001/*
002 * (C) Copyright 2011 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     matic
018 */
019package org.nuxeo.runtime.jtajca;
020
021import javax.naming.Context;
022import javax.naming.InitialContext;
023import javax.naming.NamingException;
024
025/**
026 * Utility class used for testing JNDI space provider.
027 *
028 * @author Stephane Lacoin (aka matic)
029 * @since 5.5
030 */
031public class InitialContextAccessor extends InitialContext {
032
033    public static final String ENV_CTX_NAME = "java:comp/env";
034
035    protected InitialContextAccessor() throws NamingException {
036        super(false); // lazy mode is breaking jboss
037    }
038
039    protected Context _getInitCtx() {
040        try {
041            return getURLOrDefaultInitCtx("java:");
042        } catch (NamingException e) {
043            return null;
044        }
045    }
046
047    /**
048     * Check for JNDI space availability
049     *
050     * @return true if JNDI space exists
051     */
052    public static boolean isAvailable() {
053        try {
054            return new InitialContextAccessor().getDefaultInitCtx() != null;
055        } catch (NamingException e) {
056            return false;
057        }
058    }
059
060    /**
061     * Try writing in JNDI space
062     *
063     * @param ctx
064     * @return true if JNDI space is writable
065     */
066    public static boolean isWritable(Context ctx, String prefix) {
067        try {
068            final String name = prefix.concat("IsWritable");
069            ctx.bind(name, "is-writable");
070            ctx.unbind(name);
071        } catch (NamingException e) {
072            return false;
073        }
074        return true;
075    }
076
077    /**
078     * Get access to the default initial context implementation
079     *
080     * @return the initial context implementation
081     */
082    public static Context getInitialContext() {
083        try {
084            return new InitialContextAccessor()._getInitCtx();
085        } catch (NamingException e) {
086            return null;
087        }
088    }
089
090}