VerificationTypeInfo


1   package com.yworks.yguard.obf.classfile;
2   
3   import java.io.DataInput  ;
4   import java.io.DataOutput  ;
5   
6   /**
7    * Representation of an VerificationTypeInfo struct 
8    */
9   public class VerificationTypeInfo {
10    private int u2_cPoolIndex;
11    private int u2_offset;
12    private int u1_tag;
13    // Constants -------------------------------------------------------------
14  
15    // Class Methods ---------------------------------------------------------
16  
17    public static VerificationTypeInfo create(DataInput   din) throws java.io.IOException   {
18      if (din == null) throw new NullPointerException  ("DataInput cannot be null!");
19      VerificationTypeInfo vti = new VerificationTypeInfo();
20      vti.read(din);
21      return vti;
22    }
23  
24  
25    // Instance Methods ------------------------------------------------------
26    private VerificationTypeInfo() {
27    }
28  
29    /** Check for Utf8 references to constant pool and mark them. */
30    protected void markUtf8Refs(ConstantPool pool) {
31      switch (u1_tag) {
32        case 0: //ITEM_Top;
33          break;
34        case 1: //ITEM_Integer;
35          break;
36        case 2: //ITEM_Float;
37          break;
38        case 3: //ITEM_Double;
39          break;
40        case 4: //ITEM_Long;
41          break;
42        case 5: //ITEM_Null;
43          break;
44        case 6: //ITEM_UninitializedThis;
45          break;
46        case 7: //ITEM_Object;
47          break;
48        case 8: //ITEM_Uninitialized;
49          break;
50        default:
51          throw new IllegalArgumentException  ("Unkown tag " + u1_tag);
52      }
53    }
54  
55    private void read(DataInput   din) throws java.io.IOException   {
56      u2_cPoolIndex = -1;
57      u1_tag = din.readUnsignedByte();
58      switch (u1_tag) {
59        case 0: //ITEM_Top;
60          break;
61        case 1: //ITEM_Integer;
62          break;
63        case 2: //ITEM_Float;
64          break;
65        case 3: //ITEM_Double;
66          break;
67        case 4: //ITEM_Long;
68          break;
69        case 5: //ITEM_Null;
70          break;
71        case 6: //ITEM_UninitializedThis;
72          break;
73        case 7: //ITEM_Object;
74          u2_cPoolIndex = din.readUnsignedShort();
75          break;
76        case 8: //ITEM_Uninitialized;
77          u2_offset = din.readUnsignedShort();
78          break;
79        default:
80          throw new IllegalArgumentException  ("Unkown tag " + u1_tag);
81      }
82    }
83  
84    /** Export the representation to a DataOutput stream. */
85    public void write(DataOutput   dout) throws java.io.IOException   {
86      dout.writeByte(u1_tag);
87      switch (u1_tag) {
88        case 0: //ITEM_Top;
89          break;
90        case 1: //ITEM_Integer;
91          break;
92        case 2: //ITEM_Float;
93          break;
94        case 3: //ITEM_Double;
95          break;
96        case 4: //ITEM_Long;
97          break;
98        case 5: //ITEM_Null;
99          break;
100       case 6: //ITEM_UninitializedThis;
101         break;
102       case 7: //ITEM_Object;
103         dout.writeShort(u2_cPoolIndex);
104         break;
105       case 8: //ITEM_Uninitialized;
106         dout.writeShort(u2_offset);
107         break;
108       default:
109         throw new IllegalArgumentException  ("Unkown tag " + u1_tag);
110     }
111   }
112 }
113
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