/// <summary>
/// Copyright 2010 Outercurve Foundation
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
/// http://www.apache.org/licenses/LICENSE-2.0
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
/// </summary>
/// <param name="value"></param>
/// <param name="result"></param>
/// <returns></returns>
public static bool TryParseVersionSpec(string value, out IVersionSpec result)
{
if (value == null)
{
throw new ArgumentNullException("value");
}
var versionSpec = new VersionSpec();
value = value.Trim();
// First, try to parse it as a plain version string
Version version;
if (Version.TryParse(value, out version))
{
// A plain version is treated as an inclusive minimum range
result = new VersionSpec
{
MinVersion = version,
IsMinInclusive = true
};
return true;
}
// It's not a plain version, so it must be using the bracket arithmetic range syntax
result = null;
// Fail early if the string is too short to be valid
if (value.Length < 3)
{
return false;
}
// The first character must be [ ot (
switch (value.First())
{
case '[':
versionSpec.IsMinInclusive = true;
break;
case '(':
versionSpec.IsMinInclusive = false;
break;
default:
return false;
}
// The last character must be ] ot )
switch (value.Last())
{
case ']':
versionSpec.IsMaxInclusive = true;
break;
case ')':
versionSpec.IsMaxInclusive = false;
break;
default:
return false;
}
// Get rid of the two brackets
value = value.Substring(1, value.Length - 2);
// Split by comma, and make sure we don't get more than two pieces
string[] parts = value.Split(',');
if (parts.Length > 2)
{
return false;
}
// If there is only one piece, we use it for both min and max
string minVersionString = parts[0];
string maxVersionString = (parts.Length == 2) ? parts[1] : parts[0];
// Only parse the min version if it's non-empty
if (!String.IsNullOrWhiteSpace(minVersionString))
{
if (!Version.TryParse(minVersionString, out version))
{
return false;
}
versionSpec.MinVersion = version;
}
// Same deal for max
if (!String.IsNullOrWhiteSpace(maxVersionString))
{
if (!Version.TryParse(maxVersionString, out version))
{
return false;
}
versionSpec.MaxVersion = version;
}
// Successful parse!
result = versionSpec;
return true;
}
/// <summary>
/// Copyright 2010 Outercurve Foundation
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
/// http://www.apache.org/licenses/LICENSE-2.0
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
/// </summary>
/// <param name="value"></param>
/// <param name="result"></param>
/// <returns></returns>
public static bool TryParseVersionSpec(string value, out IVersionSpec result)
{
if (value == null)
{
throw new ArgumentNullException("value");
}
var versionSpec = new VersionSpec();
value = value.Trim();
// First, try to parse it as a plain version string
Version version;
if (Version.TryParse(value, out version))
{
// A plain version is treated as an inclusive minimum range
result = new VersionSpec
{
MinVersion = version,
IsMinInclusive = true
};
return(true);
}
// It's not a plain version, so it must be using the bracket arithmetic range syntax
result = null;
// Fail early if the string is too short to be valid
if (value.Length < 3)
{
return(false);
}
// The first character must be [ ot (
switch (value.First())
{
case '[':
versionSpec.IsMinInclusive = true;
break;
case '(':
versionSpec.IsMinInclusive = false;
break;
default:
return(false);
}
// The last character must be ] ot )
switch (value.Last())
{
case ']':
versionSpec.IsMaxInclusive = true;
break;
case ')':
versionSpec.IsMaxInclusive = false;
break;
default:
return(false);
}
// Get rid of the two brackets
value = value.Substring(1, value.Length - 2);
// Split by comma, and make sure we don't get more than two pieces
string[] parts = value.Split(',');
if (parts.Length > 2)
{
return(false);
}
// If there is only one piece, we use it for both min and max
string minVersionString = parts[0];
string maxVersionString = (parts.Length == 2) ? parts[1] : parts[0];
// Only parse the min version if it's non-empty
if (!String.IsNullOrWhiteSpace(minVersionString))
{
if (!Version.TryParse(minVersionString, out version))
{
return(false);
}
versionSpec.MinVersion = version;
}
// Same deal for max
if (!String.IsNullOrWhiteSpace(maxVersionString))
{
if (!Version.TryParse(maxVersionString, out version))
{
return(false);
}
versionSpec.MaxVersion = version;
}
// Successful parse!
result = versionSpec;
return(true);
}
