Source Code Cross Referenced for JndiPath.java in  » EJB-Server-resin-3.1.5 » util » com » caucho » vfs » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » EJB Server resin 3.1.5 » util » com.caucho.vfs 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


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:         *   Free SoftwareFoundation, Inc.
023:         *   59 Temple Place, Suite 330
024:         *   Boston, MA 02111-1307  USA
025:         *
026:         * @author Scott Ferguson
027:         */
028:
029:        package com.caucho.vfs;
030:
031:        import com.caucho.util.L10N;
032:        import com.caucho.util.Log;
033:
034:        import javax.naming.Context;
035:        import javax.naming.InitialContext;
036:        import javax.naming.NamingException;
037:        import java.io.IOException;
038:        import java.util.Map;
039:        import java.util.logging.Logger;
040:
041:        /**
042:         * Adapts the JNDI to the Path API.  The name separator is always '/'.
043:         *
044:         * @since Resin 1.2
045:         */
046:        public class JndiPath extends FilesystemPath {
047:            protected static final Logger log = Log.open(JndiPath.class);
048:            protected static final L10N L = new L10N(JndiPath.class);
049:
050:            private Context parent;
051:
052:            /**
053:             * Creates a new JndiPath root.
054:             */
055:            public JndiPath() {
056:                super (null, "/", "/");
057:
058:                _root = this ;
059:            }
060:
061:            /**
062:             * Create a new JndiPath with the given name.
063:             */
064:            protected JndiPath(FilesystemPath root, String userPath, String path) {
065:                super (root, userPath, path);
066:            }
067:
068:            /**
069:             * Walking down the path just stores the new name in the created Path.
070:             *
071:             * @param userPath the string used in the <code>lookup</code> call.
072:             * @param attributes any inherited attributes.
073:             * @param path the normalized slash-separated path.
074:             * @return a new JndiPath representing the new path.
075:             */
076:            public Path fsWalk(String userPath, Map<String, Object> attributes,
077:                    String path) {
078:                return new JndiPath(_root, userPath, path);
079:            }
080:
081:            /**
082:             * The scheme is always "jndi:".
083:             */
084:            public String getScheme() {
085:                return "jndi";
086:            }
087:
088:            /**
089:             * Create a new subcontext
090:             */
091:            public boolean mkdir() throws IOException {
092:                try {
093:                    Context parent = getAllButLast(getPath());
094:
095:                    parent.createSubcontext(getTail());
096:
097:                    return true;
098:                } catch (Exception e) {
099:                    throw new IOExceptionWrapper(e);
100:                }
101:            }
102:
103:            /**
104:             * Returns the object bound at this path.
105:             */
106:            public Object getObject() throws IOException {
107:                try {
108:                    Context parent = getAllButLast(getPath());
109:
110:                    return parent.lookup(getTail());
111:                } catch (Exception e) {
112:                    throw new IOExceptionWrapper(e);
113:                }
114:            }
115:
116:            /**
117:             * Sets the object bound at this path.
118:             *
119:             * @param value the new value
120:             */
121:            public void setObject(Object value) throws IOException {
122:                try {
123:                    Context parent = getAllButLast(getPath());
124:
125:                    parent.rebind(getTail(), value);
126:                } catch (Exception e) {
127:                    e.printStackTrace();
128:                    throw new IOExceptionWrapper(e);
129:                }
130:            }
131:
132:            /**
133:             * Returns the context found by looking up all but the last segment
134:             * of the path.
135:             *
136:             * @param path slash-separated path
137:             * @return context of the parent path
138:             */
139:            private Context getAllButLast(String path) throws NamingException {
140:                if (parent != null)
141:                    return parent;
142:
143:                Context context = new InitialContext();
144:
145:                int head = 1;
146:                int tail;
147:
148:                while ((tail = path.indexOf('/', head)) > 0) {
149:                    String section = path.substring(head, tail);
150:
151:                    if (context == null)
152:                        throw new NamingException(L.l("null context for `{0}'",
153:                                path));
154:
155:                    context = (Context) context.lookup(section);
156:
157:                    head = tail + 1;
158:                }
159:
160:                parent = context;
161:
162:                return parent;
163:            }
164:        }
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