/*
* Copyright 2004-2023 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (https://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.result;
import org.h2.engine.Constants;
import org.h2.value.Value;
import org.h2.value.ValueBigint;
import org.h2.value.ValueNull;
/**
* A simple row that contains data for only one column.
*/
public class SimpleRowValue extends SearchRow {
private int index;
private final int virtualColumnCount;
private Value data;
public SimpleRowValue(int columnCount) {
this.virtualColumnCount = columnCount;
}
public SimpleRowValue(int columnCount, int index) {
this.virtualColumnCount = columnCount;
this.index = index;
}
@Override
public int getColumnCount() {
return virtualColumnCount;
}
@Override
public Value getValue(int idx) {
if (idx == ROWID_INDEX) {
return ValueBigint.get(getKey());
}
return idx == index ? data : null;
}
@Override
public void setValue(int idx, Value v) {
if (idx == ROWID_INDEX) {
setKey(v.getLong());
}
index = idx;
data = v;
}
@Override
public String toString() {
return "( /* " + key + " */ " + (data == null ?
"null" : data.getTraceSQL()) + " )";
}
@Override
public int getMemory() {
return Constants.MEMORY_ROW + (data == null ? 0 : data.getMemory());
}
@Override
public boolean isNull(int index) {
return index != this.index || data == null || data == ValueNull.INSTANCE;
}
@Override
public void copyFrom(SearchRow source) {
setKey(source.getKey());
setValue(index, source.getValue(index));
}
}