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//
// System.ComponentModel.AttributeCollection.cs
//
// Authors:
// Rodrigo Moya (rodrigo@ximian.com)
// Gonzalo Paniagua Javier (gonzalo@ximian.com)
//
// (C) 2002 Ximian, Inc. (http://www.ximian.com)
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections;
using System.Reflection;
using System.Runtime.InteropServices;
namespace System.ComponentModel
{
[ComVisible (true)]
public class AttributeCollection : ICollection
{
private ArrayList attrList = new ArrayList ();
public static readonly AttributeCollection Empty = new AttributeCollection ((ArrayList)null);
internal AttributeCollection (ArrayList attributes)
{
attrList = attributes;
}
public AttributeCollection (Attribute[] attributes)
{
if (attributes != null)
for (int i = 0; i < attributes.Length; i++)
attrList.Add (attributes[i]);
}
public bool Contains (Attribute attr)
{
Attribute at = this [attr.GetType ()];
if (at != null)
return attr.Equals (at);
else
return false;
}
public bool Contains (Attribute [] attributes)
{
if (attributes == null)
return true;
foreach (Attribute attr in attributes)
if (!Contains (attr))
return false;
return true;
}
public void CopyTo (Array array, int index)
{
attrList.CopyTo (array, index);
}
IEnumerator IEnumerable.GetEnumerator () {
return GetEnumerator ();
}
public IEnumerator GetEnumerator ()
{
return attrList.GetEnumerator ();
}
public bool Matches (Attribute attr)
{
foreach (Attribute a in attrList)
if (a.Match (attr))
return true;
return false;
}
public bool Matches (Attribute [] attributes)
{
foreach (Attribute a in attributes)
if (!(Matches (a)))
return false;
return true;
}
protected Attribute GetDefaultAttribute (Type attributeType)
{
Attribute attr = null;
BindingFlags bf = BindingFlags.Public | BindingFlags.Static;
FieldInfo def = attributeType.GetField ("Default", bf);
if (def == null) {
ConstructorInfo constructorInfo = attributeType.GetConstructor (Type.EmptyTypes);
if (constructorInfo != null)
attr = constructorInfo.Invoke (null) as Attribute;
if (attr != null && !attr.IsDefaultAttribute ())
attr = null;
} else {
attr = (Attribute) def.GetValue (null);
}
return attr;
}
bool ICollection.IsSynchronized {
get {
return attrList.IsSynchronized;
}
}
object ICollection.SyncRoot {
get {
return attrList.SyncRoot;
}
}
int ICollection.Count {
get {
return Count;
}
}
public int Count {
get {
return attrList.Count;
}
}
public virtual Attribute this[Type type] {
get {
Attribute attr = null;
foreach (Attribute a in attrList) {
if (type.IsAssignableFrom (a.GetType ())) {
attr = a;
break;
}
}
if (attr == null)
attr = GetDefaultAttribute (type);
return attr;
}
}
public virtual Attribute this[int index] {
get {
return (Attribute) attrList [index];
}
}
}
}
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