/// <summary>
/// Parses a JSON-encoded array into a collection of objects created with the specified delegate.
/// </summary>
/// <param name="input">The JSON-encoded character array to parse.</param>
/// <param name="func">The delegate method used to create objects from the JSON array's contents.</param>
/// <returns>A list of decoded objects.</returns>
public static ArrayList ParseArrayToObjects(char[] input, ObjectCreationFunction func)
{
ArrayList result;
TryParseArrayToObjects(input, func, out result, true);
return(result);
}
private static bool TryParseArrayToObjects(char[] input, ObjectCreationFunction func, out ArrayList result, bool throwIfError)
{
int index = 0;
object obj;
bool success = TryParseArray(input, ref index, func, out obj);
result = obj as ArrayList;
if (throwIfError && (!success || result == null))
{
throw new Exception("JSON parse error at index " + index);
}
// Done
return(success);
}
/// <summary>
/// Attempts to parse a JSON-encoded array into a collection of objects created with the specified delegate.
/// </summary>
/// <param name="input">The JSON-encoded character array to parse.</param>
/// <param name="func">The delegate method used to create objects from the JSON array's contents.</param>
/// <param name="result">Returns the list of decoded objects.</param>
/// <returns>true if parsing was successful; otherwise, false.</returns>
public static bool TryParseArrayToObjects(char[] input, ObjectCreationFunction func, out ArrayList result)
{
return(TryParseArrayToObjects(input, func, out result, false));
}
/// <summary>
/// Attempts to parse a JSON array starting at the specified index.
/// </summary>
private static bool TryParseArray(char[] input, ref int index, ObjectCreationFunction func, out object result)
{
if (input[index++] != '[')
{
result = null;
return(false);
}
SkipWhitespace(input, ref index);
object value;
char c;
ArrayList arrayList = new ArrayList();
while (index < input.Length)
{
// Are we at the end of the array?
if (input[index] == ']')
{
index++;
result = arrayList;
return(true);
}
// Try to parse a value
if (!TryParseValue(input, ref index, out value))
{
break;
}
// Success, add it to the list
if (func == null)
{
arrayList.Add(value);
}
else
{
arrayList.Add(func(value));
}
// Skip ahead to the next non-whitespace character
SkipWhitespace(input, ref index);
if (index >= input.Length)
{
break;
}
c = input[index];
if (c == ']')
{
continue;
}
if (c == ',')
{
index++;
SkipWhitespace(input, ref index);
continue;
}
// Error: there should be a ',' or ']' after each value
break;
}
// An error occurred or we reached the end of the input stream before finishing
result = null;
return(false);
}
