Examples with ColumnValueDecoder org.apache.phoenix.schema.ColumnValueDecoder used on opensource projects

Example 1 with ColumnValueDecoder

use of org.apache.phoenix.schema.ColumnValueDecoder in project phoenix by apache.

the class SingleCellColumnExpression method evaluate.

@Override
public boolean evaluate(Tuple tuple, ImmutableBytesWritable ptr) {
    if (!super.evaluate(tuple, ptr)) {
        return false;
    } else if (ptr.getLength() == 0) {
        return true;
    }
    // the first position is reserved and we offset maxEncodedColumnQualifier by ENCODED_CQ_COUNTER_INITIAL_VALUE (which is the minimum encoded column qualifier)
    int index = decodedColumnQualifier - QueryConstants.ENCODED_CQ_COUNTER_INITIAL_VALUE + 1;
    byte serializedImmutableStorageScheme = ptr.get()[ptr.getOffset() + ptr.getLength() - Bytes.SIZEOF_BYTE];
    ImmutableStorageScheme immutableStorageScheme = ImmutableStorageScheme.fromSerializedValue(serializedImmutableStorageScheme);
    // Given a ptr to the entire array, set ptr to point to a particular element within that array
    ColumnValueDecoder encoderDecoder = immutableStorageScheme.getDecoder();
    return encoderDecoder.decode(ptr, index);
}