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/*
* 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.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;
import javax.naming.Binding;
import javax.naming.CompositeName;
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.BasicAttributes;
import javax.naming.directory.DirContext;
import javax.naming.directory.ModificationItem;
import javax.naming.directory.SearchControls;
import javax.naming.directory.SearchResult;
/**
* A {@link DirContext} implementation that is not backed by a file system
* and behaves as if it has no resources available. This is primarily used in
* embedded mode when the web application is configured entirely
* programmatically and does not use any static resources from the file system.
* EmptyDirContext is implemented as a read only context.
*/
public class EmptyDirContext implements DirContext {
/**
* Static field to avoid useless object creation
*/
private static final Attributes emptyAttributes = new BasicAttributes();
private static final NameNotFoundException nameNotFoundException = new ImmutableNameNotFoundException();
private static final Name emptyName = new CompositeName();
private static final Hashtable emptyEnv = new Hashtable();
private static final String emptyString = "";
/**
* Non-static field to avoid useless object creation
*/
@SuppressWarnings("rawtypes")
private final NamingEnumeration emptyEnum = new EmptyNamingEnumImpl();
private final NameParser nameParser = new NameParserImpl();
@Override
public Attributes getAttributes(Name name) throws NamingException {
return emptyAttributes;
}
@Override
public Attributes getAttributes(String name) throws NamingException {
return emptyAttributes;
}
@Override
public Attributes getAttributes(Name name, String[] attrIds) throws NamingException {
return emptyAttributes;
}
@Override
public Attributes getAttributes(String name, String[] attrIds) throws NamingException {
return emptyAttributes;
}
@Override
public void modifyAttributes(Name name, int mod_op, Attributes attrs) throws NamingException {
// no op
}
@Override
public void modifyAttributes(String name, int mod_op, Attributes attrs) throws NamingException {
// no op
}
@Override
public void modifyAttributes(Name name, ModificationItem[] mods) throws NamingException {
// no op
}
@Override
public void modifyAttributes(String name, ModificationItem[] mods) throws NamingException {
// no op
}
@Override
public void bind(Name name, Object obj, Attributes attrs) throws NamingException {
// no op
}
@Override
public void bind(String name, Object obj, Attributes attrs) throws NamingException {
// no op
}
@Override
public void rebind(Name name, Object obj, Attributes attrs) throws NamingException {
// no op
}
@Override
public void rebind(String name, Object obj, Attributes attrs) throws NamingException {
// no op
}
@Override
public DirContext createSubcontext(Name name, Attributes attrs) throws NamingException {
return this;
}
@Override
public DirContext createSubcontext(String name, Attributes attrs) throws NamingException {
return this;
}
@Override
public DirContext getSchema(Name name) throws NamingException {
return this;
}
@Override
public DirContext getSchema(String name) throws NamingException {
return this;
}
@Override
public DirContext getSchemaClassDefinition(Name name) throws NamingException {
return this;
}
@Override
public DirContext getSchemaClassDefinition(String name) throws NamingException {
return this;
}
@Override
@SuppressWarnings("unchecked")
public NamingEnumeration search(Name name, Attributes matchingAttributes,
String[] attributesToReturn) throws NamingException {
return emptyEnum;
}
@Override
@SuppressWarnings("unchecked")
public NamingEnumeration search(String name, Attributes matchingAttributes,
String[] attributesToReturn) throws NamingException {
return emptyEnum;
}
@Override
@SuppressWarnings("unchecked")
public NamingEnumeration search(Name name, Attributes matchingAttributes)
throws NamingException {
return emptyEnum;
}
@Override
@SuppressWarnings("unchecked")
public NamingEnumeration search(String name, Attributes matchingAttributes)
throws NamingException {
return emptyEnum;
}
@Override
@SuppressWarnings("unchecked")
public NamingEnumeration search(Name name, String filter, SearchControls cons)
throws NamingException {
return emptyEnum;
}
@Override
@SuppressWarnings("unchecked")
public NamingEnumeration search(String name, String filter, SearchControls cons)
throws NamingException {
return emptyEnum;
}
@Override
@SuppressWarnings("unchecked")
public NamingEnumeration search(Name name, String filterExpr,
Object[] filterArgs, SearchControls cons) throws NamingException {
return emptyEnum;
}
@Override
@SuppressWarnings("unchecked")
public NamingEnumeration search(String name, String filterExpr,
Object[] filterArgs, SearchControls cons) throws NamingException {
return emptyEnum;
}
@Override
public Object lookup(Name name) throws NamingException {
throw nameNotFoundException;
}
@Override
public Object lookup(String name) throws NamingException {
throw nameNotFoundException;
}
@Override
public void bind(Name name, Object obj) throws NamingException {
// no op
}
@Override
public void bind(String name, Object obj) throws NamingException {
// no op
}
@Override
public void rebind(Name name, Object obj) throws NamingException {
// no op
}
@Override
public void rebind(String name, Object obj) throws NamingException {
// no op
}
@Override
public void unbind(Name name) throws NamingException {
// no op
}
@Override
public void unbind(String name) throws NamingException {
// no op
}
@Override
public void rename(Name oldName, Name newName) throws NamingException {
// no op
}
@Override
public void rename(String oldName, String newName) throws NamingException {
// no op
}
@Override
@SuppressWarnings("unchecked")
public NamingEnumeration list(Name name) throws NamingException {
return emptyEnum;
}
@Override
@SuppressWarnings("unchecked")
public NamingEnumeration list(String name) throws NamingException {
return emptyEnum;
}
@Override
@SuppressWarnings("unchecked")
public NamingEnumeration listBindings(Name name) throws NamingException {
return emptyEnum;
}
@Override
@SuppressWarnings("unchecked")
public NamingEnumeration listBindings(String name) throws NamingException {
return emptyEnum;
}
@Override
public void destroySubcontext(Name name) throws NamingException {
// no op
}
@Override
public void destroySubcontext(String name) throws NamingException {
// no op
}
@Override
public Context createSubcontext(Name name) throws NamingException {
return this;
}
@Override
public Context createSubcontext(String name) throws NamingException {
return this;
}
@Override
public Object lookupLink(Name name) throws NamingException {
throw nameNotFoundException;
}
@Override
public Object lookupLink(String name) throws NamingException {
throw nameNotFoundException;
}
@Override
public NameParser getNameParser(Name name) throws NamingException {
return nameParser;
}
@Override
public NameParser getNameParser(String name) throws NamingException {
return nameParser;
}
@Override
public Name composeName(Name name, Name prefix) throws NamingException {
return emptyName;
}
@Override
public String composeName(String name, String prefix) throws NamingException {
return emptyString;
}
@Override
public Object addToEnvironment(String propName, Object propVal) throws NamingException {
return null;
}
@Override
public Object removeFromEnvironment(String propName) throws NamingException {
return null;
}
@Override
public Hashtable getEnvironment() throws NamingException {
return emptyEnv;
}
@Override
public void close() throws NamingException {
// NO OP
}
@Override
public String getNameInNamespace() throws NamingException {
return emptyString;
}
static class EmptyNamingEnumImpl implements NamingEnumeration {
Enumeration elements = new Vector().elements();
@Override
public T next() throws NamingException {
return nextElement();
}
@Override
public boolean hasMore() throws NamingException {
return hasMoreElements();
}
@Override
public void close() throws NamingException {
elements = null;
}
@Override
public boolean hasMoreElements() {
return elements.hasMoreElements();
}
@Override
public T nextElement() {
return elements.nextElement();
}
}
static class NameParserImpl implements NameParser {
@Override
public Name parse(String name) throws NamingException {
return emptyName;
}
}
}
