Examples with Instruction org.ballerinalang.util.codegen.Instruction used on opensource projects

Example 1 with Instruction

use of org.ballerinalang.util.codegen.Instruction in project ballerina by ballerina-lang.

the class TestAnnotationProcessor method injectMocks.

/**
 * Process a given {@link TestSuite} and inject the user defined mock functions.
 *
 * @param suite a @{@link TestSuite}
 */
public static void injectMocks(TestSuite suite) {
    ProgramFile programFile = suite.getProgramFile();
    Map<String, TesterinaFunction> mockFunctions = suite.getMockFunctionsMap();
    mockFunctions.forEach((k, v) -> {
        String[] info = k.split(MOCK_ANNOTATION_DELIMITER);
        if (info.length != 2) {
            return;
        }
        for (PackageInfo packageInfo : programFile.getPackageInfoEntries()) {
            for (Instruction ins : packageInfo.getInstructions()) {
                if (ins instanceof Instruction.InstructionCALL) {
                    // replace the function pointer of the instruction with the mock function pointer
                    Instruction.InstructionCALL call = (Instruction.InstructionCALL) ins;
                    if (call.functionInfo.getPkgPath().equals(info[0]) && call.functionInfo.getName().equals(info[1])) {
                        suite.addMockedRealFunction(k, call.functionInfo);
                        call.functionInfo = v.getbFunction();
                    }
                }
            }
        }
    });
}

Example 2 with Instruction

use of org.ballerinalang.util.codegen.Instruction in project ballerina by ballerina-lang.

the class TestAnnotationProcessor method resetMocks.

/**
 * Process a given {@link TestSuite} and reset the mock functions with their original pointers.
 *
 * @param suite a @{@link TestSuite}
 */
public static void resetMocks(TestSuite suite) {
    ProgramFile programFile = suite.getProgramFile();
    Map<String, TesterinaFunction> mockFunctions = suite.getMockFunctionsMap();
    Map<String, FunctionInfo> mockedRealFunctionsMap = suite.getMockedRealFunctionsMap();
    mockFunctions.forEach((k, v) -> {
        String[] info = k.split(MOCK_ANNOTATION_DELIMITER);
        if (info.length != 2) {
            return;
        }
        for (PackageInfo packageInfo : programFile.getPackageInfoEntries()) {
            for (Instruction ins : packageInfo.getInstructions()) {
                if (ins instanceof Instruction.InstructionCALL) {
                    Instruction.InstructionCALL call = (Instruction.InstructionCALL) ins;
                    if (call.functionInfo.getPkgPath().equals(info[0]) && call.functionInfo.getName().equals(info[1])) {
                        call.functionInfo = mockedRealFunctionsMap.get(k);
                    }
                }
            }
        }
    });
}

Example 3 with Instruction

use of org.ballerinalang.util.codegen.Instruction in project ballerina by ballerina-lang.

the class CPU method tryExec.

@SuppressWarnings("rawtypes")
private static void tryExec(WorkerExecutionContext ctx) {
    BLangScheduler.workerRunning(ctx);
    int i;
    int j;
    int cpIndex;
    FunctionCallCPEntry funcCallCPEntry;
    FunctionRefCPEntry funcRefCPEntry;
    TypeRefCPEntry typeRefCPEntry;
    FunctionInfo functionInfo;
    InstructionCALL callIns;
    boolean debugEnabled = ctx.programFile.getDebugger().isDebugEnabled();
    WorkerData currentSF, callersSF;
    int callersRetRegIndex;
    while (ctx.ip >= 0) {
        if (ctx.stop) {
            BLangScheduler.workerDone(ctx);
            return;
        }
        if (debugEnabled && debug(ctx)) {
            return;
        }
        Instruction instruction = ctx.code[ctx.ip];
        int opcode = instruction.getOpcode();
        int[] operands = instruction.getOperands();
        ctx.ip++;
        WorkerData sf = ctx.workerLocal;
        switch(opcode) {
            case InstructionCodes.ICONST:
                cpIndex = operands[0];
                i = operands[1];
                sf.longRegs[i] = ((IntegerCPEntry) ctx.constPool[cpIndex]).getValue();
                break;
            case InstructionCodes.FCONST:
                cpIndex = operands[0];
                i = operands[1];
                sf.doubleRegs[i] = ((FloatCPEntry) ctx.constPool[cpIndex]).getValue();
                break;
            case InstructionCodes.SCONST:
                cpIndex = operands[0];
                i = operands[1];
                sf.stringRegs[i] = ((StringCPEntry) ctx.constPool[cpIndex]).getValue();
                break;
            case InstructionCodes.ICONST_0:
                i = operands[0];
                sf.longRegs[i] = 0;
                break;
            case InstructionCodes.ICONST_1:
                i = operands[0];
                sf.longRegs[i] = 1;
                break;
            case InstructionCodes.ICONST_2:
                i = operands[0];
                sf.longRegs[i] = 2;
                break;
            case InstructionCodes.ICONST_3:
                i = operands[0];
                sf.longRegs[i] = 3;
                break;
            case InstructionCodes.ICONST_4:
                i = operands[0];
                sf.longRegs[i] = 4;
                break;
            case InstructionCodes.ICONST_5:
                i = operands[0];
                sf.longRegs[i] = 5;
                break;
            case InstructionCodes.FCONST_0:
                i = operands[0];
                sf.doubleRegs[i] = 0;
                break;
            case InstructionCodes.FCONST_1:
                i = operands[0];
                sf.doubleRegs[i] = 1;
                break;
            case InstructionCodes.FCONST_2:
                i = operands[0];
                sf.doubleRegs[i] = 2;
                break;
            case InstructionCodes.FCONST_3:
                i = operands[0];
                sf.doubleRegs[i] = 3;
                break;
            case InstructionCodes.FCONST_4:
                i = operands[0];
                sf.doubleRegs[i] = 4;
                break;
            case InstructionCodes.FCONST_5:
                i = operands[0];
                sf.doubleRegs[i] = 5;
                break;
            case InstructionCodes.BCONST_0:
                i = operands[0];
                sf.intRegs[i] = 0;
                break;
            case InstructionCodes.BCONST_1:
                i = operands[0];
                sf.intRegs[i] = 1;
                break;
            case InstructionCodes.RCONST_NULL:
                i = operands[0];
                sf.refRegs[i] = null;
                break;
            case InstructionCodes.IMOVE:
            case InstructionCodes.FMOVE:
            case InstructionCodes.SMOVE:
            case InstructionCodes.BMOVE:
            case InstructionCodes.LMOVE:
            case InstructionCodes.RMOVE:
            case InstructionCodes.IALOAD:
            case InstructionCodes.FALOAD:
            case InstructionCodes.SALOAD:
            case InstructionCodes.BALOAD:
            case InstructionCodes.LALOAD:
            case InstructionCodes.RALOAD:
            case InstructionCodes.JSONALOAD:
            case InstructionCodes.IGLOAD:
            case InstructionCodes.FGLOAD:
            case InstructionCodes.SGLOAD:
            case InstructionCodes.BGLOAD:
            case InstructionCodes.LGLOAD:
            case InstructionCodes.RGLOAD:
            case InstructionCodes.IFIELDLOAD:
            case InstructionCodes.FFIELDLOAD:
            case InstructionCodes.SFIELDLOAD:
            case InstructionCodes.BFIELDLOAD:
            case InstructionCodes.LFIELDLOAD:
            case InstructionCodes.RFIELDLOAD:
            case InstructionCodes.MAPLOAD:
            case InstructionCodes.JSONLOAD:
            case InstructionCodes.ENUMERATORLOAD:
                execLoadOpcodes(ctx, sf, opcode, operands);
                break;
            case InstructionCodes.IASTORE:
            case InstructionCodes.FASTORE:
            case InstructionCodes.SASTORE:
            case InstructionCodes.BASTORE:
            case InstructionCodes.LASTORE:
            case InstructionCodes.RASTORE:
            case InstructionCodes.JSONASTORE:
            case InstructionCodes.IGSTORE:
            case InstructionCodes.FGSTORE:
            case InstructionCodes.SGSTORE:
            case InstructionCodes.BGSTORE:
            case InstructionCodes.LGSTORE:
            case InstructionCodes.RGSTORE:
            case InstructionCodes.IFIELDSTORE:
            case InstructionCodes.FFIELDSTORE:
            case InstructionCodes.SFIELDSTORE:
            case InstructionCodes.BFIELDSTORE:
            case InstructionCodes.LFIELDSTORE:
            case InstructionCodes.RFIELDSTORE:
            case InstructionCodes.MAPSTORE:
            case InstructionCodes.JSONSTORE:
                execStoreOpcodes(ctx, sf, opcode, operands);
                break;
            case InstructionCodes.IADD:
            case InstructionCodes.FADD:
            case InstructionCodes.SADD:
            case InstructionCodes.XMLADD:
            case InstructionCodes.ISUB:
            case InstructionCodes.FSUB:
            case InstructionCodes.IMUL:
            case InstructionCodes.FMUL:
            case InstructionCodes.IDIV:
            case InstructionCodes.FDIV:
            case InstructionCodes.IMOD:
            case InstructionCodes.FMOD:
            case InstructionCodes.INEG:
            case InstructionCodes.FNEG:
            case InstructionCodes.BNOT:
            case InstructionCodes.IEQ:
            case InstructionCodes.FEQ:
            case InstructionCodes.SEQ:
            case InstructionCodes.BEQ:
            case InstructionCodes.REQ:
            case InstructionCodes.TEQ:
            case InstructionCodes.INE:
            case InstructionCodes.FNE:
            case InstructionCodes.SNE:
            case InstructionCodes.BNE:
            case InstructionCodes.RNE:
            case InstructionCodes.TNE:
                execBinaryOpCodes(ctx, sf, opcode, operands);
                break;
            case InstructionCodes.LENGTHOF:
                calculateLength(ctx, operands, sf);
                break;
            case InstructionCodes.TYPELOAD:
                cpIndex = operands[0];
                j = operands[1];
                TypeRefCPEntry typeEntry = (TypeRefCPEntry) ctx.constPool[cpIndex];
                sf.refRegs[j] = new BTypeDescValue(typeEntry.getType());
                break;
            case InstructionCodes.TYPEOF:
                i = operands[0];
                j = operands[1];
                BValue val = sf.refRegs[i];
                if (val == null || (val instanceof BString && ((BString) val).value() == null)) {
                    sf.refRegs[j] = new BTypeDescValue(BTypes.typeNull);
                    break;
                }
                sf.refRegs[j] = new BTypeDescValue(sf.refRegs[i].getType());
                break;
            case InstructionCodes.HALT:
                ctx = handleHalt(ctx);
                if (ctx == null) {
                    return;
                }
                break;
            case InstructionCodes.IGT:
            case InstructionCodes.FGT:
            case InstructionCodes.IGE:
            case InstructionCodes.FGE:
            case InstructionCodes.ILT:
            case InstructionCodes.FLT:
            case InstructionCodes.ILE:
            case InstructionCodes.FLE:
            case InstructionCodes.REQ_NULL:
            case InstructionCodes.RNE_NULL:
            case InstructionCodes.BR_TRUE:
            case InstructionCodes.BR_FALSE:
            case InstructionCodes.GOTO:
            case InstructionCodes.SEQ_NULL:
            case InstructionCodes.SNE_NULL:
                execCmpAndBranchOpcodes(ctx, sf, opcode, operands);
                break;
            case InstructionCodes.TR_RETRY:
                i = operands[0];
                j = operands[1];
                int l = operands[2];
                retryTransaction(ctx, i, j, l);
                break;
            case InstructionCodes.CALL:
                callIns = (InstructionCALL) instruction;
                ctx = BLangFunctions.invokeCallable(callIns.functionInfo, ctx, callIns.argRegs, callIns.retRegs, false, callIns.flags);
                if (ctx == null) {
                    return;
                }
                break;
            case InstructionCodes.VCALL:
                InstructionVCALL vcallIns = (InstructionVCALL) instruction;
                ctx = invokeVirtualFunction(ctx, vcallIns.receiverRegIndex, vcallIns.functionInfo, vcallIns.argRegs, vcallIns.retRegs, vcallIns.flags);
                if (ctx == null) {
                    return;
                }
                break;
            case InstructionCodes.ACALL:
                InstructionACALL acallIns = (InstructionACALL) instruction;
                ctx = invokeAction(ctx, acallIns.actionName, acallIns.argRegs, acallIns.retRegs, acallIns.flags);
                if (ctx == null) {
                    return;
                }
                break;
            case InstructionCodes.TCALL:
                InstructionTCALL tcallIns = (InstructionTCALL) instruction;
                ctx = BLangFunctions.invokeCallable(tcallIns.transformerInfo, ctx, tcallIns.argRegs, tcallIns.retRegs, false, tcallIns.flags);
                if (ctx == null) {
                    return;
                }
                break;
            case InstructionCodes.TR_BEGIN:
                i = operands[0];
                j = operands[1];
                int k = operands[2];
                int h = operands[3];
                beginTransaction(ctx, i, j, k, h);
                break;
            case InstructionCodes.TR_END:
                i = operands[0];
                j = operands[1];
                endTransaction(ctx, i, j);
                break;
            case InstructionCodes.WRKSEND:
                InstructionWRKSendReceive wrkSendIns = (InstructionWRKSendReceive) instruction;
                handleWorkerSend(ctx, wrkSendIns.dataChannelInfo, wrkSendIns.types, wrkSendIns.regs);
                break;
            case InstructionCodes.WRKRECEIVE:
                InstructionWRKSendReceive wrkReceiveIns = (InstructionWRKSendReceive) instruction;
                if (!handleWorkerReceive(ctx, wrkReceiveIns.dataChannelInfo, wrkReceiveIns.types, wrkReceiveIns.regs)) {
                    return;
                }
                break;
            case InstructionCodes.FORKJOIN:
                InstructionFORKJOIN forkJoinIns = (InstructionFORKJOIN) instruction;
                ctx = invokeForkJoin(ctx, forkJoinIns);
                if (ctx == null) {
                    return;
                }
                break;
            case InstructionCodes.THROW:
                i = operands[0];
                if (i >= 0) {
                    BStruct error = (BStruct) sf.refRegs[i];
                    if (error == null) {
                        handleNullRefError(ctx);
                        break;
                    }
                    BLangVMErrors.attachStackFrame(error, ctx);
                    ctx.setError(error);
                }
                handleError(ctx);
                break;
            case InstructionCodes.ERRSTORE:
                i = operands[0];
                sf.refRegs[i] = ctx.getError();
                // clear error
                ctx.setError(null);
                break;
            case InstructionCodes.FPCALL:
                i = operands[0];
                if (sf.refRegs[i] == null) {
                    handleNullRefError(ctx);
                    break;
                }
                cpIndex = operands[1];
                funcCallCPEntry = (FunctionCallCPEntry) ctx.constPool[cpIndex];
                funcRefCPEntry = ((BFunctionPointer) sf.refRegs[i]).value();
                functionInfo = funcRefCPEntry.getFunctionInfo();
                ctx = BLangFunctions.invokeCallable(functionInfo, ctx, funcCallCPEntry.getArgRegs(), funcCallCPEntry.getRetRegs(), false);
                if (ctx == null) {
                    return;
                }
                break;
            case InstructionCodes.FPLOAD:
                i = operands[0];
                j = operands[1];
                funcRefCPEntry = (FunctionRefCPEntry) ctx.constPool[i];
                sf.refRegs[j] = new BFunctionPointer(funcRefCPEntry);
                break;
            case InstructionCodes.I2ANY:
            case InstructionCodes.F2ANY:
            case InstructionCodes.S2ANY:
            case InstructionCodes.B2ANY:
            case InstructionCodes.L2ANY:
            case InstructionCodes.ANY2I:
            case InstructionCodes.ANY2F:
            case InstructionCodes.ANY2S:
            case InstructionCodes.ANY2B:
            case InstructionCodes.ANY2L:
            case InstructionCodes.ANY2JSON:
            case InstructionCodes.ANY2XML:
            case InstructionCodes.ANY2MAP:
            case InstructionCodes.ANY2TYPE:
            case InstructionCodes.ANY2E:
            case InstructionCodes.ANY2T:
            case InstructionCodes.ANY2C:
            case InstructionCodes.ANY2DT:
            case InstructionCodes.NULL2JSON:
            case InstructionCodes.CHECKCAST:
            case InstructionCodes.B2JSON:
            case InstructionCodes.JSON2I:
            case InstructionCodes.JSON2F:
            case InstructionCodes.JSON2S:
            case InstructionCodes.JSON2B:
            case InstructionCodes.NULL2S:
            case InstructionCodes.IS_ASSIGNABLE:
            case InstructionCodes.CHECK_CONVERSION:
                execTypeCastOpcodes(ctx, sf, opcode, operands);
                break;
            case InstructionCodes.I2F:
            case InstructionCodes.I2S:
            case InstructionCodes.I2B:
            case InstructionCodes.I2JSON:
            case InstructionCodes.F2I:
            case InstructionCodes.F2S:
            case InstructionCodes.F2B:
            case InstructionCodes.F2JSON:
            case InstructionCodes.S2I:
            case InstructionCodes.S2F:
            case InstructionCodes.S2B:
            case InstructionCodes.S2JSON:
            case InstructionCodes.B2I:
            case InstructionCodes.B2F:
            case InstructionCodes.B2S:
            case InstructionCodes.DT2XML:
            case InstructionCodes.DT2JSON:
            case InstructionCodes.T2MAP:
            case InstructionCodes.T2JSON:
            case InstructionCodes.MAP2T:
            case InstructionCodes.JSON2T:
            case InstructionCodes.XMLATTRS2MAP:
            case InstructionCodes.S2XML:
            case InstructionCodes.S2JSONX:
            case InstructionCodes.XML2S:
            case InstructionCodes.ANY2SCONV:
                execTypeConversionOpcodes(ctx, sf, opcode, operands);
                break;
            case InstructionCodes.INEWARRAY:
                i = operands[0];
                sf.refRegs[i] = new BIntArray();
                break;
            case InstructionCodes.ARRAYLEN:
                i = operands[0];
                j = operands[1];
                BValue value = sf.refRegs[i];
                if (value == null) {
                    handleNullRefError(ctx);
                    break;
                }
                if (value.getType().getTag() == TypeTags.JSON_TAG) {
                    sf.longRegs[j] = ((BJSON) value).value().size();
                    break;
                }
                sf.longRegs[j] = ((BNewArray) value).size();
                break;
            case InstructionCodes.FNEWARRAY:
                i = operands[0];
                sf.refRegs[i] = new BFloatArray();
                break;
            case InstructionCodes.SNEWARRAY:
                i = operands[0];
                sf.refRegs[i] = new BStringArray();
                break;
            case InstructionCodes.BNEWARRAY:
                i = operands[0];
                sf.refRegs[i] = new BBooleanArray();
                break;
            case InstructionCodes.LNEWARRAY:
                i = operands[0];
                sf.refRegs[i] = new BBlobArray();
                break;
            case InstructionCodes.RNEWARRAY:
                i = operands[0];
                cpIndex = operands[1];
                typeRefCPEntry = (TypeRefCPEntry) ctx.constPool[cpIndex];
                sf.refRegs[i] = new BRefValueArray(typeRefCPEntry.getType());
                break;
            case InstructionCodes.JSONNEWARRAY:
                i = operands[0];
                j = operands[1];
                // This is a temporary solution to create n-valued JSON array
                StringJoiner stringJoiner = new StringJoiner(",", "[", "]");
                for (int index = 0; index < sf.longRegs[j]; index++) {
                    stringJoiner.add(null);
                }
                sf.refRegs[i] = new BJSON(stringJoiner.toString());
                break;
            case InstructionCodes.NEWSTRUCT:
                createNewStruct(ctx, operands, sf);
                break;
            case InstructionCodes.NEWCONNECTOR:
                createNewConnector(ctx, operands, sf);
                break;
            case InstructionCodes.NEWMAP:
                i = operands[0];
                cpIndex = operands[1];
                typeRefCPEntry = (TypeRefCPEntry) ctx.constPool[cpIndex];
                BMapType mapType = (BMapType) typeRefCPEntry.getType();
                sf.refRegs[i] = new BMap<String, BRefType>(mapType);
                break;
            case InstructionCodes.NEWJSON:
                i = operands[0];
                cpIndex = operands[1];
                typeRefCPEntry = (TypeRefCPEntry) ctx.constPool[cpIndex];
                sf.refRegs[i] = new BJSON("{}", typeRefCPEntry.getType());
                break;
            case InstructionCodes.NEWTABLE:
                i = operands[0];
                cpIndex = operands[1];
                typeRefCPEntry = (TypeRefCPEntry) ctx.constPool[cpIndex];
                sf.refRegs[i] = new BTable(typeRefCPEntry.getType());
                break;
            case InstructionCodes.NEWSTREAM:
                i = operands[0];
                cpIndex = operands[1];
                typeRefCPEntry = (TypeRefCPEntry) ctx.constPool[cpIndex];
                StringCPEntry name = (StringCPEntry) ctx.constPool[operands[2]];
                BStream stream = new BStream(typeRefCPEntry.getType(), name.getValue());
                sf.refRegs[i] = stream;
                break;
            case InstructionCodes.NEW_INT_RANGE:
                createNewIntRange(operands, sf);
                break;
            case InstructionCodes.IRET:
                i = operands[0];
                j = operands[1];
                currentSF = ctx.workerLocal;
                callersSF = ctx.workerResult;
                callersRetRegIndex = ctx.retRegIndexes[i];
                callersSF.longRegs[callersRetRegIndex] = currentSF.longRegs[j];
                break;
            case InstructionCodes.FRET:
                i = operands[0];
                j = operands[1];
                currentSF = ctx.workerLocal;
                callersSF = ctx.workerResult;
                callersRetRegIndex = ctx.retRegIndexes[i];
                callersSF.doubleRegs[callersRetRegIndex] = currentSF.doubleRegs[j];
                break;
            case InstructionCodes.SRET:
                i = operands[0];
                j = operands[1];
                currentSF = ctx.workerLocal;
                callersSF = ctx.workerResult;
                callersRetRegIndex = ctx.retRegIndexes[i];
                callersSF.stringRegs[callersRetRegIndex] = currentSF.stringRegs[j];
                break;
            case InstructionCodes.BRET:
                i = operands[0];
                j = operands[1];
                currentSF = ctx.workerLocal;
                callersSF = ctx.workerResult;
                callersRetRegIndex = ctx.retRegIndexes[i];
                callersSF.intRegs[callersRetRegIndex] = currentSF.intRegs[j];
                break;
            case InstructionCodes.LRET:
                i = operands[0];
                j = operands[1];
                currentSF = ctx.workerLocal;
                callersSF = ctx.workerResult;
                callersRetRegIndex = ctx.retRegIndexes[i];
                callersSF.byteRegs[callersRetRegIndex] = currentSF.byteRegs[j];
                break;
            case InstructionCodes.RRET:
                i = operands[0];
                j = operands[1];
                currentSF = ctx.workerLocal;
                callersSF = ctx.workerResult;
                callersRetRegIndex = ctx.retRegIndexes[i];
                callersSF.refRegs[callersRetRegIndex] = currentSF.refRegs[j];
                break;
            case InstructionCodes.RET:
                ctx = handleReturn(ctx);
                if (ctx == null) {
                    return;
                }
                break;
            case InstructionCodes.XMLATTRSTORE:
            case InstructionCodes.XMLATTRLOAD:
            case InstructionCodes.XML2XMLATTRS:
            case InstructionCodes.S2QNAME:
            case InstructionCodes.NEWQNAME:
            case InstructionCodes.NEWXMLELEMENT:
            case InstructionCodes.NEWXMLCOMMENT:
            case InstructionCodes.NEWXMLTEXT:
            case InstructionCodes.NEWXMLPI:
            case InstructionCodes.XMLSEQSTORE:
            case InstructionCodes.XMLSEQLOAD:
            case InstructionCodes.XMLLOAD:
            case InstructionCodes.XMLLOADALL:
            case InstructionCodes.NEWXMLSEQ:
                execXMLOpcodes(ctx, sf, opcode, operands);
                break;
            case InstructionCodes.ITR_NEW:
            case InstructionCodes.ITR_NEXT:
            case InstructionCodes.ITR_HAS_NEXT:
                execIteratorOperation(ctx, sf, instruction);
                break;
            case InstructionCodes.LOCK:
                InstructionLock instructionLock = (InstructionLock) instruction;
                if (!handleVariableLock(ctx, instructionLock.types, instructionLock.varRegs)) {
                    return;
                }
                break;
            case InstructionCodes.UNLOCK:
                InstructionLock instructionUnLock = (InstructionLock) instruction;
                handleVariableUnlock(ctx, instructionUnLock.types, instructionUnLock.varRegs);
                break;
            case InstructionCodes.AWAIT:
                ctx = execAwait(ctx, operands);
                if (ctx == null) {
                    return;
                }
                break;
            default:
                throw new UnsupportedOperationException();
        }
    }
}