Build object where the constructor is a string

Question

Is there a way (except using eval()) to build a sapui5 control if the constructor is a string?

For example, I want to build a text control:

var oText = new sap.m.Text({});

but the part "new sap.m.Text({})" is actually a string. I tried eval():

var sObj = "new sap.m.Text({});";
var oObj = eval(sObj);
oObj.setText("Hello");

and it works.

The question is if there is another, more secure way to do it.

@dfsq could you please explain how `new Function` differs from `eval()`? — keshet, Aug 23 '15 at 08:42
Check this: http://stackoverflow.com/questions/4599857/are-eval-and-new-function-the-same-thing — dfsq, Aug 23 '15 at 09:06

score 2 · Accepted Answer · answered Aug 24 '15 at 07:57

2

Based on @dfsq's comment you can use new Function:

var fControlGenerator = function (sControlCommand) {
    return new Function("return " + sControlCommand)();
};
var oControl = fControlGenerator("new sap.m.Text()");

answered Aug 24 '15 at 07:57

hirse

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You had posted your answer while I was typing mine, which is almost the same as yours. You just saved me some time, good sir! – keshet Aug 24 '15 at 08:02

Build object where the constructor is a string

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