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## org.apache.catalina
Interface Mapper

All Known Implementing Classes:
  FastEngineMapper, StandardContextMapper, StandardEngineMapper, StandardHostMapper

public interface Mapper

Interface defining methods that a parent Container may implement to select a subordinate Container to process a particular Request, optionally modifying the properties of the Request to reflect the selections made.

A typical Container may be associated with a single Mapper that processes all requests to that Container, or a Mapper per request protocol that allows the same Container to support multiple protocols at once.

Version:
  $Revision: 1.3 $ $Date: 2001/07/22 20:13:30 $
Author:
  Craig R. McClanahan

Method Summary
`Container` | `getContainer()` Return the Container with which this Mapper is associated.
`java.lang.String` | `getProtocol()` Return the protocol for which this Mapper is responsible.
`Container` | `map(Request request, boolean update)` Return the child Container that should be used to process this Request, based upon its characteristics.
`void` | `setContainer(Container container)` Set the Container with which this Mapper is associated.
`void` | `setProtocol(java.lang.String protocol)` Set the protocol for which this Mapper is responsible.

Method Detail

### getContainer

    public Container getContainer()

  Return the Container with which this Mapper is associated.

### setContainer

    public void setContainer(Container container)

  Set the Container with which this Mapper is associated.

  Parameters:
    `container` - The newly associated Container
  Throws:
    `java.lang.IllegalArgumentException` - if this Container is not acceptable to this Mapper

### getProtocol

    public java.lang.String getProtocol()

  Return the protocol for which this Mapper is responsible.

### setProtocol

    public void setProtocol(java.lang.String protocol)

  Set the protocol for which this Mapper is responsible.

  Parameters:
    `protocol` - The newly associated protocol

### map

    public Container map(Request request,
                         boolean update)

  Return the child Container that should be used to process this Request, based upon its characteristics. If no such child Container can be identified, return `null` instead.

  Parameters:
    `request` - Request being processed
    `update` - Update the Request to reflect the mapping selection?

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