# Package org.apache.tomcat.util.scan

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

Class Summary
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.