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

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

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      int numResultSets = acb.getRowCount();
      if(numResultSets > 0)
      {
        //generate activation.raParentResultSets = new NoPutResultSet[size]
        MethodBuilder constructor = acb.getConstructor();
        constructor.pushThis();
        constructor.pushNewArray(ClassName.CursorResultSet, numResultSets);
        constructor.putField(ClassName.BaseActivation,
                   "raParentResultSets",
                   ClassName.CursorResultSet + "[]");
        constructor.endStatement();
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        // get the RowLocation template
        exprFun.getField(lf); // instance for setColumn
        exprFun.push(highestColumnNumber + 1); // first arg

        exprFun.pushThis(); // instance for getRowLocationTemplate
        exprFun.push(savedItem); // first arg
        exprFun.callMethod(VMOpcode.INVOKEINTERFACE, ClassName.Activation, "getRowLocationTemplate",
                  ClassName.RowLocation, 1);

        exprFun.upCast(ClassName.DataValueDescriptor);
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                MethodBuilder mb) throws StandardException
  {
    if (indexOfSessionTableNamesInSavedObjects != -1 ) //if this cursor references session schema tables, do following
    {
      MethodBuilder constructor = acb.getConstructor();
      constructor.pushThis();
      constructor.push(indexOfSessionTableNamesInSavedObjects);
      constructor.putField(org.apache.derby.iapi.reference.ClassName.BaseActivation, "indexOfSessionTableNamesInSavedObjects", "int");
      constructor.endStatement();
    }
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    // generates:
    //   java.lang.Object userExprFun( ) { }
    MethodBuilder userExprFun = ecb.newUserExprFun();

        /* Push the the current row onto the stack. */
        userExprFun.pushThis();
        userExprFun.push( rsNumber );
        userExprFun.callMethod(VMOpcode.INVOKEVIRTUAL, ClassName.BaseActivation, "getCurrentRow", ClassName.Row, 1);

    // Loop through the result columns, computing generated columns
        // as we go.
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    // generates:
    //   java.lang.Object userExprFun( ) { }
    MethodBuilder userExprFun = ecb.newUserExprFun();

        /* Push the the current row onto the stack. */
        userExprFun.pushThis();
        userExprFun.push( rsNumber );
        userExprFun.callMethod(VMOpcode.INVOKEVIRTUAL, ClassName.BaseActivation, "getCurrentRow", ClassName.Row, 1);

    // Loop through the result columns, computing generated columns
        // as we go.
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    //   java.lang.Object userExprFun( ) { }
    MethodBuilder userExprFun = ecb.newUserExprFun();

    /* Declare the field and load it with the current row */
    LocalField field = ecb.newFieldDeclaration(Modifier.PRIVATE, ClassName.ExecRow);
        userExprFun.pushThis();
        userExprFun.push( rsNumber );
        userExprFun.callMethod(VMOpcode.INVOKEVIRTUAL, ClassName.BaseActivation, "getCurrentRow", ClassName.Row, 1);
        userExprFun.putField( field );

    // Loop through the result columns, computing generated columns
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        // get the RowLocation template
        exprFun.getField(lf); // instance for setColumn
        exprFun.push(highestColumnNumber + 1); // first arg

        exprFun.pushThis(); // instance for getRowLocationTemplate
        exprFun.push(savedItem); // first arg
        exprFun.callMethod(VMOpcode.INVOKEINTERFACE, ClassName.Activation, "getRowLocationTemplate",
                  ClassName.RowLocation, 1);

        exprFun.upCast(ClassName.DataValueDescriptor);
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      int numResultSets = acb.getRowCount();
      if(numResultSets > 0)
      {
        //generate activation.raParentResultSets = new NoPutResultSet[size]
        MethodBuilder constructor = acb.getConstructor();
        constructor.pushThis();
        constructor.pushNewArray(ClassName.CursorResultSet, numResultSets);
        constructor.putField(ClassName.BaseActivation,
                   "raParentResultSets",
                   ClassName.CursorResultSet + "[]");
        constructor.endStatement();
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    MethodBuilder mb = cb.newMethodBuilder(Modifier.PUBLIC,
      ClassName.ResultSet, "execute");
    mb.addThrownException(ClassName.StandardException);

    // put a 'throwIfClosed("execute");' statement into the execute method.
    mb.pushThis(); // instance
    mb.push("execute");
    mb.callMethod(VMOpcode.INVOKEVIRTUAL, ClassName.BaseActivation, "throwIfClosed", "void", 1);

    // call this.startExecution(), so the parent class can know an execution
    // has begun.
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    mb.callMethod(VMOpcode.INVOKEVIRTUAL, ClassName.BaseActivation, "throwIfClosed", "void", 1);

    // call this.startExecution(), so the parent class can know an execution
    // has begun.

    mb.pushThis(); // instance
    mb.callMethod(VMOpcode.INVOKEVIRTUAL, ClassName.BaseActivation, "startExecution", "void", 0);

    return  mb;
  }
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