org.eclipse.jetty.rewrite.handler

## Class PatternRule

- java.lang.Object
- - org.eclipse.jetty.rewrite.handler.Rule
  - - org.eclipse.jetty.rewrite.handler.PatternRule

- Direct Known Subclasses:
    CookiePatternRule, HeaderPatternRule, ProxyRule, RedirectPatternRule, ResponsePatternRule, RewritePatternRule

      public abstract class PatternRule
      extends Rule

  Abstract rule that use a `PathMap` for pattern matching. It uses the servlet pattern syntax.

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class org.eclipse.jetty.rewrite.handler.Rule

      `Rule.ApplyURI`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected String` | `_pattern`

    - ### Fields inherited from class org.eclipse.jetty.rewrite.handler.Rule

      `_handling, _terminating`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `PatternRule()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected abstract String` | `apply(String target, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)` Apply the rule to the request
    `String` | `getPattern()`
    `String` | `matchAndApply(String target, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)` This method calls tests the rule against the request/response pair and if the Rule applies, then the rule's action is triggered.
    `void` | `setPattern(String pattern)` Sets the rule pattern.
    `String` | `toString()` Returns the rule pattern.

    - ### Methods inherited from class org.eclipse.jetty.rewrite.handler.Rule

      `isHandling, isTerminating, setHandling, setTerminating`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- - ### Field Detail

    - #### _pattern

          protected String _pattern

  - ### Constructor Detail

    - #### PatternRule

          public PatternRule()

  - ### Method Detail

    - #### getPattern

          public String getPattern()

    - #### setPattern

          public void setPattern(String pattern)

      Sets the rule pattern.
      Parameters:
        `pattern` - the pattern

    - #### matchAndApply

          public String matchAndApply(String target,
                             javax.servlet.http.HttpServletRequest request,
                             javax.servlet.http.HttpServletResponse response)
                               throws IOException

      Description copied from class: `Rule`
      This method calls tests the rule against the request/response pair and if the Rule applies, then the rule's action is triggered.
      Specified by:
        `matchAndApply` in class `Rule`
      Parameters:
        `target` - The target of the request
      Returns:
        The new target if the rule has matched, else null
      Throws:
        `IOException` - TODO

    - #### apply

          protected abstract String apply(String target,
                     javax.servlet.http.HttpServletRequest request,
                     javax.servlet.http.HttpServletResponse response)
                                   throws IOException

      Apply the rule to the request
      Parameters:
        `target` - field to attempt match
        `request` - request object
        `response` - response object
      Returns:
        The target (possible updated)
      Throws:
        `IOException` - exceptions dealing with operating on request or response objects

    - #### toString

          public String toString()

      Returns the rule pattern.
      Overrides:
        `toString` in class `Rule`

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