Example usage for org.objectweb.asm MethodVisitor visitJumpInsn

List of usage examples for org.objectweb.asm MethodVisitor visitJumpInsn

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Introduction

In this page you can find the example usage for org.objectweb.asm MethodVisitor visitJumpInsn.

Prototype

public void visitJumpInsn(final int opcode, final Label label)

Source Link

Document

Visits a jump instruction.

Usage

From source file:mt.swift.Serializer.java

License:Apache License

private void generateWriteMap(MethodVisitor methodVisitor, FrameRegisterManager context, MapType mapType) {
    // top of stack is list we're serializing
    int mapSlot = context.newAnonymousSlot();
    methodVisitor.visitVarInsn(ASTORE, mapSlot);

    // protocol.writeListBegin(new TList(ttype, object.size))
    methodVisitor.visitVarInsn(ALOAD, context.getSlot("protocol"));

    methodVisitor.visitTypeInsn(NEW, "com/facebook/thrift/protocol/TMap");
    methodVisitor.visitInsn(DUP);//from w  ww  . j  av a 2  s  .  co  m
    pushValue(methodVisitor, mapType.getKeyType().getTType());
    pushValue(methodVisitor, mapType.getValueType().getTType());
    methodVisitor.visitVarInsn(ALOAD, mapSlot);
    methodVisitor.visitMethodInsn(INVOKEINTERFACE, "java/util/Map", "size", "()I");
    methodVisitor.visitMethodInsn(INVOKESPECIAL, "com/facebook/thrift/protocol/TMap", "<init>", "(BBI)V");

    methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "com/facebook/thrift/protocol/TProtocol", "writeMapBegin",
            "(Lcom/facebook/thrift/protocol/TMap;)V");

    // at this point, stack is empty

    // for (element : value), using a while (iterator.hasNext()) { ... } loop
    methodVisitor.visitVarInsn(ALOAD, mapSlot);
    methodVisitor.visitMethodInsn(INVOKEINTERFACE, "java/util/Map", "entrySet", "()Ljava/util/Set;");
    methodVisitor.visitMethodInsn(INVOKEINTERFACE, "java/util/Set", "iterator", "()Ljava/util/Iterator;");

    // TODO: generalize generateIterator method to take a callback to generate the code for processing each
    // element
    Label loopLabel = new Label();
    Label doneLabel = new Label();

    methodVisitor.visitLabel(loopLabel);
    methodVisitor.visitInsn(DUP); // for iterator.hasNext()
    methodVisitor.visitInsn(DUP); // for iterator.next()

    // iterator.hasNext?
    methodVisitor.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "hasNext", "()Z");

    methodVisitor.visitJumpInsn(IFEQ, doneLabel); // if hasNext returned false (0), we're done

    methodVisitor.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "next", "()Ljava/lang/Object;");
    // element is Map.Entry

    methodVisitor.visitInsn(DUP); // for entry.getKey

    int entrySlot = context.newAnonymousSlot();
    methodVisitor.visitVarInsn(ASTORE, entrySlot); // for entry.getValue

    methodVisitor.visitMethodInsn(INVOKEINTERFACE, "java/util/Map$Entry", "getKey", "()Ljava/lang/Object;");
    generateCast(methodVisitor, mapType.getKeyType());
    generateWriteElement(methodVisitor, context, mapType.getKeyType());

    methodVisitor.visitVarInsn(ALOAD, entrySlot);
    methodVisitor.visitMethodInsn(INVOKEINTERFACE, "java/util/Map$Entry", "getValue", "()Ljava/lang/Object;");
    generateCast(methodVisitor, mapType.getValueType());
    generateWriteElement(methodVisitor, context, mapType.getValueType());

    context.release(entrySlot);

    methodVisitor.visitJumpInsn(GOTO, loopLabel);

    methodVisitor.visitLabel(doneLabel);
    methodVisitor.visitInsn(POP); // lingering reference to iterator

    // protocol.writeSetEnd()
    methodVisitor.visitVarInsn(ALOAD, context.getSlot("protocol"));
    methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "com/facebook/thrift/protocol/TProtocol", "writeMapEnd",
            "()V");

    context.release(mapSlot);
}

From source file:mt.swift.Serializer.java

License:Apache License

/**
 * Generates code to write the elements of an iterator, one after another
 *
 * Assumes iterator is at top of stack//from w  ww  . j a  va2 s . c  o  m
 *
 * @param methodVisitor
 * @param context
 * @param elementType
 */
private void generateWriteIteratorElements(MethodVisitor methodVisitor, FrameRegisterManager context,
        Type elementType) {
    Label loopLabel = new Label();
    Label doneLabel = new Label();

    methodVisitor.visitLabel(loopLabel);
    methodVisitor.visitInsn(DUP); // for iterator.hasNext()
    methodVisitor.visitInsn(DUP); // for iterator.next()

    // iterator.hasNext?
    methodVisitor.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "hasNext", "()Z");

    methodVisitor.visitJumpInsn(IFEQ, doneLabel); // if hasNext returned false (0), we're done

    methodVisitor.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "next", "()Ljava/lang/Object;");

    generateCast(methodVisitor, elementType);
    generateWriteElement(methodVisitor, context, elementType);

    methodVisitor.visitJumpInsn(GOTO, loopLabel);

    methodVisitor.visitLabel(doneLabel);
    methodVisitor.visitInsn(POP); // lingering reference to iterator
    methodVisitor.visitInsn(POP); // lingering reference to iterator
}

From source file:net.sf.sveditor.core.db.persistence.JITPersistenceDelegateFactory.java

License:Open Source License

private void buildItemDispatchMethods(ClassWriter cw) {
    String classname = "SVDBPersistenceDelegate";
    String full_classname = transform_cls(fTargetPkg) + "/" + classname;

    Label labels[] = new Label[SVDBItemType.values().length];
    int indexes[] = new int[SVDBItemType.values().length];
    Label dflt, endcase;/*from   www .  j a  va 2s . c  o  m*/

    for (int i = 0; i < SVDBItemType.values().length; i++) {
        indexes[i] = i;
    }

    // writeItem Dispatch method
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "writeSVDBItem",
            "(L" + getClassName(ISVDBItemBase.class) + ";)V", null, new String[] { fDBWriteException });
    for (int i = 0; i < SVDBItemType.values().length; i++) {
        labels[i] = new Label();
    }
    dflt = new Label();
    endcase = new Label();

    // Retrieve the object type
    mv.visitVarInsn(ALOAD, WRITE_OBJ_VAR);
    mv.visitMethodInsn(INVOKEINTERFACE, getClassName(ISVDBItemBase.class), "getType",
            "()L" + getClassName(SVDBItemType.class) + ";");
    mv.visitMethodInsn(INVOKEVIRTUAL, getClassName(SVDBItemType.class), "ordinal", "()I");
    mv.visitLookupSwitchInsn(dflt, indexes, labels);
    for (SVDBItemType t : SVDBItemType.values()) {
        Class c = fTypeClassMap.get(t);
        mv.visitLabel(labels[t.ordinal()]);

        mv.visitVarInsn(ALOAD, THIS_VAR);
        mv.visitVarInsn(ALOAD, WRITE_OBJ_VAR);
        mv.visitTypeInsn(CHECKCAST, getClassName(c));
        mv.visitMethodInsn(INVOKESPECIAL, full_classname, "write" + t.name(), "(L" + getClassName(c) + ";)V");
        mv.visitJumpInsn(GOTO, endcase);
    }
    mv.visitLabel(dflt);
    mv.visitLabel(endcase);
    mv.visitInsn(RETURN);
    mv.visitMaxs(16, 16);
    mv.visitEnd();

    // readItem dispatch method
    mv = cw.visitMethod(
            ACC_PUBLIC, "readSVDBItem", "(L" + getClassName(SVDBItemType.class) + ";L"
                    + getClassName(ISVDBChildItem.class) + ";)L" + getClassName(ISVDBItemBase.class) + ";",
            null, new String[] { fDBWriteException });
    for (int i = 0; i < SVDBItemType.values().length; i++) {
        labels[i] = new Label();
    }
    dflt = new Label();
    endcase = new Label();

    mv.visitVarInsn(ALOAD, 1); // object type
    mv.visitMethodInsn(INVOKEVIRTUAL, getClassName(SVDBItemType.class), "ordinal", "()I");
    mv.visitLookupSwitchInsn(dflt, indexes, labels);
    for (SVDBItemType t : SVDBItemType.values()) {
        Class c = fTypeClassMap.get(t);
        mv.visitLabel(labels[t.ordinal()]);

        mv.visitVarInsn(ALOAD, THIS_VAR);
        mv.visitVarInsn(ALOAD, 2); // parent
        mv.visitMethodInsn(INVOKESPECIAL, full_classname, "read" + t.name(),
                "(L" + getClassName(ISVDBChildItem.class) + ";)" + "L" + getClassName(c) + ";");
        mv.visitJumpInsn(GOTO, endcase);
    }
    mv.visitLabel(dflt);
    mv.visitInsn(ACONST_NULL);
    mv.visitLabel(endcase);
    mv.visitInsn(ARETURN);
    mv.visitMaxs(16, 16);
    mv.visitEnd();
}

From source file:net.sf.sveditor.core.db.persistence.JITPersistenceDelegateFactory.java

License:Open Source License

private void buildObjectDispatchMethods(ClassWriter cw) {
    String classname = "SVDBPersistenceDelegate";
    String full_classname = transform_cls(fTargetPkg) + "/" + classname;
    int idx;// ww w  .j  a  v a2 s.com

    Label labels[] = new Label[fClassList.size()];
    int indexes[] = new int[fClassList.size()];
    Label dflt, endcase;

    for (int i = 0; i < fClassList.size(); i++) {
        indexes[i] = i;
    }

    // writeItem Dispatch method
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "writeObject",
            "(L" + getClassName(Class.class) + ";" + "L" + getClassName(Object.class) + ";)V", null,
            new String[] { fDBWriteException });
    for (int i = 0; i < fClassList.size(); i++) {
        labels[i] = new Label();
    }
    dflt = new Label();
    endcase = new Label();

    // Find the object index
    mv.visitVarInsn(ALOAD, THIS_VAR);
    mv.visitFieldInsn(GETFIELD, fBaseClass, "fObjectTypeList", "L" + getClassName(List.class) + ";");

    // Class parameter
    // fObjectList field
    mv.visitVarInsn(ALOAD, 1); // cls parameter
    mv.visitMethodInsn(INVOKEINTERFACE, getClassName(List.class), "indexOf",
            "(L" + getClassName(Object.class) + ";)I");
    // Index now on the stack 
    mv.visitLookupSwitchInsn(dflt, indexes, labels);
    idx = 0;
    for (Class c : fClassList) {
        mv.visitLabel(labels[idx]);

        mv.visitVarInsn(ALOAD, THIS_VAR);
        mv.visitVarInsn(ALOAD, 2); // object
        mv.visitTypeInsn(CHECKCAST, getClassName(c));
        mv.visitMethodInsn(INVOKESPECIAL, full_classname, "write" + getClassLeafName(c),
                "(L" + getClassName(c) + ";)V");
        mv.visitJumpInsn(GOTO, endcase);
        idx++;
    }
    mv.visitLabel(dflt);
    mv.visitVarInsn(ALOAD, THIS_VAR);
    mv.visitVarInsn(ALOAD, 2); // object
    mv.visitMethodInsn(INVOKESPECIAL, full_classname, "writeObjectErr",
            "(L" + getClassName(Object.class) + ";)V");

    mv.visitLabel(endcase);
    mv.visitInsn(RETURN);
    mv.visitMaxs(16, 16);
    mv.visitEnd();

    // readItem dispatch method
    mv = cw.visitMethod(
            ACC_PUBLIC, "readObject", "(L" + getClassName(ISVDBChildItem.class) + ";" + "L"
                    + getClassName(Class.class) + ";" + "L" + getClassName(Object.class) + ";)V",
            null, new String[] { fDBWriteException });
    for (int i = 0; i < fClassList.size(); i++) {
        labels[i] = new Label();
    }
    dflt = new Label();
    endcase = new Label();

    // Find the object index
    mv.visitVarInsn(ALOAD, THIS_VAR);
    mv.visitFieldInsn(GETFIELD, fBaseClass, "fObjectTypeList", "L" + getClassName(List.class) + ";");

    // Class parameter
    // fObjectList field
    mv.visitVarInsn(ALOAD, 2); // cls parameter
    mv.visitMethodInsn(INVOKEINTERFACE, getClassName(List.class), "indexOf",
            "(L" + getClassName(Object.class) + ";)I");

    mv.visitLookupSwitchInsn(dflt, indexes, labels);
    idx = 0;
    for (Class c : fClassList) {
        mv.visitLabel(labels[idx]);

        // 
        mv.visitVarInsn(ALOAD, THIS_VAR);
        mv.visitVarInsn(ALOAD, 1); // parent
        mv.visitVarInsn(ALOAD, 3); // object
        mv.visitTypeInsn(CHECKCAST, getClassName(c));
        mv.visitMethodInsn(INVOKESPECIAL, full_classname, "read" + getClassLeafName(c),
                "(L" + getClassName(ISVDBChildItem.class) + ";" + "L" + getClassName(c) + ";)V");
        mv.visitJumpInsn(GOTO, endcase);
        idx++;
    }
    mv.visitLabel(dflt);
    mv.visitVarInsn(ALOAD, THIS_VAR);
    mv.visitVarInsn(ALOAD, 3); // object
    mv.visitMethodInsn(INVOKESPECIAL, full_classname, "readObjectErr",
            "(L" + getClassName(Object.class) + ";)V");
    mv.visitLabel(endcase);
    mv.visitInsn(RETURN);
    mv.visitMaxs(4, 4);
    mv.visitEnd();
}

From source file:net.sourceforge.cobertura.instrument.pass3.AbstractCodeProvider.java

License:GNU General Public License

public void generateCodeThatIncrementsCoberturaCounterIfVariableEqualsAndCleanVariable(
        MethodVisitor nextMethodVisitor, Integer neededJumpCounterIdVariableValue, Integer counterIdToIncrement,
        int lastJumpIdVariableIndex, String className) {

    nextMethodVisitor.visitLdcInsn((int) neededJumpCounterIdVariableValue);
    nextMethodVisitor.visitVarInsn(Opcodes.ILOAD, lastJumpIdVariableIndex);
    Label afterJump = new Label();
    nextMethodVisitor.visitJumpInsn(Opcodes.IF_ICMPNE, afterJump);
    generateCodeThatIncrementsCoberturaCounter(nextMethodVisitor, counterIdToIncrement, className);
    generateCodeThatZeroJumpCounterIdVariable(nextMethodVisitor, lastJumpIdVariableIndex);
    nextMethodVisitor.visitLabel(afterJump);
}

From source file:net.sourceforge.cobertura.instrument.pass3.AtomicArrayCodeProvider.java

License:GNU General Public License

public void generateCINITmethod(MethodVisitor mv, String className, int counters_cnt) {
    mv.visitFieldInsn(Opcodes.GETSTATIC, className, COBERTURA_COUNTERS_FIELD_NAME,
            COBERTURA_COUNTERS_FIELD_TYPE);
    Label l1 = new Label();
    mv.visitJumpInsn(Opcodes.IFNONNULL, l1);

    mv.visitTypeInsn(Opcodes.NEW, Type.getInternalName(AtomicIntegerArray.class));
    mv.visitInsn(Opcodes.DUP);//from  w  ww  . j av a2 s  .  c  o  m
    mv.visitLdcInsn(counters_cnt);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(AtomicIntegerArray.class), "<init>", "(I)V");
    mv.visitFieldInsn(Opcodes.PUTSTATIC, className, COBERTURA_COUNTERS_FIELD_NAME,
            COBERTURA_COUNTERS_FIELD_TYPE);
    generateRegisterClass(mv, className);
    mv.visitLabel(l1);
}

From source file:net.sourceforge.cobertura.instrument.pass3.AtomicArrayCodeProvider.java

License:GNU General Public License

/**
 * <pre>/*from w w  w .  ja  v a 2  s.c o m*/
 * int[] __cobertura_get_and_reset_counters() {
 * int[] res = new int[counters.length()];
 * for(int i=0; i<counters.length(); i++){
 * res[i]=counters.getAndSet(i, 0);
 * }
 * return res;
 * }
 * </pre>
 */
public void generateCoberturaGetAndResetCountersMethod(ClassVisitor cv, String className) {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC,
            COBERTURA_GET_AND_RESET_COUNTERS_METHOD_NAME, "()[I", null, null);

    mv.visitCode();
    mv.visitFieldInsn(Opcodes.GETSTATIC, className, COBERTURA_COUNTERS_FIELD_NAME,
            COBERTURA_COUNTERS_FIELD_TYPE);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/util/concurrent/atomic/AtomicIntegerArray", "length",
            "()I");
    mv.visitIntInsn(Opcodes.NEWARRAY, Opcodes.T_INT);
    mv.visitVarInsn(Opcodes.ASTORE, 0);
    mv.visitInsn(Opcodes.ICONST_0);
    mv.visitVarInsn(Opcodes.ISTORE, 1);
    Label l3 = new Label();
    mv.visitJumpInsn(Opcodes.GOTO, l3);
    Label l4 = new Label();
    mv.visitLabel(l4);
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitVarInsn(Opcodes.ILOAD, 1);
    mv.visitFieldInsn(Opcodes.GETSTATIC, className, COBERTURA_COUNTERS_FIELD_NAME,
            COBERTURA_COUNTERS_FIELD_TYPE);
    mv.visitVarInsn(Opcodes.ILOAD, 1);
    mv.visitInsn(Opcodes.ICONST_0);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/util/concurrent/atomic/AtomicIntegerArray", "getAndSet",
            "(II)I");
    mv.visitInsn(Opcodes.IASTORE);
    mv.visitIincInsn(1, 1);
    mv.visitLabel(l3);
    mv.visitVarInsn(Opcodes.ILOAD, 1);
    mv.visitFieldInsn(Opcodes.GETSTATIC, className, COBERTURA_COUNTERS_FIELD_NAME,
            COBERTURA_COUNTERS_FIELD_TYPE);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/util/concurrent/atomic/AtomicIntegerArray", "length",
            "()I");
    mv.visitJumpInsn(Opcodes.IF_ICMPLT, l4);
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitInsn(Opcodes.ARETURN);
    mv.visitMaxs(0, 0);//will be recalculated by writer
    mv.visitEnd();
}

From source file:net.sourceforge.cobertura.instrument.pass3.FastArrayCodeProvider.java

License:GNU General Public License

public void generateCINITmethod(MethodVisitor mv, String className, int counters_cnt) {
    mv.visitFieldInsn(Opcodes.GETSTATIC, className, COBERTURA_COUNTERS_FIELD_NAME,
            COBERTURA_COUNTERS_FIELD_TYPE);
    Label l1 = new Label();
    mv.visitJumpInsn(Opcodes.IFNONNULL, l1);
    mv.visitLdcInsn(counters_cnt);/*from w  ww .  j a v a 2s.com*/
    mv.visitIntInsn(Opcodes.NEWARRAY, Opcodes.T_INT);
    mv.visitFieldInsn(Opcodes.PUTSTATIC, className, COBERTURA_COUNTERS_FIELD_NAME,
            COBERTURA_COUNTERS_FIELD_TYPE);
    generateRegisterClass(mv, className);
    mv.visitLabel(l1);
}

From source file:net.sourceforge.cobertura.instrument.pass3.TestUnitCodeProvider.java

License:GNU General Public License

/**
 * Generates://from  w w  w .j av a 2s. c o  m
 *   public static void __cobertura_init()
 *   {
 *     if (__cobertura_counters == null)
 *       {
 *         __cobertura_counters = new TestUnitInformationHolder[class.length];
 *       }
 *       TouchCollector.registerClass("mypackage/HelloWorld");
 *   }
 */
public void generateCINITmethod(MethodVisitor mv, String className, int counters_cnt) {
    mv.visitFieldInsn(Opcodes.GETSTATIC, className, COBERTURA_COUNTERS_FIELD_NAME,
            COBERTURA_COUNTERS_FIELD_TYPE);
    Label l1 = new Label();
    mv.visitJumpInsn(Opcodes.IFNONNULL, l1);
    mv.visitLdcInsn(counters_cnt);
    mv.visitTypeInsn(Opcodes.ANEWARRAY, Type.getInternalName(TestUnitInformationHolder.class));
    mv.visitFieldInsn(Opcodes.PUTSTATIC, className, COBERTURA_COUNTERS_FIELD_NAME,
            COBERTURA_COUNTERS_FIELD_TYPE);

    mv.visitInsn(ICONST_0);
    mv.visitVarInsn(ISTORE, 1);
    Label l11 = new Label();
    mv.visitLabel(l11);
    Label l2 = new Label();
    mv.visitJumpInsn(GOTO, l2);
    Label l3 = new Label();
    mv.visitLabel(l3);
    mv.visitLineNumber(24, l3);
    mv.visitFrame(Opcodes.F_APPEND, 1, new Object[] { Opcodes.INTEGER }, 0, null);
    mv.visitFieldInsn(GETSTATIC, className, COBERTURA_COUNTERS_FIELD_NAME, COBERTURA_COUNTERS_FIELD_TYPE);
    mv.visitVarInsn(ILOAD, 1);
    mv.visitTypeInsn(NEW, "net/sourceforge/cobertura/coveragedata/TestUnitInformationHolder");
    mv.visitInsn(DUP);
    mv.visitMethodInsn(INVOKESPECIAL, "net/sourceforge/cobertura/coveragedata/TestUnitInformationHolder",
            "<init>", "()V");
    mv.visitInsn(AASTORE);
    Label l4 = new Label();
    mv.visitLabel(l4);
    mv.visitLineNumber(23, l4);
    mv.visitIincInsn(1, 1);
    mv.visitLabel(l2);
    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    mv.visitVarInsn(ILOAD, 1);
    mv.visitFieldInsn(GETSTATIC, className, COBERTURA_COUNTERS_FIELD_NAME, COBERTURA_COUNTERS_FIELD_TYPE);
    mv.visitInsn(ARRAYLENGTH);
    mv.visitJumpInsn(IF_ICMPLT, l3);

    mv.visitLabel(l1);

    generateRegisterClass(mv, className);
}

From source file:one.nio.http.gen.RequestHandlerGenerator.java

License:Apache License

private void convertArgument(MethodVisitor mv, Class type, boolean needNullCheck) {
    if (type == String.class) {
        return; // nothing to do
    }/*from www . j a  v  a2 s.  c  o m*/

    if (type.isPrimitive()) {
        if (type == int.class) {
            mv.visitMethodInsn(INVOKESTATIC, "java/lang/Integer", "parseInt", "(Ljava/lang/String;)I");
        } else if (type == long.class) {
            mv.visitMethodInsn(INVOKESTATIC, "java/lang/Long", "parseLong", "(Ljava/lang/String;)J");
        } else if (type == byte.class) {
            mv.visitMethodInsn(INVOKESTATIC, "java/lang/Byte", "parseByte", "(Ljava/lang/String;)B");
        } else if (type == short.class) {
            mv.visitMethodInsn(INVOKESTATIC, "java/lang/Short", "parseShort", "(Ljava/lang/String;)S");
        } else if (type == float.class) {
            mv.visitMethodInsn(INVOKESTATIC, "java/lang/Float", "parseFloat", "(Ljava/lang/String;)F");
        } else if (type == double.class) {
            mv.visitMethodInsn(INVOKESTATIC, "java/lang/Double", "parseDouble", "(Ljava/lang/String;)D");
        } else if (type == boolean.class) {
            mv.visitMethodInsn(INVOKESTATIC, "java/lang/Boolean", "parseBoolean", "(Ljava/lang/String;)Z");
        } else if (type == char.class) {
            mv.visitInsn(ICONST_0);
            mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "charAt", "(I)C");
        }
        return;
    }

    Label isNull = new Label();
    if (needNullCheck) {
        Label nonNull = new Label();
        mv.visitInsn(DUP);
        mv.visitJumpInsn(IFNONNULL, nonNull);
        mv.visitInsn(POP);
        mv.visitInsn(ACONST_NULL);
        mv.visitJumpInsn(GOTO, isNull);
        mv.visitLabel(nonNull);
    }

    if (type == Integer.class) {
        mv.visitMethodInsn(INVOKESTATIC, "java/lang/Integer", "valueOf",
                "(Ljava/lang/String;)Ljava/lang/Integer;");
    } else if (type == Long.class) {
        mv.visitMethodInsn(INVOKESTATIC, "java/lang/Long", "valueOf", "(Ljava/lang/String;)Ljava/lang/Long;");
    } else if (type == Byte.class) {
        mv.visitMethodInsn(INVOKESTATIC, "java/lang/Byte", "valueOf", "(Ljava/lang/String;)Ljava/lang/Byte;");
    } else if (type == Short.class) {
        mv.visitMethodInsn(INVOKESTATIC, "java/lang/Short", "valueOf", "(Ljava/lang/String;)Ljava/lang/Short;");
    } else if (type == Float.class) {
        mv.visitMethodInsn(INVOKESTATIC, "java/lang/Float", "valueOf", "(Ljava/lang/String;)Ljava/lang/Float;");
    } else if (type == Double.class) {
        mv.visitMethodInsn(INVOKESTATIC, "java/lang/Double", "valueOf",
                "(Ljava/lang/String;)Ljava/lang/Double;");
    } else if (type == Boolean.class) {
        mv.visitMethodInsn(INVOKESTATIC, "java/lang/Boolean", "valueOf",
                "(Ljava/lang/String;)Ljava/lang/Boolean;");
    } else {
        throw new IllegalArgumentException("Unsupported argument type: " + type.getName());
    }

    if (needNullCheck) {
        mv.visitLabel(isNull);
    }
}