Pass java HASHMAP to oralce procedure

Hi,
I have Java HashMap(<key, value). Can i pass it to oracle procedure?
I am using java 1.4 and oracle 10g.
any help

Hi,
Some information, From the point of the view that the need is to pass an object from java to PLSQL or vice versa (Not HashMap, but data which can be manipulated in PLSQL)
What you need to do/investigate is ..
1. Load your java files to database (using loadjava integrated in JDev better, else seperately)
2. Create PLSQL procedure for the java method using JDev)
3. Define PLSQL object which you want to use as counter part of the java object. (Its reverse, first create plsql object)
4. In jdeveloper connection navigator,use generte java to generate corresponding java object class.
The above information is to fascilitate information exchange between java and PLSQL in terms of Objects. Based on one of projects I had done.
If abouvGive a little try and probably you may be able to do reverse (first define Java OBject (you have HashMap here) and then the PLSQL Object.)
Most of the things are automated in JDeveloper. Just explore it.
Abdul Wahid

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Oracle9 i JDBC Developers Guide and Reference(page 21-16):
It is not feasible for Oracle JDBC drivers to support calling arguments or return
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However, Oracle JDBC drivers support PL/SQL index-by table of scalar element
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We're going to write a new web interface for a big system based on Oracle database. All business rules are already coded in PL/SQL stored procedures and we'd like to reuse as much code as possible. We'll write some new stored procedures that will combine the existing business rules and return the final result dataset.
We want to do this on the database level to avoid java-db round trips. The interface layer will be written in Java (we'd like to use GWT), so we need a way of passing data from Oracle stored procedures to Java service side. The data can be e.g. a set of properties of a specific item or a list of items fulfilling certain criteria. Would anyone recommend a preferable way of doing this?
We're considering one of the 2 following scenarios:
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passing a sys_refcursor
We verified that both approaches are "doable", the question is more about design decision, best practice, possible maintenance problems, flexibility, etc.
I'd appreciate any hints.

user1754151 wrote:
We're going to write a new web interface for a big system based on Oracle database. All business rules are already coded in PL/SQL stored procedures and we'd like to reuse as much code as possible. We'll write some new stored procedures that will combine the existing business rules and return the final result dataset.
We want to do this on the database level to avoid java-db round trips. The interface layer will be written in Java (we'd like to use GWT), so we need a way of passing data from Oracle stored procedures to Java service side. The data can be e.g. a set of properties of a specific item or a list of items fulfilling certain criteria. Would anyone recommend a preferable way of doing this?
We're considering one of the 2 following scenarios:
passing objects and lists of objects (DB object types defined on the schema level)
passing a sys_refcursor
We verified that both approaches are "doable", the question is more about design decision, best practice, possible maintenance problems, flexibility, etc.
I'd appreciate any hints.If logic is already written in DB, and the only concern is of passing the result to java service side, and also from point of maintenance problem and flexibility i would suggest to use the sys_refcursor.
The reason if Down the line any thing changes then you only need to change the arguments of sys_refcursor in DB and as well as java side, and it is much easier and less efforts compare to using and changes required for Types and Objects on DB and java side.
The design and best practise keeps changing based on our requirement and exisiting design. But by looking at your current senario and design, i personally suggest to go with sys_refcursor.

Passing an array as parameter from java (java controls) to stored procedure

Hi,
I'm using java controls (BEA Weblogic Workshop 8.1) to call a stored procedure and send an array as a parameter to the stored procedure from java. The following code below throws an exception "Fail to convert to internal representation".
Java code
import com.bea.control.DatabaseControl.SQLParameter;
// Here i create the java array
int[] javaArray={12,13,14};
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at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:125)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:162)
at oracle.jdbc.driver.DatabaseError.check_error(DatabaseError.java:861)
at oracle.sql.ARRAY.toARRAY(ARRAY.java:210)
at oracle.jdbc.driver.OraclePreparedStatement.setObjectCritical(OraclePreparedStatement.java:7768)
at oracle.jdbc.driver.OraclePreparedStatement.setObjectInternal(OraclePreparedStatement.java:7449)
at oracle.jdbc.driver.OraclePreparedStatement.setObjectInternal(OraclePreparedStatement.java:7837)
at oracle.jdbc.driver.OracleCallableStatement.setObject(OracleCallableStatement.java:4587)
at weblogic.jdbc.wrapper.PreparedStatement.setObject(PreparedStatement.java:244)
at com.bea.wlw.runtime.core.control.DatabaseControlImpl._setParameter(DatabaseControlImpl.jcs:1886)
at com.bea.wlw.runtime.core.control.DatabaseControlImpl.getStatement_v2(DatabaseControlImpl.jcs:1732)
at com.bea.wlw.runtime.core.control.DatabaseControlImpl.invoke(DatabaseControlImpl.jcs:2591)
at com.bea.wlw.runtime.core.dispatcher.DispMethod.invoke(DispMethod.java:377)
at com.bea.wlw.runtime.core.container.Invocable.invoke(Invocable.java:433)
at com.bea.wlw.runtime.core.container.Invocable.invoke(Invocable.java:406)
at com.bea.wlw.runtime.core.container.Invocable.invoke(Invocable.java:249)
at com.bea.wlw.runtime.jcs.container.JcsContainer.invoke(JcsContainer.java:85)
at com.bea.wlw.runtime.core.bean.BaseContainerBean.invokeBase(BaseContainerBean.java:224)
at com.bea.wlw.runtime.core.bean.SLSBContainerBean.invoke(SLSBContainerBean.java:109)
at com.bea.wlwgen.StatelessContainer_ly05hg_ELOImpl.invoke(StatelessContainer_ly05hg_ELOImpl.java:153)
Can you please let me know, what i'm doing wrong and how i can pass an array to a procedure/function using java controls.
Any help will be highly appreciated.
Edited by: user12671762 on Feb 24, 2010 5:03 AM
Edited by: user9211663 on Feb 24, 2010 9:04 PM

Thanks Michael.
Here's the final code that i used, this might be helpful for those who face this problem
Java Code
// Following code gets the connection object
InitialContext ctx = new InitialContext();
dataSource = (DataSource)ctx.lookup("<DataSourceName>");
conn=dataSource.getConnection();
// Following code is used to create the array type from java
String query="CREATE OR REPLACE TYPE STR_ARRAY AS VARRAY(3) OF NUMBER";
dbControl.runTypeQuery(query);
// Following code is used to obtain the oracle sql array as SQLParameter
ArrayDescriptor desc = ArrayDescriptor.createDescriptor("<schemaName>.STR_ARRAY", conn);
Object[] elements = new Object[3];
elements[0] = new Integer(12);
elements[1] = new Integer(13);
elements[2] = new Integer(14);
oracle.sql.ARRAY newArray = new oracle.sql.ARRAY( desc, conn, elements);
SQLParameter[] params = new SQLParameter[1];
params[0] = new SQLParameter(newArray, oracle.jdbc.OracleTypes.ARRAY, SQLParameter.IN);
String succ= dbControl.testFunc(params);

How can i pass the parameter for strored procedure from java

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Hi All,
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Kiran Kumar Gunda wrote:
I would want to use Oracle provided (Oracle Extensions) API to pass arrays to PL/SQL
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>
I want your opinion in this, so that I will be confident in using this feature
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3
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Pass java HASHMAP to oralce procedure

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