Problem in reading a string back which was stored using custom binding.

Question

Hi All,
i use below codes to do custom binding
public class CSVRecord {    
private String key;
/** To keep how many values we have for a key.
* This is used to retrive values' element during constructing CSVRecord object back from stream.
private int valuesSize;
* to keep values for a key
private String[] values;
public CSVRecord()
public CSVRecord(String key, String[] values)
this.key = key;
this.values = values;
this.valuesSize = this.values.length;
public String getKey() {
return key;
public void setKey(String key) {
this.key = key;
public String[] getValues() {
return values;
public void setValues(String[] values) {
this.values = values;
public int getValuesSize() {
return valuesSize;
TupleBiniding code:
public class CSVRecordTupleBinding extends TupleBinding {
public void objectToEntry(Object object , TupleOutput tupleOutput)
CSVRecord record = (CSVRecord)object;
tupleOutput.writeString(record.getKey());
tupleOutput.writeInt(record.getValuesSize());
for(int i=0;i<record.getValuesSize();i++)
tupleOutput.writeString(record.getValues());
public Object entryToObject(TupleInput tupleInput) {
<font color="red"> String key = tupleInput.readString(); </font> <br>
int valuesSize = tupleInput.readInt();
String[] values = new String[valuesSize];
for(int i=0;i<valuesSize;i++)
values[i] = tupleInput.readString();
return new CSVRecord(key,values);
But when i reconstruct an object using cusom binding i face below exceptions
Caused by: java.lang.ArrayIndexOutOfBoundsException: 8
     at com.sleepycat.util.UtfOps.getZeroTerminatedByteLength(UtfOps.java:38)
     at com.sleepycat.bind.tuple.TupleInput.readString(TupleInput.java:150)
     at com.ml.odr.regression.comparison.CSVRecordTupleBinding.entryToObject(CSVRecordTupleBinding.java:30)
     at com.sleepycat.bind.tuple.TupleBinding.entryToObject(TupleBinding.java:73)
This is especially happens at the line where i read the key back.
could you please advise ?.
Thanks,
Srini

Answer 1

Hi Srini,
I don't see anything obviously wrong with the code you posted, except perhaps that the setter, setValues, does not update valuesSize -- you really don't need the valuesSize field, you can use the array length instead.
There must be something wrong elsewhere in your program. Please post a complete test program, that has a main() and can be run with only the JE jar file, that demonstrates the problem.
--mark