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25 
26 package jdk.jfr.internal;
27 
28 import jdk.internal.org.objectweb.asm.commons.Method;
29 import jdk.jfr.internal.EventInstrumentation.FieldInfo;
30 
31 public enum EventWriterMethod {
32 
33     BEGIN_EVENT("(" + jdk.internal.org.objectweb.asm.Type.getType(PlatformEventType.class).getDescriptor() + ")Z", "???", "beginEvent"),
34     END_EVENT("()Z", "???", "endEvent"),
35     PUT_BYTE("(B)V", "byte", "putByte"),
36     PUT_SHORT("(S)V", "short", "putShort"),
37     PUT_INT("(I)V", "int", "putInt"),
38     PUT_LONG("(J)V", "long", "putLong"),
39     PUT_FLOAT("(F)V", "float", "putFloat"),
40     PUT_DOUBLE("(D)V", "double", "putDouble"),
41     PUT_CHAR("(C)V", "char", "putChar"),
42     PUT_BOOLEAN("(Z)V", "boolean", "putBoolean"),
43     PUT_THREAD("(Ljava/lang/Thread;)V", Type.THREAD.getName(), "putThread"),
44     PUT_CLASS("(Ljava/lang/Class;)V", Type.CLASS.getName(), "putClass"),
45     PUT_STRING("(Ljava/lang/String;Ljdk/jfr/internal/StringPool;)V", Type.STRING.getName(), "putString"),
46     PUT_EVENT_THREAD("()V", Type.THREAD.getName(), "putEventThread"),
47     PUT_STACK_TRACE("()V", Type.TYPES_PREFIX + "StackTrace", "putStackTrace");
48 
49     private final Method asmMethod;
50     private final String typeDescriptor;
51 
EventWriterMethod(String paramSignature, String typeName, String methodName)52     EventWriterMethod(String paramSignature, String typeName, String methodName) {
53         this.typeDescriptor = ASMToolkit.getDescriptor(typeName);
54         this.asmMethod = new Method(methodName, paramSignature);
55     }
56 
asASM()57     public Method asASM() {
58         return asmMethod;
59     }
60 
61     /**
62      * Return method in {@link EventWriter} class to use when writing event of
63      * a certain type.
64      *
65      * @param v field info
66      *
67      * @return the method
68      */
lookupMethod(FieldInfo v)69     public static EventWriterMethod lookupMethod(FieldInfo v) {
70         // event thread
71         if (v.fieldName.equals(EventInstrumentation.FIELD_EVENT_THREAD)) {
72             return EventWriterMethod.PUT_EVENT_THREAD;
73         }
74         for (EventWriterMethod m : EventWriterMethod.values()) {
75             if (v.fieldDescriptor.equals(m.typeDescriptor)) {
76                 return m;
77             }
78         }
79         throw new Error("Unknown type " + v.fieldDescriptor);
80     }
81 }
82