org.apache.catalina.webresources

Class JarContents

java.lang.Object

org.apache.catalina.webresources.JarContents

public final class JarContents
extends java.lang.Object

This class represents the contents of a jar by determining whether a given resource might be in the cache, based on a bloom filter. This is not a general-purpose bloom filter because it contains logic to strip out characters from the beginning of the key. The hash methods are simple but good enough for this purpose.

Constructor Summary

Constructors

Constructor and Description
JarContents(java.util.jar.JarFile jar) Parses the passed-in jar and populates the bit array.

Method Summary

Modifier and Type	Method and Description
boolean	mightContainResource(java.lang.String path, java.lang.String webappRoot) Method that identifies whether a given path MIGHT be in this jar.

Methods inherited from class java.lang.Object

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

Constructor Detail

JarContents

public JarContents(java.util.jar.JarFile jar)

Parses the passed-in jar and populates the bit array.

Parameters:

jar - the JAR file

Method Detail

mightContainResource

public final boolean mightContainResource(java.lang.String path,
                                          java.lang.String webappRoot)

Method that identifies whether a given path MIGHT be in this jar. Uses the Bloom filter mechanism.

Parameters:

path - Requested path. Sometimes starts with "/WEB-INF/classes".

webappRoot - The value of the webapp location, which can be stripped from the path. Typically is "/WEB-INF/classes".

Returns:

Whether the prefix of the path is known to be in this jar.