## org.apache.naming.resources
Class FileDirContext

    java.lang.Object
      org.apache.naming.resources.BaseDirContext
          org.apache.naming.resources.FileDirContext

All Implemented Interfaces:
  javax.naming.Context, javax.naming.directory.DirContext

public class FileDirContext
extends BaseDirContext

Filesystem Directory Context implementation helper class.

Version:
  $Revision: 1.4 $ $Date: 2004/02/27 14:58:54 $
Author:
  Remy Maucherat

Nested Class Summary
`protected class` `FileDirContext.FileResource` This specialized resource implementation avoids opening the IputStream to the file right away (which would put a lock on the file).
`protected class` `FileDirContext.FileResourceAttributes` This specialized resource attribute implementation does some lazy reading (to speed up simple checks, like checking the last modified date).

Field Summary
`protected java.lang.String` `absoluteBase` Absolute normalized filename of the base.
`protected boolean` `allowLinking` Allow linking.
`protected java.io.File` `base` The document base directory.
`protected static int` `BUFFER_SIZE` The descriptive information string for this implementation.
`protected boolean` `caseSensitive` Case sensitivity.

Fields inherited from class org.apache.naming.resources.BaseDirContext
`cached, cacheMaxSize, cacheTTL, debug, docBase, env, nameParser, sm`

Fields inherited from interface javax.naming.directory.DirContext
`ADD_ATTRIBUTE, REMOVE_ATTRIBUTE, REPLACE_ATTRIBUTE`

Fields inherited from interface javax.naming.Context
`APPLET, AUTHORITATIVE, BATCHSIZE, DNS_URL, INITIAL_CONTEXT_FACTORY, LANGUAGE, OBJECT_FACTORIES, PROVIDER_URL, REFERRAL, SECURITY_AUTHENTICATION, SECURITY_CREDENTIALS, SECURITY_PRINCIPAL, SECURITY_PROTOCOL, STATE_FACTORIES, URL_PKG_PREFIXES`

Constructor Summary
`FileDirContext()` Builds a file directory context using the given environment.
`FileDirContext(java.util.Hashtable env)` Builds a file directory context using the given environment.

Method Summary
`void` `bind(java.lang.String name, java.lang.Object obj, javax.naming.directory.Attributes attrs)` Binds a name to an object, along with associated attributes.
`javax.naming.directory.DirContext` `createSubcontext(java.lang.String name, javax.naming.directory.Attributes attrs)` Creates and binds a new context, along with associated attributes.
`void` `destroySubcontext(java.lang.String name)` Destroys the named context and removes it from the namespace.
`protected java.io.File` `file(java.lang.String name)` Return a File object representing the specified normalized context-relative path if it exists and is readable.
`boolean` `getAllowLinking()` Is linking allowed.
`javax.naming.directory.Attributes` `getAttributes(java.lang.String name, java.lang.String[] attrIds)` Retrieves selected attributes associated with a named object.
`java.lang.String` `getNameInNamespace()` Retrieves the full name of this context within its own namespace.
`javax.naming.directory.DirContext` `getSchema(java.lang.String name)` Retrieves the schema associated with the named object.
`javax.naming.directory.DirContext` `getSchemaClassDefinition(java.lang.String name)` Retrieves a context containing the schema objects of the named object's class definitions.
`boolean` `isCaseSensitive()` Is case sensitive ?
`protected java.util.Vector` `list(java.io.File file)` List the resources which are members of a collection.
`javax.naming.NamingEnumeration` `list(java.lang.String name)` Enumerates the names bound in the named context, along with the class names of objects bound to them.
`javax.naming.NamingEnumeration` `listBindings(java.lang.String name)` Enumerates the names bound in the named context, along with the objects bound to them.
`java.lang.Object` `lookup(java.lang.String name)` Retrieves the named object.
`java.lang.Object` `lookupLink(java.lang.String name)` Retrieves the named object, following links except for the terminal atomic component of the name.
`void` `modifyAttributes(java.lang.String name, int mod_op, javax.naming.directory.Attributes attrs)` Modifies the attributes associated with a named object.
`void` `modifyAttributes(java.lang.String name, javax.naming.directory.ModificationItem[] mods)` Modifies the attributes associated with a named object using an an ordered list of modifications.
`protected java.lang.String` `normalize(java.lang.String path)` Return a context-relative path, beginning with a "/", that represents the canonical version of the specified path after ".." and "." elements are resolved out.
`void` `rebind(java.lang.String name, java.lang.Object obj, javax.naming.directory.Attributes attrs)` Binds a name to an object, along with associated attributes, overwriting any existing binding.
`void` `release()` Release any resources allocated for this directory context.
`void` `rename(java.lang.String oldName, java.lang.String newName)` Binds a new name to the object bound to an old name, and unbinds the old name.
`javax.naming.NamingEnumeration` `search(java.lang.String name, javax.naming.directory.Attributes matchingAttributes)` Searches in a single context for objects that contain a specified set of attributes.
`javax.naming.NamingEnumeration` `search(java.lang.String name, javax.naming.directory.Attributes matchingAttributes, java.lang.String[] attributesToReturn)` Searches in a single context for objects that contain a specified set of attributes, and retrieves selected attributes.
`javax.naming.NamingEnumeration` `search(java.lang.String name, java.lang.String filterExpr, java.lang.Object[] filterArgs, javax.naming.directory.SearchControls cons)` Searches in the named context or object for entries that satisfy the given search filter.
`javax.naming.NamingEnumeration` `search(java.lang.String name, java.lang.String filter, javax.naming.directory.SearchControls cons)` Searches in the named context or object for entries that satisfy the given search filter.
`void` `setAllowLinking(boolean allowLinking)` Set allow linking.
`void` `setCaseSensitive(boolean caseSensitive)` Set case sensitivity.
`void` `setDocBase(java.lang.String docBase)` Set the document root.
`void` `unbind(java.lang.String name)` Unbinds the named object.

Methods inherited from class org.apache.naming.resources.BaseDirContext

`addToEnvironment, allocate, bind, bind, bind, close, composeName, composeName, createSubcontext, createSubcontext, createSubcontext, destroySubcontext, getAttributes, getAttributes, getAttributes, getCacheMaxSize, getCacheTTL, getDebug, getDocBase, getEnvironment, getNameParser, getNameParser, getSchema, getSchemaClassDefinition, isCached, list, listBindings, lookup, lookupLink, modifyAttributes, modifyAttributes, rebind, rebind, rebind, removeFromEnvironment, rename, search, search, search, search, setCached, setCacheMaxSize, setCacheTTL, setDebug, unbind`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### BUFFER_SIZE

    protected static final int BUFFER_SIZE

  The descriptive information string for this implementation.

  See Also:
    Constant Field Values

### base

    protected java.io.File base

  The document base directory.

### absoluteBase

    protected java.lang.String absoluteBase

  Absolute normalized filename of the base.

### caseSensitive

    protected boolean caseSensitive

  Case sensitivity.

### allowLinking

    protected boolean allowLinking

  Allow linking.

Constructor Detail

### FileDirContext

    public FileDirContext()

  Builds a file directory context using the given environment.

### FileDirContext

    public FileDirContext(java.util.Hashtable env)

  Builds a file directory context using the given environment.

Method Detail

### setDocBase

    public void setDocBase(java.lang.String docBase)

  Set the document root.

  Overrides:
    `setDocBase` in class `BaseDirContext`
  Parameters:
    `docBase` - The new document root
  Throws:
    `java.lang.IllegalArgumentException` - if the specified value is not supported by this implementation
    `java.lang.IllegalArgumentException` - if this would create a malformed URL

### setCaseSensitive

    public void setCaseSensitive(boolean caseSensitive)

  Set case sensitivity.

### isCaseSensitive

    public boolean isCaseSensitive()

  Is case sensitive ?

### setAllowLinking

    public void setAllowLinking(boolean allowLinking)

  Set allow linking.

### getAllowLinking

    public boolean getAllowLinking()

  Is linking allowed.

### release

    public void release()

  Release any resources allocated for this directory context.

  Overrides:
    `release` in class `BaseDirContext`

### lookup

    public java.lang.Object lookup(java.lang.String name)
                            throws javax.naming.NamingException

  Retrieves the named object.

  Specified by:
    `lookup` in interface `javax.naming.Context`
  Specified by:
    `lookup` in class `BaseDirContext`
  Parameters:
    `name` - the name of the object to look up
  Returns:
    the object bound to name
  Throws:
    `javax.naming.NamingException` - if a naming exception is encountered

### unbind

    public void unbind(java.lang.String name)
                throws javax.naming.NamingException

  Unbinds the named object. Removes the terminal atomic name in name from the target context--that named by all but the terminal atomic part of name.

  This method is idempotent. It succeeds even if the terminal atomic name is not bound in the target context, but throws NameNotFoundException if any of the intermediate contexts do not exist.

  Specified by:
    `unbind` in interface `javax.naming.Context`
  Specified by:
    `unbind` in class `BaseDirContext`
  Parameters:
    `name` - the name to bind; may not be empty
  Throws:
    `NameNotFoundException` - if an intermediate context does not exist
    `javax.naming.NamingException` - if a naming exception is encountered

### rename

    public void rename(java.lang.String oldName,
                       java.lang.String newName)
                throws javax.naming.NamingException

  Binds a new name to the object bound to an old name, and unbinds the old name. Both names are relative to this context. Any attributes associated with the old name become associated with the new name. Intermediate contexts of the old name are not changed.

  Specified by:
    `rename` in interface `javax.naming.Context`
  Specified by:
    `rename` in class `BaseDirContext`
  Parameters:
    `oldName` - the name of the existing binding; may not be empty
    `newName` - the name of the new binding; may not be empty
  Throws:
    `javax.naming.NameAlreadyBoundException` - if newName is already bound
    `javax.naming.NamingException` - if a naming exception is encountered

### list

    public javax.naming.NamingEnumeration list(java.lang.String name)
                                        throws javax.naming.NamingException

  Enumerates the names bound in the named context, along with the class names of objects bound to them. The contents of any subcontexts are not included.

  If a binding is added to or removed from this context, its effect on an enumeration previously returned is undefined.

  Specified by:
    `list` in interface `javax.naming.Context`
  Specified by:
    `list` in class `BaseDirContext`
  Parameters:
    `name` - the name of the context to list
  Returns:
    an enumeration of the names and class names of the bindings in this context. Each element of the enumeration is of type NameClassPair.
  Throws:
    `javax.naming.NamingException` - if a naming exception is encountered

### listBindings

    public javax.naming.NamingEnumeration listBindings(java.lang.String name)
                                                throws javax.naming.NamingException

  Enumerates the names bound in the named context, along with the objects bound to them. The contents of any subcontexts are not included.

  If a binding is added to or removed from this context, its effect on an enumeration previously returned is undefined.

  Specified by:
    `listBindings` in interface `javax.naming.Context`
  Specified by:
    `listBindings` in class `BaseDirContext`
  Parameters:
    `name` - the name of the context to list
  Returns:
    an enumeration of the bindings in this context. Each element of the enumeration is of type Binding.
  Throws:
    `javax.naming.NamingException` - if a naming exception is encountered

### destroySubcontext

    public void destroySubcontext(java.lang.String name)
                           throws javax.naming.NamingException

  Destroys the named context and removes it from the namespace. Any attributes associated with the name are also removed. Intermediate contexts are not destroyed.

  This method is idempotent. It succeeds even if the terminal atomic name is not bound in the target context, but throws NameNotFoundException if any of the intermediate contexts do not exist. In a federated naming system, a context from one naming system may be bound to a name in another. One can subsequently look up and perform operations on the foreign context using a composite name. However, an attempt destroy the context using this composite name will fail with NotContextException, because the foreign context is not a "subcontext" of the context in which it is bound. Instead, use unbind() to remove the binding of the foreign context. Destroying the foreign context requires that the destroySubcontext() be performed on a context from the foreign context's "native" naming system.

  Specified by:
    `destroySubcontext` in interface `javax.naming.Context`
  Specified by:
    `destroySubcontext` in class `BaseDirContext`
  Parameters:
    `name` - the name of the context to be destroyed; may not be empty
  Throws:
    `NameNotFoundException` - if an intermediate context does not exist
    `NotContextException` - if the name is bound but does not name a context, or does not name a context of the appropriate type
    `javax.naming.NamingException`

### lookupLink

    public java.lang.Object lookupLink(java.lang.String name)
                                throws javax.naming.NamingException

  Retrieves the named object, following links except for the terminal atomic component of the name. If the object bound to name is not a link, returns the object itself.

  Specified by:
    `lookupLink` in interface `javax.naming.Context`
  Specified by:
    `lookupLink` in class `BaseDirContext`
  Parameters:
    `name` - the name of the object to look up
  Returns:
    the object bound to name, not following the terminal link (if any).
  Throws:
    `javax.naming.NamingException` - if a naming exception is encountered

### getNameInNamespace

    public java.lang.String getNameInNamespace()
                                        throws javax.naming.NamingException

  Retrieves the full name of this context within its own namespace.

  Many naming services have a notion of a "full name" for objects in their respective namespaces. For example, an LDAP entry has a distinguished name, and a DNS record has a fully qualified name. This method allows the client application to retrieve this name. The string returned by this method is not a JNDI composite name and should not be passed directly to context methods. In naming systems for which the notion of full name does not make sense, OperationNotSupportedException is thrown.

  Specified by:
    `getNameInNamespace` in interface `javax.naming.Context`
  Specified by:
    `getNameInNamespace` in class `BaseDirContext`
  Returns:
    this context's name in its own namespace; never null
  Throws:
    `javax.naming.OperationNotSupportedException` - if the naming system does not have the notion of a full name
    `javax.naming.NamingException` - if a naming exception is encountered

### getAttributes

    public javax.naming.directory.Attributes getAttributes(java.lang.String name,
                                                           java.lang.String[] attrIds)
                                                    throws javax.naming.NamingException

  Retrieves selected attributes associated with a named object. See the class description regarding attribute models, attribute type names, and operational attributes.

  Specified by:
    `getAttributes` in interface `javax.naming.directory.DirContext`
  Specified by:
    `getAttributes` in class `BaseDirContext`
  Parameters:
    `name` - the name of the object from which to retrieve attributes
    `attrIds` - the identifiers of the attributes to retrieve. null indicates that all attributes should be retrieved; an empty array indicates that none should be retrieved
  Returns:
    the requested attributes; never null
  Throws:
    `javax.naming.NamingException` - if a naming exception is encountered

### modifyAttributes

    public void modifyAttributes(java.lang.String name,
                                 int mod_op,
                                 javax.naming.directory.Attributes attrs)
                          throws javax.naming.NamingException

  Modifies the attributes associated with a named object. The order of the modifications is not specified. Where possible, the modifications are performed atomically.

  Specified by:
    `modifyAttributes` in interface `javax.naming.directory.DirContext`
  Specified by:
    `modifyAttributes` in class `BaseDirContext`
  Parameters:
    `name` - the name of the object whose attributes will be updated
    `mod_op` - the modification operation, one of: ADD_ATTRIBUTE, REPLACE_ATTRIBUTE, REMOVE_ATTRIBUTE
    `attrs` - the attributes to be used for the modification; may not be null
  Throws:
    `AttributeModificationException` - if the modification cannot be completed successfully
    `javax.naming.NamingException` - if a naming exception is encountered

### modifyAttributes

    public void modifyAttributes(java.lang.String name,
                                 javax.naming.directory.ModificationItem[] mods)
                          throws javax.naming.NamingException

  Modifies the attributes associated with a named object using an an ordered list of modifications. The modifications are performed in the order specified. Each modification specifies a modification operation code and an attribute on which to operate. Where possible, the modifications are performed atomically.

  Specified by:
    `modifyAttributes` in interface `javax.naming.directory.DirContext`
  Specified by:
    `modifyAttributes` in class `BaseDirContext`
  Parameters:
    `name` - the name of the object whose attributes will be updated
    `mods` - an ordered sequence of modifications to be performed; may not be null
  Throws:
    `AttributeModificationException` - if the modification cannot be completed successfully
    `javax.naming.NamingException` - if a naming exception is encountered

### bind

    public void bind(java.lang.String name,
                     java.lang.Object obj,
                     javax.naming.directory.Attributes attrs)
              throws javax.naming.NamingException

  Binds a name to an object, along with associated attributes. If attrs is null, the resulting binding will have the attributes associated with obj if obj is a DirContext, and no attributes otherwise. If attrs is non-null, the resulting binding will have attrs as its attributes; any attributes associated with obj are ignored.

  Specified by:
    `bind` in interface `javax.naming.directory.DirContext`
  Specified by:
    `bind` in class `BaseDirContext`
  Parameters:
    `name` - the name to bind; may not be empty
    `obj` - the object to bind; possibly null
    `attrs` - the attributes to associate with the binding
  Throws:
    `javax.naming.NameAlreadyBoundException` - if name is already bound
    `InvalidAttributesException` - if some "mandatory" attributes of the binding are not supplied
    `javax.naming.NamingException` - if a naming exception is encountered

### rebind

    public void rebind(java.lang.String name,
                       java.lang.Object obj,
                       javax.naming.directory.Attributes attrs)
                throws javax.naming.NamingException

  Binds a name to an object, along with associated attributes, overwriting any existing binding. If attrs is null and obj is a DirContext, the attributes from obj are used. If attrs is null and obj is not a DirContext, any existing attributes associated with the object already bound in the directory remain unchanged. If attrs is non-null, any existing attributes associated with the object already bound in the directory are removed and attrs is associated with the named object. If obj is a DirContext and attrs is non-null, the attributes of obj are ignored.

  Specified by:
    `rebind` in interface `javax.naming.directory.DirContext`
  Specified by:
    `rebind` in class `BaseDirContext`
  Parameters:
    `name` - the name to bind; may not be empty
    `obj` - the object to bind; possibly null
    `attrs` - the attributes to associate with the binding
  Throws:
    `InvalidAttributesException` - if some "mandatory" attributes of the binding are not supplied
    `javax.naming.NamingException` - if a naming exception is encountered

### createSubcontext

    public javax.naming.directory.DirContext createSubcontext(java.lang.String name,
                                                              javax.naming.directory.Attributes attrs)
                                                       throws javax.naming.NamingException

  Creates and binds a new context, along with associated attributes. This method creates a new subcontext with the given name, binds it in the target context (that named by all but terminal atomic component of the name), and associates the supplied attributes with the newly created object. All intermediate and target contexts must already exist. If attrs is null, this method is equivalent to Context.createSubcontext().

  Specified by:
    `createSubcontext` in interface `javax.naming.directory.DirContext`
  Specified by:
    `createSubcontext` in class `BaseDirContext`
  Parameters:
    `name` - the name of the context to create; may not be empty
    `attrs` - the attributes to associate with the newly created context
  Returns:
    the newly created context
  Throws:
    `javax.naming.NameAlreadyBoundException` - if the name is already bound
    `InvalidAttributesException` - if attrs does not contain all the mandatory attributes required for creation
    `javax.naming.NamingException` - if a naming exception is encountered

### getSchema

    public javax.naming.directory.DirContext getSchema(java.lang.String name)
                                                throws javax.naming.NamingException

  Retrieves the schema associated with the named object. The schema describes rules regarding the structure of the namespace and the attributes stored within it. The schema specifies what types of objects can be added to the directory and where they can be added; what mandatory and optional attributes an object can have. The range of support for schemas is directory-specific.

  Specified by:
    `getSchema` in interface `javax.naming.directory.DirContext`
  Specified by:
    `getSchema` in class `BaseDirContext`
  Parameters:
    `name` - the name of the object whose schema is to be retrieved
  Returns:
    the schema associated with the context; never null
  Throws:
    `javax.naming.OperationNotSupportedException` - if schema not supported
    `javax.naming.NamingException` - if a naming exception is encountered

### getSchemaClassDefinition

    public javax.naming.directory.DirContext getSchemaClassDefinition(java.lang.String name)
                                                               throws javax.naming.NamingException

  Retrieves a context containing the schema objects of the named object's class definitions.

  Specified by:
    `getSchemaClassDefinition` in interface `javax.naming.directory.DirContext`
  Specified by:
    `getSchemaClassDefinition` in class `BaseDirContext`
  Parameters:
    `name` - the name of the object whose object class definition is to be retrieved
  Returns:
    the DirContext containing the named object's class definitions; never null
  Throws:
    `javax.naming.OperationNotSupportedException` - if schema not supported
    `javax.naming.NamingException` - if a naming exception is encountered

### search

    public javax.naming.NamingEnumeration search(java.lang.String name,
                                                 javax.naming.directory.Attributes matchingAttributes,
                                                 java.lang.String[] attributesToReturn)
                                          throws javax.naming.NamingException

  Searches in a single context for objects that contain a specified set of attributes, and retrieves selected attributes. The search is performed using the default SearchControls settings.

  Specified by:
    `search` in interface `javax.naming.directory.DirContext`
  Specified by:
    `search` in class `BaseDirContext`
  Parameters:
    `name` - the name of the context to search
    `matchingAttributes` - the attributes to search for. If empty or null, all objects in the target context are returned.
    `attributesToReturn` - the attributes to return. null indicates that all attributes are to be returned; an empty array indicates that none are to be returned.
  Returns:
    a non-null enumeration of SearchResult objects. Each SearchResult contains the attributes identified by attributesToReturn and the name of the corresponding object, named relative to the context named by name.
  Throws:
    `javax.naming.NamingException` - if a naming exception is encountered

### search

    public javax.naming.NamingEnumeration search(java.lang.String name,
                                                 javax.naming.directory.Attributes matchingAttributes)
                                          throws javax.naming.NamingException

  Searches in a single context for objects that contain a specified set of attributes. This method returns all the attributes of such objects. It is equivalent to supplying null as the atributesToReturn parameter to the method search(Name, Attributes, String[]).

  Specified by:
    `search` in interface `javax.naming.directory.DirContext`
  Specified by:
    `search` in class `BaseDirContext`
  Parameters:
    `name` - the name of the context to search
    `matchingAttributes` - the attributes to search for. If empty or null, all objects in the target context are returned.
  Returns:
    a non-null enumeration of SearchResult objects. Each SearchResult contains the attributes identified by attributesToReturn and the name of the corresponding object, named relative to the context named by name.
  Throws:
    `javax.naming.NamingException` - if a naming exception is encountered

### search

    public javax.naming.NamingEnumeration search(java.lang.String name,
                                                 java.lang.String filter,
                                                 javax.naming.directory.SearchControls cons)
                                          throws javax.naming.NamingException

  Searches in the named context or object for entries that satisfy the given search filter. Performs the search as specified by the search controls.

  Specified by:
    `search` in interface `javax.naming.directory.DirContext`
  Specified by:
    `search` in class `BaseDirContext`
  Parameters:
    `name` - the name of the context or object to search
    `filter` - the filter expression to use for the search; may not be null
    `cons` - the search controls that control the search. If null, the default search controls are used (equivalent to (new SearchControls())).
  Returns:
    an enumeration of SearchResults of the objects that satisfy the filter; never null
  Throws:
    `InvalidSearchFilterException` - if the search filter specified is not supported or understood by the underlying directory
    `InvalidSearchControlsException` - if the search controls contain invalid settings
    `javax.naming.NamingException` - if a naming exception is encountered

### search

    public javax.naming.NamingEnumeration search(java.lang.String name,
                                                 java.lang.String filterExpr,
                                                 java.lang.Object[] filterArgs,
                                                 javax.naming.directory.SearchControls cons)
                                          throws javax.naming.NamingException

  Searches in the named context or object for entries that satisfy the given search filter. Performs the search as specified by the search controls.

  Specified by:
    `search` in interface `javax.naming.directory.DirContext`
  Specified by:
    `search` in class `BaseDirContext`
  Parameters:
    `name` - the name of the context or object to search
    `filterExpr` - the filter expression to use for the search. The expression may contain variables of the form "{i}" where i is a nonnegative integer. May not be null.
    `filterArgs` - the array of arguments to substitute for the variables in filterExpr. The value of filterArgs[i] will replace each occurrence of "{i}". If null, equivalent to an empty array.
    `cons` - the search controls that control the search. If null, the default search controls are used (equivalent to (new SearchControls())).
  Returns:
    an enumeration of SearchResults of the objects that satisy the filter; never null
  Throws:
    `java.lang.ArrayIndexOutOfBoundsException` - if filterExpr contains {i} expressions where i is outside the bounds of the array filterArgs
    `InvalidSearchControlsException` - if cons contains invalid settings
    `InvalidSearchFilterException` - if filterExpr with filterArgs represents an invalid search filter
    `javax.naming.NamingException` - if a naming exception is encountered

### normalize

    protected java.lang.String normalize(java.lang.String path)

  Return a context-relative path, beginning with a "/", that represents the canonical version of the specified path after ".." and "." elements are resolved out. If the specified path attempts to go outside the boundaries of the current context (i.e. too many ".." path elements are present), return `null` instead.

  Parameters:
    `path` - Path to be normalized

### file

    protected java.io.File file(java.lang.String name)

  Return a File object representing the specified normalized context-relative path if it exists and is readable. Otherwise, return `null`.

  Parameters:
    `name` - Normalized context-relative path (with leading '/')

### list

    protected java.util.Vector list(java.io.File file)

  List the resources which are members of a collection.

  Parameters:
    `file` - Collection
  Returns:
    Vector containg NamingEntry objects

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