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#region Copyright notice and license
// Protocol Buffers - Google's data interchange format
// Copyright 2016 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
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#endregion
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
namespace Google.Protobuf.WellKnownTypes
{
// Manually-written partial class for the FieldMask well-known type.
public partial class FieldMask : ICustomDiagnosticMessage
{
/// <summary>
/// Converts a timestamp specified in seconds/nanoseconds to a string.
/// </summary>
/// <remarks>
/// If the value is a normalized duration in the range described in <c>field_mask.proto</c>,
/// <paramref name="diagnosticOnly"/> is ignored. Otherwise, if the parameter is <c>true</c>,
/// a JSON object with a warning is returned; if it is <c>false</c>, an <see cref="InvalidOperationException"/> is thrown.
/// </remarks>
/// <param name="paths">Paths in the field mask</param>
/// <param name="diagnosticOnly">Determines the handling of non-normalized values</param>
/// <exception cref="InvalidOperationException">The represented field mask is invalid, and <paramref name="diagnosticOnly"/> is <c>false</c>.</exception>
internal static string ToJson(IList<string> paths, bool diagnosticOnly)
{
var firstInvalid = paths.FirstOrDefault(p => !ValidatePath(p));
if (firstInvalid == null)
{
var writer = new StringWriter();
#if NET35
var query = paths.Select(JsonFormatter.ToJsonName);
JsonFormatter.WriteString(writer, string.Join(",", query.ToArray()));
#else
JsonFormatter.WriteString(writer, string.Join(",", paths.Select(JsonFormatter.ToJsonName)));
#endif
return writer.ToString();
}
else
{
if (diagnosticOnly)
{
var writer = new StringWriter();
writer.Write("{ \"@warning\": \"Invalid FieldMask\", \"paths\": ");
JsonFormatter.Default.WriteList(writer, (IList)paths);
writer.Write(" }");
return writer.ToString();
}
else
{
throw new InvalidOperationException($"Invalid field mask to be converted to JSON: {firstInvalid}");
}
}
}
/// <summary>
/// Checks whether the given path is valid for a field mask.
/// </summary>
/// <returns>true if the path is valid; false otherwise</returns>
private static bool ValidatePath(string input)
{
for (int i = 0; i < input.Length; i++)
{
char c = input[i];
if (c >= 'A' && c <= 'Z')
{
return false;
}
if (c == '_' && i < input.Length - 1)
{
char next = input[i + 1];
if (next < 'a' || next > 'z')
{
return false;
}
}
}
return true;
}
/// <summary>
/// Returns a string representation of this <see cref="FieldMask"/> for diagnostic purposes.
/// </summary>
/// <remarks>
/// Normally the returned value will be a JSON string value (including leading and trailing quotes) but
/// when the value is non-normalized or out of range, a JSON object representation will be returned
/// instead, including a warning. This is to avoid exceptions being thrown when trying to
/// diagnose problems - the regular JSON formatter will still throw an exception for non-normalized
/// values.
/// </remarks>
/// <returns>A string representation of this value.</returns>
public string ToDiagnosticString()
{
return ToJson(Paths, true);
}
}
}
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