.util.Task.run(Task.java:152)
[catch] at org.openide.util.RequestProcessor$ProcessorThread.run(RequestProcessor.java:622)
Any suggestions to the solution of these problems are greatly appreciated. Thanks.
Yi-Xiong

you also could use this to generate java beans out of database tables:
     * Convert SQL type code to corresponding Java class.
     * @param sqlType One of java.sql.Types.xxx.
     * @return Class that corresponds to the given type.
    public static Class toClass(int sqlType) {
        Class result = null;
        switch (sqlType) {
        case Types.BIGINT :
        case Types.INTEGER :
        case Types.SMALLINT :
        case Types.TINYINT :
            result = Integer.class;
            break;
        case Types.BIT :
        case Types.BOOLEAN :
            result = Boolean.class;
            break;
        case Types.CHAR :
            result = Character.class;
            break;
        case Types.DATE :
        case Types.TIMESTAMP :
            result = java.util.Date.class;
            break;
        case Types.DECIMAL :
        case Types.DOUBLE :
        case Types.FLOAT :
            result = BigDecimal.class;
            break;
        case Types.NULL :
            result = null;
            break;
        case Types.LONGVARCHAR :
        case Types.VARCHAR :
        default :
            result = String.class;
            break;
        return result;
    }//toClass()
     * Create a Java bean (source file) to map a database table. The class name is the table name, the bean
     * properties are the table columns. Each column will result in a property with a corresponding set() and
     * get() method.
     * @param connection Database connection to load table from.
     * @param tableName Name of table to create the bean for.
     * @param packageName Name of package for Java class.
     * @param className Name of Java class to create.
     * @param superClass Optional name of super class.
     * @return Java source of container class.
     * @throws SQLException, IOException
     * @see <a href="http://java.sun.com/blueprints/corej2eepatterns/Patterns/DataAccessObject.html">Data Access Object </a>
    public static String getTableBean(Connection connection, String tableName, String packageName, String className, String superClass)
            throws SQLException, IOException {
        String result = null;
        if (connection != null && tableName != null) {
            //read table columns:
            DatabaseMetaData dmd = connection.getMetaData();
            ResultSet resultSet = dmd.getColumns(null, "%", tableName, null);
            Properties props = new Properties();
            if (resultSet != null) {
                while (resultSet.next()) { //for each table
                    String name = resultSet.getString("COLUMN_NAME");
                    int type = resultSet.getInt("DATA_TYPE");
                    props.setProperty(name, ""+type);
                }//next table
            }//else: resultSet unavailable
            Set imports = new HashSet();
            StringBuffer sb1 = new StringBuffer(); //fields
            StringBuffer sb2 = new StringBuffer(); //methods
            StringBuffer sb3 = new StringBuffer(); //toString()
            Enumeration enum = props.keys();
            while (enum.hasMoreElements()) {
                String columnName = (String) enum.nextElement();
                //change first character of column name to lower case:
                String fieldName = columnName.substring(0, 1).toLowerCase() + columnName.substring(1);
                //datat type:
                String stype = props.getProperty(columnName, ""+Types.VARCHAR);
                int type = (new Integer(stype)).intValue();
                Class javaClass = toClass(type);
                String typeName = "String"; //default
                if (javaClass != null) {
                    String javaClassName = javaClass.getName();
                    int lastDot = javaClassName.lastIndexOf('.');
                    if (lastDot >= 0) {
                        typeName = javaClassName.substring(lastDot + 1);
                    if (!javaClassName.startsWith("java.lang.")) {
                        imports.add(javaClassName);
                //field:
                sb1.append("    /** ");
                sb1.append(columnName);
                sb1.append(" */\n");
                sb1.append("    private ");
                sb1.append(typeName);
                sb1.append(" ");
                sb1.append(fieldName);
                sb1.append(" = null;\n");
                //toString() method:
                sb3.append("        sb.append(\",");
                sb3.append(fieldName);
                sb3.append("=\");\n");
                sb3.append("        sb.append(");
                sb3.append(fieldName);
                sb3.append(");\n");
                //set method:
                sb2.append("    /**\n");
                sb2.append("     * Set ");
                sb2.append(columnName);
                sb2.append(".\n     *\n     * @param value ");
                sb2.append(columnName);
                sb2.append(" to set.\n");
                sb2.append("     */\n");
                sb2.append("    public void set");
                sb2.append(columnName);
                sb2.append("(");
                sb2.append(typeName);
                sb2.append(" value) {\n        ");
                sb2.append(fieldName);
                sb2.append(" = value;\n    }\n\n");
                //get method:
                sb2.append("    /**\n");
                sb2.append("     * Get ");
                sb2.append(columnName);
                sb2.append(".\n     *\n     * @return ");
                sb2.append(columnName);
                sb2.append(".\n     */\n");
                sb2.append("    public ");
                sb2.append(typeName);
                sb2.append(" get");
                sb2.append(columnName);
                sb2.append("() {\n");
                sb2.append("        return ");
                sb2.append(fieldName);
                sb2.append(";\n    }\n\n");
            }//next column
            //build class source code:
            StringBuffer sb = new StringBuffer();
            sb.append("/* $Header: /data/iComps/icf/prg/java/src/de/icomps/sql/JDBCUtils.java 9     24.10.03 14:25 Hilpert $ */\n");
            sb.append("package ");
            sb.append(packageName);
            sb.append(";\n\n");
            //import statements:
            Iterator iterator = imports.iterator();
            while (iterator.hasNext()) {
                String jcn = (String) iterator.next();
                sb.append("import ");
                sb.append(jcn);
                sb.append(";\n");
            if (imports.size() > 0) {
                sb.append("\n");
            //class:
            sb.append("/**\n");
            sb.append(" * Container class to store data of one record (row) of table '"+tableName+"'.\n");
            sb.append(" *\n");
            sb.append(" * @version $Revision: 9 $ ($Date: 24.10.03 14:25 $)\n");
            sb.append(" * @author $Author: Hilpert $\n");
            sb.append(" */\n");
            sb.append("public class ");
            sb.append(className);
            if (superClass != null) {
                sb.append(" extends ");
                sb.append(superClass);
            sb.append(" {\n\n");
            //fields:
            sb.append(sb1.toString());
            //methods:
            sb.append("\n\n");
            sb.append(sb2.toString()); //methods
            //overwrite toString() method:
            sb.append("    /**\n");
            sb.append("     * Overwrite super.\n");
            sb.append("     *\n     * @return String representation of the object.\n");
            sb.append("     */\n");
            sb.append("    public String toString() {\n");
            sb.append("        StringBuffer sb = new StringBuffer(super.toString());\n\n");
            sb.append(sb3.toString());
            sb.append("\n        return sb.toString();\n");
            sb.append("    }\n\n");
            sb.append("}//"+className);
            result = sb.toString();
        }//else: input unavailable
        return result;
    }//getTableBean()

Java Class loaded in Database.

hi
I have loaded a Java class into Oracle 8.1.6 database. I have created a procedure (call spec) for calling a method in that class.
It takes 3 parameters (Server ip address, From,To). Actually the purpose of the program is to take parameters and send mails
The Java program uses JavaMail. I have loaded all classes required and the class shows status as valid. When I try to execute the method through a pl/sql procedure it gives the following error.
ERROR at line 1:
ORA-29532: Java call terminated by uncaught Java exception:
java.security.AccessControlException: the Permission
(java.util.PropertyPermission * read,write) has not been granted by
dbms_java.grant_permission to
SchemaProtectionDomain(SANTOSH|PolicyTableProxy(SANTOSH))
ORA-06512: at "SANTOSH.SENDMAIL", line 0
ORA-06512: at line 2
In Dbms_java package there is nothing called grant_permission .
What may have gone wrong ???
Thanks

Maybe you should grant JAVASYSPRIV and JAVAUSERPRIV privilege to your db user
first.
Good luck!
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Santosh Nair ([email protected]):
hi
I have loaded a Java class into Oracle 8.1.6 database. I have created a procedure (call spec) for calling a method in that class.
It takes 3 parameters (Server ip address, From,To). Actually the purpose of the program is to take parameters and send mails
The Java program uses JavaMail. I have loaded all classes required and the class shows status as valid. When I try to execute the method through a pl/sql procedure it gives the following error.
ERROR at line 1:
ORA-29532: Java call terminated by uncaught Java exception:
java.security.AccessControlException: the Permission
(java.util.PropertyPermission * read,write) has not been granted by
dbms_java.grant_permission to
SchemaProtectionDomain(SANTOSH|PolicyTableProxy(SANTOSH))
ORA-06512: at "SANTOSH.SENDMAIL", line 0
ORA-06512: at line 2
In Dbms_java package there is nothing called grant_permission .
What may have gone wrong ???
Thanks<HR></BLOCKQUOTE>
null

Re: Using simple java class in an .war file.

Hi All,
I have a simple question,
Can I access an simple java class from a jsp file that I have written by putting it in the "classes" folder?? What entry should go in the web.xml file?
Here is my directory structure:
sample.war
|
----test.jsp <file>
|
----WEB-INF <folder>
| |
| ----classes<folder>
| | |
| | ----simpleJavaClass.class<file>
| |
| ----lib<folder>
| |
| ----web.xml
I want to access the simpleJavaClass.class from the jsp test.jsp.
Please suggest.
Thanks and regards
Ayusman

It is possible to access the class in u r classes folder from u r jsp file.
For example
<%@ page import="com.test.service.PricingSolution,
com.test.core.PhoneNumber
%>
<% PricingSolution solution = (PricingSolution)session.getAttribute("solution"); %>
This is a simple scriplet example. You do the same using jstl tags also.
--Shinoy

How to use Spatial Java Class to update spatial data?

Hi,
I am new to Oracle and couldn't find enough information on how to update spatial data.
Here are my questions?
1)Where could I find Spatial Java Class Javadoc?
2)I'd like to update spatial data inside a ResultSet.next() loop.
After I got the Geometry object and Point object how do I change the x and y values of Point object and save it back to the database.
3)
GeometryAdapter sdoAdapter = OraSpatialManager.getGeometryAdapter("SDO", "8.1.6", null, STRUCT.class, null, conn);
Can I use the above GeometryAdapter for saving Geometry back to database?
4)
SpatialReference sref = srManager.retrieve(8265);
// SRID = 8265: LAT-LON (NAD 83)
Do I need to create a SpatialReference object and why retrieve the SRID '8256'? Do I have to create SRID '8256'?
Thanks for any help
Gwowen

You can find some sample code that shows you how to do that using
the SDOAPI java library. Look under the "Sample Code" section on
OTN's Spatial page:
http://otn.oracle.com/sample_code/products/spatial/content.html
The sample file SampleNewToSDO.java is what you will need.
hoep this helps,
-LJ

How can i use this java program to access from a jsp page?

import java.io.*;
import java.util.*;
public class FileProcessing
//create a vector container for the input variables
     Vector variables = new Vector();
//create a vector container for the constants
     Vector constants = new Vector();
/*create a string expression container for the equation
     as read from the file */
     String expression = " ";
//create double result container for the final result
     double result = 0;
     public boolean processFile(String filename,String delim)
      //index for values vector
          int num_values = 0;
      //index for constants vector
          int num_constants = 0;
      //current line being read from the external file.
          String curline = " ";
      //start reading from the external file
          try
               FileReader fr = new FileReader(filename);
               BufferedReader br = new BufferedReader(fr);
               while(true)
                    curline = br.readLine();
                    if(curline == null)
                         break;
                //determine the type of current interaction
                    boolean variable = curline.startsWith("input");
                    boolean constant = curline.startsWith("constant");
                    boolean equation = curline.startsWith("equation");
                    boolean output = curline.startsWith("result");
               //on input variables
                    if(variable)
                      StringTokenizer st = new StringTokenizer(curline,delim);
                      int num = st.countTokens();
                      int count=0;
                      while(st.hasMoreTokens())
                           String temp = st.nextToken();
                           if(count==1)
                                byte b[]= new byte[100];
                                System.out.println(temp);
                                System.in.read(b);
                                String inputval = (new String(b)).trim();
                                variables.add(num_values,inputval);
                                num_values++;
                           count++;
                    // on constant values
                    if(constant)
                         StringTokenizer st = new StringTokenizer(curline,delim);
                         int num = st.countTokens();
                         int count = 0;
                         while(st.hasMoreTokens())
                              String temp = st.nextToken();
                              if(count==1)
                                   byte b[]= new byte[100];
                                   System.out.println(temp);
                                   System.in.read(b);
                                   String cons = (new String(b)).trim();
                                   constants.add(num_constants,cons);
                                   num_constants++;
                              count++;
                    // on equation
                    if(equation)
                         StringTokenizer st = new StringTokenizer(curline,delim);
                         int num = st.countTokens();
                         int count = 0;
                         while(st.hasMoreTokens())
                              String temp = st.nextToken();
                              if(count==2)
                                   this.expression = temp;
                              count++;
          // now we are ready to evaluate the expression
                   if(output)
                      org.nfunk.jep.JEP myparser= new org.nfunk.jep.JEP();
                      myparser.setAllowAssignment(true);
                      for(int i=1;i<variables.size()+1;i++)
                         String name = "arg"+Integer.toString(i);
                         myparser.addVariable(name,new Double(variables.get(i-1)
                                            .toString()).doubleValue());
                      for(int i=1;i<constants.size()+1;i++)
                           String name = "arg" +Integer.
                                     toString(i+variables.size());
                           myparser.addConstant(name,new Double(constants.get(i-1).toString()));
               //output is obtained as follows
                      myparser.parseExpression(expression);
                      result = myparser.getValue();
                      System.out.println("Assay value: "+result);
          catch(Exception e)
               System.out.println(e.toString());
          return true;
     public static void main(String[] args)
          FileProcessing fp = new FileProcessing();
          fp.processFile("input.eqn",":");
}here i need to generate the strings like 'enter value1' and respective text boxes dynamically . i should use this java program as business logic and a jsp page for view.
following given is my text file input.eqn
input:enter value1:arg1
input:enter value2:arg2
input:enter value3:arg3
constant:enter constant1:arg4
constant:enter constant2:arg5
equation:enter equation:(arg1+arg2)*(arg3+arg4)*arg5
result:

Why do you double post ? http://forum.java.sun.com/thread.jspa?threadID=646988&tstart=0
Why dint that answer satisfy you ? And why dint you say so in that thread rather than posting the same question again ?
ram.

Using Custom Java Class - WorkflowRegistry.xml

I am using a custom java class in workflow. While executing I am getting errot -
com.waveset.util.WavesetException: Class com.LdapGroupMod is not a WorkflowApplication
It seems from documentation that I need to add this in workflowregistry.xml file. I added the same like given below -
<WorkflowApplication name='Workflow Name'
class='com.LdapGroupMod'>
<Comments>Nothing Here</Comments>
</WorkflowApplication>Even tried restaring the application server but I am still getting same error. Any idea what needs to be done here? or I am missing smething?

Well the first thing would be to read the workflowRegistry.xml file. The header talks about internal and external applications and so on. The crucial part is that any application registered must implement the WorkflowApplication interface (which I guess your class dont do)
I gave up. I am totally baffled by the documentation. I admit it.
What I did was to create an Script action in an Activity where the script used Xpress to invoke my class. It seems to work.

Using normal java classes to access database

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