UninitializedMessageException.java

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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
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// modification, are permitted provided that the following conditions are
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//
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// in the documentation and/or other materials provided with the
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//
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package com.google.protobuf;
 
import java.util.Collections;
import java.util.List;
 
public class UninitializedMessageException extends RuntimeException {
  private static final long serialVersionUID = -7466929953374883507L;
 
  public UninitializedMessageException(final MessageLite message) {
    super(
        "Message was missing required fields.  (Lite runtime could not "
            + "determine which fields were missing).");
    missingFields = null;
  }
 
  public UninitializedMessageException(final List<String> missingFields) {
    super(buildDescription(missingFields));
    this.missingFields = missingFields;
  }
 
  private final List<String> missingFields;
 
  public List<String> getMissingFields() {
    return Collections.unmodifiableList(missingFields);
  }
 
  public InvalidProtocolBufferException asInvalidProtocolBufferException() {
    return new InvalidProtocolBufferException(getMessage());
  }
 
  private static String buildDescription(final List<String> missingFields) {
    final StringBuilder description = new StringBuilder("Message missing required fields: ");
    boolean first = true;
    for (final String field : missingFields) {
      if (first) {
        first = false;
      } else {
        description.append(", ");
      }
      description.append(field);
    }
    return description.toString();
  }
}