Resolving type names during compilation

Hi,
I have a question about how the default (or any other) java compiler resolves type names when compiling several files. How does the compiler efficiently organise itself so that it can resolve type names that it has not yet parsed?
take a trivial example:
//file a.java
class a{b myB;}
//file b.java
class b{}
if it compiles file a.java first then it must search for class b in some way to check that it exists. how?
If you are wondering why I ask this, it is becuase I am using antlr(www.antlr.org) to reverse engineer java into UML.
tia + cheers,
Alex

see
http://forum.java.sun.com/thread.jsp?forum=7&thread=31728
Thanks for the feedback, but it does not answer my question of how the insides of the java compiler works. I assume that it can compile and the classpath is set up correctly...
Try a less trivial example: you compile a large open source project like netbeans. When the compiler arrives at a declaration involving a type that it has not come across. how does it know that it is a valid type? I am talking about how the compiler is implemented. This is a question about compiler design.
does the compiler first work out class dependencies and compile in a certain order?
or does it make a symbol table of all type first, then check that when compiling?
maybe this forum is more about how to compile rather than how compilers work?

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for some good reasons (don't ask ...) I need to implement a solution where a directory listing, on the DB server machine, can be gotten via an sql query.
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Environment: 11gR2 on Win7, SQLDeveloper as front-end.
In order to do this, I created a simple Java class, DB types and PL/SQL wrappers as follows:
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CREATE OR REPLACE AND COMPILE java source named FSEntryReturn
as
import java.sql.*;
import java.util.*;
import java.io.File;
import oracle.jdbc.*;
import oracle.sql.*;
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    private NUMBER last_modified;
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                        , long entry_size
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        this.entry_name = new CHAR( entry_name, oracle.sql.CharacterSet.make( conn.getStructAttrCsId() ) );
        this.entry_size = new NUMBER( entry_size );
        this.last_modified = new NUMBER( last_modified );
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        this.entry_size = entry_size;
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          File f = new File( dir, fileName );
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create or replace PACKAGE QAO_SUPPORT
AS
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AS
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RETURN t_fs_entry_tab
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NAME 'FSEntryReturn.getDirList( java.lang.String ) return oracle.sql.ARRAY';
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COMMIT;
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I get the following error (sorry for the dutch stuff, basically, "uncaught java exception: error in creation of descriptor:..."):
ORA-29532: Java-aanroep is afgesloten door niet-onderschepte Java-uitzondering: java.sql.SQLException: Maken van descriptor is mislukt.: Unable to resolve type: "FPL_XSD.T_FS_ENTRY".
ORA-06512: in "FPL_XSD.QAO_SUPPORT", regel 30
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ARRAY oracleCollection = conn.createARRAY( "T_FS_ENTRY", retArray );
Note that when logged in as FPL_XSD, desc T_FS_ENTRY returns the type description.
I searched everywhere and consulted the documentation. I think it should work. I am out of ideas, but I have a suspect the problem might be with the connection configuration, maybe?
Any help or hint is greatly appreciated.
Kindly,
Andrea

Hi All,
I insisted trying and I found out what the problem was. In:
ARRAY oracleCollection = conn.createARRAY( "T_FS_ENTRY", retArray );
The first argument is an Oracle type name, I wrongly used the RECORD (OBJECT) type name - T_FS_ENTRY -, not the name of the nested table T_FS_ENTRY_TAB.
So the code should look like:
ARRAY oracleCollection = conn.createARRAY( "T_FS_ENTRY_TAB", retArray );
Which works.
//Andrea

ValidationException: Duplicate type name

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07/04/19 09:53:03      at oracle.j2ee.ws.common.processor.config.ModelInfo.buildModel(ModelInfo.java:173)
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07/04/19 09:53:03      at oracle.j2ee.ws.common.metadata.annotation.DeploymentGenerator.generateDeploymentArtifacts(DeploymentGenerator.java:131)
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07/04/19 09:53:03      at com.evermind.server.ApplicationStateRunning.initializeApplication(ApplicationStateRunning.java:217)
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07/04/19 09:53:03      at java.lang.Thread.run(Thread.java:595)
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package gov.mi.mdch.mcirhl7.ejb.service;
@WebService
public interface CodeDataServiceWebService extends Remote {
List<ServiceType> queryServiceTypeFindAll()
throws RemoteException;
List<Version> queryVersionFindAll()
throws RemoteException;
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I've been searching for a solution to this problem for most of the week to no avail. Any thoughts? Thanks.
Joel
Subject was edited by: user570454

Joel,
You may have some encounter some backward incompatibility between the code generated for 10.1.3.2, when you run the application in the embedded container and when you deploy on a remote instance using 10.1.3.1.
It may be worth trying to re-assemble the application using JDev 10.1.3.1 or use the command line (or ant integration) of WSA to build the application that you target at the 10.1.3.1 instance using the same version of the tooling.
Chapter 18 of the user guide provide details about ant commands.
http://download.oracle.com/docs/cd/B32110_01/web.1013/b28974/wsassemble.htm#CHDDBCCA
You may also want to report this using the metalink/support channel, so that the potential bugs behind this can be addressed for you.
-Eric

PLS-00330: invalid use of type name or subtype name

I am relatively new to Sql and am in the process of learning, so please bear with me. I am trying to create a trigger for the Invoices table that displays the vendor_name, invoice_number, and payment_total after the payment_total has been increased. I have discovered that I must use a compound trigger due to a mutating-table error and ended up with this:
CREATE OR REPLACE TRIGGER invoices_after_update_payment
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ON invoices
COMPOUND TRIGGER
TYPE invoice_numbers_table      IS TABLE OF VARCHAR2(50);
TYPE payment_totals_table       IS TABLE OF NUMBER;
TYPE vendor_names_table         IS TABLE OF VARCHAR2(50);
TYPE summary_payments_table     IS TABLE OF NUMBER INDEX BY VARCHAR2(50);
TYPE summary_names_table        IS TABLE OF NUMBER INDEX BY VARCHAR2(50);
invoice_numbers                 invoice_numbers_table;
payment_totals                  payment_totals_table;
vendor_names                    vendor_names_table;
payment_summarys                summary_payments_table;
name_summarys                   summary_names_table;
AFTER STATEMENT IS
    invoice_number VARCHAR2(50);
    payment_total NUMBER;
    vendor_name VARCHAR2(50);
BEGIN
    SELECT i.invoice_number, i.payment_total, v.vendor_name
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    FROM invoices i JOIN vendors v
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      vendor_name := vendor_names(i);
      summary_payments_table(invoice_number) := payment_total;
      summary_names_table(invoice_number) := vendor_name;
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END AFTER STATEMENT;
AFTER EACH ROW IS
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    vendor_name VARCHAR2(50);
BEGIN
    temp_payment_total := payment_summarys(:new.invoice_number);
    vendor_name := name_summarys(:new.invoice_number);
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END AFTER EACH ROW;
END;
/The code that I am using to update the table is:
UPDATE invoices
SET payment_total = 508
WHERE invoice_number = 'QP58872'At this point, I am getting an error report saying:
29/7           PLS-00330: invalid use of type name or subtype name
29/7           PL/SQL: Statement ignored
30/7           PLS-00330: invalid use of type name or subtype name
30/7           PL/SQL: Statement ignoredWhat does the error code entail? I have looked it up but can't seem to pin it. Any help would be greatly appreciated and I am open to any suggestions for improving my current code.
I am using Oracle Database 11g Express Edition on Windows 7. I am not sure if it is relevant, but I am also using Sql Developer. If you need any further information, I will do my best to provide what I can.
Thanks!
Edited by: 927811 on Apr 15, 2012 11:54 PM
Edited by: 927811 on Apr 15, 2012 11:56 PM

I took your advice and removed the exception handling. There is no point in it being there. I also checked the timing points and you are correct. So, I changed my AFTER STATEMENT to BEFORE STATEMENT, which I had been thinking about doing anyways. It just seemed logical to me. That brings me to where I am now. I ran my update again and got back this error, It is the same as the one before, but for a different line (?)
Error starting at line 1 in command:
UPDATE invoices
SET payment_total = 510
WHERE invoice_number = 'QP58872'
Error report:
SQL Error: ORA-06502: PL/SQL: numeric or value error: character to number conversion error
ORA-06512: at "AP.INVOICES_AFTER_UPDATE_PAYMENT", line 30
ORA-04088: error during execution of trigger 'AP.INVOICES_AFTER_UPDATE_PAYMENT'
06502. 00000 - "PL/SQL: numeric or value error%s"
*Cause:
*Action:Also, to make sure you are clear as to what my code now looks like:
SET SERVEROUTPUT ON;
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FOR UPDATE OF payment_total
ON invoices
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TYPE invoice_numbers_table      IS TABLE OF VARCHAR2(50);
TYPE payment_totals_table       IS TABLE OF NUMBER;
TYPE vendor_names_table         IS TABLE OF VARCHAR2(50);
TYPE summary_payments_table     IS TABLE OF NUMBER INDEX BY VARCHAR2(50);
TYPE summary_names_table        IS TABLE OF NUMBER INDEX BY VARCHAR2(50);
invoice_numbers                 invoice_numbers_table;
payment_totals                  payment_totals_table;
vendor_names                    vendor_names_table;
payment_summarys                summary_payments_table;
name_summarys                   summary_names_table;
BEFORE STATEMENT IS
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    payment_total NUMBER;
    vendor_name VARCHAR2(50);
BEGIN
    SELECT i.invoice_number, i.payment_total, v.vendor_name
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END BEFORE STATEMENT;
AFTER EACH ROW IS
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BEGIN
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    END IF;
END AFTER EACH ROW;
END;
/Thanks for the help!

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Hi ...
Apologies ... for confusion ... actually both are required ...
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The below code worked for me ...
check out how I cast it to the parent class type ...
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Cheers
Edited by: Varun Verma on Aug 12, 2008 4:19 PM

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// Create the StructDescriptor from the connection
StructDescriptor prStructDesc =
StructDescriptor.createDescriptor("X.NAME", conn);
// construct the object array containing the attribute values for the
// X.NAME object to be inserted
Object[] xObjArray =
"val1",
"val2",
// Construct the Struct from the StructDescriptor and xObjStruct
oracle.sql.STRUCT xStruct = new STRUCT(prStructDesc,
conn, xObjArray);
cs = conn.prepareCall("{ call X.PROC(?,?,?)}");
cs.setObject(1, xStruct);
When I run the code within JDeveloper it runs without any errors. When I deploy to 9iAS release 2 and try to run it there, I receive the error. Thanks for any help.

Think I found a solution,.. or at least stopped getting the error. I'm using oracle's OracleCallableStatement instead of the java.sql.CallableStatement. I'm also using a different app server. same version 9.0.2.0.0 I'd recommend applying the patches to anyone using this version. I've ran into some errors that have been patched. It's a long process though..
cheers.

URGENT :: ORA-12154: TNS:could not resolve service name

Hi All,
I am connecting to the db using oracle thin driver in java. I am invoking a SOAP call and after getting the response, i am inserting the response(gen. a pdf file) into my DB. I am using a static connection. I have to insert 130 pdf's in DB. After processing 120 pdf's, the following error has occurred,
ERROR DBUtil - ORA-12154: TNS:could not resolve service name
java.lang.NullPointerException
     at com.elsevier.cds.ew.DBUtil.insertPDF(Compiled Code)
     at com.elsevier.cds.ew.GenerateSoapRequest.generateSOAPCall(Compiled Code)
     at com.elsevier.cds.ew.EOffprintLoad.processPDFFiles1(Compiled Code)
     at com.elsevier.cds.ew.EOffprintLoad.init1(Compiled Code)
     at com.elsevier.cds.ew.EOffprintLoad.<init>(EOffprintLoad.java:138)
     at com.elsevier.cds.ew.EOffprintLoad.main(EOffprintLoad.java:987)
ERROR GenerateSoapRequest -
ERROR DBUtil - ORA-12154: TNS:could not resolve service name.
The checked the oracle listener status. It was UP.
Can anyone help me in this issue.
Thanks,
Rag

Hello,
Make sure that the service which you have specified in jdbc for making connection with oracle, exists in TNSNAMES.ORA file. You will find this file at different locations in 8i and above. So, better search for it. And add you service name in it. Example services is given in this file itself. So, take help from them.

Unable to resolve scan name to an ip address

Hi All,
I am installing 11gR2 on RHEL-4.
My installing is getting on scan ip part.
Its giving me an error that unable to resolve scan name to an ip address.
I have put the scan ip entry in /ect/hosts file instead configuring using DNS.
My /etc/hosts
vi /ect/hosts
127.0.0.1 localhost.localdomain localhost
#public
192.168.2.201 rac1.oracle.com rac1
192.168.2.202 rac2.oracle.com rac2
#private
10.10.1.1 rac1-priv.oracle.com rac1-priv
10.10.1.2 rac2-priv.oracle.com rac2-priv
#virtual
192.168.2.211 rac1-vip.oracle.com rac1-vip
192.168.2.212 rac2-vip.oracle.com rac2-vip
192.168.2.301 rac-scan.oracle.com rac-scan
The same entry is for second node
The installation should run anyways i am putting scan ip entry in /etc/hosts file
Could you please let me know where i am going worng?
Your assistance is much appreciated in this regards.
Thanks and Regards,

Hi
Thanks for the help.
I have installed 11gr2 on centos 4.5.
During installation i configured 3 disk and selected normal redundancy.
Please find the output of ocrcheck and asm disk.
[grid@rac1 bin]$ ./ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 3
Total space (kbytes) : 262120
Used space (kbytes) : 2220
Available space (kbytes) : 259900
ID : 1931872859
Device/File Name : +ocr_vote
Device/File integrity check succeeded
Device/File not configured
Device/File not configured
Device/File not configured
Device/File not configured
Cluster registry integrity check succeeded
Logical corruption check bypassed due to non-privileged user
[grid@rac1 bin]$ /etc/init.d/oracleasm listdisks
OCRVOTE1
OCRVOTE2
OCRVOTE3
I should able to see 3 disks for ocrcheck, While installing i selected normal redundancy and selected all the 3 disks.
Could you please explain this.
your assistance is much appreciated .
Thanks and Regards,

Deploy cannot resolve service name

Hi
I have a very simple warehouse project in OWB 9.2. I have defined an ODBC source on SQL Server and wish to deploy to a target table defined in an Oracle target module. A mapping, locations, connectors, database links etc are defined and valid.
Up to the "Pre deployment generation results" view, all operations are shown as success. However, on selecting "Deploy" from this window, the deploy status is "Failed" with error "ORA-12514: TNS:could not resolve service name".
I have checked the TNSNAMES.ORA file and all service names used are defined. Using "tnsping", I can connect to the oracle database, however the connection to the SQL Server database using "myhsodbc" fails. I can successfully connect to the SQL Server database using the database link defined when creating the source module or from SQL*Plus.
Any suggestions as to which service name is unresolved?
Thanks
Bob

Hi Mark
I have added tnsnames file to server and client, oracle_home and owb_home with no change in result. The following info is little lengthy, but I hope it may give a clue to resolve my situation.
The deployment manager identifies 3 objects for deployment - a mapping (SAP_CI_HIERARCHY), a table (SAP_CI_HIERARCHY) and a connector (ORAONSQL_SQLONPCRH).
The generated connector script follows:
CREATE DATABASE LINK "{{SQLONPCRH.Service}}"@ORAONSQL_SQLONPCRH
CONNECT TO "{{SQLONPCRH.ConnectAs}}"
IDENTIFIED BY "{{SQLONPCRH.Password}}"
USING '(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)
(HOST={{SQLONPCRH.Host}})(PORT={{SQLONPCRH.Port}})))
(CONNECT_DATA=(SERVICE_NAME={{SQLONPCRH.Service}}))
(HS=OK)
The mapping script contains the following connection string in a select statement:
FROM "dbo"."SAP_CI_HIERARCHY"@"MYHSODBC.FIRM.UNI.EDU"@"ORAONSQL_SQLONPCRH" "SAP_CI_HIERARCHY_ORA10323"
The SQL Server source is defined by the following connection information:
Database Link: PCRH_LINK.FIRM.UNI.EDU
Connect String: myhsodbc.firm.uni.edu
Gateway Type: Oracle Generic Connectivity - HSODBC
Schema: dbo
Location: SQLONPCRH
The Oracle target is defined as follows:
Database Link: ORAONSQL_LINK.FIRM.UNI.EDU
Connect String: oraonsql.firm.uni.edu
Schema: firmolap
Location: ORAONSQL
TNSNAMES.ORA file contains entry for oraonsql & myhsodbc:
ORAONSQL.FIRM.UNI.EDU =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = sqlserver)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = oraonsql.firm.uni.edu)
MYHSODBC.FIRM.UNI.EDU =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = sqlserver)(PORT = 1521))
(CONNECT_DATA =
(SID = myhsodbc)
(HS = OK)
From SQL*PLUS,
SELECT *
FROM "dbo"."SAP_CI_HIERARCHY"@"PCRH_LINK.FIRM.UNI.EDU"; returns data, whereas the SELECT statement from the generated script returns ERROR "ORA-02019: connection description for remote database not found".
All database links are PUBLIC.
Location registration:
ORAONSQL
Service name: ORAONSQL.FIRM.UNI.EDU
Net service name: ORAONSQL
SQLONPCRH
Service name: myhsodbc.firm.uni.edu
Net service name: myhsodbc
Is there something in this that points to the problem either in connecting from Deployment Manager (or from SQL*PLUS)?
Thanks again for any help you can offer.
Bob

CAN'T Update Server name during login (since I have changed computer name)

I had a working environment of SAP BO 8.8 installation (VM), I made a second copy for a someone who needs to change his server name so we don't collide with each other. So he changed his server name fine and now when we try to change the name during login in SAP BO, we are completely unable to do anything, no company or database shows up and when you try typing server name it won't allow you since it is a drop down, the only availble server name is the old server name.
We went to Service Manager, got a new license key for the hardware key, update fine as well as updating the server name there but when we try login, we are not able and no matter what we do we are not able to change the server name. Please help, it is getting desperate (tried all things possible).
Thanks

In working VM copy, do a global search for the server name in all configuration files in SAP install directory. Then compare with copied copy and try to change appropriate names in all files.
Changing server name is a complex process, it has many references in many configuration files that you may have to touch.
This will be an uphill battle. Goodluck.
Lots of other things you can do, ping by hotname, check hostfile in case vm is also using it, there are two types of vm installs network or self contained (something like that) - so hostname may be getting masked by vm network environment, definitely SAP has few configuration files where the Server name, db name, license server name, port etc are present, even check for firewall settings etc.

Resolving type names during compilation

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