// Retrieves the row from the table and check if it exists and has not been flagged as deleted
protected Map<RecordId, Result> getRows(List<RecordId> recordIds, List<FieldType> fields)
throws RecordException {
Map<RecordId, Result> results = new HashMap<RecordId, Result>();
try {
List<Get> gets = new ArrayList<Get>();
for (RecordId recordId : recordIds) {
Get get = new Get(recordId.toBytes());
// Add the columns for the fields to get
addFieldsToGet(get, fields);
get.setMaxVersions(1); // Only retrieve the most recent version of each field
gets.add(get);
}
// Retrieve the data from the repository
int i = 0;
for (Result result : recordTable.get(gets)) {
if (result == null || result.isEmpty()) {
i++; // Skip this recordId (instead of throwing a RecordNotFoundException)
continue;
}
// Check if the record was deleted
byte[] deleted = recdec.getLatest(result, RecordCf.DATA.bytes, RecordColumn.DELETED.bytes);
if ((deleted == null) || (Bytes.toBoolean(deleted))) {
i++; // Skip this recordId (instead of throwing a RecordNotFoundException)
continue;
}
results.put(recordIds.get(i++), result);
}
} catch (IOException e) {
throw new RecordException(
"Exception occurred while retrieving records '" + recordIds + "' from HBase table", e);
}
return results;
}
/**
* Builds Object from Bytes Picked from Hbase.
*
* @param b
* @param klass
* @return
*/
public static Object toObject(byte[] b, Class<?> klass) {
if (klass.isAssignableFrom(String.class)) {
return Bytes.toString(b);
} else if (klass.equals(int.class) || klass.isAssignableFrom(Integer.class)) {
return Bytes.toInt(b);
} else if (klass.equals(long.class) || klass.isAssignableFrom(Long.class)) {
return Bytes.toLong(b);
} else if (klass.equals(boolean.class) || klass.isAssignableFrom(Boolean.class)) {
return Bytes.toBoolean(b);
} else if (klass.equals(double.class) || klass.isAssignableFrom(Double.class)) {
return Bytes.toDouble(b);
} else if (klass.equals(float.class) || klass.isAssignableFrom(Float.class)) {
return Bytes.toFloat(b);
} else if (klass.equals(short.class) || klass.isAssignableFrom(Short.class)) {
return Bytes.toShort(b);
} else if (klass.equals(BigDecimal.class)) {
return Bytes.toBigDecimal(b);
} else {
throw new MetaModelException("Could Not find a suitable Type for " + klass.getName());
}
}
public java.lang.String toString(byte[] bytes) {
return java.lang.Boolean.toString(Bytes.toBoolean(bytes));
}
/**
* Converts the given value from bytes based on data type and cardinality information for the
* given property. For 'many' or multi-valued properties, if the SDO Java type for the property is
* not already String, the value is first converted from a String using the SDO conversion which
* uses java.util.Arrays formatting, resulting in an array of primitive types. For non 'many' or
* singular properties, only the HBase Bytes utility is used.
*
* @param targetProperty the property
* @param value the bytes value
* @return the converted object
* @throws IllegalArgumentException if the given property is not a data type property
*/
public Object fromBytes(Property targetProperty, byte[] value) {
Object result = null;
if (!targetProperty.getType().isDataType())
throw new IllegalArgumentException(
"property " + targetProperty.toString() + " is not a datatype property");
DataType targetDataType = DataType.valueOf(targetProperty.getType().getName());
switch (targetDataType) {
// Data types stored as String bytes in HBase
case String:
case Strings:
case URI:
case Month:
case MonthDay:
case Day:
case Time:
case Year:
case YearMonth:
case YearMonthDay:
case Duration:
String resultStr = Bytes.toString(value);
result = DataConverter.INSTANCE.fromString(targetProperty, resultStr);
break;
case Date:
resultStr = Bytes.toString(value);
result = DataConverter.INSTANCE.fromString(targetProperty, resultStr);
break;
case DateTime:
// NOTE: remember datetime is a String Java representation in SDO 2.1
resultStr = Bytes.toString(value);
result = DataConverter.INSTANCE.fromString(targetProperty, resultStr);
break;
// Data types stored by directly converting from primitive types to bytes in HBase.
// TODO: for these data types determine if there is a way to "delimit" multiple values yet
// not take the extra and expensive step of first converting to delimited String.
case Decimal:
if (!targetProperty.isMany()) result = Bytes.toBigDecimal(value);
else result = DataConverter.INSTANCE.fromString(targetProperty, Bytes.toString(value));
break;
case Bytes:
if (!targetProperty.isMany()) result = value; // already bytes
else result = DataConverter.INSTANCE.fromString(targetProperty, Bytes.toString(value));
break;
case Byte:
if (!targetProperty.isMany()) {
// NOTE: no toByte method as would expect as there is opposite method, see below
// e.g. Bytes.toByte(value);
if (value != null) {
if (value.length > 2)
log.warn(
"truncating "
+ String.valueOf(value.length)
+ " length byte array for target data type 'byte'");
result = value[0];
}
} else result = DataConverter.INSTANCE.fromString(targetProperty, Bytes.toString(value));
break;
case Boolean:
if (!targetProperty.isMany()) result = Bytes.toBoolean(value);
else result = DataConverter.INSTANCE.fromString(targetProperty, Bytes.toString(value));
break;
case Character:
if (!targetProperty.isMany()) result = Character.valueOf(Bytes.toString(value).charAt(0));
else result = DataConverter.INSTANCE.fromString(targetProperty, Bytes.toString(value));
break;
case Double:
if (!targetProperty.isMany()) result = Bytes.toDouble(value);
else result = DataConverter.INSTANCE.fromString(targetProperty, Bytes.toString(value));
break;
case Float:
if (!targetProperty.isMany()) result = Bytes.toFloat(value);
else result = DataConverter.INSTANCE.fromString(targetProperty, Bytes.toString(value));
break;
case Int:
if (!targetProperty.isMany()) result = Bytes.toInt(value);
else result = DataConverter.INSTANCE.fromString(targetProperty, Bytes.toString(value));
break;
case Integer:
if (!targetProperty.isMany()) result = new BigInteger(value);
else result = DataConverter.INSTANCE.fromString(targetProperty, Bytes.toString(value));
break;
case Long:
if (!targetProperty.isMany()) result = Bytes.toLong(value);
else result = DataConverter.INSTANCE.fromString(targetProperty, Bytes.toString(value));
break;
case Short:
if (!targetProperty.isMany()) result = Bytes.toShort(value);
else result = DataConverter.INSTANCE.fromString(targetProperty, Bytes.toString(value));
break;
case Object:
// FIXME: custom serialization?
default:
result = Bytes.toString(value);
break;
}
return result;
}
