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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.openejb.util;

import javax.naming.Context;
import javax.naming.NamingException;

public final class Contexts {
    private Contexts() {
        // no-op
    }

    public static void unbindLeaf(final Context context, final String path) {
        if (path == null) {
            return;
        }

        final String[] parts = path.split("/");
        final String name = parts[parts.length - 1];
        if (parts.length > 1 && parts[0].startsWith("java:")) {
            parts[0] = parts[0].substring("java:".length());
        }

        Context lastContext = context;
        for (int i = 0; i < parts.length - 1; i++) { // browse it this way to do the same than createSubcontexts
            try {
                lastContext = (Context) lastContext.lookup(parts[i]);
            } catch (final NamingException e) {
                return;
            }
        }

        try {
            lastContext.unbind(name);
        } catch (final NamingException e) {
            // no-op
        }
    }

    public static Context createSubcontexts(final Context context, final String key) {
        final String[] parts = key.split("/");

        int i = 0;
        Context lastContext = context;
        for (final String part : parts) {
            if (++i == parts.length) {
                return lastContext;
            }

            try {
                lastContext = lastContext.createSubcontext(part);
            } catch (final NamingException e) {
                try {
                    lastContext = (Context) lastContext.lookup(part);
                } catch (final NamingException e1) {
                    return lastContext;
                }
            }
        }
        return lastContext;
    }
}