package org.bouncycastle.asn1;
// BEGIN android-removed
//import java.io.ByteArrayOutputStream;
//import java.io.IOException;
// END android-removed
import java.util.Enumeration;
// BEGIN android-removed
//import java.util.Vector;
// END android-removed;
// BEGIN android-note
// Changed inheritence of class.
// END android-note
abstract public class ASN1Set
extends ASN1Collection
{
// BEGIN android-removed
//protected Vector set = new Vector();
// END android-removed
/**
* return an ASN1Set from the given object.
*
* @param obj the object we want converted.
* @exception IllegalArgumentException if the object cannot be converted.
*/
public static ASN1Set getInstance(
Object obj)
{
if (obj == null || obj instanceof ASN1Set)
{
return (ASN1Set)obj;
}
throw new IllegalArgumentException("unknown object in getInstance");
}
/**
* Return an ASN1 set from a tagged object. There is a special
* case here, if an object appears to have been explicitly tagged on
* reading but we were expecting it to be implictly tagged in the
* normal course of events it indicates that we lost the surrounding
* set - so we need to add it back (this will happen if the tagged
* object is a sequence that contains other sequences). If you are
* dealing with implicitly tagged sets you really <b>should</b>
* be using this method.
*
* @param obj the tagged object.
* @param explicit true if the object is meant to be explicitly tagged
* false otherwise.
* @exception IllegalArgumentException if the tagged object cannot
* be converted.
*/
public static ASN1Set getInstance(
ASN1TaggedObject obj,
boolean explicit)
{
if (explicit)
{
if (!obj.isExplicit())
{
throw new IllegalArgumentException("object implicit - explicit expected.");
}
return (ASN1Set)obj.getObject();
}
else
{
//
// constructed object which appears to be explicitly tagged
// and it's really implicit means we have to add the
// surrounding sequence.
//
if (obj.isExplicit())
{
ASN1Set set = new DERSet(obj.getObject());
return set;
}
else
{
if (obj.getObject() instanceof ASN1Set)
{
return (ASN1Set)obj.getObject();
}
//
// in this case the parser returns a sequence, convert it
// into a set.
//
ASN1EncodableVector v = new ASN1EncodableVector();
if (obj.getObject() instanceof ASN1Sequence)
{
ASN1Sequence s = (ASN1Sequence)obj.getObject();
Enumeration e = s.getObjects();
while (e.hasMoreElements())
{
v.add((DEREncodable)e.nextElement());
}
return new DERSet(v, false);
}
}
}
throw new IllegalArgumentException(
"unknown object in getInstanceFromTagged");
}
public ASN1Set()
{
}
// BEGIN android-removed
//public Enumeration getObjects()
//{
// return set.elements();
//}
///**
// * return the object at the set postion indicated by index.
// *
// * @param index the set number (starting at zero) of the object
// * @return the object at the set postion indicated by index.
// */
//public DEREncodable getObjectAt(
// int index)
//{
// return (DEREncodable)set.elementAt(index);
//}
///**
// * return the number of objects in this set.
// *
// * @return the number of objects in this set.
// */
//public int size()
//{
// return set.size();
//}
//public int hashCode()
//{
// Enumeration e = this.getObjects();
// int hashCode = 0;
// while (e.hasMoreElements())
// {
// hashCode ^= e.nextElement().hashCode();
// }
// return hashCode;
//}
// END android-removed
public boolean equals(
Object o)
{
if (o == this)
{
return true;
}
if (!(o instanceof DEREncodable))
{
return false;
}
DERObject dObj = ((DEREncodable)o).getDERObject();
if (!(dObj instanceof ASN1Set))
{
return false;
}
ASN1Set other = (ASN1Set)dObj;
if (this.size() != other.size())
{
return false;
}
Enumeration s1 = this.getObjects();
Enumeration s2 = other.getObjects();
while (s1.hasMoreElements())
{
if (!s1.nextElement().equals(s2.nextElement()))
{
return false;
}
}
return true;
}
// BEGIN android-removed
///**
// * return true if a <= b (arrays are assumed padded with zeros).
// */
//private boolean lessThanOrEqual(
// byte[] a,
// byte[] b)
//{
// if (a.length <= b.length)
// {
// for (int i = 0; i != a.length; i++)
// {
// int l = a[i] & 0xff;
// int r = b[i] & 0xff;
//
// if (r > l)
// {
// return true;
// }
// else if (l > r)
// {
// return false;
// }
// }
// return true;
// }
// else
// {
// for (int i = 0; i != b.length; i++)
// {
// int l = a[i] & 0xff;
// int r = b[i] & 0xff;
//
// if (r > l)
// {
// return true;
// }
// else if (l > r)
// {
// return false;
// }
// }
// return false;
// }
//}
//private byte[] getEncoded(
// DEREncodable obj)
//{
// ByteArrayOutputStream bOut = new ByteArrayOutputStream();
// ASN1OutputStream aOut = new ASN1OutputStream(bOut);
// try
// {
// aOut.writeObject(obj);
// }
// catch (IOException e)
// {
// throw new IllegalArgumentException("cannot encode object added to SET");
// }
// return bOut.toByteArray();
//}
//protected void sort()
//{
// if (set.size() > 1)
// {
// boolean swapped = true;
// while (swapped)
// {
// int index = 0;
// byte[] a = getEncoded((DEREncodable)set.elementAt(0));
//
// swapped = false;
//
// while (index != set.size() - 1)
// {
// byte[] b = getEncoded((DEREncodable)set.elementAt(index + 1));
// if (lessThanOrEqual(a, b))
// {
// a = b;
// }
// else
// {
// Object o = set.elementAt(index);
// set.setElementAt(set.elementAt(index + 1), index);
// set.setElementAt(o, index + 1);
// swapped = true;
// }
// index++;
// }
// }
// }
//}
//protected void addObject(
// DEREncodable obj)
//{
// set.addElement(obj);
//}
//abstract void encode(DEROutputStream out)
// throws IOException;
//public String toString()
//{
// return set.toString();
//}
// END android-removed
}
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