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## RichFaces
Tag columns

The <rich:columns> is a component that allows to create a dynamic set of columns from your model.

Tag Information
Tag Class | org.richfaces.taglib.ColumnsTag
TagExtraInfo Class | None
Body Content | JSP
Display Name | None

Attributes
Name | Required | Request-time | Type | Description
begin | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.Object`) | The first iteration item
breakBefore | false | false | `javax.el.ValueExpression` (must evaluate to `boolean`) | if "true" next column begins from the first row
colspan | false | false | `javax.el.ValueExpression` (must evaluate to `int`) | Corresponds to the HTML colspan attribute
columns | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.Object`) | Number of columns to be rendered
comparator | false | false | `javax.el.ValueExpression` (must evaluate to `java.util.Comparator`) | Defines value binding to the comparator that is used to compare the values
dir | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.String`) | Direction indication for text that does not inherit directionality. Valid values are "LTR" (left-to-right) and "RTL" (right-to-left)
end | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.Object`) | The last iteration item
filterBy | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.Object`) | Defines iterable object property which is used when filtering performed.
filterEvent | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.String`) | Event for filter input that forces the filtration (default value is "onchange")
filterExpression | false | false | `javax.el.ValueExpression` (must evaluate to `boolean`) | Attribute defines a bean property which is used for filtering of a column
filterMethod | false | false | `javax.el.MethodExpression` (signature must match `boolean filterMethod(java.lang.Object)`) | This attribute is defined with method binding. This method accepts on Object parameter and return boolean value
filterValue | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.String`) | Defines current filtering value
footerClass | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.String`) | Space-separated list of CSS style class(es) that are be applied to any footer generated for this table
headerClass | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.String`) | Space-separated list of CSS style class(es) that are be applied to any header generated for this table
id | false | false | `java.lang.String` | Every component may have a unique id that is automatically created if omitted
index | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.Object`) | The current counter
label | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.String`) | Column label for drag indicator. Usable only for extendedDataTable component
lang | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.String`) | Code describing the language used in the generated markup for this component
rendered | false | false | `javax.el.ValueExpression` (must evaluate to `boolean`) | Attribute defines if component should be rendered. Default value is "true".
rowspan | false | false | `javax.el.ValueExpression` (must evaluate to `int`) | Corresponds to the HTML rowspan attribute
selfSorted | false | false | `javax.el.ValueExpression` (must evaluate to `boolean`) | Manages if the header of the column is clickable, icons rendered and sorting is fired after click on the header. You need to define this attribute inside <rich:dataTable> component. Default value is "true"
sortBy | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.Object`) | Defines a bean property which is used for sorting of a column. This attribute used with <rich:dataTable>
sortExpression | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.String`) | Defines a bean property which is used for sorting of a column and used only with <rich:scrollableDataTable>.
sortIcon | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.String`) | Defines sort icon. The value for the attribute is context related.
sortIconAscending | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.String`) | Defines sort icon for ascending order. The value for the attribute is context related.
sortIconDescending | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.String`) | Defines sort icon for descending order. The value for the attribute is context related.
sortOrder | false | false | `javax.el.ValueExpression` (must evaluate to `org.richfaces.model.Ordering`) | SortOrder is an enumeration of the possible sort orderings. Default value is "UNSORTED"
sortable | false | false | `javax.el.ValueExpression` (must evaluate to `boolean`) | Boolean attribute. If "true" it's possible to sort the column content after click on the header. Default value is "true"
style | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.String`) | CSS style(s) is/are to be applied when this component is rendered
styleClass | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.String`) | Corresponds to the HTML class attribute
title | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.String`) | Advisory title information about markup elements generated for this component
value | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.Object`) | The current value for this component
var | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.Object`) | The current variable
visible | false | false | `javax.el.ValueExpression` (must evaluate to `boolean`) | The attribute is used to define whether the component is visible or not. The default value is "true".
width | false | false | `javax.el.ValueExpression` (must evaluate to `java.lang.String`) | Attribute defines width of column.

Variables
| No Variables Defined.

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