StoredProcedure outParameters oracle

Question

Hi, I have a java project where I try to obtain a data type from a Oracle Stored Procedure.
My problem is when I recive the Map (the Map is returned by execute method from StoredProcedure of Spring), the object I have received is a * $Proxy3 * Object and I don't know how to obtain my datas:
In the Oracle data base I have this package:
CREATE OR REPLACE PACKAGE PACKAGE1 AS   TYPE ref_cur IS REF CURSOR;     PROCEDURE myprocedure (name in varchar2, stock_cursor in out ref_cur);   END PACKAGE1; / CREATE OR REPLACE PACKAGE BODY PACKAGE1 AS     PROCEDURE myprocedure (name in varchar2, stock_cursor in out ref_cur)     IS         BEGIN          OPEN stock_cursor FOR 'select                     id,                     name,                     email                   from                     users                  where                   name = '''||name||''' ';                         END myprocedure; END PACKAGE1; /
This procedure can return more of one register. Reason I return a ref cur.
In Java, I try to do this:
1- I have a test class (*Test_Example*), so I can debug step by step.
2- In class (*Example*), called from the test class, is where I define the parameters (in and out) and where I compile and where the execute method is called (Actually the method is running the StoredProcedure class of).
3- I have a class (*GenericProced*) that extends StoredProcedure, where I obtain my datasource.
GenericProced.java
import java.util.Map; import java.util.Properties; import javax.naming.InitialContext; import javax.sql.DataSource; import org.apache.log4j.Logger; import org.springframework.jdbc.object.StoredProcedure; public abstract class GenericProced extends StoredProcedure { public GenericProced(String InitialContextFactory, String providerUrl, String urlPkgPrefixes , String pool, String procedimiento) throws Exception   { super(givemeDatasource ( InitialContextFactory,  providerUrl, urlPkgPrefixes , pool), procedimiento);   }           /* I obtain the datasource from a configuracion file. It runs OK */   public static DataSource givemeDatasource (String InitialContextFactory, String providerUrl, String urlPkgPrefixes , String pool) throws Exception   {     Properties prop = new Properties();     prop.setProperty(InitialContext.INITIAL_CONTEXT_FACTORY,InitialContextFactory);     prop.setProperty(InitialContext.PROVIDER_URL, providerUrl);     prop.setProperty(InitialContext.URL_PKG_PREFIXES,urlPkgPrefixes);             //Creamos un contexto y accedemos al recurso.     InitialContext ic = new InitialContext(prop);     DataSource ds = (DataSource)ic.lookup(pool);     return ds;   }// fin método obtenerConexion.       public abstract void definition ();     public abstract Map execute(Object[] objeto); }
Example.java
import java.sql.ResultSet; import java.sql.SQLException; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import oracle.jdbc.OracleTypes; import org.springframework.jdbc.core.RowMapper; import org.springframework.jdbc.core.SqlOutParameter; import org.springframework.jdbc.core.SqlParameter; import es.indra.isia.PL.ProcedimientoGenerico; public class Example extends GenericProced{ private static final String name_proce = "PACKAGE1.myprocedure "; private static final String name = "name"; private static final String result = "result"; public Example(String InitialContextFactory, String providerUrl, String urlPkgPrefixes , String pool) throws Exception{     super(InitialContextFactory,  providerUrl, urlPkgPrefixes , pool, name_proce);     definition(); } public void definition() { setFunction(false); //Because is a procedure declareParameter(new SqlParameter(name, OracleTypes.VARCHAR)); declareParameter(new SqlOutParameter("result", OracleTypes.CURSOR, new RowMapper(){     public Object mapRow(ResultSet rs, int rowNum) throws SQLException {     MyEntity entity = new MyEntity(     rs.getString("id"),     rs.getString("name"),     rs.getString("email")     ); return entity;                     }               }));               compile(); } public Map execute(Object[] theObject) {                   Map datas = new HashMap();               datas.put(name, (String) theObject[0]);                 return super.execute(datas); } }
My RowMapper class MyEntity.javais:
public class MyEntity{     private String id;     private String name;     private String email;     public MyEntity(String id, String name, String email)     {         this.id = id;         this.name = name;         this.email = email;     }     public String toString(  ) {         return "Employee :"+id+", "+ name;     } public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getEmail() { return email; } public void setEmail(String email) { this. email = email; } }
Test_Example.java
import java.util.ArrayList; import java.util.List; import java.util.Map; import javax.xml.transform.TransformerException; import Example; public class Test_Example{   public static void main(String[] args){     try{     Test_Example test = new Test_Example();        test.inicioDePrueba("Tom");     }catch (Exception e){       e.printStackTrace();       System.out.println("ERRORRR: "+e);     }   }         public void inicioDePrueba(String name) throws TransformerException, Exception{   Example proc = new Example("org.jnp.interfaces.NamingContextFactory",   "jnp://xxx.xxx.xxx.xxx:xxxx",   "org.jboss.naming:org.jnp.interfaces",   "NPS_POOL_NODE");     // RUN     Object[] objects = new Object[1];     objects[0] = name;         Map resp = proc.execute(objects);           Object obj = (Object)resultado.get("result");   }  }
When I debug the code (with Eclipse), when I run the line Map resp= proc.execute(objects);, It runs OK, and the resp variable is like:
name............................value
resp................................HashMap (id=16)
....[0]...............................HashMap$Entry (id=43)
........key........................*"result"*
........value......................* $proxy3 * (id=47)
This * $Proxy3 * Object, How can I read It?
There is other way to obtain a cursor??
thanks very much.

Answer 1

jesusmgmarin wrote:
Hi, I have a java project where I try to obtain a data type from a Oracle Stored Procedure.
My problem is when I recive the Map (the Map is returned by execute method from StoredProcedure of Spring), the object I have received is a * $Proxy3 * Object and I don't know how to obtain my datas:
In the Oracle data base I have this package:
Why? Or to be more explicit - why is it coded so oddly?
There is other way to obtain a cursor??Via JDBC that requires using Oracle driver specific code.