asn1taggedobject.java

java 文件下载器。可自定义

// Decompiled by Jad v1.5.8e2. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://kpdus.tripod.com/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi space 
// Source File Name:   ASN1TaggedObject.java

package org.bouncycastle.asn1;

import java.io.IOException;

// Referenced classes of package org.bouncycastle.asn1:
//			ASN1Object, ASN1Choice, ASN1OctetString, ASN1Sequence, 
//			ASN1Set, ASN1TaggedObjectParser, DEREncodable, DERObject, 
//			DEROutputStream

public abstract class ASN1TaggedObject extends ASN1Object
	implements ASN1TaggedObjectParser
{

	int tagNo;
	boolean empty;
	boolean explicit;
	DEREncodable obj;

	public static ASN1TaggedObject getInstance(ASN1TaggedObject obj, boolean explicit)
	{
		if (explicit)
			return (ASN1TaggedObject)obj.getObject();
		else
			throw new IllegalArgumentException("implicitly tagged tagged object");
	}

	public static ASN1TaggedObject getInstance(Object obj)
	{
		if (obj == null || (obj instanceof ASN1TaggedObject))
			return (ASN1TaggedObject)obj;
		else
			throw new IllegalArgumentException("unknown object in getInstance");
	}

	public ASN1TaggedObject(int tagNo, DEREncodable obj)
	{
		empty = false;
		explicit = true;
		this.obj = null;
		explicit = true;
		this.tagNo = tagNo;
		this.obj = obj;
	}

	public ASN1TaggedObject(boolean explicit, int tagNo, DEREncodable obj)
	{
		empty = false;
		this.explicit = true;
		this.obj = null;
		if (obj instanceof ASN1Choice)
			this.explicit = true;
		else
			this.explicit = explicit;
		this.tagNo = tagNo;
		this.obj = obj;
	}

	boolean asn1Equals(DERObject o)
	{
		if (!(o instanceof ASN1TaggedObject))
			return false;
		ASN1TaggedObject other = (ASN1TaggedObject)o;
		if (tagNo != other.tagNo || empty != other.empty || explicit != other.explicit)
			return false;
		if (obj == null)
		{
			if (other.obj != null)
				return false;
		} else
		if (!obj.getDERObject().equals(other.obj.getDERObject()))
			return false;
		return true;
	}

	public int hashCode()
	{
		int code = tagNo;
		if (obj != null)
			code ^= obj.hashCode();
		return code;
	}

	public int getTagNo()
	{
		return tagNo;
	}

	public boolean isExplicit()
	{
		return explicit;
	}

	public boolean isEmpty()
	{
		return empty;
	}

	public DERObject getObject()
	{
		if (obj != null)
			return obj.getDERObject();
		else
			return null;
	}

	public DEREncodable getObjectParser(int tag, boolean isExplicit)
	{
		switch (tag)
		{
		case 17: // '\021'
			return ASN1Set.getInstance(this, isExplicit).parser();

		case 16: // '\020'
			return ASN1Sequence.getInstance(this, isExplicit).parser();

		case 4: // '\004'
			return ASN1OctetString.getInstance(this, isExplicit).parser();
		}
		if (isExplicit)
			return getObject();
		else
			throw new RuntimeException((new StringBuilder()).append("implicit tagging not implemented for tag: ").append(tag).toString());
	}

	abstract void encode(DEROutputStream deroutputstream)
		throws IOException;

	public String toString()
	{
		return (new StringBuilder()).append("[").append(tagNo).append("]").append(obj).toString();
	}
}