org.apache.catalina.ssi

## Interface SSIExternalResolver

- All Known Implementing Classes:
    SSIServletExternalResolver

      public interface SSIExternalResolver

  Interface used by SSIMediator to talk to the 'outside world' ( usually a servlet )
  Author:
    Dan Sandberg

- - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addVariableNames(Collection<String> variableNames)` Adds any external variables to the variableNames collection.
    `Date` | `getCurrentDate()` Returns the current date.
    `long` | `getFileLastModified(String path, boolean virtual)`
    `long` | `getFileSize(String path, boolean virtual)`
    `String` | `getFileText(String path, boolean virtual)`
    `String` | `getVariableValue(String name)`
    `void` | `log(String message, Throwable throwable)`
    `void` | `setVariableValue(String name, String value)` Set the named variable to the specified value.

- - ### Method Detail

    - #### addVariableNames

          void addVariableNames(Collection<String> variableNames)

      Adds any external variables to the variableNames collection.
      Parameters:
        `variableNames` - the collection to add to

    - #### getVariableValue

          String getVariableValue(String name)

    - #### setVariableValue

          void setVariableValue(String name,
                              String value)

      Set the named variable to the specified value. If value is null, then the variable will be removed ( ie. a call to getVariableValue will return null )
      Parameters:
        `name` - of the variable
        `value` - of the variable

    - #### getCurrentDate

          Date getCurrentDate()

      Returns the current date. This is useful for putting the SSI stuff in a regression test. Since you can make the current date a constant, it makes testing easier since the output won't change.
      Returns:
        the data

    - #### getFileSize

          long getFileSize(String path,
                         boolean virtual)
                           throws IOException

      Throws:
        `IOException`

    - #### getFileLastModified

          long getFileLastModified(String path,
                                 boolean virtual)
                                   throws IOException

      Throws:
        `IOException`

    - #### getFileText

          String getFileText(String path,
                           boolean virtual)
                             throws IOException

      Throws:
        `IOException`

    - #### log

          void log(String message,
                 Throwable throwable)

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