content: /**
   * 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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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.atlas.type;
  
  import org.apache.atlas.exception.AtlasBaseException;
  import org.apache.atlas.model.instance.AtlasEntity;
  
  public class AttributeToken implements TemplateToken {
      private final String attrName;
  
      public AttributeToken(String attrName) {
          this.attrName = attrName;
      }
  
      @Override
      public String eval(AtlasEntity entity) throws AtlasBaseException {
          Object ret = entity.getAttribute(attrName);
  
          if (ret == null) {
              return null;
          }
  
          return ret.toString();
      }
  
      @Override
      public String getValue() {
          return attrName;
      }
  }
  