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1
50 package net.sf.just4log.transform;
51
52 import java.util.HashMap  ;
53
54 import org.apache.bcel.Constants;
55 import org.apache.bcel.generic.ConstantPoolGen;
56 import org.apache.bcel.generic.IFEQ;
57 import org.apache.bcel.generic.InstructionHandle;
58 import org.apache.bcel.generic.InstructionList;
59 import org.apache.bcel.generic.InvokeInstruction;
60 import org.apache.bcel.generic.MethodGen;
61 import org.apache.bcel.generic.ObjectType;
62 import org.apache.bcel.generic.PUSH;
63 import org.apache.bcel.generic.Type;
64 import org.apache.commons.logging.Log;
65 import org.apache.commons.logging.LogFactory;
66
67
70
71 public class LogJDK14Transform extends Transform {
72
73 private static final String INTERFACE = "java.util.logging.Logger";
74
77 private static final ObjectType logType = new ObjectType(INTERFACE);
78 public ObjectType getLogType() {
79 return logType;
80 }
81 private static final String LEVEL = "java.util.logging.Level";
82
83 private static final ObjectType LevelType = new ObjectType(LEVEL);
84 private static final ObjectType[] ARGUMENTS_ISENABLEDFOR =
85 new ObjectType[] { new ObjectType(LEVEL)};
86
87 private static Log logger = LogFactory.getLog(LogJDK14Transform.class);
88 private static String CLASSID =
89 "$Id: LogJDK14Transform.java,v 1.6 2003/07/23 21:19:12 lbruand Exp $";
90
91 public static void register() {
92 Transform.register(new LogJDK14Transform());
93 }
94
95
98 public LogJDK14Transform() {
99 super();
100 }
101
102
105 public InstructionHandle insertFork(
106 InstructionList il,
107 InstructionHandle getStaticHandle,
108 InstructionHandle invokeHandle,
109 ConstantPoolGen cp) {
110 String level =
111 getIsEnabled(
112 ((InvokeInstruction) invokeHandle.getInstruction()),
113 cp);
114 if (level == null) {
115 return null;
117 }
118 logger.info("the level of enabling is: " + level);
119 logger.info("Inserting GETSTATIC");
120 InstructionHandle insertHandle =
121 il.insert(getStaticHandle, getStaticHandle.getInstruction().copy());
122 il.insert(
123 getStaticHandle,
124 instFact.createGetStatic(LEVEL, level, LevelType));
125
126 logger.info("Inserting INVOKE call to isLoggable");
127
128 il.insert(
129 getStaticHandle,
130 instFact.createInvoke(
131 INTERFACE,
132 "isLoggable",
133 Type.BOOLEAN,
134 ARGUMENTS_ISENABLEDFOR,
135 Constants.INVOKEVIRTUAL));
136 logger.info("Inserting IFEQ");
137 il.insert(getStaticHandle, new IFEQ(invokeHandle.getNext()));
138 return insertHandle;
139 }
140 private static HashMap mapping = new HashMap ();
141 static {
142 mapping.put("finest", "FINEST");
143 mapping.put("finer", "FINER");
144 mapping.put("fine", "FINE");
145 mapping.put("config", "CONFIG");
146 mapping.put("info", "INFO");
147 mapping.put("warning", "WARNING");
148 mapping.put("severe", "SEVERE");
149 mapping.put("entering", "FINER");
150 mapping.put("exiting", "FINER");
151 mapping.put("throwing", "FINER");
152 }
153 public String getIsEnabled(
154 InvokeInstruction invokeInstruction,
155 ConstantPoolGen cp) {
156 return (String ) mapping.get(invokeInstruction.getMethodName(cp));
157 }
158
159 public String getClassname() {
160 return INTERFACE;
161 }
162
165 public InstructionHandle insertEnter(
166 MethodGen orig,
167 InstructionList il,
168 InstructionHandle firstInstructionHandle,
169 ConstantPoolGen cp) {
170 logger.info("Inserting Enter code.");
171 InstructionHandle backup = il.insert(
172 firstInstructionHandle,
173 instFact.createGetStatic(
174 clazz.getClassName(),
175 loggerAttribute.getName(),
176 loggerAttribute.getType()));
177
178
179 il.insert(firstInstructionHandle,
180 new PUSH(cp, clazz.getClassName())
181 );
182 il.insert(firstInstructionHandle,
183 new PUSH(cp, getMethodRepr(orig))
184 );
185
186
187 il.insert(
188 firstInstructionHandle,
189 instFact.createInvoke(
190 INTERFACE,
191 "entering",
192 Type.VOID,
193 new Type[] {Type.STRING, Type.STRING},
194 Constants.INVOKEVIRTUAL));
195
196 return backup;
197 }
198
199
202 public InstructionHandle insertExit(
203 MethodGen orig,
204 InstructionList il,
205 InstructionHandle returnInstructionHandle,
206 ConstantPoolGen cp) {
207 logger.info("Inserting Exit code.");
208 InstructionHandle backup = il.insert(
209 returnInstructionHandle,
210 instFact.createGetStatic(
211 clazz.getClassName(),
212 loggerAttribute.getName(),
213 loggerAttribute.getType()));
214
215
216
217 il.insert(returnInstructionHandle,
218 new PUSH(cp, clazz.getClassName())
219 );
220 il.insert(returnInstructionHandle,
221 new PUSH(cp, getMethodRepr(orig))
222 );
223
224 il.insert(
225 returnInstructionHandle,
226 instFact.createInvoke(
227 INTERFACE,
228 "exiting",
229 Type.VOID,
230 new Type[] {Type.STRING, Type.STRING},
231 Constants.INVOKEVIRTUAL));
232
233 return backup;
234 }
235
236 }
237 |
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