Examples of org.apache.derby.iapi.services.compiler.MethodBuilder.methodReturn()

Package org.apache.derby.iapi.services.compiler

Class org.apache.derby.iapi.services.compiler.MethodBuilder

Examples of org.apache.derby.iapi.services.compiler.MethodBuilder.methodReturn()

org.apache.derby.iapi.services.compiler.MethodBuilder.methodReturn()
Return from a method, optionally with a value. Must only be called if zero or one item exists on the stack. If the stack contains a single value then that is popped and used as the returned value.
```
 Stack value => :empty: or Stack :empty: => :empty: 
```
.

       * since the restriction may simply be a boolean column or subquery
       * which returns a boolean.  For example:
       *    where booleanColumn
       */
      restriction.generate(acb, userExprFun);
      userExprFun.methodReturn();


      // we are done modifying userExprFun, complete it.
      userExprFun.complete();


         // restriction is used in the final result set as an access of the new static

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       * since the restriction may simply be a boolean column or subquery
       * which returns a boolean.  For example:
       *    where booleanColumn
       */
      restriction.generateExpression(acb, userExprFun);
      userExprFun.methodReturn();


      // we are done modifying userExprFun, complete it.
      userExprFun.complete();


         // restriction is used in the final result set as an access of the new static

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       * which returns a boolean.  For example:
       *    where booleanColumn
       */
      constantRestriction.generateExpression(acb, userExprFun);


      userExprFun.methodReturn();


      // we are done modifying userExprFun, complete it.
      userExprFun.complete();


         // restriction is used in the final result set as an access

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       * which returns a boolean.  For example:
       *    where booleanColumn
       */


      searchClause.generateExpression(acb, userExprFun);
      userExprFun.methodReturn();




      /* PUSHCOMPILER
      userSB.newReturnStatement(searchClause.generateExpression(acb, userSB));
      */

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      /* generates:
       *    return <joinClause.generate(acb)>;
       * and adds it to userExprFun
       */
      joinClause.generate(acb, userExprFun);
      userExprFun.methodReturn();


      // we are done modifying userExprFun, complete it.
      userExprFun.complete();


         // join clause is used in the final result set as an access of the new static

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    // CursorActivation - CursorResultSet getTargetResultSet()
    MethodBuilder getter = cb.newMethodBuilder(Modifier.PUBLIC, 
      ClassName.CursorResultSet, "getTargetResultSet");


    getter.getField(targetResultSetField);
    getter.methodReturn();
    getter.complete();


    // This method is an implementation of the interface method
    // CursorActivation - CursorResultSet getCursorResultSet()

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    getter = cb.newMethodBuilder(Modifier.PUBLIC, 
      ClassName.CursorResultSet, "getCursorResultSet");


    getter.getField(cursorResultSetField);
    getter.methodReturn();
    getter.complete();
  }


  /**
   * Updatable cursors

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        if ( _matchingRefinement != null )
        {
            MethodBuilder userExprFun = acb.newUserExprFun();


            _matchingRefinement.generateExpression( acb, userExprFun );
            userExprFun.methodReturn();
    
            // we are done modifying userExprFun, complete it.
            userExprFun.complete();


            refinementName = userExprFun.getName();

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        remapConstraints();


        // now generate the action into this method
        _dml.generate( acb, mb );
        
        mb.methodReturn();
        mb.complete();
    }


    /**
     * <p>

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    MethodBuilder qualMethod = acb.newUserExprFun();


    /* Generate a method that returns that expression */
    acb.generateNull(qualMethod, operand.getTypeCompiler(),
        operand.getTypeServices().getCollationType());
    qualMethod.methodReturn();
    qualMethod.complete();


    /* Return an expression that evaluates to the GeneratedMethod */
    acb.pushMethodReference(mb, qualMethod);
  }

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