How people do 'setAttribute' in the decode of JSF custom comp render class

Question

Imagine the next scenario:
I have a custom JSF table with one attribute called ‘data’ (of type String[][]) with serves in the encode() method of the table to produce the html table markup.
encodeBegin(...)  {
String[][] data  = (String[][])table.getAttributes().get("data");
......all right.
Then, I have another attribute, called ‘selectedData’ (of type ArrayList), intended to store the id’s of the selected rows.
In the decode method I receive the selected rows id’s, but I’m not able to write them in the ‘selectedData’ attribute, because it doesn’t exist a table 'setAttribute' method.
What I’m doing wrong?

Answer 1

>
ValueExpression ve = component.getValueExpression("someAttrib");
if (ve != null) {
ve.setValue(context.getELContext(), "-666-");
}Don't do this.
You shouldn't have to manually query the ValueExpressions.
You should use the attributes map as BalusC pointed out.
If you do: component.getAttributes().put("someAttrib", "-666-"),
then the attributes map implementation will:
1. check to see if the component has a matching property.
If so, it will invoke the setter.
2. If there is no property, then it will check for a ValueExpression
mapped to "someAttrib". If it exists, it will call setValue() on
the ValueExpression.
3. If none of the above are resolved, then it will store the value
as a local map value.