java

Java/Java源代码/codedemo/java/lang/instrument/FirstTransformer.java

@@ -0,0 +1,26 @@
+/**
+ * 
+ */
+package cn.aofeng.demo.java.lang.instrument;
+
+import java.lang.instrument.ClassFileTransformer;
+import java.lang.instrument.IllegalClassFormatException;
+import java.security.ProtectionDomain;
+
+import cn.aofeng.demo.util.LogUtil;
+
+/**
+ * 只输出问候语，不进行字节码修改的Class转换器。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+public class FirstTransformer implements ClassFileTransformer {
+
+    @Override
+    public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, 
+            ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException {
+        LogUtil.log(">>> %s", className);
+        return null;
+    }
+
+}