/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.naming.resources;
import java.io.File;
import java.io.IOException;
import java.net.JarURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.jar.JarFile;
import java.util.zip.ZipEntry;
import javax.naming.Binding;
import javax.naming.Context;
import javax.naming.Name;
import javax.naming.NameClassPair;
import javax.naming.NameNotFoundException;
import javax.naming.NameParser;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.Attributes;
import javax.naming.directory.DirContext;
import javax.naming.directory.ModificationItem;
import javax.naming.directory.SearchControls;
import javax.naming.directory.SearchResult;
import org.apache.naming.NameParserImpl;
import org.apache.naming.NamingContextBindingsEnumeration;
import org.apache.naming.NamingContextEnumeration;
import org.apache.naming.NamingEntry;
import org.apache.naming.StringManager;
/**
* Directory Context implementation helper class.
*
* @author Remy Maucherat
*/
public abstract class BaseDirContext implements DirContext {
private static final org.apache.juli.logging.Log log=
org.apache.juli.logging.LogFactory.getLog( BaseDirContext.class );
// ----------------------------------------------------------- Constructors
/**
* Builds a base directory context.
*/
public BaseDirContext() {
this.env = new Hashtable<String,Object>();
}
/**
* Builds a base directory context using the given environment.
*/
public BaseDirContext(Hashtable<String,Object> env) {
this.env = env;
}
// ----------------------------------------------------- Instance Variables
/**
* The document base path.
*/
protected String docBase = null;
/**
* Environment.
*/
protected Hashtable<String,Object> env;
/**
* The string manager for this package.
*/
protected static final StringManager sm = StringManager.getManager(Constants.Package);
/**
* Name parser for this context.
*/
protected final NameParser nameParser = new NameParserImpl();
/**
* Cached.
*/
protected boolean cached = true;
/**
* Cache TTL.
*/
protected int cacheTTL = 5000; // 5s
/**
* Max size of cache for resources.
*/
protected int cacheMaxSize = 10240; // 10 MB
/**
* Max size of resources that will be content cached.
*/
protected int cacheObjectMaxSize = 512; // 512 K
/**
* Aliases allow content to be included from other locations.
*/
protected Map<String,BaseDirContext> aliases =
new HashMap<String,BaseDirContext>();
/**
* Alternate / backup DirContexts for static resources. These will be
* searched in the order they are added if the requested resource cannot be
* found in the primary DirContext.
*/
protected List<DirContext> altDirContexts = new ArrayList<DirContext>();
// ------------------------------------------------------------- Properties
/**
* Add a resources JAR. The contents of /META-INF/resources/ will be used if
* a requested resource can not be found in the main context.
*/
public void addResourcesJar(URL url) {
try {
JarURLConnection conn = (JarURLConnection) url.openConnection();
JarFile jarFile = conn.getJarFile();
ZipEntry entry = jarFile.getEntry("/");
WARDirContext warDirContext = new WARDirContext(jarFile,
new WARDirContext.Entry("/", entry));
warDirContext.loadEntries();
altDirContexts.add(warDirContext);
} catch (IOException ioe) {
log.warn(sm.getString("resources.addResourcesJarFail", url), ioe);
}
}
/**
* Add an alternative DirContext (must contain META-INF/resources) directly.
*/
public void addAltDirContext(DirContext altDirContext) {
altDirContexts.add(altDirContext);
}
/**
* Add an alias.
*/
public void addAlias(String path, BaseDirContext dirContext) {
if (!path.startsWith("/")) {
throw new IllegalArgumentException(
sm.getString("resources.invalidAliasPath", path));
}
aliases.put(path, dirContext);
}
/**
* Remove an alias.
*/
public void removeAlias(String path) {
if (!path.startsWith("/")) {
throw new IllegalArgumentException(
sm.getString("resources.invalidAliasPath", path));
}
aliases.remove(path);
}
/**
* Get the current alias configuration in String form. If no aliases are
* configured, an empty string will be returned.
*/
public String getAliases() {
StringBuilder result = new StringBuilder();
Iterator<Entry<String,BaseDirContext>> iter =
aliases.entrySet().iterator();
boolean first = true;
while (iter.hasNext()) {
if (first) {
first = false;
} else {
result.append(',');
}
Entry<String,BaseDirContext> entry = iter.next();
result.append(entry.getKey());
result.append('=');
result.append(entry.getValue().getDocBase());
}
return result.toString();
}
/**
* Set the current alias configuration from a String. The String should be
* of the form "/aliasPath1=docBase1,/aliasPath2=docBase2" where aliasPathN
* must include a leading '/' and docBaseN must be an absolute path to
* either a .war file or a directory. Any call to this method will replace
* the current set of aliases.
*/
public void setAliases(String theAliases) {
// Overwrite whatever is currently set
aliases.clear();
if (theAliases == null || theAliases.length() == 0)
return;
String[] kvps = theAliases.split(",");
for (String kvp : kvps) {
// Skip blanks introduced by regexp split and/or poor input
kvp = kvp.trim();
if(0 == kvp.length())
continue;
String[] kv = kvp.split("=");
if (kv.length != 2)
throw new IllegalArgumentException(
sm.getString("resources.invalidAliasMapping", kvp));
// Trim whitespace from key and value
kv[0] = kv[0].trim();
kv[1] = kv[1].trim();
if(kv[0].length() == 0 || kv[1].length() == 0)
throw new IllegalArgumentException(
sm.getString("resources.invalidAliasMapping", kvp));
if (kv[0].equals("/")) {
throw new IllegalArgumentException(
sm.getString("resources.invalidAliasNotAllowed", kv[0]));
}
File aliasLoc = new File(kv[1]);
if (!aliasLoc.exists()) {
throw new IllegalArgumentException(
sm.getString("resources.invalidAliasNotExist", kv[1]));
}
BaseDirContext context;
if (kv[1].endsWith(".war") && !(aliasLoc.isDirectory())) {
context = new WARDirContext();
} else if (aliasLoc.isDirectory()) {
context = new FileDirContext();
} else {
throw new IllegalArgumentException(
sm.getString("resources.invalidAliasFile", kv[1]));
}
context.setDocBase(kv[1]);
addAlias(kv[0], context);
}
}
/**
* Return the document root for this component.
*/
public String getDocBase() {
return (this.docBase);
}
/**
* Set the document root for this component.
*
* @param docBase The new document root
*
* @exception IllegalArgumentException if the specified value is not
* supported by this implementation
* @exception IllegalArgumentException if this would create a
* malformed URL
*/
public void setDocBase(String docBase) {
// Validate the format of the proposed document root
if (docBase == null)
throw new IllegalArgumentException
(sm.getString("resources.null"));
// Change the document root property
this.docBase = docBase;
}
/**
* Set cached.
*/
public void setCached(boolean cached) {
this.cached = cached;
}
/**
* Is cached ?
*/
public boolean isCached() {
return cached;
}
/**
* Set cache TTL.
*/
public void setCacheTTL(int cacheTTL) {
this.cacheTTL = cacheTTL;
}
/**
* Get cache TTL.
*/
public int getCacheTTL() {
return cacheTTL;
}
/**
* Return the maximum size of the cache in KB.
*/
public int getCacheMaxSize() {
return cacheMaxSize;
}
/**
* Set the maximum size of the cache in KB.
*/
public void setCacheMaxSize(int cacheMaxSize) {
this.cacheMaxSize = cacheMaxSize;
}
/**
* Return the maximum size of objects to be cached in KB.
*/
public int getCacheObjectMaxSize() {
return cacheObjectMaxSize;
}
/**
* Set the maximum size of objects to be placed the cache in KB.
*/
public void setCacheObjectMaxSize(int cacheObjectMaxSize) {
this.cacheObjectMaxSize = cacheObjectMaxSize;
}
// --------------------------------------------------------- Public Methods
/**
* Allocate resources for this directory context.
*/
public void allocate() {
// No action taken by the default implementation
}
/**
* Release any resources allocated for this directory context.
*/
public void release() {
for(BaseDirContext bcontext: this.aliases.values()) {
bcontext.release();
}
this.aliases.clear();
for(DirContext dcontext: this.altDirContexts) {
if(dcontext instanceof BaseDirContext) {
((BaseDirContext)dcontext).release();
}
}
this.altDirContexts.clear();
}
/**
* Return the real path for a given virtual path, if possible; otherwise
* return <code>null</code>.
*
* @param name The path to the desired resource
*/
public String getRealPath(String name) {
if (!aliases.isEmpty()) {
AliasResult result = findAlias(name);
if (result.dirContext != null) {
return result.dirContext.doGetRealPath(result.aliasName);
}
}
// Next do a standard getRealPath()
String path = doGetRealPath(name);
if (path != null)
return path;
String resourceName = "/META-INF/resources" + name;
// Check the alternate locations
for (DirContext altDirContext : altDirContexts) {
if (altDirContext instanceof BaseDirContext){
path = ((BaseDirContext) altDirContext).getRealPath(resourceName);
if (path != null)
return path;
}
}
// Really not found
return null;
}
// -------------------------------------------------------- Context Methods
/**
* Retrieves the named object. If name is empty, returns a new instance
* of this context (which represents the same naming context as this
* context, but its environment may be modified independently and it may
* be accessed concurrently).
*
* @param name the name of the object to look up
* @return the object bound to name
* @exception NamingException if a naming exception is encountered
*/
@Override
public final Object lookup(Name name)
throws NamingException {
return lookup(name.toString());
}
/**
* Retrieves the named object.
*
* @param name
* the name of the object to look up
* @return the object bound to name
* @exception NamingException
* if a naming exception is encountered
*/
@Override
public final Object lookup(String name) throws NamingException {
// First check for aliases
Object obj = doLookupWithoutNNFE(name);
if (obj != null) {
return obj;
}
// Really not found
throw new NameNotFoundException(
sm.getString("resources.notFound", name));
}
private Object doLookupWithoutNNFE(String name) throws NamingException {
if (!aliases.isEmpty()) {
AliasResult result = findAlias(name);
if (result.dirContext != null) {
return result.dirContext.lookup(result.aliasName);
}
}
// Next do a standard lookup
Object obj = doLookup(name);
if (obj != null) {
return obj;
}
// Class files may not be loaded from the alternate locations so don't
// waste cycles looking.
if (name.endsWith(".class")) {
return null;
}
// Check the alternate locations (Resource JARs)
String resourceName = "/META-INF/resources" + name;
for (DirContext altDirContext : altDirContexts) {
if (altDirContext instanceof BaseDirContext) {
obj = ((BaseDirContext) altDirContext)
.doLookupWithoutNNFE(resourceName);
} else {
try {
obj = altDirContext.lookup(resourceName);
} catch (NamingException ex) {
// ignore
}
}
if (obj != null) {
return obj;
}
}
// Return null instead
return null;
}
/**
* Binds a name to an object. All intermediate contexts and the target
* context (that named by all but terminal atomic component of the name)
* must already exist.
*
* @param name the name to bind; may not be empty
* @param obj the object to bind; possibly null
* @exception javax.naming.NameAlreadyBoundException if name is already
* bound
* @exception javax.naming.directory.InvalidAttributesException if object
* did not supply all mandatory attributes
* @exception NamingException if a naming exception is encountered
*/
@Override
public void bind(Name name, Object obj)
throws NamingException {
bind(name.toString(), obj);
}
/**
* Binds a name to an object.
*
* @param name the name to bind; may not be empty
* @param obj the object to bind; possibly null
* @exception javax.naming.NameAlreadyBoundException if name is already
* bound
* @exception javax.naming.directory.InvalidAttributesException if object
* did not supply all mandatory attributes
* @exception NamingException if a naming exception is encountered
*/
@Override
public void bind(String name, Object obj)
throws NamingException {
bind(name, obj, null);
}
/**
* Binds a name to an object, overwriting any existing binding. All
* intermediate contexts and the target context (that named by all but
* terminal atomic component of the name) must already exist.
* <p>
* If the object is a DirContext, any existing attributes associated with
* the name are replaced with those of the object. Otherwise, any
* existing attributes associated with the name remain unchanged.
*
* @param name the name to bind; may not be empty
* @param obj the object to bind; possibly null
* @exception javax.naming.directory.InvalidAttributesException if object
* did not supply all mandatory attributes
* @exception NamingException if a naming exception is encountered
*/
@Override
public void rebind(Name name, Object obj)
throws NamingException {
rebind(name.toString(), obj);
}
/**
* Binds a name to an object, overwriting any existing binding.
*
* @param name the name to bind; may not be empty
* @param obj the object to bind; possibly null
* @exception javax.naming.directory.InvalidAttributesException if object
* did not supply all mandatory attributes
* @exception NamingException if a naming exception is encountered
*/
@Override
public void rebind(String name, Object obj)
throws NamingException {
rebind(name, obj, null);
}
/**
* 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.
* <p>
* 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.
*
* @param name the name to bind; may not be empty
* @exception NameNotFoundException if an intermediate context does not
* exist
* @exception NamingException if a naming exception is encountered
*/
@Override
public void unbind(Name name)
throws NamingException {
unbind(name.toString());
}
/**
* Unbinds the named object.
*
* @param name the name to bind; may not be empty
* @exception NameNotFoundException if an intermediate context does not
* exist
* @exception NamingException if a naming exception is encountered
*/
@Override
public abstract void unbind(String name)
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.
*
* @param oldName the name of the existing binding; may not be empty
* @param newName the name of the new binding; may not be empty
* @exception javax.naming.NameAlreadyBoundException if newName is already
* bound
* @exception NamingException if a naming exception is encountered
*/
@Override
public void rename(Name oldName, Name newName)
throws NamingException {
rename(oldName.toString(), newName.toString());
}
/**
* Binds a new name to the object bound to an old name, and unbinds the
* old name.
*
* @param oldName the name of the existing binding; may not be empty
* @param newName the name of the new binding; may not be empty
* @exception javax.naming.NameAlreadyBoundException if newName is already
* bound
* @exception NamingException if a naming exception is encountered
*/
@Override
public abstract void rename(String oldName, String newName)
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.
* <p>
* If a binding is added to or removed from this context, its effect on
* an enumeration previously returned is undefined.
*
* @param name the name of the context to list
* @return an enumeration of the names and class names of the bindings in
* this context. Each element of the enumeration is of type NameClassPair.
* @exception NamingException if a naming exception is encountered
*/
@Override
public NamingEnumeration<NameClassPair> list(Name name)
throws NamingException {
return list(name.toString());
}
/**
* Enumerates the names bound in the named context, along with the class
* names of objects bound to them.
*
* @param name the name of the context to list
* @return an enumeration of the names and class names of the bindings in
* this context. Each element of the enumeration is of type NameClassPair.
* @exception NamingException if a naming exception is encountered
*/
@Override
public NamingEnumeration<NameClassPair> list(String name)
throws NamingException {
if (!aliases.isEmpty()) {
AliasResult result = findAlias(name);
if (result.dirContext != null) {
return result.dirContext.list(result.aliasName);
}
}
// Next do a standard lookup
List<NamingEntry> bindings = doListBindings(name);
// Check the alternate locations
List<NamingEntry> altBindings = null;
String resourceName = "/META-INF/resources" + name;
for (DirContext altDirContext : altDirContexts) {
if (altDirContext instanceof BaseDirContext) {
altBindings = ((BaseDirContext) altDirContext).doListBindings(resourceName);
}
if (altBindings != null) {
if (bindings == null) {
bindings = altBindings;
} else {
bindings.addAll(altBindings);
}
}
}
if (bindings != null) {
return new NamingContextEnumeration(bindings.iterator());
}
// Really not found
throw new NameNotFoundException(
sm.getString("resources.notFound", name));
}
/**
* Enumerates the names bound in the named context, along with the
* objects bound to them. The contents of any subcontexts are not
* included.
* <p>
* If a binding is added to or removed from this context, its effect on
* an enumeration previously returned is undefined.
*
* @param name the name of the context to list
* @return an enumeration of the bindings in this context.
* Each element of the enumeration is of type Binding.
* @exception NamingException if a naming exception is encountered
*/
@Override
public final NamingEnumeration<Binding> listBindings(Name name)
throws NamingException {
return listBindings(name.toString());
}
/**
* Enumerates the names bound in the named context, along with the
* objects bound to them.
*
* @param name the name of the context to list
* @return an enumeration of the bindings in this context.
* Each element of the enumeration is of type Binding.
* @exception NamingException if a naming exception is encountered
*/
@Override
public final NamingEnumeration<Binding> listBindings(String name)
throws NamingException {
if (!aliases.isEmpty()) {
AliasResult result = findAlias(name);
if (result.dirContext != null) {
return result.dirContext.listBindings(result.aliasName);
}
}
// Next do a standard lookup
List<NamingEntry> bindings = doListBindings(name);
// Check the alternate locations
List<NamingEntry> altBindings = null;
String resourceName = "/META-INF/resources" + name;
for (DirContext altDirContext : altDirContexts) {
if (altDirContext instanceof BaseDirContext) {
altBindings = ((BaseDirContext) altDirContext).doListBindings(resourceName);
}
if (altBindings != null) {
if (bindings == null) {
bindings = altBindings;
} else {
bindings.addAll(altBindings);
}
}
}
if (bindings != null) {
return new NamingContextBindingsEnumeration(bindings.iterator(),
this);
}
// Really not found
throw new NameNotFoundException(
sm.getString("resources.notFound", name));
}
/**
* Destroys the named context and removes it from the namespace. Any
* attributes associated with the name are also removed. Intermediate
* contexts are not destroyed.
* <p>
* 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.
*
* @param name the name of the context to be destroyed; may not be empty
* @exception NameNotFoundException if an intermediate context does not
* exist
* @exception javax.naming.NotContextException if the name is bound but does
* not name a context, or does not name a context of the appropriate type
*/
@Override
public void destroySubcontext(Name name)
throws NamingException {
destroySubcontext(name.toString());
}
/**
* Destroys the named context and removes it from the namespace.
*
* @param name the name of the context to be destroyed; may not be empty
* @exception NameNotFoundException if an intermediate context does not
* exist
* @exception javax.naming.NotContextException if the name is bound but does
* not name a context, or does not name a context of the appropriate type
*/
@Override
public abstract void destroySubcontext(String name)
throws NamingException;
/**
* Creates and binds a new context. Creates a new context with the given
* name and binds it in the target context (that named by all but
* terminal atomic component of the name). All intermediate contexts and
* the target context must already exist.
*
* @param name the name of the context to create; may not be empty
* @return the newly created context
* @exception javax.naming.NameAlreadyBoundException if name is already
* bound
* @exception javax.naming.directory.InvalidAttributesException if creation
* of the sub-context requires specification of mandatory attributes
* @exception NamingException if a naming exception is encountered
*/
@Override
public Context createSubcontext(Name name)
throws NamingException {
return createSubcontext(name.toString());
}
/**
* Creates and binds a new context.
*
* @param name the name of the context to create; may not be empty
* @return the newly created context
* @exception javax.naming.NameAlreadyBoundException if name is already
* bound
* @exception javax.naming.directory.InvalidAttributesException if creation
* of the sub-context requires specification of mandatory attributes
* @exception NamingException if a naming exception is encountered
*/
@Override
public Context createSubcontext(String name)
throws NamingException {
return createSubcontext(name, null);
}
/**
* 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.
*
* @param name the name of the object to look up
* @return the object bound to name, not following the terminal link
* (if any).
* @exception NamingException if a naming exception is encountered
*/
@Override
public Object lookupLink(Name name)
throws NamingException {
return lookupLink(name.toString());
}
/**
* Retrieves the named object, following links except for the terminal
* atomic component of the name.
*
* @param name the name of the object to look up
* @return the object bound to name, not following the terminal link
* (if any).
* @exception NamingException if a naming exception is encountered
*/
@Override
public abstract Object lookupLink(String name)
throws NamingException;
/**
* Retrieves the parser associated with the named context. In a
* federation of namespaces, different naming systems will parse names
* differently. This method allows an application to get a parser for
* parsing names into their atomic components using the naming convention
* of a particular naming system. Within any single naming system,
* NameParser objects returned by this method must be equal (using the
* equals() test).
*
* @param name the name of the context from which to get the parser
* @return a name parser that can parse compound names into their atomic
* components
* @exception NamingException if a naming exception is encountered
*/
@Override
public NameParser getNameParser(Name name)
throws NamingException {
return new NameParserImpl();
}
/**
* Retrieves the parser associated with the named context.
*
* @param name the name of the context from which to get the parser
* @return a name parser that can parse compound names into their atomic
* components
* @exception NamingException if a naming exception is encountered
*/
@Override
public NameParser getNameParser(String name)
throws NamingException {
return new NameParserImpl();
}
/**
* Composes the name of this context with a name relative to this context.
* <p>
* Given a name (name) relative to this context, and the name (prefix)
* of this context relative to one of its ancestors, this method returns
* the composition of the two names using the syntax appropriate for the
* naming system(s) involved. That is, if name names an object relative
* to this context, the result is the name of the same object, but
* relative to the ancestor context. None of the names may be null.
*
* @param name a name relative to this context
* @param prefix the name of this context relative to one of its ancestors
* @return the composition of prefix and name
* @exception NamingException if a naming exception is encountered
*/
@Override
public Name composeName(Name name, Name prefix)
throws NamingException {
Name clone = (Name) prefix.clone();
return clone.addAll(name);
}
/**
* Composes the name of this context with a name relative to this context.
*
* @param name a name relative to this context
* @param prefix the name of this context relative to one of its ancestors
* @return the composition of prefix and name
* @exception NamingException if a naming exception is encountered
*/
@Override
public String composeName(String name, String prefix)
throws NamingException {
return prefix + "/" + name;
}
/**
* Adds a new environment property to the environment of this context. If
* the property already exists, its value is overwritten.
*
* @param propName the name of the environment property to add; may not
* be null
* @param propVal the value of the property to add; may not be null
* @exception NamingException if a naming exception is encountered
*/
@Override
public Object addToEnvironment(String propName, Object propVal)
throws NamingException {
return env.put(propName, propVal);
}
/**
* Removes an environment property from the environment of this context.
*
* @param propName the name of the environment property to remove;
* may not be null
* @exception NamingException if a naming exception is encountered
*/
@Override
public Object removeFromEnvironment(String propName)
throws NamingException {
return env.remove(propName);
}
/**
* Retrieves the environment in effect for this context. See class
* description for more details on environment properties.
* The caller should not make any changes to the object returned: their
* effect on the context is undefined. The environment of this context
* may be changed using addToEnvironment() and removeFromEnvironment().
*
* @return the environment of this context; never null
* @exception NamingException if a naming exception is encountered
*/
@Override
public Hashtable<String,Object> getEnvironment()
throws NamingException {
return env;
}
/**
* Closes this context. This method releases this context's resources
* immediately, instead of waiting for them to be released automatically
* by the garbage collector.
* This method is idempotent: invoking it on a context that has already
* been closed has no effect. Invoking any other method on a closed
* context is not allowed, and results in undefined behaviour.
*
* @exception NamingException if a naming exception is encountered
*/
@Override
public void close()
throws NamingException {
env.clear();
}
/**
* Retrieves the full name of this context within its own namespace.
* <p>
* 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.
*
* @return this context's name in its own namespace; never null
* @exception javax.naming.OperationNotSupportedException if the naming
* system does not have the notion of a full name
* @exception NamingException if a naming exception is encountered
*/
@Override
public abstract String getNameInNamespace()
throws NamingException;
// ----------------------------------------------------- DirContext Methods
/**
* Retrieves all of the attributes associated with a named object.
*
* @return the set of attributes associated with name.
* Returns an empty attribute set if name has no attributes; never null.
* @param name the name of the object from which to retrieve attributes
* @exception NamingException if a naming exception is encountered
*/
@Override
public Attributes getAttributes(Name name)
throws NamingException {
return getAttributes(name.toString());
}
/**
* Retrieves all of the attributes associated with a named object.
*
* @return the set of attributes associated with name
* @param name the name of the object from which to retrieve attributes
* @exception NamingException if a naming exception is encountered
*/
@Override
public Attributes getAttributes(String name)
throws NamingException {
return getAttributes(name, null);
}
/**
* Retrieves selected attributes associated with a named object.
* See the class description regarding attribute models, attribute type
* names, and operational attributes.
*
* @return the requested attributes; never null
* @param name the name of the object from which to retrieve attributes
* @param 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
* @exception NamingException if a naming exception is encountered
*/
@Override
public Attributes getAttributes(Name name, String[] attrIds)
throws NamingException {
return getAttributes(name.toString(), attrIds);
}
/**
* Retrieves selected attributes associated with a named object.
*
* @return the requested attributes; never null
* @param name the name of the object from which to retrieve attributes
* @param 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
* @exception NamingException if a naming exception is encountered
*/
@Override
public final Attributes getAttributes(String name, String[] attrIds)
throws NamingException {
// First check for aliases
if (!aliases.isEmpty()) {
AliasResult result = findAlias(name);
if (result.dirContext != null) {
return result.dirContext.getAttributes(
result.aliasName, attrIds);
}
}
// Next do a standard lookup
Attributes attrs = doGetAttributes(name, attrIds);
if (attrs != null)
return attrs;
String resourceName = "/META-INF/resources" + name;
// Check the alternate locations
for (DirContext altDirContext : altDirContexts) {
if (altDirContext instanceof BaseDirContext)
attrs = ((BaseDirContext) altDirContext).doGetAttributes(resourceName, attrIds);
else {
try {
attrs = altDirContext.getAttributes(name, attrIds);
} catch (NamingException ne) {
// Ignore
}
}
if (attrs != null)
return attrs;
}
// Really not found
throw new NameNotFoundException(
sm.getString("resources.notFound", name));
}
/**
* Modifies the attributes associated with a named object. The order of
* the modifications is not specified. Where possible, the modifications
* are performed atomically.
*
* @param name the name of the object whose attributes will be updated
* @param mod_op the modification operation, one of: ADD_ATTRIBUTE,
* REPLACE_ATTRIBUTE, REMOVE_ATTRIBUTE
* @param attrs the attributes to be used for the modification; may not
* be null
* @exception javax.naming.directory.AttributeModificationException if the
* modification cannot be completed successfully
* @exception NamingException if a naming exception is encountered
*/
@Override
public void modifyAttributes(Name name, int mod_op, Attributes attrs)
throws NamingException {
modifyAttributes(name.toString(), mod_op, attrs);
}
/**
* Modifies the attributes associated with a named object.
*
* @param name the name of the object whose attributes will be updated
* @param mod_op the modification operation, one of: ADD_ATTRIBUTE,
* REPLACE_ATTRIBUTE, REMOVE_ATTRIBUTE
* @param attrs the attributes to be used for the modification; may not
* be null
* @exception javax.naming.directory.AttributeModificationException if the
* modification cannot be completed successfully
* @exception NamingException if a naming exception is encountered
*/
@Override
public abstract void modifyAttributes
(String name, int mod_op, Attributes attrs)
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.
*
* @param name the name of the object whose attributes will be updated
* @param mods an ordered sequence of modifications to be performed; may
* not be null
* @exception javax.naming.directory.AttributeModificationException if the
* modification cannot be completed successfully
* @exception NamingException if a naming exception is encountered
*/
@Override
public void modifyAttributes(Name name, ModificationItem[] mods)
throws NamingException {
modifyAttributes(name.toString(), mods);
}
/**
* Modifies the attributes associated with a named object using an an
* ordered list of modifications.
*
* @param name the name of the object whose attributes will be updated
* @param mods an ordered sequence of modifications to be performed; may
* not be null
* @exception javax.naming.directory.AttributeModificationException if the
* modification cannot be completed successfully
* @exception NamingException if a naming exception is encountered
*/
@Override
public abstract void modifyAttributes(String name, ModificationItem[] mods)
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.
*
* @param name the name to bind; may not be empty
* @param obj the object to bind; possibly null
* @param attrs the attributes to associate with the binding
* @exception javax.naming.NameAlreadyBoundException if name is already
* bound
* @exception javax.naming.directory.InvalidAttributesException if some
* "mandatory" attributes of the binding are not supplied
* @exception NamingException if a naming exception is encountered
*/
@Override
public void bind(Name name, Object obj, Attributes attrs)
throws NamingException {
bind(name.toString(), obj, attrs);
}
/**
* Binds a name to an object, along with associated attributes.
*
* @param name the name to bind; may not be empty
* @param obj the object to bind; possibly null
* @param attrs the attributes to associate with the binding
* @exception javax.naming.NameAlreadyBoundException if name is already
* bound
* @exception javax.naming.directory.InvalidAttributesException if some
* "mandatory" attributes of the binding are not supplied
* @exception NamingException if a naming exception is encountered
*/
@Override
public abstract void bind(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.
*
* @param name the name to bind; may not be empty
* @param obj the object to bind; possibly null
* @param attrs the attributes to associate with the binding
* @exception javax.naming.directory.InvalidAttributesException if some
* "mandatory" attributes of the binding are not supplied
* @exception NamingException if a naming exception is encountered
*/
@Override
public void rebind(Name name, Object obj, Attributes attrs)
throws NamingException {
rebind(name.toString(), obj, attrs);
}
/**
* Binds a name to an object, along with associated attributes,
* overwriting any existing binding.
*
* @param name the name to bind; may not be empty
* @param obj the object to bind; possibly null
* @param attrs the attributes to associate with the binding
* @exception javax.naming.directory.InvalidAttributesException if some
* "mandatory" attributes of the binding are not supplied
* @exception NamingException if a naming exception is encountered
*/
@Override
public abstract void rebind(String name, Object obj, 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().
*
* @param name the name of the context to create; may not be empty
* @param attrs the attributes to associate with the newly created context
* @return the newly created context
* @exception javax.naming.NameAlreadyBoundException if name is already
* bound
* @exception javax.naming.directory.InvalidAttributesException if attrs
* does not contain all the mandatory attributes required for creation
* @exception NamingException if a naming exception is encountered
*/
@Override
public DirContext createSubcontext(Name name, Attributes attrs)
throws NamingException {
return createSubcontext(name.toString(), attrs);
}
/**
* Creates and binds a new context, along with associated attributes.
*
* @param name the name of the context to create; may not be empty
* @param attrs the attributes to associate with the newly created context
* @return the newly created context
* @exception javax.naming.NameAlreadyBoundException if name is already
* bound
* @exception javax.naming.directory.InvalidAttributesException if attrs
* does not contain all the mandatory attributes required for creation
* @exception NamingException if a naming exception is encountered
*/
@Override
public abstract DirContext createSubcontext(String name, Attributes attrs)
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.
*
* @param name the name of the object whose schema is to be retrieved
* @return the schema associated with the context; never null
* @exception javax.naming.OperationNotSupportedException if schema not
* supported
* @exception NamingException if a naming exception is encountered
*/
@Override
public DirContext getSchema(Name name)
throws NamingException {
return getSchema(name.toString());
}
/**
* Retrieves the schema associated with the named object.
*
* @param name the name of the object whose schema is to be retrieved
* @return the schema associated with the context; never null
* @exception javax.naming.OperationNotSupportedException if schema not
* supported
* @exception NamingException if a naming exception is encountered
*/
@Override
public abstract DirContext getSchema(String name)
throws NamingException;
/**
* Retrieves a context containing the schema objects of the named
* object's class definitions.
*
* @param name the name of the object whose object class definition is to
* be retrieved
* @return the DirContext containing the named object's class
* definitions; never null
* @exception javax.naming.OperationNotSupportedException if schema not
* supported
* @exception NamingException if a naming exception is encountered
*/
@Override
public DirContext getSchemaClassDefinition(Name name)
throws NamingException {
return getSchemaClassDefinition(name.toString());
}
/**
* Retrieves a context containing the schema objects of the named
* object's class definitions.
*
* @param name the name of the object whose object class definition is to
* be retrieved
* @return the DirContext containing the named object's class
* definitions; never null
* @exception javax.naming.OperationNotSupportedException if schema not
* supported
* @exception NamingException if a naming exception is encountered
*/
@Override
public abstract DirContext getSchemaClassDefinition(String name)
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.
*
* @param name the name of the context to search
* @param matchingAttributes the attributes to search for. If empty or
* null, all objects in the target context are returned.
* @param attributesToReturn the attributes to return. null indicates
* that all attributes are to be returned; an empty array indicates that
* none are to be returned.
* @return 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.
* @exception NamingException if a naming exception is encountered
*/
@Override
public NamingEnumeration<SearchResult> search(Name name,
Attributes matchingAttributes, String[] attributesToReturn)
throws NamingException {
return search(name.toString(), matchingAttributes, attributesToReturn);
}
/**
* Searches in a single context for objects that contain a specified set
* of attributes, and retrieves selected attributes.
*
* @param name the name of the context to search
* @param matchingAttributes the attributes to search for. If empty or
* null, all objects in the target context are returned.
* @param attributesToReturn the attributes to return. null indicates
* that all attributes are to be returned; an empty array indicates that
* none are to be returned.
* @return 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.
* @exception NamingException if a naming exception is encountered
*/
@Override
public abstract 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. 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[]).
*
* @param name the name of the context to search
* @param matchingAttributes the attributes to search for. If empty or
* null, all objects in the target context are returned.
* @return 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.
* @exception NamingException if a naming exception is encountered
*/
@Override
public NamingEnumeration<SearchResult> search(Name name,
Attributes matchingAttributes) throws NamingException {
return search(name.toString(), matchingAttributes);
}
/**
* Searches in a single context for objects that contain a specified set
* of attributes.
*
* @param name the name of the context to search
* @param matchingAttributes the attributes to search for. If empty or
* null, all objects in the target context are returned.
* @return 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.
* @exception NamingException if a naming exception is encountered
*/
@Override
public abstract NamingEnumeration<SearchResult> search
(String name, Attributes matchingAttributes)
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.
*
* @param name the name of the context or object to search
* @param filter the filter expression to use for the search; may not be
* null
* @param cons the search controls that control the search. If null,
* the default search controls are used (equivalent to
* (new SearchControls())).
* @return an enumeration of SearchResults of the objects that satisfy
* the filter; never null
* @exception javax.naming.directory.InvalidSearchFilterException if the
* search filter specified is not supported or understood by the underlying
* directory
* @exception javax.naming.directory.InvalidSearchControlsException if the
* search controls contain invalid settings
* @exception NamingException if a naming exception is encountered
*/
@Override
public NamingEnumeration<SearchResult> search
(Name name, String filter, SearchControls cons)
throws NamingException {
return search(name.toString(), filter, cons);
}
/**
* Searches in the named context or object for entries that satisfy the
* given search filter. Performs the search as specified by the search
* controls.
*
* @param name the name of the context or object to search
* @param filter the filter expression to use for the search; may not be
* null
* @param cons the search controls that control the search. If null,
* the default search controls are used (equivalent to
* (new SearchControls())).
* @return an enumeration of SearchResults of the objects that satisfy
* the filter; never null
* @exception javax.naming.directory.InvalidSearchFilterException if the
* search filter specified is not supported or understood by the underlying
* directory
* @exception javax.naming.directory.InvalidSearchControlsException if the
* search controls contain invalid settings
* @exception NamingException if a naming exception is encountered
*/
@Override
public abstract 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.
*
* @param name the name of the context or object to search
* @param 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.
* @param 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.
* @param cons the search controls that control the search. If null, the
* default search controls are used (equivalent to (new SearchControls())).
* @return an enumeration of SearchResults of the objects that satisy the
* filter; never null
* @exception ArrayIndexOutOfBoundsException if filterExpr contains {i}
* expressions where i is outside the bounds of the array filterArgs
* @exception javax.naming.directory.InvalidSearchControlsException if the
* search controls contain invalid settings
* @exception javax.naming.directory.InvalidSearchFilterException if
* filterExpr with filterArgs represents an invalid search filter
* @exception NamingException if a naming exception is encountered
*/
@Override
public NamingEnumeration<SearchResult> search(Name name, String filterExpr,
Object[] filterArgs, SearchControls cons)
throws NamingException {
return search(name.toString(), filterExpr, filterArgs, cons);
}
/**
* Searches in the named context or object for entries that satisfy the
* given search filter. Performs the search as specified by the search
* controls.
*
* @param name the name of the context or object to search
* @param 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.
* @param 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.
* @param cons the search controls that control the search. If null, the
* default search controls are used (equivalent to (new SearchControls())).
* @return an enumeration of SearchResults of the objects that satisfy the
* filter; never null
* @exception ArrayIndexOutOfBoundsException if filterExpr contains {i}
* expressions where i is outside the bounds of the array filterArgs
* @exception javax.naming.directory.InvalidSearchControlsException if the
* search controls contain invalid settings
* @exception javax.naming.directory.InvalidSearchFilterException if
* filterExpr with filterArgs represents an invalid search filter
* @exception NamingException if a naming exception is encountered
*/
@Override
public abstract NamingEnumeration<SearchResult> search
(String name, String filterExpr,
Object[] filterArgs, SearchControls cons)
throws NamingException;
// ------------------------------------------------------ Protected Methods
protected abstract Attributes doGetAttributes(String name, String[] attrIds)
throws NamingException;
protected abstract Object doLookup(String name);
protected abstract List<NamingEntry> doListBindings(String name)
throws NamingException;
protected abstract String doGetRealPath(String name);
// -------------------------------------------------------- Private Methods
private AliasResult findAlias(String name) {
AliasResult result = new AliasResult();
// The JNDI resources code mixes names (that don't have leading '/') and
// paths (which do have leading '/'). This code is a little messy but
// the alternative is reviewing the entire o.a.n.resources package for
// the correct use of name vs path and that is very likely to break
// clients (including Tomcat internals and user applications).
String searchName;
boolean slashAppended;
if (name.length() == 0) {
searchName = "/";
slashAppended = true;
} else if (name.charAt(0) == '/') {
searchName = name;
slashAppended = false;
} else {
searchName = "/" + name;
slashAppended = true;
}
result.dirContext = aliases.get(searchName);
while (result.dirContext == null) {
int slash = searchName.lastIndexOf('/');
if (slash < 0)
break;
searchName = searchName.substring(0, slash);
result.dirContext = aliases.get(searchName);
}
if (result.dirContext != null) {
if (slashAppended) {
result.aliasName = name.substring(searchName.length() - 1);
} else {
result.aliasName = name.substring(searchName.length());
}
}
return result;
}
private static class AliasResult {
BaseDirContext dirContext;
String aliasName;
}
}