Subversion Repositories Code-Repo

Rev

Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
86 Kevin 1 
// Protocol Buffers - Google's data interchange format
2 
// Copyright 2008 Google Inc.  All rights reserved.
3 
// http://code.google.com/p/protobuf/
4 
//
5 
// Redistribution and use in source and binary forms, with or without
6 
// modification, are permitted provided that the following conditions are
7 
// met:
8 
//
9 
//     * Redistributions of source code must retain the above copyright
10 
// notice, this list of conditions and the following disclaimer.
11 
//     * Redistributions in binary form must reproduce the above
12 
// copyright notice, this list of conditions and the following disclaimer
13 
// in the documentation and/or other materials provided with the
14 
// distribution.
15 
//     * Neither the name of Google Inc. nor the names of its
16 
// contributors may be used to endorse or promote products derived from
17 
// this software without specific prior written permission.
18 
//
19 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 
 
31 
package com.google.protobuf;
32 
 
33 
import java.util.Collections;
34 
import java.util.List;
35 
 
36 
/**
37 
 * Thrown when attempting to build a protocol message that is missing required
38 
 * fields.  This is a {@code RuntimeException} because it normally represents
39 
 * a programming error:  it happens when some code which constructs a message
40 
 * fails to set all the fields.  {@code parseFrom()} methods <b>do not</b>
41 
 * throw this; they throw an {@link InvalidProtocolBufferException} if
42 
 * required fields are missing, because it is not a programming error to
43 
 * receive an incomplete message.  In other words,
44 
 * {@code UninitializedMessageException} should never be thrown by correct
45 
 * code, but {@code InvalidProtocolBufferException} might be.
46 
 *
47 
 * @author kenton@google.com Kenton Varda
48 
 */
49 
public class UninitializedMessageException extends RuntimeException {
50 
  private static final long serialVersionUID = -7466929953374883507L;
51 
 
52 
  public UninitializedMessageException(final MessageLite message) {
53 
    super("Message was missing required fields.  (Lite runtime could not " +
54 
          "determine which fields were missing).");
55 
    missingFields = null;
56 
  }
57 
 
58 
  public UninitializedMessageException(final List<String> missingFields) {
59 
    super(buildDescription(missingFields));
60 
    this.missingFields = missingFields;
61 
  }
62 
 
63 
  private final List<String> missingFields;
64 
 
65 
  /**
66 
   * Get a list of human-readable names of required fields missing from this
67 
   * message.  Each name is a full path to a field, e.g. "foo.bar[5].baz".
68 
   * Returns null if the lite runtime was used, since it lacks the ability to
69 
   * find missing fields.
70 
   */
71 
  public List<String> getMissingFields() {
72 
    return Collections.unmodifiableList(missingFields);
73 
  }
74 
 
75 
  /**
76 
   * Converts this exception to an {@link InvalidProtocolBufferException}.
77 
   * When a parsed message is missing required fields, this should be thrown
78 
   * instead of {@code UninitializedMessageException}.
79 
   */
80 
  public InvalidProtocolBufferException asInvalidProtocolBufferException() {
81 
    return new InvalidProtocolBufferException(getMessage());
82 
  }
83 
 
84 
  /** Construct the description string for this exception. */
85 
  private static String buildDescription(final List<String> missingFields) {
86 
    final StringBuilder description =
87 
      new StringBuilder("Message missing required fields: ");
88 
    boolean first = true;
89 
    for (final String field : missingFields) {
90 
      if (first) {
91 
        first = false;
92 
      } else {
93 
        description.append(", ");
94 
      }
95 
      description.append(field);
96 
    }
97 
    return description.toString();
98 
  }
99 
}