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## org.jboss.portal.common.invocation
Interface InvocationContext

All Known Implementing Classes:
  AbstractInvocationContext

    public interface InvocationContext

Version:
  $Revision: 7228 $
Author:
  Julien Viet

Method Summary
`java.lang.Object` | `getAttribute(Scope attrScope, java.lang.Object attrKey)` Returns an attribute value.
`AttributeResolver` | `getAttributeResolver(Scope attrScope)` Return the attribute resolver of this context.
`void` | `removeAttribute(Scope attrScope, java.lang.Object attrKey)` Remove an attribute value.
`void` | `setAttribute(Scope attrScope, java.lang.Object attrKey, java.lang.Object attrValue)` Update an attribute value.

Method Detail

### getAttributeResolver

    AttributeResolver getAttributeResolver(Scope attrScope)
                                           throws java.lang.IllegalArgumentException

  Return the attribute resolver of this context.

  Parameters:
    `attrScope` - the attribute resolver scope
  Returns:
    the attribute resolver or null if not found
  Throws:
    `java.lang.IllegalArgumentException` - if the attribute scope is invalid

### getAttribute

    java.lang.Object getAttribute(Scope attrScope,
                                  java.lang.Object attrKey)
                                  throws java.lang.IllegalArgumentException

  Returns an attribute value.

  Parameters:
    `attrScope` - the attribute scope
    `attrKey` -
  Returns:
    the attribute value or null if not found
  Throws:
    `java.lang.IllegalArgumentException` - if the attribute key or the attribute scope is not valid

### setAttribute

    void setAttribute(Scope attrScope,
                      java.lang.Object attrKey,
                      java.lang.Object attrValue)
                      throws java.lang.IllegalArgumentException

  Update an attribute value.

  Parameters:
    `attrScope` - the attribute scope
    `attrKey` -
    `attrValue` - the attribute value
  Throws:
    `java.lang.IllegalArgumentException` - if the attribute key or the attribute scope is not valid

### removeAttribute

    void removeAttribute(Scope attrScope,
                         java.lang.Object attrKey)

  Remove an attribute value. If the attribute value is null the resolver must treat the operation as a removal of the attribute.

  Parameters:
    `attrKey` -
  Throws:
    `java.lang.IllegalArgumentException` - if the attribute key is null or the attribute scope is not valid

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