/// <summary>
/// Equality function that properly handles arrays,
/// lists, maps, lists of arrays, and maps of arrays.
/// </summary>
/// <remarks>
/// <para>
/// NOTE: For Sets, this relies on the equals method
/// of the Set to do the right thing. This is a reasonable
/// assumption since, in order for Sets to behave
/// properly as Sets, their values must already have
/// a proper implementation of equals. (Or they must
/// be specialized Sets that define a custom comparator that
/// knows how to do the right thing). The same holds true for Map keys.
/// Map values, on the other hand, are compared (so Map values
/// can be arrays).
/// </para>
/// </remarks>
/// <param name="o1">The first object. May be null.</param>
/// <param name="o2">The second object. May be null.</param>
/// <returns>true iff the two objects are equal.</returns>
public new static bool Equals(Object o1, Object o2)
{
if (o1 == o2)
{ //same object or both null
return(true);
}
else if (o1 == null)
{
return(false);
}
else if (o2 == null)
{
return(false);
}
else if (o1 is Array)
{
Type clazz1 = o1.GetType();
Type clazz2 = o2.GetType();
if (!clazz1.Equals(clazz2))
{
return(false);
}
Array array1 = (Array)o1;
Array array2 = (Array)o2;
int length1 = array1.Length;
int length2 = array2.Length;
if (length1 != length2)
{
return(false);
}
for (int i = 0; i < length1; i++)
{
Object el1 = array1.GetValue(i);
Object el2 = array2.GetValue(i);
if (!CollectionUtil.Equals(el1, el2))
{
return(false);
}
}
return(true);
}
else if (ReflectionUtil.IsParentTypeOf(typeof(IList <>), o1.GetType()))
{
Type parent1 = ReflectionUtil.FindInHierarchyOf(typeof(IList <>), o1.GetType());
Type parent2 = ReflectionUtil.FindInHierarchyOf(typeof(IList <>), o2.GetType());
if (!parent1.Equals(parent2))
{
return(false);
}
Type[] genericArguments =
parent1.GetGenericArguments();
Type collectionUtil = typeof(CollectionUtil);
MethodInfo info = collectionUtil.GetMethod("ListsEqual");
info = info.MakeGenericMethod(genericArguments);
Object rv = info.Invoke(null, new object[] { o1, o2 });
return((bool)rv);
}
else if (ReflectionUtil.IsParentTypeOf(typeof(IDictionary <,>), o1.GetType()))
{
Type parent1 = ReflectionUtil.FindInHierarchyOf(typeof(IDictionary <,>), o1.GetType());
Type parent2 = ReflectionUtil.FindInHierarchyOf(typeof(IDictionary <,>), o2.GetType());
if (!parent1.Equals(parent2))
{
return(false);
}
Type[] genericArguments =
parent1.GetGenericArguments();
Type collectionUtil = typeof(CollectionUtil);
MethodInfo info = collectionUtil.GetMethod("DictionariesEqual");
info = info.MakeGenericMethod(genericArguments);
Object rv = info.Invoke(null, new object[] { o1, o2 });
return((bool)rv);
}
else if (ReflectionUtil.IsParentTypeOf(typeof(ICollection <>), o1.GetType()))
{
Type parent1 = ReflectionUtil.FindInHierarchyOf(typeof(ICollection <>), o1.GetType());
Type parent2 = ReflectionUtil.FindInHierarchyOf(typeof(ICollection <>), o2.GetType());
if (!parent1.Equals(parent2))
{
return(false);
}
Type[] genericArguments =
parent1.GetGenericArguments();
Type collectionUtil = typeof(CollectionUtil);
MethodInfo info = collectionUtil.GetMethod("SetsEqual");
info = info.MakeGenericMethod(genericArguments);
Object rv = info.Invoke(null, new object[] { o1, o2 });
return((bool)rv);
}
else
{
return(o1.Equals(o2));
}
}
/// <summary>
/// Returns the generic type definition corresponding to this type.
/// Will return the same type if this is already a generic type.
/// </summary>
/// <returns></returns>
public SafeType <T> GetTypeErasure()
{
return(SafeType <T> .ForRawType(ReflectionUtil.GetTypeErasure(RawType)));
}