Examples of edu.emory.mathcs.util.classloader.URIClassLoader

• edu.emory.mathcs.util.classloader.URIClassLoader
  Equivalent of java.net.URLClassloader but without bugs related to ill-formed URLs and with customizable JAR caching policy. The standard URLClassLoader accepts URLs containing spaces and other characters which are forbidden in the URI syntax, according to the RFC 2396. As a workaround to this problem, Java escapes and un-escapes URLs in various arbitrary places; however, this is inconsistent and leads to numerous problems with URLs referring to local files with spaces in the path. SUN acknowledges the problem, but refuses to modify the behavior for compatibility reasons; see Java Bug Parade 4273532, 4466485.

  Additionally, the JAR caching policy used by URLClassLoader is system-wide and inflexible: once downloaded JAR files are never re-downloaded, even if one creates a fresh instance of the class loader that happens to have the same URL in its search path. In fact, that policy is a security vulnerability: it is possible to crash any URL class loader, thus affecting potentially separate part of the system, by creating URL connection to one of the URLs of that class loader search path and closing the associated JAR file. See Java Bug Parade 4405789, 4388666, 4639900.

  This class avoids these problems by 1) using URIs instead of URLs for the search path (thus enforcing strict syntax conformance and defining precise escaping semantics), and 2) using custom URLStreamHandler which ensures per-classloader JAR caching policy. @author Dawid Kurzyniec @version 1.0 @see java.io.File#toURL @see java.io.File#toURI

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