public ComponentGroupArrayStaticCache(Type type, EntityManager entityManager, ComponentSystemBase system = null)
{
var fields = type.GetFields(BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public);
var componentFieldOffsetsBuilder = new List <int>();
var componentTypesBuilder = new List <ComponentType>();
var componentDataFieldOffsetsBuilder = new List <int>();
var componentDataTypesBuilder = new List <ComponentType>();
var subtractiveComponentTypesBuilder = new List <ComponentType>();
foreach (var field in fields)
{
var fieldType = field.FieldType;
var offset = UnsafeUtility.GetFieldOffset(field);
if (fieldType.IsPointer)
{
var isReadOnly = field.GetCustomAttributes(typeof(ReadOnlyAttribute), true).Length != 0;
var accessMode = isReadOnly ? ComponentType.AccessMode.ReadOnly : ComponentType.AccessMode.ReadWrite;
var elementType = fieldType.GetElementType();
#if ENABLE_UNITY_COLLECTIONS_CHECKS
if (!typeof(IComponentData).IsAssignableFrom(elementType) && elementType != typeof(Entity))
{
throw new ArgumentException($"{type}.{field.Name} is a pointer type but not a IComponentData. Only IComponentData or Entity may be a pointer type for enumeration.");
}
#endif
componentDataFieldOffsetsBuilder.Add(offset);
componentDataTypesBuilder.Add(new ComponentType(elementType, accessMode));
}
else if (fieldType.IsSubclassOf(TypeManager.UnityEngineComponentType))
{
componentFieldOffsetsBuilder.Add(offset);
componentTypesBuilder.Add(fieldType);
}
else if (fieldType.IsGenericType && fieldType.GetGenericTypeDefinition() == typeof(SubtractiveComponent <>))
{
subtractiveComponentTypesBuilder.Add(ComponentType.Subtractive(fieldType.GetGenericArguments()[0]));
}
#if ENABLE_UNITY_COLLECTIONS_CHECKS
else if (typeof(IComponentData).IsAssignableFrom(fieldType))
{
throw new ArgumentException($"{type}.{field.Name} must be an unsafe pointer to the {fieldType}. Like this: {fieldType}* {field.Name};");
}
else
{
throw new ArgumentException($"{type}.{field.Name} can not be used in a component enumerator");
}
#endif
}
#if ENABLE_UNITY_COLLECTIONS_CHECKS
if (componentTypesBuilder.Count + componentDataTypesBuilder.Count > ComponentGroupArrayData.kMaxStream)
{
throw new ArgumentException($"{type} has too many component references. A ComponentGroup Array can have up to {ComponentGroupArrayData.kMaxStream}.");
}
#endif
ComponentDataCount = componentDataTypesBuilder.Count;
ComponentCount = componentTypesBuilder.Count;
componentDataTypesBuilder.AddRange(componentTypesBuilder);
componentDataTypesBuilder.AddRange(subtractiveComponentTypesBuilder);
ComponentTypes = componentDataTypesBuilder.ToArray();
componentDataFieldOffsetsBuilder.AddRange(componentFieldOffsetsBuilder);
ComponentFieldOffsets = componentDataFieldOffsetsBuilder.ToArray();
if (system != null)
{
ComponentGroup = system.GetComponentGroup(ComponentTypes);
SafetyManager = entityManager.ComponentJobSafetyManager;
}
else
{
ComponentGroup = entityManager.CreateComponentGroup(ComponentTypes);
SafetyManager = entityManager.ComponentJobSafetyManager;
}
CachedType = type;
}
