/**
* Read a row from the data page at the given position.
*
* @param data the data page
* @param pos the position to read from
* @param columnCount the number of columns
* @return the row
*/
private static Row readRow(Data data, int pos, int columnCount) {
Value[] values = new Value[columnCount];
synchronized (data) {
data.setPos(pos);
for (int i = 0; i < columnCount; i++) {
values[i] = data.readValue();
}
}
return RegularTable.createRow(values);
}
/**
* Read a row from an input stream.
*
* @param in the input stream
* @param data a temporary buffer
* @return the row
*/
public static Row readRow(DataReader in, Data data) throws IOException {
long key = in.readVarLong();
int len = in.readVarInt();
data.reset();
data.checkCapacity(len);
in.readFully(data.getBytes(), len);
int columnCount = data.readVarInt();
Value[] values = new Value[columnCount];
for (int i = 0; i < columnCount; i++) {
values[i] = data.readValue();
}
Row row = new Row(values, Row.MEMORY_CALCULATE);
row.setKey(key);
return row;
}
private void readRow(ResultDiskTape tape) {
int min = Constants.FILE_BLOCK_SIZE;
Data buff = rowBuff;
buff.reset();
file.readFully(buff.getBytes(), 0, min);
int len = buff.readInt();
buff.checkCapacity(len);
if (len - min > 0) {
file.readFully(buff.getBytes(), min, len - min);
}
tape.pos += len;
Value[] row = new Value[columnCount];
for (int k = 0; k < columnCount; k++) {
row[k] = buff.readValue();
}
tape.buffer.add(row);
}
private Row readRow(Data buff) {
if (buff.readByte() == 0) {
return null;
}
int mem = buff.readInt();
int columnCount = buff.readInt();
long key = buff.readLong();
int version = buff.readInt();
if (readUncached) {
key = 0;
}
boolean deleted = buff.readInt() == 1;
int sessionId = buff.readInt();
Value[] values = new Value[columnCount];
for (int i = 0; i < columnCount; i++) {
Value v;
if (buff.readByte() == 0) {
v = null;
} else {
v = buff.readValue();
if (v.isLinked()) {
// the table id is 0 if it was linked when writing
// a temporary entry
if (v.getTableId() == 0) {
session.unlinkAtCommit(v);
}
}
}
values[i] = v;
}
Row row = new Row(values, mem);
row.setKey(key);
row.setVersion(version);
row.setDeleted(deleted);
row.setSessionId(sessionId);
return row;
}