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using System;
using System.Collections.Generic;
namespace Org.BouncyCastle.Asn1.Cms
{
public class AttributeTable
{
private readonly Dictionary<DerObjectIdentifier, object> m_attributes;
public AttributeTable(IDictionary<DerObjectIdentifier, object> attrs)
{
m_attributes = new Dictionary<DerObjectIdentifier, object>(attrs);
}
public AttributeTable(Asn1EncodableVector v)
{
m_attributes = BuildAttributes(v);
}
public AttributeTable(Asn1Set s)
{
m_attributes = BuildAttributes(s);
}
public AttributeTable(Attributes attrs)
: this(Asn1Set.GetInstance(attrs.ToAsn1Object()))
{
}
/// <summary>Return the first attribute matching the given OBJECT IDENTIFIER</summary>
public Attribute this[DerObjectIdentifier oid]
{
get
{
if (!m_attributes.TryGetValue(oid, out object existingValue))
return null;
if (existingValue is List<Attribute> existingList)
return existingList[0];
if (existingValue is Attribute existingAttr)
return existingAttr;
throw new InvalidOperationException();
}
}
/**
* 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();
if (m_attributes.TryGetValue(oid, out object existingValue))
{
if (existingValue is List<Attribute> existingList)
{
foreach (var attr in existingList)
{
v.Add(attr);
}
}
else if (existingValue is Attribute existingAttr)
{
v.Add(existingAttr);
}
else
{
throw new InvalidOperationException();
}
}
return v;
}
public int Count
{
get
{
int total = 0;
foreach (object existingValue in m_attributes.Values)
{
if (existingValue is List<Attribute> existingList)
{
total += existingList.Count;
}
else if (existingValue is Attribute existingAttr)
{
++total;
}
else
{
throw new InvalidOperationException();
}
}
return total;
}
}
public IDictionary<DerObjectIdentifier, object> ToDictionary()
{
return new Dictionary<DerObjectIdentifier, object>(m_attributes);
}
public Asn1EncodableVector ToAsn1EncodableVector()
{
Asn1EncodableVector v = new Asn1EncodableVector();
foreach (object existingValue in m_attributes.Values)
{
if (existingValue is List<Attribute> existingList)
{
foreach (Attribute existingAttr in existingList)
{
v.Add(existingAttr);
}
}
else if (existingValue is Attribute existingAttr)
{
v.Add(existingAttr);
}
else
{
throw new InvalidOperationException();
}
}
return v;
}
public Attributes ToAttributes()
{
return new Attributes(ToAsn1EncodableVector());
}
public AttributeTable Add(params Attribute[] attributes)
{
if (attributes == null || attributes.Length < 1)
return this;
var result = new AttributeTable(m_attributes);
foreach (Attribute attribute in attributes)
{
AddAttribute(result.m_attributes, attribute);
}
return result;
}
/**
* Return a new table with the passed in attribute added.
*
* @param attrType
* @param attrValue
* @return
*/
public AttributeTable Add(DerObjectIdentifier attrType, Asn1Encodable attrValue)
{
AttributeTable result = new AttributeTable(m_attributes);
AddAttribute(result.m_attributes, new Attribute(attrType, new DerSet(attrValue)));
return result;
}
public AttributeTable Remove(DerObjectIdentifier attrType)
{
if (!m_attributes.ContainsKey(attrType))
return this;
AttributeTable result = new AttributeTable(m_attributes);
result.m_attributes.Remove(attrType);
return result;
}
private static void AddAttribute(Dictionary<DerObjectIdentifier, object> attributes, Attribute a)
{
DerObjectIdentifier oid = a.AttrType;
if (!attributes.TryGetValue(oid, out object existingValue))
{
attributes[oid] = a;
return;
}
if (existingValue is List<Attribute> existingList)
{
existingList.Add(a);
return;
}
if (existingValue is Attribute existingAttr)
{
var newList = new List<Attribute>();
newList.Add(existingAttr);
newList.Add(a);
attributes[oid] = newList;
return;
}
throw new InvalidOperationException();
}
private static Dictionary<DerObjectIdentifier, object> BuildAttributes(IEnumerable<Asn1Encodable> e)
{
var result = new Dictionary<DerObjectIdentifier, object>();
foreach (Asn1Encodable element in e)
{
AddAttribute(result, Attribute.GetInstance(element));
}
return result;
}
}
}
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