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1
7 package org.gjt.jclasslib.structures.elementvalues;
8
9 import org.gjt.jclasslib.structures.*;
10
11 import java.io.*;
12
13
19 public abstract class ElementValue extends AbstractStructure {
20
21 public final static char BYTE_TAG = 'B';
22 public final static char CHAR_TAG = 'C';
23 public final static char DOUBLE_TAG = 'D';
24 public final static char FLOAT_TAG = 'F';
25 public final static char INT_TAG = 'I';
26 public final static char LONG_TAG = 'J';
27 public final static char SHORT_TAG = 'S';
28 public final static char BOOL_TAG = 'Z';
29 public final static char STRING_TAG = 's';
30 public final static char ENUM_TAG = 'e';
31 public final static char CLASS_TAG = 'c';
32 public final static char ARRAY_TAG = '[';
33 public final static char ANNOTATION_TAG = '@';
34
35 public final static String  BYTE_TAG_VERBOSE = "byte";
36 public final static String CHAR_TAG_VERBOSE = "String";
37 public final static String DOUBLE_TAG_VERBOSE = "double";
38 public final static String FLOAT_TAG_VERBOSE = "float";
39 public final static String INT_TAG_VERBOSE = "int";
40 public final static String LONG_TAG_VERBOSE = "long";
41 public final static String SHORT_TAG_VERBOSE = "short";
42 public final static String BOOL_TAG_VERBOSE = "boolean";
43 public final static String STRING_TAG_VERBOSE = "String";
44 public final static String ENUM_TAG_VERBOSE = "Enum";
45 public final static String CLASS_TAG_VERBOSE = "Class";
46 public final static String ARRAY_TAG_VERBOSE = "Array";
47 public final static String ANNOTATION_TAG_VERBOSE = "Annotation";
48
49 protected static final int INITIAL_LENGTH = 1;
50 private int tag;
51
52 public ElementValue(int tag) {
53 this.tag = tag;
54 }
55
56
57
68 public static ElementValue create(DataInput in, ClassFile classFile)
69 throws InvalidByteCodeException, IOException {
70
71 int tagType = in.readUnsignedByte();
72
73 ElementValue entry = null;
74 switch (tagType) {
75 case BOOL_TAG:
76 case BYTE_TAG:
77 case CHAR_TAG:
78 case DOUBLE_TAG:
79 case FLOAT_TAG:
80 case SHORT_TAG:
81 case INT_TAG:
82 case LONG_TAG:
83 case STRING_TAG:
84 entry = new ConstElementValue(tagType);
85 break;
86 case ENUM_TAG:
87 entry = new EnumElementValue();
88 break;
89 case CLASS_TAG:
90 entry = new ClassElementValue();
91 break;
92 case ANNOTATION_TAG:
93 entry = new AnnotationElementValue();
94 break;
95 case ARRAY_TAG:
96 entry = new ArrayElementValue();
97 break;
98 default:
99 throw new InvalidByteCodeException("Unknown tag " + (char)tagType);
100 }
101 entry.setClassFile(classFile);
102 entry.read(in);
103
104 return entry;
105 }
106
107
108 public void write(DataOutput out) throws InvalidByteCodeException, IOException {
109 super.write(out);
110
111 out.writeByte(tag);
112
113 if (debug) debug("wrote ");
114 }
115
116
117 protected abstract int getSpecificLength();
118
119 final public int getLength() {
120 return INITIAL_LENGTH + getSpecificLength();
121 }
122
123 public abstract String getEntryName();
124
125 protected String printAccessFlagsVerbose(int accessFlags) {
126 if (accessFlags != 0)
127 throw new RuntimeException ("Access flags should be zero: " + Integer.toHexString(accessFlags));
128 return "";
129 }
130
131 public int getTag() {
132 return tag;
133 }
134
135 public static String getTagDescription(int tag) {
136 switch (tag) {
137 case BOOL_TAG:
138 return BOOL_TAG_VERBOSE;
139 case BYTE_TAG:
140 return BYTE_TAG_VERBOSE;
141 case CHAR_TAG:
142 return CHAR_TAG_VERBOSE;
143 case DOUBLE_TAG:
144 return DOUBLE_TAG_VERBOSE;
145 case FLOAT_TAG:
146 return FLOAT_TAG_VERBOSE;
147 case SHORT_TAG:
148 return SHORT_TAG_VERBOSE;
149 case INT_TAG:
150 return INT_TAG_VERBOSE;
151 case LONG_TAG:
152 return LONG_TAG_VERBOSE;
153 case STRING_TAG:
154 return STRING_TAG_VERBOSE;
155 case ENUM_TAG:
156 return ENUM_TAG_VERBOSE;
157 case CLASS_TAG:
158 return CLASS_TAG_VERBOSE;
159 case ANNOTATION_TAG:
160 return ANNOTATION_TAG_VERBOSE;
161 case ARRAY_TAG:
162 return ARRAY_TAG_VERBOSE;
163 default:
164 return "Unknown";
165 }
166 }
167
168
169 }
170 |
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