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using System;
using System.Collections;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1.Cms
{
public class AttributeTable
{
private readonly IDictionary attributes;
#if !SILVERLIGHT
[Obsolete]
public AttributeTable(
Hashtable attrs)
{
this.attributes = Platform.CreateHashtable(attrs);
}
#endif
public AttributeTable(
IDictionary attrs)
{
this.attributes = Platform.CreateHashtable(attrs);
}
public AttributeTable(
Asn1EncodableVector v)
{
this.attributes = Platform.CreateHashtable(v.Count);
foreach (Asn1Encodable o in v)
{
Attribute a = Attribute.GetInstance(o);
AddAttribute(a);
}
}
public AttributeTable(
Asn1Set s)
{
this.attributes = Platform.CreateHashtable(s.Count);
for (int i = 0; i != s.Count; i++)
{
Attribute a = Attribute.GetInstance(s[i]);
AddAttribute(a);
}
}
public AttributeTable(
Attributes attrs)
: this(Asn1Set.GetInstance(attrs.ToAsn1Object()))
{
}
private void AddAttribute(
Attribute a)
{
DerObjectIdentifier oid = a.AttrType;
object obj = attributes[oid];
if (obj == null)
{
attributes[oid] = a;
}
else
{
IList v;
if (obj is Attribute)
{
v = Platform.CreateArrayList();
v.Add(obj);
v.Add(a);
}
else
{
v = (IList) obj;
v.Add(a);
}
attributes[oid] = v;
}
}
/// <summary>Return the first attribute matching the given OBJECT IDENTIFIER</summary>
public Attribute this[DerObjectIdentifier oid]
{
get
{
object obj = attributes[oid];
if (obj is IList)
{
return (Attribute)((IList)obj)[0];
}
return (Attribute) obj;
}
}
[Obsolete("Use 'object[oid]' syntax instead")]
public Attribute Get(
DerObjectIdentifier oid)
{
return this[oid];
}
/**
* Return all the attributes matching the OBJECT IDENTIFIER oid. The vector will be
* empty if there are no attributes of the required type present.
*
* @param oid type of attribute required.
* @return a vector of all the attributes found of type oid.
*/
public Asn1EncodableVector GetAll(
DerObjectIdentifier oid)
{
Asn1EncodableVector v = new Asn1EncodableVector();
object obj = attributes[oid];
if (obj is IList)
{
foreach (Attribute a in (IList)obj)
{
v.Add(a);
}
}
else if (obj != null)
{
v.Add((Attribute) obj);
}
return v;
}
public int Count
{
get
{
int total = 0;
foreach (object o in attributes.Values)
{
if (o is IList)
{
total += ((IList)o).Count;
}
else
{
++total;
}
}
return total;
}
}
public IDictionary ToDictionary()
{
return Platform.CreateHashtable(attributes);
}
#if !SILVERLIGHT
[Obsolete("Use 'ToDictionary' instead")]
public Hashtable ToHashtable()
{
return new Hashtable(attributes);
}
#endif
public Asn1EncodableVector ToAsn1EncodableVector()
{
Asn1EncodableVector v = new Asn1EncodableVector();
foreach (object obj in attributes.Values)
{
if (obj is IList)
{
foreach (object el in (IList)obj)
{
v.Add(Attribute.GetInstance(el));
}
}
else
{
v.Add(Attribute.GetInstance(obj));
}
}
return v;
}
public Attributes ToAttributes()
{
return new Attributes(this.ToAsn1EncodableVector());
}
/**
* Return a new table with the passed in attribute added.
*
* @param attrType
* @param attrValue
* @return
*/
public AttributeTable Add(DerObjectIdentifier attrType, Asn1Encodable attrValue)
{
AttributeTable newTable = new AttributeTable(attributes);
newTable.AddAttribute(new Attribute(attrType, new DerSet(attrValue)));
return newTable;
}
public AttributeTable Remove(DerObjectIdentifier attrType)
{
AttributeTable newTable = new AttributeTable(attributes);
newTable.attributes.Remove(attrType);
return newTable;
}
}
}
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