# Package org.apache.tomcat.util.scan

This package contains the common classes used to perform configuration scanning for Catalina and Jasper.

- Class Summary
  Class | Description
  --- | ---
  AbstractInputStreamJar | Base implementation of Jar for implementations that use a JarInputStream to access the JAR file.
  Constants | String constants for the scan package.
  JarFactory | Provide a mechanism to obtain objects that implement `Jar`.
  JarFileUrlJar | Implementation of `Jar` that is optimised for file based JAR URLs that refer directly to a JAR file (e.g URLs of the form jar:file: ... .jar!
  JarFileUrlNestedJar | Implementation of `Jar` that is optimised for file based JAR URLs that refer to a JAR file nested inside a WAR (e.g URLs of the form jar:file: ... .war!
  NonClosingJarInputStream | When using a `JarInputStream` with an XML parser, the stream will be closed by the parser.
  ReferenceCountedJar | This class provides a wrapper around `Jar` that uses reference counting to close and re-create the wrapped `Jar` instance as required.
  StandardJarScanFilter |
  StandardJarScanner | The default `JarScanner` implementation scans the WEB-INF/lib directory followed by the provided classloader and then works up the classloader hierarchy.
  UrlJar | Implementation of `Jar` that is optimised for non-file based JAR URLs.