2 // System.ComponentModel.AttributeCollection.cs
5 // Rodrigo Moya (rodrigo@ximian.com)
6 // Gonzalo Paniagua Javier (gonzalo@ximian.com)
8 // (C) 2002 Ximian, Inc. (http://www.ximian.com)
12 // Permission is hereby granted, free of charge, to any person obtaining
13 // a copy of this software and associated documentation files (the
14 // "Software"), to deal in the Software without restriction, including
15 // without limitation the rights to use, copy, modify, merge, publish,
16 // distribute, sublicense, and/or sell copies of the Software, and to
17 // permit persons to whom the Software is furnished to do so, subject to
18 // the following conditions:
20 // The above copyright notice and this permission notice shall be
21 // included in all copies or substantial portions of the Software.
23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
33 using System.Collections;
34 using System.Reflection;
35 using System.Runtime.InteropServices;
37 namespace System.ComponentModel
40 public class AttributeCollection : ICollection
42 private ArrayList attrList = new ArrayList ();
43 public static readonly AttributeCollection Empty = new AttributeCollection ((ArrayList)null);
45 internal AttributeCollection (ArrayList attributes)
47 if (attributes != null)
48 attrList = attributes;
52 public AttributeCollection (params Attribute[] attributes)
54 public AttributeCollection (Attribute[] attributes)
57 if (attributes != null)
58 for (int i = 0; i < attributes.Length; i++)
59 attrList.Add (attributes[i]);
63 public static AttributeCollection FromExisting (AttributeCollection existing, params Attribute [] newAttributes)
66 throw new ArgumentNullException ("existing");
67 AttributeCollection ret = new AttributeCollection ();
68 ret.attrList.AddRange (existing.attrList);
69 if (newAttributes != null)
70 ret.attrList.AddRange (newAttributes);
75 public bool Contains (Attribute attr)
77 Attribute at = this [attr.GetType ()];
79 return attr.Equals (at);
84 public bool Contains (Attribute [] attributes)
86 if (attributes == null)
89 foreach (Attribute attr in attributes)
96 public void CopyTo (Array array, int index)
98 attrList.CopyTo (array, index);
101 IEnumerator IEnumerable.GetEnumerator () {
102 return GetEnumerator ();
105 public IEnumerator GetEnumerator ()
107 return attrList.GetEnumerator ();
110 public bool Matches (Attribute attr)
112 foreach (Attribute a in attrList)
118 public bool Matches (Attribute [] attributes)
120 foreach (Attribute a in attributes)
126 protected Attribute GetDefaultAttribute (Type attributeType)
128 Attribute attr = null;
129 BindingFlags bf = BindingFlags.Public | BindingFlags.Static;
131 FieldInfo def = attributeType.GetField ("Default", bf);
133 ConstructorInfo constructorInfo = attributeType.GetConstructor (Type.EmptyTypes);
134 if (constructorInfo != null)
135 attr = constructorInfo.Invoke (null) as Attribute;
136 if (attr != null && !attr.IsDefaultAttribute ())
139 attr = (Attribute) def.GetValue (null);
145 bool ICollection.IsSynchronized {
147 return attrList.IsSynchronized;
151 object ICollection.SyncRoot {
153 return attrList.SyncRoot;
157 int ICollection.Count {
165 return attrList != null ? attrList.Count : 0;
169 public virtual Attribute this[Type type] {
171 Attribute attr = null;
172 if (attrList != null) {
173 foreach (Attribute a in attrList) {
174 if (type.IsAssignableFrom (a.GetType ())) {
182 attr = GetDefaultAttribute (type);
188 public virtual Attribute this[int index] {
190 return (Attribute) attrList [index];