/// <summary>
/// Restores an ordinary value collection from the config node. The type can be compound.
/// </summary>
/// <remarks>This method never throws.</remarks>
/// <param name="node">The node to read the state from.</param>
/// <param name="instance">
/// The owner of the field. It can be <c>null</c> for the static fields.
/// </param>
void ReadOrdinaryFromConfig(ConfigNode node, object instance)
{
var value = fieldInfo.GetValue(instance);
if (isCompound)
{
var cfgNode = ConfigAccessor.GetNodeByPath(node, cfgPath);
if (cfgNode != null)
{
if (value == null)
{
// Try creating the instance using its default constructor.
if (fieldInfo.IsInitOnly)
{
DebugEx.Warning(
"Cannot assign to a NULL readonly compound field! Field is ignored: {0}.{1}",
fieldInfo.DeclaringType.FullName, fieldInfo.Name);
return;
}
try {
value = Activator.CreateInstance(fieldInfo.FieldType);
fieldInfo.SetValue(instance, value);
} catch (Exception ex) {
DebugEx.Error("Cannot restore field of type {0}: {1}", fieldInfo.FieldType, ex.Message);
}
}
DeserializeCompoundFieldsFromNode(cfgNode, value);
}
}
else
{
if (fieldInfo.IsInitOnly)
{
DebugEx.Warning("Cannot assign to a readonly field! Field is ignored: {0}.{1}",
fieldInfo.DeclaringType.FullName, fieldInfo.Name);
return;
}
var cfgValue = ConfigAccessor.GetValueByPath(node, cfgPath);
if (cfgValue != null)
{
try {
object fieldValue;
if (isCustomSimpleType)
{
// Prefer the existing instance of the field value when available.
fieldValue = value ?? Activator.CreateInstance(fieldInfo.FieldType);
((IPersistentField)fieldValue).ParseFromString(cfgValue);
}
else
{
fieldValue = simpleTypeProto.ParseFromString(cfgValue, fieldInfo.FieldType);
}
fieldInfo.SetValue(instance, fieldValue);
} catch (Exception ex) {
DebugEx.Error("Cannot parse value \"{0}\" as {1}: {2}",
cfgValue, fieldInfo.FieldType.FullName, ex.Message);
}
}
}
}
/// <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 field from a config node.</summary>
/// <param name="node">A node to read state from.</param>
/// <param name="instance">An owner of the field. Can be <c>null</c> for static fields.</param>
public void ReadFromConfig(ConfigNode node, object instance)
{
object value = null;
if (collectionFieldHandler != null)
{
value = collectionFieldHandler.DeserializeValues(node);
}
else
{
var cfgData = ordinaryFieldHandler.IsCompound()
? ConfigAccessor.GetNodeByPath(node, cfgPath) as object
: ConfigAccessor.GetValueByPath(node, cfgPath) as object;
if (cfgData != null)
{
value = ordinaryFieldHandler.DeserializeValue(cfgData);
}
}
if (value != null)
{
fieldInfo.SetValue(instance, value);
}
}
/// <summary>Reads field from a config node.</summary>
/// <param name="node">A node to read state from.</param>
/// <param name="instance">An owner of the field. Can be <c>null</c> for static fields.</param>
public void ReadFromConfig(ConfigNode node, object instance)
{
var value = fieldInfo.GetValue(instance);
if (collectionProto != null)
{
// For collection field use existing object and restore its items.
if (value == null)
{
Debug.LogWarningFormat("Skip reading collection field {0}.{1} due to it's not initalized",
fieldInfo.DeclaringType.FullName, fieldInfo.Name);
return;
}
collectionProto.ClearItems(value);
if (isCompound)
{
// For compound items read nodes and have them parsed.
var itemCfgs = ConfigAccessor.GetNodesByPath(node, cfgPath);
if (itemCfgs != null)
{
foreach (var itemCfg in itemCfgs)
{
var itemValue = Activator.CreateInstance(collectionProto.GetItemType());
DeserializeCompoundFieldsFromNode(itemCfg, itemValue);
collectionProto.AddItem(value, itemValue);
}
}
}
else
{
// For ordinary items read strings and have them parsed.
var itemCfgs = ConfigAccessor.GetValuesByPath(node, cfgPath);
if (itemCfgs != null)
{
foreach (var itemCfg in itemCfgs)
{
try {
object itemValue;
if (isCustomSimpleType)
{
itemValue = Activator.CreateInstance(collectionProto.GetItemType());
((IPersistentField)itemValue).ParseFromString(itemCfg);
}
else
{
itemValue = simpleTypeProto.ParseFromString(itemCfg, collectionProto.GetItemType());
}
collectionProto.AddItem(value, itemValue);
} catch (Exception ex) {
Debug.LogErrorFormat("Cannot parse value \"{0}\" as {1}: {2}",
itemCfgs, collectionProto.GetItemType().FullName, ex.Message);
}
}
}
}
}
else
{
// For ordinary field just restore value and assign it to the field.
if (isCompound)
{
if (value != null)
{
DeserializeCompoundFieldsFromNode(ConfigAccessor.GetNodeByPath(node, cfgPath), value);
}
else
{
Debug.LogWarningFormat("Skip reading compound field {0}.{1} due to it's not initalized",
fieldInfo.DeclaringType.FullName, fieldInfo.Name);
}
}
else
{
var cfgValue = ConfigAccessor.GetValueByPath(node, cfgPath);
if (cfgValue != null)
{
try {
object fieldValue;
if (isCustomSimpleType)
{
// Prefer the existing instance of the field value when available.
fieldValue = value ?? Activator.CreateInstance(fieldInfo.FieldType);
((IPersistentField)fieldValue).ParseFromString(cfgValue);
}
else
{
fieldValue = simpleTypeProto.ParseFromString(cfgValue, fieldInfo.FieldType);
}
fieldInfo.SetValue(instance, fieldValue);
} catch (Exception ex) {
Debug.LogErrorFormat("Cannot parse value \"{0}\" as {1}: {2}",
cfgValue, fieldInfo.FieldType.FullName, ex.Message);
}
}
}
}
}
