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 */
018package org.apache.hadoop.hbase.security.token;
019
020import java.util.Collection;
021import org.apache.hadoop.io.Text;
022import org.apache.hadoop.security.token.Token;
023import org.apache.hadoop.security.token.TokenIdentifier;
024import org.apache.hadoop.security.token.TokenSelector;
025import org.apache.yetus.audience.InterfaceAudience;
026import org.slf4j.Logger;
027import org.slf4j.LoggerFactory;
028
029@InterfaceAudience.Private
030public class AuthenticationTokenSelector implements TokenSelector<AuthenticationTokenIdentifier> {
031  private static final Logger LOG = LoggerFactory.getLogger(AuthenticationTokenSelector.class);
032
033  public AuthenticationTokenSelector() {
034  }
035
036  @Override
037  public Token<AuthenticationTokenIdentifier> selectToken(Text serviceName,
038    Collection<Token<? extends TokenIdentifier>> tokens) {
039    if (serviceName != null) {
040      for (Token ident : tokens) {
041        if (
042          serviceName.equals(ident.getService())
043            && AuthenticationTokenIdentifier.AUTH_TOKEN_TYPE.equals(ident.getKind())
044        ) {
045          if (LOG.isDebugEnabled()) {
046            LOG.debug("Returning token " + ident);
047          }
048          return (Token<AuthenticationTokenIdentifier>) ident;
049        }
050      }
051    }
052    LOG.debug("No matching token found");
053    return null;
054  }
055}