nested.txt

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Subject: [dwr-user] Re: nested properties read/write

Hi,
I did something for mapped properties.
The code had catalan variable names. I translated  it a bit  to english. 
Hope it's understandable.

I have a function that builds up a javascript object with all the 
elements in the page:

function buildObject()
{
  var obj;
  var controls;
  var i;
  obj = new Object();
 
  controls = document.getElementsByTagName("INPUT");
  for (i=0;i<controls.length;i++)
  {
    if ((controls[i].name!=null) && (controls[i].name!=""))
    {
      obj[controls[i].name] = 
(controls[i].type.toLowerCase()!="checkbox") ? controls[i].value : 
controls[i].checked;
    }
  }
  controls = document.getElementsByTagName("SELECT");
  for (i=0;i<controls.length;i++)
  {
    if ((controls[i].name!=null) && (controls[i].name!=""))
    {
      obj[controls[i].name] = controls[i].value;
    }
  }
  controls = document.getElementsByTagName("TEXTAREA");
  for (i=0;i<controls.length;i++)
  {
    if ((controls[i].name!=null) && (controls[i].name!=""))
    {
      obj[controls[i].name] = controls[i].value;
    }
  }
  return(obj);
}


To set a property:

function setPropety(obj, propName, value)
{
    var nom1,nom2;
  if (propName)
  {
    if (propName.indexOf("(")>=0)
    {
      nom1 = propName.substring(0,propName.indexOf("("));
      nom2 =  
propName.substring(propName.indexOf("(")+1,propName.indexOf(")"))+propNamesubstring(propName.indexOf(")")+1);
      this.setPropietat(obj[nom1],
                        nom2,
                        value);
    }
    else
    {
      obj[propName] = value;
    }
  }
}

To get it:

function getProperty(obj, propName)
{
  var valor;
  var nom1;
  var nom2;
  valor = null;
  if (propName)
  {
    if (propName.indexOf("(")>=0)
    {
      nom1 = propName.substring(0,propName.indexOf("("));
      nom2 =  
propName.substring(propName.indexOf("(")+1,propName.indexOf(")"))+propName.substring(propName.indexOf(")")+1);
      //Let's get sure that the property exists
      if (!obj[nom1])
      {
        obj[nom1] = new Object();
      }
      valor = this.getProperty(obj[nom1],
                                nom2);
    }
    else
    {
      //Let's get sure that the property exists
      if (!obj[propName])
      {
        obj[propName] = null;
      }
      valor = obj[propName];
    }
  }
  return(valor);
}


in the html you should have:

<input type="text" id="bar(bar1)" >

like the struts way for map backed properties.

then, in javascript:
    obj = buildObject();
    setProperty(obj,"bar(bar1)",value_you_want);
    alert(getProperty(obj,"bar(bar1)"));

I think it would be nice to extend the functionality to vector mapped 
properties and subproperties and adding it to the standard dwr, isn't 
it, Joe?
;-)


>
> ------------------------------------------------------------------------
>
> Assumpte:
> nested properties read/write
> De:
> Lovkiy Slava <[e-mail]>
> Data:
> Mon, 20 Mar 2006 07:41:27 -0800 (PST)
> Per a:
> [e-mail]
>
> Per a:
> [e-mail]
>
>
> Hi,
>
> Did anyone come up with good algorithm how we can use
> DWRUtil.getValues()/setValues() to work with nested
> properties on page? 
>
> Say, we have an object: 
> ----------------------
> var someObject = {
>  foo : 10;
>  bar : { 
>           bar1 : "some value";
>           bar2 : 123;
>               }
> }
> ----------------------
>
>
> and fields on form like:
> ------------------------------
>  <input type="text" id="foo">
>  <input type="text" id="bar.bar1">
>  <input type="text" id="bar.bar2">
> ----------------------------------
>
> I call DWRUtils.setValues(someObject) and it should
> automaticly populate all those nested properties
> "bar.bar1" and "bar.bar2"
>
> Any Ideas? 
>
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