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ASN1Sequence.javaAPI DocAndroid 1.5 API5594Wed May 06 22:41:06 BST 2009org.bouncycastle.asn1

ASN1Sequence

public abstract class ASN1Sequence extends ASN1Collection

Fields Summary
Constructors Summary
Methods Summary
public booleanequals(java.lang.Object o)

        if (o == this)
        {
            return true;
        }
        
        if (!(o instanceof DEREncodable))
        {
            return false;
        }

        DERObject      dObj = ((DEREncodable)o).getDERObject();
        
        if (!(dObj instanceof ASN1Sequence))
        {
            return false;
        }
        
        ASN1Sequence   other = (ASN1Sequence)dObj;

        if (this.size() != other.size())
        {
            return false;
        }

        Enumeration s1 = this.getObjects();
        Enumeration s2 = other.getObjects();

        while (s1.hasMoreElements())
        {
            Object  o1 = s1.nextElement();
            Object  o2 = s2.nextElement();

            if (o1 != null && o2 != null)
            {
                if (!o1.equals(o2))
                {
                    return false;
                }
            }
            else if (o1 == null && o2 == null)
            {
                continue;
            }
            else
            {
                return false;
            }
        }

        return true;
public static org.bouncycastle.asn1.ASN1SequencegetInstance(java.lang.Object obj)
return an ASN1Sequence from the given object.

param
obj the object we want converted.
exception
IllegalArgumentException if the object cannot be converted.

        if (obj == null || obj instanceof ASN1Sequence)
        {
            return (ASN1Sequence)obj;
        }

        throw new IllegalArgumentException("unknown object in getInstance");
public static org.bouncycastle.asn1.ASN1SequencegetInstance(ASN1TaggedObject obj, boolean explicit)
Return an ASN1 sequence 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 sequence - 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 sequences you really should 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.

        if (explicit)
        {
            if (!obj.isExplicit())
            {
                throw new IllegalArgumentException("object implicit - explicit expected.");
            }

            return (ASN1Sequence)obj.getObject();
        }
        else
        {
            //
            // constructed object which appears to be explicitly tagged
            // when it should be implicit means we have to add the
            // surrounding sequence.
            //
            if (obj.isExplicit())
            {
                if (obj instanceof BERTaggedObject)
                {
                    return new BERSequence(obj.getObject());
                }
                else
                {
                    return new DERSequence(obj.getObject());
                }
            }
            else
            {
                if (obj.getObject() instanceof ASN1Sequence)
                {
                    return (ASN1Sequence)obj.getObject();
                }
            }
        }

        throw new IllegalArgumentException(
                "unknown object in getInstanceFromTagged");