Publishing the Java Classes

Next, you must publish your Java stored procedures in the Oracle data dictionary. To do that, you write call specs, which map Java method names, parameter types, and return types to their SQL counterparts.

The methods in the Java class POManager are logically related, so you group their call specs in a PL/SQL package. First, you create the package spec, as follows:

CREATE OR REPLACE PACKAGE po_mgr AS
  PROCEDURE add_customer (cust_no NUMBER, cust_name VARCHAR2,
    street VARCHAR2, city VARCHAR2, state CHAR, zip_code VARCHAR2,
    phone_no VARCHAR2);
  PROCEDURE add_stock_item (stock_no NUMBER, description VARCHAR2,
    price NUMBER);
  PROCEDURE enter_order (order_no NUMBER, cust_no NUMBER,
    order_date VARCHAR2, ship_date VARCHAR2, to_street VARCHAR2,
    to_city VARCHAR2, to_state CHAR, to_zip_code VARCHAR2);
  PROCEDURE add_line_item (line_no NUMBER, order_no NUMBER,
    stock_no NUMBER, quantity NUMBER, discount NUMBER);
  PROCEDURE total_orders;
  PROCEDURE check_stock_item (stock_no NUMBER);
  PROCEDURE change_quantity (new_qty NUMBER, order_no NUMBER,
    stock_no NUMBER);
  PROCEDURE delete_order (order_no NUMBER);
END po_mgr;

Then, you create the package body by writing call specs for the Java methods:

CREATE OR REPLACE PACKAGE BODY po_mgr AS
  PROCEDURE add_customer (cust_no NUMBER, cust_name VARCHAR2,
    street VARCHAR2, city VARCHAR2, state CHAR, zip_code VARCHAR2,
    phone_no VARCHAR2) AS LANGUAGE JAVA
  NAME 'POManager.addCustomer(int, java.lang.String,
    java.lang.String, java.lang.String, java.lang.String,
    java.lang.String, java.lang.String)';

  PROCEDURE add_stock_item (stock_no NUMBER, description VARCHAR2,
    price NUMBER) AS LANGUAGE JAVA
  NAME 'POManager.addStockItem(int, java.lang.String, float)';

  PROCEDURE enter_order (order_no NUMBER, cust_no NUMBER,
    order_date VARCHAR2, ship_date VARCHAR2, to_street VARCHAR2,
    to_city VARCHAR2, to_state CHAR, to_zip_code VARCHAR2)
  AS LANGUAGE JAVA
  NAME 'POManager.enterOrder(int, int, java.lang.String,
    java.lang.String, java.lang.String, java.lang.String,
    java.lang.String, java.lang.String)';

  PROCEDURE add_line_item (line_no NUMBER, order_no NUMBER,
    stock_no NUMBER, quantity NUMBER, discount NUMBER)
  AS LANGUAGE JAVA
  NAME 'POManager.addLineItem(int, int, int, int, float)';

  PROCEDURE total_orders
  AS LANGUAGE JAVA
  NAME 'POManager.totalOrders()';

  PROCEDURE check_stock_item (stock_no NUMBER)
  AS LANGUAGE JAVA
  NAME 'POManager.checkStockItem(int)';

  PROCEDURE change_quantity (new_qty NUMBER, order_no NUMBER,
    stock_no NUMBER) AS LANGUAGE JAVA
  NAME 'POManager.changeQuantity(int, int, int)';

  PROCEDURE delete_order (order_no NUMBER)
  AS LANGUAGE JAVA
  NAME 'POManager.deleteOrder(int)';
END po_mgr;

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