/**
    * Copyright (C) 2010-14 pvmanager developers. See COPYRIGHT.TXT
    * All rights reserved. Use is subject to license terms. See LICENSE.TXT
    */
   package org.epics.pvmanager.jca;
   
   import gov.aps.jca.dbr.DBR_LABELS_Enum;
   import gov.aps.jca.dbr.DBR_TIME_Enum;
   import java.util.Arrays;
  import java.util.List;
  import org.epics.vtype.VEnum;
  import org.epics.vtype.VTypeToString;
  
  /**
   *
   * @author carcassi
   */
  class VEnumFromDbr extends VMetadata<DBR_TIME_Enum> implements VEnum {
  
      private final DBR_LABELS_Enum metadata;
  
      public VEnumFromDbr(DBR_TIME_Enum dbrValue, DBR_LABELS_Enum metadata, JCAConnectionPayload connPayload) {
          super(dbrValue, connPayload);
          this.metadata = metadata;
      }
  
      @Override
      public String getValue() {
          // There are pathological cases in which CA returns no labels.
          // In those cases, we return the integer value converted to String.
          if (metadata.getLabels() == null) {
              return Integer.toString(getIndex());
          }
          
          // There are also pathologica cases in which the labels
          // are less than the actual value
          if (getIndex() >= metadata.getLabels().length || getIndex() < 0) {
              return Integer.toString(getIndex());
          }
          
          return getLabels().get(getIndex());
      }
  
      @Override
      public int getIndex() {
          return dbrValue.getEnumValue()[0];
      }
  
      @Override
      public List<String> getLabels() {
          if (metadata.getLabels() == null)
              throw new RuntimeException("Metadata returned no labels");
          return Arrays.asList(metadata.getLabels());
      }
      
      @Override
      public String toString() {
          return VTypeToString.toString(this);
      }
  
  }