@Override
protected long index(final int pre, final int id, final byte[] value, final int kind) {
final DataAccess store;
final TokenObjMap<IntList> map;
if (kind == ATTR) {
store = values;
map = meta.attrindex ? atvBuffer : null;
} else {
store = texts;
// don't index document names
map = meta.textindex && kind != DOC ? txtBuffer : null;
}
// add text to map to index later
if (meta.updindex && map != null && value.length <= meta.maxlen) {
IntList ids = map.get(value);
if (ids == null) {
ids = new IntList(1);
map.put(value, ids);
}
ids.add(id);
}
// add text to text file
// inline integer value...
final long v = toSimpleInt(value);
if (v != Integer.MIN_VALUE) return v | IO.OFFNUM;
// store text
final long off = store.length();
final byte[] val = COMP.get().pack(value);
store.writeToken(off, val);
return val == value ? off : off | IO.OFFCOMP;
}
/**
* Calculates the text offset and writes the text value.
*
* @param value value to be inlined
* @param text text/attribute flag
* @return inline value or text position
* @throws IOException I/O exception
*/
private long textOff(final byte[] value, final boolean text) throws IOException {
// inline integer values...
final long v = Token.toSimpleInt(value);
if (v != Integer.MIN_VALUE) return v | IO.OFFNUM;
// store text
final DataOutput store = text ? xout : vout;
final long off = store.size();
final byte[] val = COMP.get().pack(value);
store.writeToken(val);
return val == value ? off : off | IO.OFFCOMP;
}
@Override
protected void updateText(final int pre, final byte[] value, final int kind) {
final boolean text = kind != ATTR;
if (meta.updindex) {
// update indexes
final int id = id(pre);
final byte[] oldval = text(pre, text);
final DiskValues index = (DiskValues) (text ? textIndex : attrIndex);
// don't index document names
if (index != null && kind != DOC) index.replace(oldval, value, id);
}
// reference to text store
final DataAccess store = text ? texts : values;
// file length
final long len = store.length();
// new entry (offset or value)
final long v = toSimpleInt(value);
if (v != Integer.MIN_VALUE) {
// inline integer value
textOff(pre, v | IO.OFFNUM);
} else {
// text to be stored (possibly packed)
final byte[] val = COMP.get().pack(value);
// old entry (offset or value)
final long old = textOff(pre);
// find text store offset
final long off;
if (number(old)) {
// numeric entry: append new entry at the end
off = len;
} else {
// text size (0 if value will be inlined)
final int vl = val.length;
off = store.free(old & IO.OFFCOMP - 1, vl + Num.length(vl));
}
store.writeToken(off, val);
textOff(pre, val == value ? off : off | IO.OFFCOMP);
}
}
/**
* Returns a text (text, comment, pi) or attribute value.
*
* @param off text offset
* @param text text or attribute flag
* @return text
*/
private byte[] txt(final long off, final boolean text) {
final byte[] txt = (text ? texts : values).readToken(off & IO.OFFCOMP - 1);
return compressed(off) ? COMP.get().unpack(txt) : txt;
}