Examples with AbstractArrayBlock com.facebook.presto.common.block.AbstractArrayBlock used on opensource projects

Example 1 with AbstractArrayBlock

use of com.facebook.presto.common.block.AbstractArrayBlock in project presto by prestodb.

the class PrestoThriftBigintArray method fromBlock.

public static PrestoThriftBlock fromBlock(Block block) {
    checkArgument(block instanceof AbstractArrayBlock, "block is not of an array type");
    AbstractArrayBlock arrayBlock = (AbstractArrayBlock) block;
    int positions = arrayBlock.getPositionCount();
    if (positions == 0) {
        return bigintArrayData(new PrestoThriftBigintArray(null, null, null));
    }
    boolean[] nulls = null;
    int[] sizes = null;
    for (int position = 0; position < positions; position++) {
        if (arrayBlock.isNull(position)) {
            if (nulls == null) {
                nulls = new boolean[positions];
            }
            nulls[position] = true;
        } else {
            if (sizes == null) {
                sizes = new int[positions];
            }
            sizes[position] = arrayBlock.apply((valuesBlock, startPosition, length) -> length, position);
        }
    }
    PrestoThriftBigint values = arrayBlock.apply((valuesBlock, startPosition, length) -> PrestoThriftBigint.fromBlock(valuesBlock), 0).getBigintData();
    checkState(values != null, "values must be present");
    checkState(totalSize(nulls, sizes) == values.numberOfRecords(), "unexpected number of values");
    return bigintArrayData(new PrestoThriftBigintArray(nulls, sizes, values));
}