/** | |
* | |
* Copyright 2003-2004 The Apache Software Foundation | |
* | |
* Licensed 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.xbean.spring.jndi; | |
import javax.naming.Binding; | |
import javax.naming.CompositeName; | |
import javax.naming.Context; | |
import javax.naming.LinkRef; | |
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.NotContextException; | |
import javax.naming.OperationNotSupportedException; | |
import javax.naming.Reference; | |
import javax.naming.spi.NamingManager; | |
import java.io.Serializable; | |
import java.util.HashMap; | |
import java.util.Hashtable; | |
import java.util.Iterator; | |
import java.util.Map; | |
/** | |
* A simple spring based JNDI context which is mutable | |
* | |
* @version $Revision: 657 $ | |
*/ | |
public class DefaultContext implements Context, Serializable { | |
private static final long serialVersionUID = -5754338187296859149L; | |
protected static final NameParser nameParser = new NameParserImpl(); | |
private boolean freeze = false; | |
protected final Hashtable environment; // environment for this context | |
protected final Map bindings; // bindings at my level | |
protected final Map treeBindings; // all bindings under me | |
private boolean frozen = false; | |
private String nameInNamespace = ""; | |
public static final String SEPARATOR = "/"; | |
public DefaultContext() { | |
environment = new Hashtable(); | |
bindings = new HashMap(); | |
treeBindings = new HashMap(); | |
} | |
public DefaultContext(Hashtable env) { | |
if (env == null) { | |
this.environment = new Hashtable(); | |
} | |
else { | |
this.environment = new Hashtable(env); | |
} | |
this.bindings = new HashMap(); | |
this.treeBindings = new HashMap(); | |
} | |
public DefaultContext(Hashtable environment, Map bindings) { | |
if (environment == null) { | |
this.environment = new Hashtable(); | |
} | |
else { | |
this.environment = new Hashtable(environment); | |
} | |
this.bindings = bindings; | |
treeBindings = new HashMap(); | |
frozen = true; | |
} | |
public DefaultContext(Hashtable environment, Map bindings, String nameInNamespace) { | |
this(environment, bindings); | |
this.nameInNamespace = nameInNamespace; | |
} | |
protected DefaultContext(DefaultContext clone, Hashtable env) { | |
this.bindings = clone.bindings; | |
this.treeBindings = clone.treeBindings; | |
this.environment = new Hashtable(env); | |
} | |
protected DefaultContext(DefaultContext clone, Hashtable env, String nameInNamespace) { | |
this(clone, env); | |
this.nameInNamespace = nameInNamespace; | |
} | |
public Object addToEnvironment(String propName, Object propVal) throws NamingException { | |
return environment.put(propName, propVal); | |
} | |
public Hashtable getEnvironment() throws NamingException { | |
return (Hashtable) environment.clone(); | |
} | |
public Object removeFromEnvironment(String propName) throws NamingException { | |
return environment.remove(propName); | |
} | |
public Object lookup(String name) throws NamingException { | |
if (name.length() == 0) { | |
return this; | |
} | |
Object result = treeBindings.get(name); | |
if (result == null) { | |
result = bindings.get(name); | |
} | |
if (result == null) { | |
int pos = name.indexOf(':'); | |
if (pos > 0) { | |
String scheme = name.substring(0, pos); | |
Context ctx = NamingManager.getURLContext(scheme, environment); | |
if (ctx == null) { | |
throw new NamingException("scheme " + scheme + " not recognized"); | |
} | |
return ctx.lookup(name); | |
} | |
else { | |
// Split out the first name of the path | |
// and look for it in the bindings map. | |
CompositeName path = new CompositeName(name); | |
if (path.size() == 0) { | |
return this; | |
} | |
else { | |
String first = path.get(0); | |
Object obj = bindings.get(first); | |
if (obj == null) { | |
throw new NameNotFoundException(name); | |
} | |
else if (obj instanceof Context && path.size() > 1) { | |
Context subContext = (Context) obj; | |
obj = subContext.lookup(path.getSuffix(1)); | |
} | |
return obj; | |
} | |
} | |
} | |
if (result instanceof LinkRef) { | |
LinkRef ref = (LinkRef) result; | |
result = lookup(ref.getLinkName()); | |
} | |
if (result instanceof Reference) { | |
try { | |
result = NamingManager.getObjectInstance(result, null, null, this.environment); | |
} | |
catch (NamingException e) { | |
throw e; | |
} | |
catch (Exception e) { | |
throw (NamingException) new NamingException("could not look up : " + name).initCause(e); | |
} | |
} | |
if (result instanceof DefaultContext) { | |
String prefix = getNameInNamespace(); | |
if (prefix.length() > 0) { | |
prefix = prefix + SEPARATOR; | |
} | |
result = new DefaultContext((DefaultContext) result, environment, prefix + name); | |
} | |
return result; | |
} | |
public Object lookup(Name name) throws NamingException { | |
return lookup(name.toString()); | |
} | |
public Object lookupLink(String name) throws NamingException { | |
return lookup(name); | |
} | |
public Name composeName(Name name, Name prefix) throws NamingException { | |
Name result = (Name) prefix.clone(); | |
result.addAll(name); | |
return result; | |
} | |
public String composeName(String name, String prefix) throws NamingException { | |
CompositeName result = new CompositeName(prefix); | |
result.addAll(new CompositeName(name)); | |
return result.toString(); | |
} | |
public NamingEnumeration list(String name) throws NamingException { | |
Object o = lookup(name); | |
if (o == this) { | |
return new DefaultContext.ListEnumeration(); | |
} | |
else if (o instanceof Context) { | |
return ((Context) o).list(""); | |
} | |
else { | |
throw new NotContextException(); | |
} | |
} | |
public NamingEnumeration listBindings(String name) throws NamingException { | |
Object o = lookup(name); | |
if (o == this) { | |
return new DefaultContext.ListBindingEnumeration(); | |
} | |
else if (o instanceof Context) { | |
return ((Context) o).listBindings(""); | |
} | |
else { | |
throw new NotContextException(); | |
} | |
} | |
public Object lookupLink(Name name) throws NamingException { | |
return lookupLink(name.toString()); | |
} | |
public NamingEnumeration list(Name name) throws NamingException { | |
return list(name.toString()); | |
} | |
public NamingEnumeration listBindings(Name name) throws NamingException { | |
return listBindings(name.toString()); | |
} | |
public void bind(Name name, Object value) throws NamingException { | |
bind(name.toString(), value); | |
} | |
public void bind(String name, Object value) throws NamingException { | |
checkFrozen(); | |
internalBind(name, value); | |
} | |
public void close() throws NamingException { | |
// ignore | |
} | |
public Context createSubcontext(Name name) throws NamingException { | |
throw new OperationNotSupportedException(); | |
} | |
public Context createSubcontext(String name) throws NamingException { | |
throw new OperationNotSupportedException(); | |
} | |
public void destroySubcontext(Name name) throws NamingException { | |
throw new OperationNotSupportedException(); | |
} | |
public void destroySubcontext(String name) throws NamingException { | |
throw new OperationNotSupportedException(); | |
} | |
public String getNameInNamespace() throws NamingException { | |
return nameInNamespace; | |
} | |
public NameParser getNameParser(Name name) throws NamingException { | |
return nameParser; | |
} | |
public NameParser getNameParser(String name) throws NamingException { | |
return nameParser; | |
} | |
public void rebind(Name name, Object value) throws NamingException { | |
rebind(name.toString(), value); | |
} | |
public void rebind(String name, Object value) throws NamingException { | |
checkFrozen(); | |
internalBind(name, value, true); | |
} | |
public void rename(Name oldName, Name newName) throws NamingException { | |
checkFrozen(); | |
Object value = lookup(oldName); | |
unbind(oldName); | |
bind(newName, value); | |
} | |
public void rename(String oldName, String newName) throws NamingException { | |
Object value = lookup(oldName); | |
unbind(oldName); | |
bind(newName, value); | |
} | |
public void unbind(Name name) throws NamingException { | |
unbind(name.toString()); | |
} | |
public void unbind(String name) throws NamingException { | |
checkFrozen(); | |
internalBind(name, null, true); | |
} | |
private abstract class LocalNamingEnumeration implements NamingEnumeration { | |
private Iterator i = bindings.entrySet().iterator(); | |
public boolean hasMore() throws NamingException { | |
return i.hasNext(); | |
} | |
public boolean hasMoreElements() { | |
return i.hasNext(); | |
} | |
protected Map.Entry getNext() { | |
return (Map.Entry) i.next(); | |
} | |
public void close() throws NamingException { | |
} | |
} | |
private class ListEnumeration extends DefaultContext.LocalNamingEnumeration { | |
public Object next() throws NamingException { | |
return nextElement(); | |
} | |
public Object nextElement() { | |
Map.Entry entry = getNext(); | |
return new NameClassPair((String) entry.getKey(), entry.getValue().getClass().getName()); | |
} | |
} | |
private class ListBindingEnumeration extends DefaultContext.LocalNamingEnumeration { | |
public Object next() throws NamingException { | |
return nextElement(); | |
} | |
public Object nextElement() { | |
Map.Entry entry = getNext(); | |
return new Binding((String) entry.getKey(), entry.getValue()); | |
} | |
} | |
public Map getEntries() { | |
return new HashMap(bindings); | |
} | |
public void setEntries(Map entries) throws NamingException { | |
if (entries != null) { | |
for (Iterator iter = entries.entrySet().iterator(); iter.hasNext();) { | |
Map.Entry entry = (Map.Entry) iter.next(); | |
String name = (String) entry.getKey(); | |
Object value = entry.getValue(); | |
internalBind(name, value); | |
} | |
} | |
} | |
public boolean isFreeze() { | |
return freeze; | |
} | |
public void setFreeze(boolean freeze) { | |
this.freeze = freeze; | |
} | |
/** | |
* internalBind is intended for use only during setup or possibly by suitably synchronized superclasses. | |
* It binds every possible lookup into a map in each context. To do this, each context | |
* strips off one name segment and if necessary creates a new context for it. Then it asks that context | |
* to bind the remaining name. It returns a map containing all the bindings from the next context, plus | |
* the context it just created (if it in fact created it). (the names are suitably extended by the segment | |
* originally lopped off). | |
* | |
* @param name | |
* @param value | |
* @return | |
* @throws javax.naming.NamingException | |
*/ | |
protected Map internalBind(String name, Object value) throws NamingException { | |
return internalBind(name, value, false); | |
} | |
protected Map internalBind(String name, Object value, boolean allowRebind) throws NamingException { | |
if (name == null || name.length() == 0){ | |
throw new NamingException("Invalid Name " + name); | |
} | |
if (frozen){ | |
throw new NamingException("Read only"); | |
} | |
Map newBindings = new HashMap(); | |
int pos = name.indexOf('/'); | |
if (pos == -1) { | |
Object oldValue = treeBindings.put(name, value); | |
if (!allowRebind && oldValue != null) { | |
throw new NamingException("Something already bound at " + name); | |
} | |
bindings.put(name, value); | |
newBindings.put(name, value); | |
} | |
else { | |
String segment = name.substring(0, pos); | |
if (segment == null || segment.length()==0){ | |
throw new NamingException("Invalid segment " + segment); | |
} | |
Object o = treeBindings.get(segment); | |
if (o == null) { | |
o = newContext(); | |
treeBindings.put(segment, o); | |
bindings.put(segment, o); | |
newBindings.put(segment, o); | |
} | |
else if (!(o instanceof DefaultContext)) { | |
throw new NamingException("Something already bound where a subcontext should go"); | |
} | |
DefaultContext defaultContext = (DefaultContext) o; | |
String remainder = name.substring(pos + 1); | |
Map subBindings = defaultContext.internalBind(remainder, value, allowRebind); | |
for (Iterator iterator = subBindings.entrySet().iterator(); iterator.hasNext();) { | |
Map.Entry entry = (Map.Entry) iterator.next(); | |
String subName = segment + "/" + (String) entry.getKey(); | |
Object bound = entry.getValue(); | |
treeBindings.put(subName, bound); | |
newBindings.put(subName, bound); | |
} | |
} | |
return newBindings; | |
} | |
protected void checkFrozen() throws OperationNotSupportedException { | |
if (isFreeze()) { | |
throw new OperationNotSupportedException("JNDI context is frozen!"); | |
} | |
} | |
protected DefaultContext newContext() { | |
return new DefaultContext(); | |
} | |
} |