# Class Resolver

java.lang.Object
org.apache.catalina.valves.rewrite.Resolver

Direct Known Subclasses:
  `ResolverImpl`

public abstract class Resolver extends Object
Resolver abstract class.

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `Resolver()`
  Default constructor.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `abstract Charset`
  `getUriCharset()`
  Return the URI character set.
  `abstract String`
  `resolve(String key)`
  Resolve a key to a string value.
  `String`
  `resolveEnv(String key)`
  Resolve an environment variable key to a string value.
  `abstract String`
  `resolveHttp(String key)`
  Resolve an HTTP header key to a string value.
  `abstract boolean`
  `resolveResource(int type, String name)`
  Resolve a resource check.
  `abstract String`
  `resolveSsl(String key)`
  Resolve an SSL variable key to a string value.

  ### Methods inherited from class Object

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

- ## Constructor Details

  - ### Resolver

    public Resolver()
    Default constructor.

- ## Method Details

  - ### resolve

    public abstract String resolve(String key)
    Resolve a key to a string value.
    Parameters:
      `key` - The key to resolve
    Returns:
      The resolved string value

  - ### resolveEnv

    public String resolveEnv(String key)
    Resolve an environment variable key to a string value.
    Parameters:
      `key` - The key to resolve
    Returns:
      The resolved string value

  - ### resolveSsl

    public abstract String resolveSsl(String key)
    Resolve an SSL variable key to a string value.
    Parameters:
      `key` - The key to resolve
    Returns:
      The resolved string value

  - ### resolveHttp

    public abstract String resolveHttp(String key)
    Resolve an HTTP header key to a string value.
    Parameters:
      `key` - The key to resolve
    Returns:
      The resolved string value

  - ### resolveResource

    public abstract boolean resolveResource(int type, String name)
    Resolve a resource check.
    Parameters:
      `type` - The type of resource check (0=directory, 1=file, 2=non-empty file)
      `name` - The resource name
    Returns:
      True if the resource matches the specified type

  - ### getUriCharset

    public abstract Charset getUriCharset()
    Return the URI character set.
    Returns:
      The URI character set