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//
// OptionDetails.cs
//
// Author: Rafael Teixeira (rafaelteixeirabr@hotmail.com)
//
// (C) 2002 Rafael Teixeira
//
using System;
using System.Collections;
using System.IO;
using System.Reflection;
namespace Mono.GetOptions
{
public enum WhatToDoNext
{
AbandonProgram,
GoAhead
}
internal enum OptionProcessingResult
{
NotThisOption,
OptionAlone,
OptionConsumedParameter
}
internal class OptionDetails : IComparable
{
public string ShortForm;
public string LongForm;
public string AlternateForm;
public string ShortDescription;
public bool NeedsParameter;
public int MaxOccurs; // negative means there is no limit
public int Occurs;
public bool BooleanOption;
public Options OptionBundle;
public MemberInfo MemberInfo;
public ArrayList Values;
public System.Type ParameterType;
public string paramName = null;
public string ParamName
{
get
{
if (paramName == null)
{
int whereBegins = ShortDescription.IndexOf("{");
if (whereBegins < 0)
paramName = "PARAM";
else
{
int whereEnds = ShortDescription.IndexOf("}");
if (whereEnds < whereBegins)
whereEnds = ShortDescription.Length+1;
paramName = ShortDescription.Substring(whereBegins + 1, whereEnds - whereBegins - 1);
ShortDescription =
ShortDescription.Substring(0, whereBegins) +
paramName +
ShortDescription.Substring(whereEnds + 1);
}
}
return paramName;
}
}
public static bool Verbose = false;
public override string ToString()
{
string optionHelp;
// TODO: Yet not that good
string shortPrefix;
string longPrefix;
bool hasLongForm = (this.LongForm != null && this.LongForm != string.Empty);
if(this.OptionBundle.ParsingMode == Mono.GetOptions.OptionsParsingMode.Windows)
{
shortPrefix = "/";
longPrefix = "/";
}
else
{
shortPrefix = "-";
longPrefix = "--";
}
optionHelp = " ";
optionHelp += (this.ShortForm != string.Empty) ? shortPrefix+this.ShortForm+" " : " ";
optionHelp += hasLongForm ? longPrefix+this.LongForm : "";
if (NeedsParameter)
{
if (hasLongForm)
optionHelp += ":";
optionHelp += ParamName;
}
optionHelp = optionHelp.PadRight(32) + " ";
optionHelp += this.ShortDescription;
if (this.AlternateForm != string.Empty && this.AlternateForm != null)
optionHelp += " [/"+this.AlternateForm + "]";
return optionHelp;
}
private static System.Type TypeOfMember(MemberInfo memberInfo)
{
if ((memberInfo.MemberType == MemberTypes.Field && memberInfo is FieldInfo))
return ((FieldInfo)memberInfo).FieldType;
if ((memberInfo.MemberType == MemberTypes.Property && memberInfo is PropertyInfo))
return ((PropertyInfo)memberInfo).PropertyType;
if ((memberInfo.MemberType == MemberTypes.Method && memberInfo is MethodInfo))
{
if (((MethodInfo)memberInfo).ReturnType.FullName != typeof(WhatToDoNext).FullName)
throw new NotSupportedException("Option method must return '" + typeof(WhatToDoNext).FullName + "'");
ParameterInfo[] parameters = ((MethodInfo)memberInfo).GetParameters();
if ((parameters == null) || (parameters.Length == 0))
return null;
else
return parameters[0].ParameterType;
}
throw new NotSupportedException("'" + memberInfo.MemberType + "' memberType is not supported");
}
public OptionDetails(MemberInfo memberInfo, OptionAttribute option, Options optionBundle)
{
this.ShortForm = ("" + option.ShortForm).Trim();
this.LongForm = (option.LongForm == string.Empty)? memberInfo.Name:option.LongForm;
this.AlternateForm = option.AlternateForm;
this.ShortDescription = option.ShortDescription;
this.Occurs = 0;
this.OptionBundle = optionBundle;
this.BooleanOption = false;
this.MemberInfo = memberInfo;
this.NeedsParameter = false;
this.Values = null;
this.MaxOccurs = 1;
this.ParameterType = TypeOfMember(memberInfo);
if (this.ParameterType != null)
{
if (this.ParameterType.FullName != "System.Boolean")
{
if (this.LongForm.IndexOf(':') >= 0)
throw new InvalidOperationException("Options with an embedded colon (':') in their visible name must be boolean!!! [" +
this.MemberInfo.ToString() + " isn't]");
this.NeedsParameter = true;
if (option.MaxOccurs != 1)
{
if (this.ParameterType.IsArray)
{
this.Values = new ArrayList();
this.MaxOccurs = option.MaxOccurs;
}
else
{
if (this.MemberInfo is MethodInfo || this.MemberInfo is PropertyInfo)
this.MaxOccurs = option.MaxOccurs;
else
throw new InvalidOperationException("MaxOccurs set to non default value (" + option.MaxOccurs + ") for a [" +
this.MemberInfo.ToString() + "] option");
}
}
}
else
{
this.BooleanOption = true;
if (option.MaxOccurs != 1)
{
if (this.MemberInfo is MethodInfo || this.MemberInfo is PropertyInfo)
this.MaxOccurs = option.MaxOccurs;
else
throw new InvalidOperationException("MaxOccurs set to non default value (" + option.MaxOccurs + ") for a [" +
this.MemberInfo.ToString() + "] option");
}
}
}
}
internal string Key
{
get { return this.ShortForm + this.LongForm; }
}
int IComparable.CompareTo(object other)
{
return Key.CompareTo(((OptionDetails)other).Key);
}
public void TransferValues()
{
if (Values != null)
{
if (MemberInfo is FieldInfo)
{
((FieldInfo)MemberInfo).SetValue(OptionBundle, Values.ToArray(ParameterType.GetElementType()));
return;
}
if (MemberInfo is PropertyInfo)
{
((PropertyInfo)MemberInfo).SetValue(OptionBundle, Values.ToArray(ParameterType.GetElementType()), null);
return;
}
if ((WhatToDoNext)((MethodInfo)MemberInfo).Invoke(OptionBundle, new object[] { Values.ToArray(ParameterType.GetElementType()) }) == WhatToDoNext.AbandonProgram)
System.Environment.Exit(1);
}
}
private void Occurred(int howMany)
{
Occurs += howMany;
if (MaxOccurs > 0 && Occurs > MaxOccurs)
throw new IndexOutOfRangeException("Option " + ShortForm + " can be used at most " + MaxOccurs + " times");
}
private void DoIt(bool setValue)
{
if (!NeedsParameter)
{
Occurred(1);
if (Verbose)
Console.WriteLine("<" + this.LongForm + "> set to [true]");
if (MemberInfo is FieldInfo)
{
((FieldInfo)MemberInfo).SetValue(OptionBundle, setValue);
return;
}
if (MemberInfo is PropertyInfo)
{
((PropertyInfo)MemberInfo).SetValue(OptionBundle, setValue, null);
return;
}
if ((WhatToDoNext)((MethodInfo)MemberInfo).Invoke(OptionBundle, null) == WhatToDoNext.AbandonProgram)
System.Environment.Exit(1);
return;
}
}
private void DoIt(string parameterValue)
{
if (parameterValue == null)
parameterValue = "";
string[] parameterValues = parameterValue.Split(',');
Occurred(parameterValues.Length);
foreach (string parameter in parameterValues)
{
object convertedParameter = null;
if (Verbose)
Console.WriteLine("<" + this.LongForm + "> set to [" + parameter + "]");
if (Values != null && parameter != null)
{
convertedParameter = Convert.ChangeType(parameter, ParameterType.GetElementType());
Values.Add(convertedParameter);
continue;
}
if (parameter != null)
convertedParameter = Convert.ChangeType(parameter, ParameterType);
if (MemberInfo is FieldInfo)
{
((FieldInfo)MemberInfo).SetValue(OptionBundle, convertedParameter);
continue;
}
if (MemberInfo is PropertyInfo)
{
((PropertyInfo)MemberInfo).SetValue(OptionBundle, convertedParameter, null);
continue;
}
if ((WhatToDoNext)((MethodInfo)MemberInfo).Invoke(OptionBundle, new object[] { convertedParameter }) == WhatToDoNext.AbandonProgram)
System.Environment.Exit(1);
}
}
private bool IsThisOption(string arg)
{
if (arg != null && arg != string.Empty)
{
arg = arg.TrimStart('-', '/');
return (arg == ShortForm || arg == LongForm || arg == AlternateForm);
}
return false;
}
public OptionProcessingResult ProcessArgument(string arg, string nextArg)
{
if (IsThisOption(arg))
{
if (!NeedsParameter)
{
DoIt(true); // in preparation for vbc-like booleans
return OptionProcessingResult.OptionAlone;
}
else
{
DoIt(nextArg);
return OptionProcessingResult.OptionConsumedParameter;
}
}
if (IsThisOption(arg + ":" + nextArg))
{
DoIt(true);
return OptionProcessingResult.OptionConsumedParameter;
}
return OptionProcessingResult.NotThisOption;
}
}
}
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