# Package org.apache.tomcat.util.descriptor.web

This package contains Java objects that represent complex data structures from the web application deployment descriptor file (`web.xml`). It is assumed that these objects will be initialized within the context of a single thread, and then referenced in a read-only manner subsequent to that time. Therefore, no multi-thread synchronization is utilized within the implementation classes.

Interface Summary
Injectable
NamingResources: Defines an interface for the object that is added to the representation of a JNDI resource in web.xml to enable it to also be the implementation of that JNDI resource.

Class Summary
ApplicationParameter: Representation of a context initialization parameter that is configured in the server configuration file, rather than the application deployment descriptor.
Constants
ContextEjb: Representation of an EJB resource reference for a web application, as represented in a `<ejb-ref>` element in the deployment descriptor.
ContextEnvironment: Representation of an application environment entry, as represented in an `<env-entry>` element in the deployment descriptor.
ContextHandler: Representation of a handler reference for a web service, as represented in a `<handler>` element in the deployment descriptor.
ContextLocalEjb: Representation of a local EJB resource reference for a web application, as represented in a `<ejb-local-ref>` element in the deployment descriptor.
ContextResource: Representation of a resource reference for a web application, as represented in a `<resource-ref>` element in the deployment descriptor.
ContextResourceEnvRef: Representation of an application resource reference, as represented in an `<res-env-refy>` element in the deployment descriptor.
ContextResourceLink: Representation of a resource link for a web application, as represented in a `<ResourceLink>` element in the server configuration file.
ContextService: Representation of a web service reference for a web application, as represented in a `<service-ref>` element in the deployment descriptor.
ContextTransaction: Representation of an application resource reference, as represented in an `<res-env-refy>` element in the deployment descriptor.
ErrorPage: Representation of an error page element for a web application, as represented in a `<error-page>` element in the deployment descriptor.
FilterDef: Representation of a filter definition for a web application, as represented in a `<filter>` element in the deployment descriptor.
FilterMap: Representation of a filter mapping for a web application, as represented in a `<filter-mapping>` element in the deployment descriptor.
FragmentJarScannerCallback: Callback handling a web-fragment.xml descriptor.
InjectionTarget
JspConfigDescriptorImpl
JspPropertyGroup: Representation of a jsp-property-group element in web.xml.
JspPropertyGroupDescriptorImpl
LoginConfig: Representation of a login configuration element for a web application, as represented in a `<login-config>` element in the deployment descriptor.
MessageDestination: Representation of a message destination for a web application, as represented in a `<message-destination>` element in the deployment descriptor.
MessageDestinationRef: Representation of a message destination reference for a web application, as represented in a `<message-destination-ref>` element in the deployment descriptor.
MultipartDef: Representation of a the multipart configuration for a servlet.
ResourceBase: Representation of an Context element
SecurityCollection: Representation of a web resource collection for a web application's security constraint, as represented in a `<web-resource-collection>` element in the deployment descriptor.
SecurityConstraint: Representation of a security constraint element for a web application, as represented in a `<security-constraint>` element in the deployment descriptor.
SecurityRoleRef: Representation of a security role reference for a web application, as represented in a `<security-role-ref>` element in the deployment descriptor.
ServletDef: Representation of a servlet definition for a web application, as represented in a `<servlet>` element in the deployment descriptor.
SessionConfig: Representation of a session configuration element for a web application, as represented in a `<session-config>` element in the deployment descriptor.
TaglibDescriptorImpl
WebRuleSet: RuleSet for processing the contents of a web application deployment descriptor (`/WEB-INF/web.xml`) resource.
WebXml: Representation of common elements of web.xml and web-fragment.xml.
WebXmlParser
XmlEncodingBase: Base class for those elements that need to track the encoding used in the source XML.