JavaGetObject Function

Action

Retrieves a handle on the object returned by the last call of JavaCallMethod on the specified object or class. The object retrieved may be reused for further calls of or JavaSetObject and must be released with JavaFreeObject.

Include file

Java.bdh

Syntax

JavaGetObject( in hObject : number ): number;

Return value

Returns a handle on the result of the last call of JavaCallMethod.

Parameter	Description
hObject	Valid handle to a java object or `JAVA_STATIC_METHOD`.

Example

dcltrans
  transaction TInit
  begin
    // Load and start the JVM.
    JavaCreateJavaVM();
 
  end TInit;
   
  transaction TPureBdl
  var hJTable    : number;
    hJKeyStr   : number;
    hJValueStr : number;
    hJRetVal   : number;
    sBuffer    : string;
  begin   
    // prepare the key/value pair
    // String jKeyStr = "hello";
    // String jValueStr = "world";
    hJKeyStr := JavaLoadString("hello");
    hJValueStr := JavaLoadString("world");

    // instantiate a Hashtable
    // Hashtable jTable = new Hashtable();
    hJTable := JavaLoadObject("java/util/Hashtable");

    // insert an Object into the Hashtable
    // jTable.put(jKeyStr, jValueStr);
    JavaCastObject(hJKeyStr, "java/lang/Object");
    JavaSetObject(hJTable, hJKeyStr);
    JavaSetObject(hJTable, hJValueStr, "java/lang/Object");
    JavaCallMethod(hJTable, "put");

    // retrieve an Object from the Hashtable
    // Object jRetVal = jTable.get(jKeyStr);
    JavaSetObject(hJTable, hJKeyStr);
    JavaCallMethod(hJTable, "get");
    hJRetVal := JavaGetObject(hJTable);

    // retrieve print out the java string object
    // System.out.println("Found value \""+jRetVal+"\" in Hashtable.");
    JavaCallMethod(hJRetVal, "toString");
    JavaGetString(hJRetVal, sBuffer);
    Print("Found value \""+sBuffer+"\" in Hashtable.");

    // Free all objects
    JavaFreeObject(hJTable);
    JavaFreeObject(hJKeyStr);
    JavaFreeObject(hJValueStr);
    JavaFreeObject(hJRetVal);
  end TPureBdl;

  transaction TEnd
  begin
  end TEnd;

Sample scripts

JavaFrameworkBankSample.bdf

BankSample.java, Account.java, Customer.java, PremiumCustomer.java