001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package org.apache.hadoop.security;
020    
021    import java.net.URI;
022    
023    import org.apache.hadoop.fs.Path;
024    
025    public class ProviderUtils {
026      /**
027       * Convert a nested URI to decode the underlying path. The translation takes
028       * the authority and parses it into the underlying scheme and authority.
029       * For example, "myscheme://hdfs@nn/my/path" is converted to
030       * "hdfs://nn/my/path".
031       * @param nestedUri the URI from the nested URI
032       * @return the unnested path
033       */
034      public static Path unnestUri(URI nestedUri) {
035        String[] parts = nestedUri.getAuthority().split("@", 2);
036        StringBuilder result = new StringBuilder(parts[0]);
037        result.append("://");
038        if (parts.length == 2) {
039          result.append(parts[1]);
040        }
041        result.append(nestedUri.getPath());
042        if (nestedUri.getQuery() != null) {
043          result.append("?");
044          result.append(nestedUri.getQuery());
045        }
046        if (nestedUri.getFragment() != null) {
047          result.append("#");
048          result.append(nestedUri.getFragment());
049        }
050        return new Path(result.toString());
051      }
052    }