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1
52
53 package com.go.trove.classfile;
54
55 import java.util.*;
56 import java.io.*;
57 import java.lang.reflect.Modifier  ;
58
59
68 public class FieldInfo {
69 private ClassFile mParent;
70 private ConstantPool mCp;
71
72 private String mName;
73 private TypeDescriptor mType;
74
75 private int mAccessFlags;
76
77 private ConstantUTFInfo mNameConstant;
78 private ConstantUTFInfo mDescriptorConstant;
79
80 private List mAttributes = new ArrayList(2);
81
82 private ConstantValueAttr mConstant;
83
84 FieldInfo(ClassFile parent,
85 AccessFlags flags,
86 String name,
87 TypeDescriptor type) {
88
89 mParent = parent;
90 mCp = parent.getConstantPool();
91 mName = name;
92 mType = type;
93
94 mAccessFlags = flags.getModifier();
95 mNameConstant = ConstantUTFInfo.make(mCp, name);
96 mDescriptorConstant = ConstantUTFInfo.make(mCp, type.toString());
97 }
98
99 private FieldInfo(ClassFile parent,
100 int flags,
101 ConstantUTFInfo nameConstant,
102 ConstantUTFInfo descConstant) {
103
104 mParent = parent;
105 mCp = parent.getConstantPool();
106 mName = nameConstant.getValue();
107 mType = TypeDescriptor.parseTypeDesc(descConstant.getValue());
108
109 mAccessFlags = flags;
110 mNameConstant = nameConstant;
111 mDescriptorConstant = descConstant;
112 }
113
114
117 public ClassFile getClassFile() {
118 return mParent;
119 }
120
121
124 public String getName() {
125 return mName;
126 }
127
128
131 public TypeDescriptor getType() {
132 return mType;
133 }
134
135
138 public AccessFlags getAccessFlags() {
139 return new AccessFlags(mAccessFlags);
140 }
141
142
145 public ConstantUTFInfo getNameConstant() {
146 return mNameConstant;
147 }
148
149
154 public ConstantUTFInfo getDescriptorConstant() {
155 return mDescriptorConstant;
156 }
157
158
161 public ConstantInfo getConstantValue() {
162 if (mConstant == null) {
163 return null;
164 }
165 else {
166 return mConstant.getConstant();
167 }
168 }
169
170 public boolean isSynthetic() {
171 for (int i = mAttributes.size(); --i >= 0; ) {
172 Object obj = mAttributes.get(i);
173 if (obj instanceof SyntheticAttr) {
174 return true;
175 }
176 }
177 return false;
178 }
179
180 public boolean isDeprecated() {
181 for (int i = mAttributes.size(); --i >= 0; ) {
182 Object obj = mAttributes.get(i);
183 if (obj instanceof DeprecatedAttr) {
184 return true;
185 }
186 }
187 return false;
188 }
189
190
193 public void setConstantValue(int value) {
194 addAttribute(new ConstantValueAttr
195 (mCp, ConstantIntegerInfo.make(mCp, value)));
196 }
197
198
201 public void setConstantValue(float value) {
202 addAttribute(new ConstantValueAttr
203 (mCp, ConstantFloatInfo.make(mCp, value)));
204 }
205
206
209 public void setConstantValue(long value) {
210 addAttribute(new ConstantValueAttr
211 (mCp, ConstantLongInfo.make(mCp, value)));
212 }
213
214
217 public void setConstantValue(double value) {
218 addAttribute(new ConstantValueAttr
219 (mCp, ConstantDoubleInfo.make(mCp, value)));
220 }
221
222
225 public void setConstantValue(String value) {
226 addAttribute(new ConstantValueAttr
227 (mCp, ConstantStringInfo.make(mCp, value)));
228 }
229
230
233 public void markSynthetic() {
234 addAttribute(new SyntheticAttr(mCp));
235 }
236
237
240 public void markDeprecated() {
241 addAttribute(new DeprecatedAttr(mCp));
242 }
243
244 public void addAttribute(Attribute attr) {
245 if (attr instanceof ConstantValueAttr) {
246 if (mConstant != null) {
247 mAttributes.remove(mConstant);
248 }
249 mConstant = (ConstantValueAttr)attr;
250 }
251
252 mAttributes.add(attr);
253 }
254
255 public Attribute[] getAttributes() {
256 Attribute[] attrs = new Attribute[mAttributes.size()];
257 return (Attribute[])mAttributes.toArray(attrs);
258 }
259
260
263 public int getLength() {
264 int length = 8;
265
266 int size = mAttributes.size();
267 for (int i=0; i<size; i++) {
268 length += ((Attribute)mAttributes.get(i)).getLength();
269 }
270
271 return length;
272 }
273
274 public void writeTo(DataOutput dout) throws IOException {
275 dout.writeShort(mAccessFlags);
276 dout.writeShort(mNameConstant.getIndex());
277 dout.writeShort(mDescriptorConstant.getIndex());
278
279 int size = mAttributes.size();
280 dout.writeShort(size);
281 for (int i=0; i<size; i++) {
282 Attribute attr = (Attribute)mAttributes.get(i);
283 attr.writeTo(dout);
284 }
285 }
286
287 public String toString() {
288 String modStr = Modifier.toString(mAccessFlags);
289 if (modStr.length() == 0) {
290 return String.valueOf(mType) + ' ' + getName();
291 }
292 else {
293 return modStr + ' ' + mType + ' ' + getName();
294 }
295 }
296
297 static FieldInfo readFrom(ClassFile parent,
298 DataInput din,
299 AttributeFactory attrFactory)
300 throws IOException
301 {
302 ConstantPool cp = parent.getConstantPool();
303
304 int flags = din.readUnsignedShort();
305 int index = din.readUnsignedShort();
306 ConstantUTFInfo nameConstant = (ConstantUTFInfo)cp.getConstant(index);
307 index = din.readUnsignedShort();
308 ConstantUTFInfo descConstant = (ConstantUTFInfo)cp.getConstant(index);
309
310 FieldInfo info = new FieldInfo(parent, flags,
311 nameConstant, descConstant);
312
313 int size = din.readUnsignedShort();
315 for (int i=0; i<size; i++) {
316 info.addAttribute(Attribute.readFrom(cp, din, attrFactory));
317 }
318
319 return info;
320 }
321 }
322 |
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