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package org.bouncycastle.asn1;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
/**
* Base class for defining an ASN.1 object.
*/
public abstract class ASN1Object
implements ASN1Encodable
{
/**
* Return the default BER or DER encoding for this object.
*
* @return BER/DER byte encoded object.
* @throws java.io.IOException on encoding error.
*/
public byte[] getEncoded()
throws IOException
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
ASN1OutputStream aOut = new ASN1OutputStream(bOut);
aOut.writeObject(this);
return bOut.toByteArray();
}
/**
* Return either the default for "BER" or a DER encoding if "DER" is specified.
*
* @param encoding name of encoding to use.
* @return byte encoded object.
* @throws IOException on encoding error.
*/
public byte[] getEncoded(
String encoding)
throws IOException
{
if (encoding.equals(ASN1Encoding.DER))
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
DEROutputStream dOut = new DEROutputStream(bOut);
dOut.writeObject(this);
return bOut.toByteArray();
}
else if (encoding.equals(ASN1Encoding.DL))
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
DLOutputStream dOut = new DLOutputStream(bOut);
dOut.writeObject(this);
return bOut.toByteArray();
}
return this.getEncoded();
}
public int hashCode()
{
return this.toASN1Primitive().hashCode();
}
public boolean equals(
Object o)
{
if (this == o)
{
return true;
}
if (!(o instanceof ASN1Encodable))
{
return false;
}
ASN1Encodable other = (ASN1Encodable)o;
return this.toASN1Primitive().equals(other.toASN1Primitive());
}
/**
* @deprecated use toASN1Primitive()
* @return the underlying primitive type.
*/
public ASN1Primitive toASN1Object()
{
return this.toASN1Primitive();
}
/**
* Return true if obj is a byte array and represents an object with the given tag value.
*
* @param obj object of interest.
* @param tagValue tag value to check for.
* @return true if obj is a byte encoding starting with the given tag value, false otherwise.
*/
protected static boolean hasEncodedTagValue(Object obj, int tagValue)
{
return (obj instanceof byte[]) && ((byte[])obj)[0] == tagValue;
}
/**
* Method providing a primitive representation of this object suitable for encoding.
* @return a primitive representation of this object.
*/
public abstract ASN1Primitive toASN1Primitive();
}
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