[#BloombergLP-ball-AttributeContainer]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/ball.adoc[ball]::AttributeContainer
:relfileprefix: ../../
:mrdocs:

This class defines a protocol for a container of attribute values. The attribute container provides a `hasValue()` method to determine whether an attribute value is in the container.

== Synopsis

Declared in `<ball_attributecontainer.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class AttributeContainer;
----

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/ball/AttributeContainer/2destructor.adoc[`~AttributeContainer`] [.small]#[destructor]# [.small]#[virtual]#
| Destroy this object.
| xref:BloombergLP/ball/AttributeContainer/hasValue.adoc[`hasValue`]  [.small]#[virtual]#
| Return `true` if a attribute having the specified `value` exists in this object, and `false` otherwise.
| xref:BloombergLP/ball/AttributeContainer/print.adoc[`print`]  [.small]#[virtual]#
| Format this object to the specified output `stream` at the (absolute value of) the optionally specified indentation `level` and return a reference to `stream`. If `level` is specified, optionally specify `spacesPerLevel`, the number of spaces per indentation level for this and all of its nested objects. If `level` is negative, suppress indentation of the first line. If `spacesPerLevel` is negative, format the entire output on one line, suppressing all but the initial indentation (as governed by `level`). If `stream` is not valid on entry, this operation has no effect.
| xref:BloombergLP/ball/AttributeContainer/visitAttributes.adoc[`visitAttributes`]  [.small]#[virtual]#
| Invoke the specified `visitor` function for all attributes in this container.
|===


== Derived Classes

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/ball/DefaultAttributeContainer.adoc[`DefaultAttributeContainer`] 
| A `DefaultAttributeContainer` object contains a collection of (unique) attributes values.
| xref:BloombergLP/ball/ScopedAttribute_Container.adoc[`ScopedAttribute_Container`] 
| This component‐private class is a concrete implementation of the `AttributeContainer` protocol for a single attribute.
|===


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