/** Prepares return value. */
public static void prepareReturnValue(
MethodVisitor mv, MethodSignatureVisitor msign, int varOffset) {
varOffset += msign.getAllArgumentsSize();
switch (msign.getReturnOpcodeType()) {
case 'V':
mv.visitInsn(ACONST_NULL);
break;
case 'B':
AsmUtil.valueOfByte(mv);
break;
case 'C':
AsmUtil.valueOfCharacter(mv);
break;
case 'S':
AsmUtil.valueOfShort(mv);
break;
case 'I':
AsmUtil.valueOfInteger(mv);
break;
case 'Z':
AsmUtil.valueOfBoolean(mv);
break;
case 'J':
AsmUtil.valueOfLong(mv);
break;
case 'F':
AsmUtil.valueOfFloat(mv);
break;
case 'D':
AsmUtil.valueOfDouble(mv);
break;
}
}
/** Stores one argument. Index is 1-based. No conversion occurs. */
public static void storeMethodArgument(
MethodVisitor mv, MethodSignatureVisitor msign, int index) {
int offset = msign.getArgumentOffset(index);
int type = msign.getArgumentOpcodeType(index);
switch (type) {
case 'V':
break;
case 'B':
case 'C':
case 'S':
case 'I':
case 'Z':
mv.visitVarInsn(ISTORE, offset);
break;
case 'J':
mv.visitVarInsn(LSTORE, offset);
break;
case 'F':
mv.visitVarInsn(FSTORE, offset);
break;
case 'D':
mv.visitVarInsn(DSTORE, offset);
break;
default:
mv.visitVarInsn(ASTORE, offset);
}
}
/** Validates argument index. */
public static void checkArgumentIndex(
MethodSignatureVisitor msign, int argIndex, Class<? extends ProxyAdvice> advice) {
if ((argIndex < 1) || (argIndex > msign.getArgumentsCount())) {
throw new ProxettaException(
"Invalid argument index: '" + argIndex + "' used in advice: " + advice.getName());
}
}
public static void loadMethodArgumentAsObject(
MethodVisitor mv, MethodSignatureVisitor msign, int index) {
int offset = msign.getArgumentOffset(index);
int type = msign.getArgumentOpcodeType(index);
switch (type) {
case 'V':
break;
case 'B':
mv.visitVarInsn(ILOAD, offset);
AsmUtil.valueOfByte(mv);
break;
case 'C':
mv.visitVarInsn(ILOAD, offset);
AsmUtil.valueOfCharacter(mv);
break;
case 'S':
mv.visitVarInsn(ILOAD, offset);
AsmUtil.valueOfShort(mv);
break;
case 'I':
mv.visitVarInsn(ILOAD, offset);
AsmUtil.valueOfInteger(mv);
break;
case 'Z':
mv.visitVarInsn(ILOAD, offset);
AsmUtil.valueOfBoolean(mv);
break;
case 'J':
mv.visitVarInsn(LLOAD, offset);
AsmUtil.valueOfLong(mv);
break;
case 'F':
mv.visitVarInsn(FLOAD, offset);
AsmUtil.valueOfFloat(mv);
break;
case 'D':
mv.visitVarInsn(DLOAD, offset);
AsmUtil.valueOfDouble(mv);
break;
default:
mv.visitVarInsn(ALOAD, offset);
}
}
public static void castToReturnType(MethodVisitor mv, MethodSignatureVisitor msign) {
final String returnType;
char returnOpcodeType = msign.getReturnOpcodeType();
switch (returnOpcodeType) {
case 'I':
returnType = AsmUtil.SIGNATURE_JAVA_LANG_INTEGER;
break;
case 'J':
returnType = AsmUtil.SIGNATURE_JAVA_LANG_LONG;
break;
case 'S':
returnType = AsmUtil.SIGNATURE_JAVA_LANG_SHORT;
break;
case 'B':
returnType = AsmUtil.SIGNATURE_JAVA_LANG_BYTE;
break;
case 'Z':
returnType = AsmUtil.SIGNATURE_JAVA_LANG_BOOLEAN;
break;
case 'F':
returnType = AsmUtil.SIGNATURE_JAVA_LANG_FLOAT;
break;
case 'D':
returnType = AsmUtil.SIGNATURE_JAVA_LANG_DOUBLE;
break;
case 'C':
returnType = AsmUtil.SIGNATURE_JAVA_LANG_CHARACTER;
break;
case '[':
returnType = msign.getReturnTypeName();
break;
default:
returnType = msign.getReturnType().replace('.', '/');
break;
}
mv.visitTypeInsn(CHECKCAST, returnType);
}
public static void loadMethodReturnClass(MethodVisitor mv, MethodSignatureVisitor msign) {
loadClass(mv, msign.getReturnOpcodeType(), msign.getReturnTypeName());
}
public static void loadMethodArgumentClass(
MethodVisitor mv, MethodSignatureVisitor msign, int index) {
loadClass(mv, msign.getArgumentOpcodeType(index), msign.getArgumentTypeName(index));
}
/** Visits return opcodes. */
public static void visitReturn(MethodVisitor mv, MethodSignatureVisitor msign, boolean isLast) {
switch (msign.getReturnOpcodeType()) {
case 'V':
if (isLast == true) {
mv.visitInsn(POP);
}
mv.visitInsn(RETURN);
break;
case 'B':
if (isLast == true) {
mv.visitInsn(DUP);
Label label = new Label();
mv.visitJumpInsn(IFNONNULL, label);
mv.visitInsn(POP);
mv.visitInsn(ICONST_0);
mv.visitInsn(IRETURN);
mv.visitLabel(label);
AsmUtil.byteValue(mv);
}
mv.visitInsn(IRETURN);
break;
case 'C':
if (isLast == true) {
mv.visitInsn(DUP);
Label label = new Label();
mv.visitJumpInsn(IFNONNULL, label);
mv.visitInsn(POP);
mv.visitInsn(ICONST_0);
mv.visitInsn(IRETURN);
mv.visitLabel(label);
AsmUtil.charValue(mv);
}
mv.visitInsn(IRETURN);
break;
case 'S':
if (isLast == true) {
mv.visitInsn(DUP);
Label label = new Label();
mv.visitJumpInsn(IFNONNULL, label);
mv.visitInsn(POP);
mv.visitInsn(ICONST_0);
mv.visitInsn(IRETURN);
mv.visitLabel(label);
AsmUtil.shortValue(mv);
}
mv.visitInsn(IRETURN);
break;
case 'I':
if (isLast == true) {
mv.visitInsn(DUP);
Label label = new Label();
mv.visitJumpInsn(IFNONNULL, label);
mv.visitInsn(POP);
mv.visitInsn(ICONST_0);
mv.visitInsn(IRETURN);
mv.visitLabel(label);
AsmUtil.intValue(mv);
}
mv.visitInsn(IRETURN);
break;
case 'Z':
if (isLast == true) {
mv.visitInsn(DUP);
Label label = new Label();
mv.visitJumpInsn(IFNONNULL, label);
mv.visitInsn(POP);
mv.visitInsn(ICONST_0);
mv.visitInsn(IRETURN);
mv.visitLabel(label);
AsmUtil.booleanValue(mv);
}
mv.visitInsn(IRETURN);
break;
case 'J':
if (isLast == true) {
mv.visitInsn(DUP);
Label label = new Label();
mv.visitJumpInsn(IFNONNULL, label);
mv.visitInsn(POP);
mv.visitInsn(LCONST_0);
mv.visitInsn(LRETURN);
mv.visitLabel(label);
AsmUtil.longValue(mv);
}
mv.visitInsn(LRETURN);
break;
case 'F':
if (isLast == true) {
mv.visitInsn(DUP);
Label label = new Label();
mv.visitJumpInsn(IFNONNULL, label);
mv.visitInsn(POP);
mv.visitInsn(FCONST_0);
mv.visitInsn(FRETURN);
mv.visitLabel(label);
AsmUtil.floatValue(mv);
}
mv.visitInsn(FRETURN);
break;
case 'D':
if (isLast == true) {
mv.visitInsn(DUP);
Label label = new Label();
mv.visitJumpInsn(IFNONNULL, label);
mv.visitInsn(POP);
mv.visitInsn(DCONST_0);
mv.visitInsn(DRETURN);
mv.visitLabel(label);
AsmUtil.doubleValue(mv);
}
mv.visitInsn(DRETURN);
break;
default:
mv.visitInsn(ARETURN);
break;
}
}
public static void storeMethodArgumentFromObject(
MethodVisitor mv, MethodSignatureVisitor msign, int index) {
int type = msign.getArgumentOpcodeType(index);
int offset = msign.getArgumentOffset(index);
storeValue(mv, offset, type);
}
/** Loads all method arguments before INVOKEVIRTUAL call. */
public static void loadVirtualMethodArguments(MethodVisitor mv, MethodSignatureVisitor msign) {
for (int i = 1; i <= msign.getArgumentsCount(); i++) {
loadMethodArgument(mv, msign, i);
}
}
/** Loads all method arguments before INVOKESPECIAL call. */
public static void loadSpecialMethodArguments(MethodVisitor mv, MethodSignatureVisitor msign) {
mv.visitVarInsn(ALOAD, 0);
for (int i = 1; i <= msign.getArgumentsCount(); i++) {
loadMethodArgument(mv, msign, i);
}
}
