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Java > Open Source Codes > org > enhydra > oyster > der > DERClassContextSpecificPr


1 /*
2  * Title: Oyster Project
3  * Description: S/MIME email sending capabilities
4  * @Author Vladimir Radisic
5  * @Version 2.1.5
6  */
7
8 package org.enhydra.oyster.der;
9
10 import org.enhydra.oyster.exception.SMIMEException;
11
12 /**
13  * DERClassContextSpecificPr can be both, primitive or structured type of DER
14  * encoded object with the context-specific class tag (part of object Identifier
15  * Octet) in ASN.1 notation. Difference bettween DERClassContextSpecific and
16  * DERClassContextSpecificPr is that class DERClassContextSpecific has public
17  * method addContent. Also, DERClassContextSpecific extends it's super class
18  * DERClassContextSpecificPr.
19  */
20 public class DERClassContextSpecificPr extends DERObject {
21
22 /**
23  * Identifies if DERClassContextSpecificPr represents primitive or structured
24  * DER object.
25  */
26   private boolean structureIdentificator = false;
27
28 /**
29  * Counter for objects added to DERClassContextSpecificPr. Couldn't be more than
30  * 1 for primitive DERClassContextSpecificPr
31  */
32   private int countOfAddings = 0;
33
34 /**
35  * Constructs the structured or primitive DERClassContextSpecificPr object
36  * @param type0 define value of identifier octet
37  * @param structured0 used for defining structured complexity of Context Specific
38  * class (true = structured, and false = primitive)
39  * @exception SMIMEException thrown in super class constructor.
40  */
41   public DERClassContextSpecificPr (int type0, boolean structured0) throws SMIMEException
42   {
43     super(structured0 ? (type0 | 160) : (type0 | 128));
44     structureIdentificator = structured0;
45   }
46
47 /**
48  * Adds content to DER encoded Context Specific Class Type
49  * @param content0 content for adding to Context Specific Class Type
50  * @exception SMIMEException when adding content to primitive
51  * DERClassContextSpecificPr object is performed more than once, or thrown in
52  * super class method addContent.
53  */
54   protected void addContent (byte[] content0) throws SMIMEException {
55     if (structureIdentificator == false & countOfAddings > 0)
56       throw new SMIMEException(this, 1005);
57     super.addContent(content0);
58     countOfAddings++;
59   }
60 }
61
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