org.apache.naming.resources
Class FileDirContext

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

All Implemented Interfaces:

Context, DirContext

Direct Known Subclasses:

VirtualDirContext

public class FileDirContext
extends BaseDirContext

Filesystem Directory Context implementation helper class.

Version:

$Id: FileDirContext.java 1239053 2012-02-01 10:52:00Z markt $

Author:

Remy Maucherat

Nested Class Summary

protected static class	FileDirContext.FileResource This specialized resource implementation avoids opening the InputStream to the file right away (which would put a lock on the file).
protected static 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 String	absoluteBase Absolute normalized filename of the base.
protected boolean	allowLinking Allow linking.
protected File	base The document base directory.
protected static int	BUFFER_SIZE The descriptive information string for this implementation.

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

aliases, altDirContexts, cached, cacheMaxSize, cacheObjectMaxSize, cacheTTL, 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(Hashtable<String,Object> env)
Builds a file directory context using the given environment.

Method Summary

void	bind(String name, Object obj, Attributes attrs) Binds a name to an object, along with associated attributes.
DirContext	createSubcontext(String name, Attributes attrs) Creates and binds a new context, along with associated attributes.
void	destroySubcontext(String name) Destroys the named context and removes it from the namespace.
protected Attributes	doGetAttributes(String name, String[] attrIds) Retrieves selected attributes associated with a named object.
protected String	doGetRealPath(String path) Return the real path for a given virtual path, if possible; otherwise return null.
protected List<NamingEntry>	doListBindings(String name) Enumerates the names bound in the named context, along with the objects bound to them.
protected Object	doLookup(String name) Retrieves the named object.
protected File	file(String name) Return a File object representing the specified normalized context-relative path if it exists and is readable.
boolean	getAllowLinking() Is linking allowed.
String	getNameInNamespace() Retrieves the full name of this context within its own namespace.
DirContext	getSchema(String name) Retrieves the schema associated with the named object.
DirContext	getSchemaClassDefinition(String name) Retrieves a context containing the schema objects of the named object's class definitions.
protected List<NamingEntry>	list(File file) List the resources which are members of a collection.
NamingEnumeration<NameClassPair>	list(String name) Enumerates the names bound in the named context, along with the class names of objects bound to them.
Object	lookupLink(String name) Retrieves the named object, following links except for the terminal atomic component of the name.
void	modifyAttributes(String name, int mod_op, Attributes attrs) Modifies the attributes associated with a named object.
void	modifyAttributes(String name, ModificationItem[] mods) Modifies the attributes associated with a named object using an an ordered list of modifications.
protected String	normalize(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(String name, Object obj, 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(String oldName, String newName) Binds a new name to the object bound to an old name, and unbinds the old name.
NamingEnumeration<SearchResult>	search(String name, Attributes matchingAttributes) Searches in a single context for objects that contain a specified set of attributes.
NamingEnumeration<SearchResult>	search(String name, Attributes matchingAttributes, String[] attributesToReturn) Searches in a single context for objects that contain a specified set of attributes, and retrieves selected attributes.
NamingEnumeration<SearchResult>	search(String name, String filterExpr, Object[] filterArgs, SearchControls cons) Searches in the named context or object for entries that satisfy the given search filter.
NamingEnumeration<SearchResult>	search(String name, String filter, 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	setDocBase(String docBase) Set the document root.
void	unbind(String name) Unbinds the named object.

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

addAlias, addAltDirContext, addResourcesJar, addToEnvironment, allocate, bind, bind, bind, close, composeName, composeName, createSubcontext, createSubcontext, createSubcontext, destroySubcontext, getAliases, getAttributes, getAttributes, getAttributes, getAttributes, getCacheMaxSize, getCacheObjectMaxSize, getCacheTTL, getDocBase, getEnvironment, getNameParser, getNameParser, getRealPath, getSchema, getSchemaClassDefinition, isCached, list, listBindings, listBindings, lookup, lookup, lookupLink, modifyAttributes, modifyAttributes, rebind, rebind, rebind, removeAlias, removeFromEnvironment, rename, search, search, search, search, setAliases, setCached, setCacheMaxSize, setCacheObjectMaxSize, setCacheTTL, 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 File base

The document base directory.

absoluteBase

protected String absoluteBase

Absolute normalized filename of the base.

allowLinking

protected boolean allowLinking

Allow linking.

Constructor Detail

FileDirContext

public FileDirContext()

Builds a file directory context using the given environment.

FileDirContext

public FileDirContext(Hashtable<String,Object> env)

Builds a file directory context using the given environment.

Method Detail

setDocBase

public void setDocBase(String docBase)

Set the document root.

Overrides:

setDocBase in class BaseDirContext

Parameters:

docBase - The new document root

Throws:

IllegalArgumentException - if the specified value is not supported by this implementation

IllegalArgumentException - if this would create a malformed URL

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

doGetRealPath

protected String doGetRealPath(String path)

Return the real path for a given virtual path, if possible; otherwise return null.

Specified by:

doGetRealPath in class BaseDirContext

Parameters:

path - The path to the desired resource

doLookup

protected Object doLookup(String name)

Retrieves the named object.

Specified by:

doLookup in class BaseDirContext

Parameters:

name - the name of the object to look up

Returns:

the object bound to name

unbind

public void unbind(String name)
            throws 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 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

NamingException - if a naming exception is encountered

rename

public void rename(String oldName,
                   String newName)
            throws 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 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:

NameAlreadyBoundException - if newName is already bound

NamingException - if a naming exception is encountered

list

public NamingEnumeration<NameClassPair> list(String name)
                                      throws 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 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:

NamingException - if a naming exception is encountered

doListBindings

protected List<NamingEntry> doListBindings(String name)
                                    throws 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:

doListBindings 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:

NamingException - if a naming exception is encountered

destroySubcontext

public void destroySubcontext(String name)
                       throws 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 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

NamingException

lookupLink

public Object lookupLink(String name)
                  throws 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 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:

NamingException - if a naming exception is encountered

getNameInNamespace

public String getNameInNamespace()
                          throws 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 Context

Specified by:

getNameInNamespace in class BaseDirContext

Returns:

this context's name in its own namespace; never null

Throws:

OperationNotSupportedException - if the naming system does not have the notion of a full name

NamingException - if a naming exception is encountered

doGetAttributes

protected Attributes doGetAttributes(String name,
                                     String[] attrIds)
                              throws NamingException

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

Specified by:

doGetAttributes 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:

NamingException - if a naming exception is encountered

modifyAttributes

public void modifyAttributes(String name,
                             int mod_op,
                             Attributes attrs)
                      throws 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 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

NamingException - if a naming exception is encountered

modifyAttributes

public void modifyAttributes(String name,
                             ModificationItem[] mods)
                      throws 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 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

NamingException - if a naming exception is encountered

bind

public void bind(String name,
                 Object obj,
                 Attributes attrs)
          throws 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 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:

NameAlreadyBoundException - if name is already bound

InvalidAttributesException - if some "mandatory" attributes of the binding are not supplied

NamingException - if a naming exception is encountered

rebind

public void rebind(String name,
                   Object obj,
                   Attributes attrs)
            throws 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 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

NamingException - if a naming exception is encountered

createSubcontext

public DirContext createSubcontext(String name,
                                   Attributes attrs)
                            throws 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 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:

NameAlreadyBoundException - if the name is already bound

InvalidAttributesException - if attrs does not contain all the mandatory attributes required for creation

NamingException - if a naming exception is encountered

getSchema

public DirContext getSchema(String name)
                     throws 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 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:

OperationNotSupportedException - if schema not supported

NamingException - if a naming exception is encountered

getSchemaClassDefinition

public DirContext getSchemaClassDefinition(String name)
                                    throws NamingException

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

Specified by:

getSchemaClassDefinition in interface 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:

OperationNotSupportedException - if schema not supported

NamingException - if a naming exception is encountered

search

public NamingEnumeration<SearchResult> search(String name,
                                              Attributes matchingAttributes,
                                              String[] attributesToReturn)
                                       throws 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 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:

NamingException - if a naming exception is encountered

search

public NamingEnumeration<SearchResult> search(String name,
                                              Attributes matchingAttributes)
                                       throws 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 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:

NamingException - if a naming exception is encountered

search

public NamingEnumeration<SearchResult> search(String name,
                                              String filter,
                                              SearchControls cons)
                                       throws 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 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

NamingException - if a naming exception is encountered

search

public NamingEnumeration<SearchResult> search(String name,
                                              String filterExpr,
                                              Object[] filterArgs,
                                              SearchControls cons)
                                       throws 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 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 satisfy the filter; never null

Throws:

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

NamingException - if a naming exception is encountered

normalize

protected String normalize(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 File file(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 List<NamingEntry> list(File file)

List the resources which are members of a collection.

Parameters:

file - Collection

Returns:

Vector containing NamingEntry objects