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    package org.apache.hadoop.hdfs.web.resources;
019    
020    import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_WEBHDFS_ACL_PERMISSION_PATTERN_DEFAULT;
021    
022    import java.util.List;
023    import java.util.regex.Pattern;
024    
025    import org.apache.hadoop.fs.permission.AclEntry;
026    import org.apache.commons.lang.StringUtils;
027    
028    /** AclPermission parameter. */
029    public class AclPermissionParam extends StringParam {
030      /** Parameter name. */
031      public static final String NAME = "aclspec";
032      /** Default parameter value. */
033      public static final String DEFAULT = "";
034    
035      private static final Domain DOMAIN = new Domain(NAME,
036          Pattern.compile(DFS_WEBHDFS_ACL_PERMISSION_PATTERN_DEFAULT));
037    
038      /**
039       * Constructor.
040       * 
041       * @param str a string representation of the parameter value.
042       */
043      public AclPermissionParam(final String str) {
044        super(DOMAIN, str == null || str.equals(DEFAULT) ? null : str);
045      }
046    
047      public AclPermissionParam(List<AclEntry> acl) {
048        super(DOMAIN,parseAclSpec(acl).equals(DEFAULT) ? null : parseAclSpec(acl));
049      }
050    
051      @Override
052      public String getName() {
053        return NAME;
054      }
055    
056      public List<AclEntry> getAclPermission(boolean includePermission) {
057        final String v = getValue();
058        return (v != null ? AclEntry.parseAclSpec(v, includePermission) : AclEntry
059            .parseAclSpec(DEFAULT, includePermission));
060      }
061    
062      /**
063       * @return parse {@code aclEntry} and return aclspec
064       */
065      private static String parseAclSpec(List<AclEntry> aclEntry) {
066        return StringUtils.join(aclEntry, ",");
067      }
068    }