Package org.apache.catalina.util

# Class ExtensionValidator

java.lang.Object
org.apache.catalina.util.ExtensionValidator

public final class ExtensionValidator extends Object
Ensures that all extension dependencies are resolved for a WEB application are met. This class builds a list of extensions available to an application and then validates those extensions. See http://docs.oracle.com/javase/1.4.2/docs/guide/extensions/spec.html for a detailed explanation of the extension mechanism in Java.

Author:
  Greg Murray, Justyna Horwat

## Constructor Summary

Constructors
Constructor
Description
`ExtensionValidator()`

## Method Summary

Modifier and Type
Method
Description
`static void`
`addSystemResource(File jarFile)`
Checks to see if the given system JAR file contains a MANIFEST, and adds it to the container's manifest resources.
`static boolean`
`validateApplication(WebResourceRoot resources, Context context)`
Runtime validation of a Web Application.

### Methods inherited from class java.lang.Object

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

## Constructor Details

### ExtensionValidator

public ExtensionValidator()

## Method Details

### validateApplication

public static boolean validateApplication(WebResourceRoot resources, Context context) throws IOException
Runtime validation of a Web Application. This method uses JNDI to look up the resources located under a `DirContext`. It locates Web Application MANIFEST.MF file in the /META-INF/ directory of the application and all MANIFEST.MF files in each JAR file located in the WEB-INF/lib directory and creates an `ArrayList` of `ManifestResource` objects. These objects are then passed to the validateManifestResources method for validation.

Parameters:
  `resources` - The resources configured for this Web Application
  `context` - The context from which the Logger and path to the application
Returns:
  true if all required extensions satisfied
Throws:
  `IOException` - Error reading resources needed for validation

### addSystemResource

public static void addSystemResource(File jarFile) throws IOException
Checks to see if the given system JAR file contains a MANIFEST, and adds it to the container's manifest resources.

Parameters:
  `jarFile` - The system JAR whose manifest to add
Throws:
  `IOException` - Error reading JAR file