java/src/main/com/google/appengine/api/conversion/ConversionErrorCode.java

   1 // Copyright 2011 Google Inc. All Rights Reserved.
   2
   3 package com.google.appengine.api.conversion;
   4
   5 import com.google.appengine.api.conversion.ConversionServicePb.ConversionServiceError.ErrorCode;
   6 import com.google.common.collect.ImmutableMap;
   7
   8 import java.util.logging.Logger;
   9
  10 /**
  11  * The error code of Conversion service.
  12  *
  13  */
  14 public enum ConversionErrorCode {
  15   /** Communication to backend service timed-out. */
  16   TIMEOUT,
  17
  18   /** Transient error while accessing the backend, please try again later. */
  19   TRANSIENT_ERROR,
  20
  21   /** Something wrong in the backend that can't be sent back to application. */
  22   INTERNAL_ERROR,
  23
  24   /** Unsupported conversion attempted. */
  25   UNSUPPORTED_CONVERSION,
  26
  27   /** Conversion too large. */
  28   CONVERSION_TOO_LARGE,
  29
  30   /** Too many conversions in one request. */
  31   TOO_MANY_CONVERSIONS,
  32
  33   /** Request not formed properly. */
  34   INVALID_REQUEST;
  35
  36   static final ImmutableMap<Integer, ConversionErrorCode> INT_ENUM_MAP =
  37       new ImmutableMap.Builder<Integer, ConversionErrorCode>()
  38           .put(ErrorCode.TIMEOUT_VALUE, TIMEOUT)
  39           .put(ErrorCode.TRANSIENT_ERROR_VALUE, TRANSIENT_ERROR)
  40           .put(ErrorCode.INTERNAL_ERROR_VALUE, INTERNAL_ERROR)
  41           .put(ErrorCode.UNSUPPORTED_CONVERSION_VALUE, UNSUPPORTED_CONVERSION)
  42           .put(ErrorCode.CONVERSION_TOO_LARGE_VALUE, CONVERSION_TOO_LARGE)
  43           .put(ErrorCode.TOO_MANY_CONVERSIONS_VALUE, TOO_MANY_CONVERSIONS)
  44           .put(ErrorCode.INVALID_REQUEST_VALUE, INVALID_REQUEST)
  45           .build();
  46
  47   static final ImmutableMap<ConversionErrorCode, ErrorCode> ENUM_PROTO_MAP =
  48     new ImmutableMap.Builder<ConversionErrorCode, ErrorCode>()
  49         .put(TIMEOUT, ErrorCode.TIMEOUT)
  50         .put(TRANSIENT_ERROR, ErrorCode.TRANSIENT_ERROR)
  51         .put(INTERNAL_ERROR, ErrorCode.INTERNAL_ERROR)
  52         .put(UNSUPPORTED_CONVERSION, ErrorCode.UNSUPPORTED_CONVERSION)
  53         .put(CONVERSION_TOO_LARGE, ErrorCode.CONVERSION_TOO_LARGE)
  54         .put(TOO_MANY_CONVERSIONS, ErrorCode.TOO_MANY_CONVERSIONS)
  55         .put(INVALID_REQUEST, ErrorCode.INVALID_REQUEST)
  56         .build();
  57
  58   private static final Logger logger = Logger.getLogger(
  59       ConversionErrorCode.class.getName());
  60
  61   /**
  62    * Maps from integer type error code to enum type error code.
  63    *
  64    * @param number the integer type error code
  65    * @return the enum type error code
  66    */
  67   static ConversionErrorCode intToEnum(int number) {
  68     ConversionErrorCode code = INT_ENUM_MAP.get(number);
  69     if (code == null) {
  70       logger.warning(String.format("Error code %d is undefined.", number));
  71       return INTERNAL_ERROR;
  72     }
  73     return code;
  74   }
  75
  76   /**
  77    * Maps from enum type error code to protocol buffer error code.
  78    *
  79    * @param errorCode the enum type error code
  80    * @return the protocol buffer error code
  81    */
  82   static ErrorCode enumToProto(ConversionErrorCode errorCode) {
  83     return ENUM_PROTO_MAP.get(errorCode);
  84   }
  85 }