protobuf/java/core/src/main/java/com/google/protobuf/InvalidProtocolBufferException.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/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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package com.google.protobuf;
 
import java.io.IOException;
 
public class InvalidProtocolBufferException extends IOException {
  private static final long serialVersionUID = -1616151763072450476L;
  private MessageLite unfinishedMessage = null;
  private boolean wasThrownFromInputStream;
 
  public InvalidProtocolBufferException(final String description) {
    super(description);
  }
 
  public InvalidProtocolBufferException(IOException e) {
    super(e.getMessage(), e);
  }
 
  public InvalidProtocolBufferException(final String description, IOException e) {
    super(description, e);
  }
 
  public InvalidProtocolBufferException setUnfinishedMessage(MessageLite unfinishedMessage) {
    this.unfinishedMessage = unfinishedMessage;
    return this;
  }
 
  public MessageLite getUnfinishedMessage() {
    return unfinishedMessage;
  }
 
  void setThrownFromInputStream() {
    /* This write can be racy if the same exception is stored and then thrown by multiple custom
     * InputStreams on different threads. But since it only ever moves from false->true, there's no
     * problem. A thread checking this condition after catching this exception from a delegate
     * stream of CodedInputStream is guaranteed to always observe true, because a write on the same
     * thread set the value when the exception left the delegate. A thread checking the same
     * condition with an exception created by CodedInputStream is guaranteed to always see false,
     * because the exception has not been exposed to any code that could publish it to other threads
     * and cause a write.
     */
    wasThrownFromInputStream = true;
  }
 
  boolean getThrownFromInputStream() {
    return wasThrownFromInputStream;
  }
 
  public IOException unwrapIOException() {
    return getCause() instanceof IOException ? (IOException) getCause() : this;
  }
 
  static InvalidProtocolBufferException truncatedMessage() {
    return new InvalidProtocolBufferException(
        "While parsing a protocol message, the input ended unexpectedly "
            + "in the middle of a field.  This could mean either that the "
            + "input has been truncated or that an embedded message "
            + "misreported its own length.");
  }
 
  static InvalidProtocolBufferException negativeSize() {
    return new InvalidProtocolBufferException(
        "CodedInputStream encountered an embedded string or message "
            + "which claimed to have negative size.");
  }
 
  static InvalidProtocolBufferException malformedVarint() {
    return new InvalidProtocolBufferException("CodedInputStream encountered a malformed varint.");
  }
 
  static InvalidProtocolBufferException invalidTag() {
    return new InvalidProtocolBufferException("Protocol message contained an invalid tag (zero).");
  }
 
  static InvalidProtocolBufferException invalidEndTag() {
    return new InvalidProtocolBufferException(
        "Protocol message end-group tag did not match expected tag.");
  }
 
  static InvalidWireTypeException invalidWireType() {
    return new InvalidWireTypeException("Protocol message tag had invalid wire type.");
  }
 
  @ExperimentalApi
  public static class InvalidWireTypeException extends InvalidProtocolBufferException {
    private static final long serialVersionUID = 3283890091615336259L;
 
    public InvalidWireTypeException(String description) {
      super(description);
    }
  }
 
  static InvalidProtocolBufferException recursionLimitExceeded() {
    return new InvalidProtocolBufferException(
        "Protocol message had too many levels of nesting.  May be malicious.  "
            + "Use CodedInputStream.setRecursionLimit() to increase the depth limit.");
  }
 
  static InvalidProtocolBufferException sizeLimitExceeded() {
    return new InvalidProtocolBufferException(
        "Protocol message was too large.  May be malicious.  "
            + "Use CodedInputStream.setSizeLimit() to increase the size limit.");
  }
 
  static InvalidProtocolBufferException parseFailure() {
    return new InvalidProtocolBufferException("Failed to parse the message.");
  }
 
  static InvalidProtocolBufferException invalidUtf8() {
    return new InvalidProtocolBufferException("Protocol message had invalid UTF-8.");
  }
}