/// <param name="persistentField">A persitent field descriptor.</param>
/// <param name="valueType">A type to handle. If field is a collection then this type is a type of
/// the collection's item.</param>
/// <param name="simpleTypeProtoType">A proto that handles (de)serializing (in)to a simple string.
/// if this proto cannot handle <paramref name="valueType"/> then the type will be attempted to be
/// handled as a complex type.</param>
internal OrdinaryFieldHandler(
PersistentField persistentField, Type valueType, Type simpleTypeProtoType)
{
this.persistentField = persistentField;
this.valueType = valueType;
this.simpleTypeProto = Activator.CreateInstance(simpleTypeProtoType)
as AbstractOrdinaryValueTypeProto;
}
/// <param name="fieldInfo">An annotated field metadata.</param>
/// <param name="fieldAttr">An annotation of the field.</param>
public PersistentField(FieldInfo fieldInfo, PersistentFieldAttribute fieldAttr)
{
this.fieldInfo = fieldInfo;
cfgPath = fieldAttr.path;
var ordinaryType = fieldInfo.FieldType;
if (fieldAttr.collectionTypeProto != null)
{
collectionProto =
Activator.CreateInstance(fieldAttr.collectionTypeProto, new[] { fieldInfo.FieldType })
as AbstractCollectionTypeProto;
ordinaryType = collectionProto.GetItemType();
}
simpleTypeProto =
Activator.CreateInstance(fieldAttr.ordinaryTypeProto)
as AbstractOrdinaryValueTypeProto;
isCustomSimpleType = typeof(IPersistentField).IsAssignableFrom(ordinaryType);
// Determine if field's or collection item's type is a class (compound type).
isCompound = !simpleTypeProto.CanHandle(ordinaryType) && !isCustomSimpleType &&
(ordinaryType.IsValueType && !ordinaryType.IsEnum || // IsStruct
ordinaryType.IsClass && ordinaryType != typeof(string) &&
!ordinaryType.IsEnum); // IsClass
if (!isCompound && !simpleTypeProto.CanHandle(ordinaryType) && !isCustomSimpleType)
{
Debug.LogErrorFormat(
"Proto {0} cannot handle value in field {1}.{2}",
ordinaryType.FullName, fieldInfo.DeclaringType.FullName, fieldInfo.Name);
isDisabled = true;
}
// For a compound type retrieve all its persisted fields.
if (isCompound && !isDisabled)
{
// Ignore static fields of the compound type since it can be used by multiple persistent
// fields or as an item in a collection field.
// Also, ignore groups in the compound types to reduce configuration complexity.
compoundTypeFields =
PersistentFieldsFactory.GetPersistentFields(
ordinaryType, false /* needStatic */, true /* needInstance */, null /* group */)
// Parent nodes have to be handled before children!
.OrderBy(x => string.Join("/", x.cfgPath))
.ToArray();
// Disable if cannot deal with the field anyways.
if (compoundTypeFields.Length == 0 && !typeof(IConfigNode).IsAssignableFrom(ordinaryType))
{
Debug.LogErrorFormat(
"Compound type in field {0}.{1} has no persistent fields and doesn't implement"
+ " IConfigNode",
fieldInfo.DeclaringType.FullName, fieldInfo.Name);
isDisabled = true;
}
}
}
/// <summary>
/// Stores a value of arbitrary type <typeparamref name="T"/> into a config node.
/// </summary>
/// <param name="node">A node to set data in.</param>
/// <param name="pathKeys">An array of values that makes the full path. First node in the array is
/// the top most component of the path.</param>
/// <param name="value">A value to store. The <paramref name="typeProto"/> handler must know how
/// to convert value's type into string.</param>
/// <param name="typeProto">A proto capable to handle the type of <paramref name="value"/>. If not
/// set then <see cref="StandardOrdinaryTypesProto"/> is used.</param>
/// <typeparam name="T">The value type to store. Type proto must be able to handle it.
/// </typeparam>
/// <exception cref="ArgumentException">If type cannot be handled by the proto.</exception>
public static void SetValueByPath <T>(ConfigNode node, string[] pathKeys, T value,
AbstractOrdinaryValueTypeProto typeProto = null)
{
if (typeProto == null)
{
typeProto = standardTypesProto;
}
if (!typeProto.CanHandle(typeof(T)))
{
throw new ArgumentException(string.Format(
"Proto {0} cannot handle type {1}", typeProto.GetType(), typeof(T)));
}
var strValue = typeProto.SerializeToString(value);
SetValueByPath(node, pathKeys, strValue);
}
/// <summary>
/// Reads a value of an arbitrary type <typeparamref name="T"/> from the config node.
/// </summary>
/// <param name="node">The node to read data from.</param>
/// <param name="pathKeys">
/// The array of values that makes the full path. The first node in the array is the top most
/// component of the path.
/// </param>
/// <param name="typeProto">
/// A proto that can parse values of type <typeparamref name="T"/>. If not set, then
/// <see cref="StandardOrdinaryTypesProto"/> is used.
/// </param>
/// <returns>The parsed value or <c>null</c> if not found.</returns>
/// <typeparam name="T">
/// The value type to write. The <paramref name="typeProto"/> instance must be able to handle it.
/// </typeparam>
/// <exception cref="ArgumentException">If type cannot be handled by the proto.</exception>
/// <seealso cref="SetValueByPath<T>(ConfigNode, string[], T, KSPDev.ConfigUtils.AbstractOrdinaryValueTypeProto)"/>
public static T?GetValueByPath <T>(
ConfigNode node, string[] pathKeys, AbstractOrdinaryValueTypeProto typeProto = null)
where T : struct
{
if (typeProto == null)
{
typeProto = standardTypesProto;
}
if (!typeProto.CanHandle(typeof(T)))
{
throw new ArgumentException(string.Format(
"Proto {0} cannot handle type {1}", typeProto.GetType(), typeof(T)));
}
var strValue = ConfigAccessor.GetValueByPath(node, pathKeys);
return(strValue == null
? null
: (T?)typeProto.ParseFromString(strValue, typeof(T)));
}
/// <summary>
/// Reads a value of arbitrary type <typeparamref name="T"/> from a config node.
/// </summary>
/// <param name="node">A node to read data from.</param>
/// <param name="pathKeys">An array of values that makes the full path. First node in the array is
/// the top most component of the path.</param>
/// <param name="value">A variable to read value into. The <paramref name="typeProto"/> handler
/// must know how to convert value's type from string.</param>
/// <param name="typeProto">A proto capable to handle the type of <paramref name="value"/>. If not
/// set then <see cref="StandardOrdinaryTypesProto"/> is used.</param>
/// <returns><c>true</c> if value was successfully read and stored.</returns>
/// <typeparam name="T">The value type to read. Type proto must be able to handle it.
/// </typeparam>
/// <exception cref="ArgumentException">If type cannot be handled by the proto.</exception>
public static bool GetValueByPath <T>(ConfigNode node, string[] pathKeys, ref T value,
AbstractOrdinaryValueTypeProto typeProto = null)
{
if (typeProto == null)
{
typeProto = standardTypesProto;
}
if (!typeProto.CanHandle(typeof(T)))
{
throw new ArgumentException(string.Format(
"Proto {0} cannot handle type {1}", typeProto.GetType(), typeof(T)));
}
var strValue = GetValueByPath(node, pathKeys);
if (strValue == null)
{
return(false);
}
value = (T)typeProto.ParseFromString(strValue, typeof(T));
return(true);
}
/// <summary>
/// Reads a value of arbitrary type <typeparamref name="T"/> from a config node.
/// </summary>
/// <param name="node">A node to read data from.</param>
/// <param name="path">A string path to the node. Path components should be separated by '/'
/// symbol.</param>
/// <param name="value">A variable to read value into. The <paramref name="typeProto"/> handler
/// must know how to convert value's type from string.</param>
/// <param name="typeProto">A proto capable to handle the type of <paramref name="value"/>. If not
/// set then <see cref="StandardOrdinaryTypesProto"/> is used.</param>
/// <returns><c>true</c> if value was successfully read and stored.</returns>
/// <typeparam name="T">The value type to read. Type proto must be able to handle it.
/// </typeparam>
/// <exception cref="ArgumentException">If type cannot be handled by the proto.</exception>
public static bool GetValueByPath <T>(ConfigNode node, string path, ref T value,
AbstractOrdinaryValueTypeProto typeProto = null)
{
return(GetValueByPath(node, path.Split('/'), ref value, typeProto));
}
/// <summary>
/// Stores a value of arbitrary type <typeparamref name="T"/> into a config node.
/// </summary>
/// <param name="node">A node to set data in.</param>
/// <param name="path">A string path to the node. Path components should be separated by '/'
/// symbol.</param>
/// <param name="value">A value to store. The <paramref name="typeProto"/> handler must know how
/// to convert the value into string.</param>
/// <param name="typeProto">A proto capable to handle the type of <paramref name="value"/>. If not
/// set then <see cref="StandardOrdinaryTypesProto"/> is used.</param>
/// <typeparam name="T">The value type to store. Type proto must be able to handle it.
/// </typeparam>
/// <exception cref="ArgumentException">If type cannot be handled by the proto.</exception>
public static void SetValueByPath <T>(ConfigNode node, string path, T value,
AbstractOrdinaryValueTypeProto typeProto = null)
{
SetValueByPath(node, path.Split('/'), value, typeProto);
}
/// <summary>
/// Reads a value of an arbitrary type <typeparamref name="T"/> from the config node.
/// </summary>
/// <param name="node">The node to read data from.</param>
/// <param name="path">
/// The path to the node. The path components should be separated by '/' symbol.
/// </param>
/// <param name="typeProto">
/// A proto that can parse values of type <typeparamref name="T"/>. If not set, then
/// <see cref="StandardOrdinaryTypesProto"/> is used.
/// </param>
/// <returns>The parsed value or <c>null</c> if not found.</returns>
/// <typeparam name="T">
/// The value type to write. The <paramref name="typeProto"/> instance must be able to handle it.
/// </typeparam>
/// <exception cref="ArgumentException">If type cannot be handled by the proto.</exception>
/// <seealso cref="SetValueByPath<T>(ConfigNode, string, T, KSPDev.ConfigUtils.AbstractOrdinaryValueTypeProto)"/>
public static T?GetValueByPath <T>(
ConfigNode node, string path, AbstractOrdinaryValueTypeProto typeProto = null)
where T : struct
{
return(GetValueByPath <T>(node, ConfigAccessor.StrToPath(path), typeProto));
}
