package water.fvec;
import water.util.UnsafeUtils;
/**
* The constant 'long' column.
*/
public class C0LChunk extends Chunk {
protected static final int _OFF=8+4;
private long _con;
public C0LChunk(long con, int len) { _mem=new byte[_OFF]; _start = -1; set_len(len);
_con = con;
UnsafeUtils.set8(_mem, 0, con);
UnsafeUtils.set4(_mem,8,len);
}
@Override public boolean hasFloat() { return false; }
@Override public boolean hasNA() { return false; }
@Override protected final long at8_impl( int i ) { return _con; }
@Override protected final double atd_impl( int i ) {return _con; }
@Override protected final boolean isNA_impl( int i ) { return false; }
@Override boolean set_impl(int idx, long l) { return l==_con; }
@Override boolean set_impl(int i, double d) { return d==_con; }
@Override boolean set_impl(int i, float f ) { return f==_con; }
@Override boolean setNA_impl(int i) { return false; }
@Override boolean set_impl (int idx, String str) { return false; }
@Override double min() { return _con; }
@Override double max() { return _con; }
@Override public final void initFromBytes () {
_start = -1; _cidx = -1;
_con = UnsafeUtils.get8(_mem,0);
set_len(UnsafeUtils.get4(_mem,8));
}
@Override public boolean isSparseZero(){return _con == 0;}
@Override public int sparseLenZero(){return _con == 0?0: _len;}
@Override public int nextNZ(int rid){return _con == 0?_len:rid+1;}
@Override public int nonzeros(int [] arr) {
if (_con == 0) return 0;
for (int i = 0; i < _len; ++i) arr[i] = i;
return _len;
}
@Override
public <T extends ChunkVisitor> T processRows(T v, int from, int to){
if(_con == 0)
v.addZeros(to-from);
else for(int i = from; i < to; i++)
v.addValue(_con);
return v;
}
@Override
public <T extends ChunkVisitor> T processRows(T v, int [] ids){
if(_con == 0)
v.addZeros(ids.length);
else for(int i = 0; i < ids.length; i++)
v.addValue(_con);
return v;
}
}