001: /*
002: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
003: *
004: * This file is part of Resin(R) Open Source
005: *
006: * Each copy or derived work must preserve the copyright notice and this
007: * notice unmodified.
008: *
009: * Resin Open Source is free software; you can redistribute it and/or modify
010: * it under the terms of the GNU General Public License as published by
011: * the Free Software Foundation; either version 2 of the License, or
012: * (at your option) any later version.
013: *
014: * Resin Open Source is distributed in the hope that it will be useful,
015: * but WITHOUT ANY WARRANTY; without even the implied warranty of
016: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017: * of NON-INFRINGEMENT. See the GNU General Public License for more
018: * details.
019: *
020: * You should have received a copy of the GNU General Public License
021: * along with Resin Open Source; if not, write to the
022: *
023: * Free Software Foundation, Inc.
024: * 59 Temple Place, Suite 330
025: * Boston, MA 02111-1307 USA
026: *
027: * @author Scott Ferguson
028: */
029:
030: package com.caucho.naming;
031:
032: import javax.naming.NamingException;
033: import java.util.ArrayList;
034: import java.util.HashMap;
035: import java.util.List;
036:
037: /**
038: * Memory based model for JNDI.
039: */
040: public class MemoryModel extends AbstractModel {
041: private HashMap<String, Object> _children = new HashMap<String, Object>(
042: 8);
043:
044: /**
045: * Creates a new instance of the memory model.
046: */
047: public MemoryModel() {
048: }
049:
050: /**
051: * Creates a new instance of MemoryModel.
052: */
053: protected AbstractModel create() {
054: return new MemoryModel();
055: }
056:
057: /**
058: * Returns the object from looking up a single link.
059: *
060: * @param name the name segment.
061: *
062: * @return the object stored in the map.
063: */
064: public Object lookup(String name) throws NamingException {
065: return _children.get(name);
066: }
067:
068: /**
069: * Rebinds an object as a child to the model.
070: */
071: public void bind(String name, Object obj) throws NamingException {
072: _children.put(name, obj);
073: }
074:
075: /**
076: * Unbinds an object as a child to the model.
077: */
078: public void unbind(String name) throws NamingException {
079: _children.remove(name);
080: }
081:
082: /**
083: * Creates a subcontext.
084: */
085: public AbstractModel createSubcontext(String name)
086: throws NamingException {
087: if (_children.get(name) != null)
088: throw new NamingException("can't create subcontext: "
089: + name + " " + _children.get(name));
090:
091: MemoryModel model = new MemoryModel();
092:
093: _children.put(name, model);
094:
095: return model;
096: }
097:
098: /**
099: * Lists the child names.
100: */
101: public List list() {
102: return new ArrayList(_children.keySet());
103: }
104: }
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