@Override
public void execute(final GUI gui) {
final DialogExport dialog = new DialogExport(gui);
if (!dialog.ok()) return;
final IOFile root = new IOFile(dialog.path());
// check if existing files will be overwritten
if (root.exists()) {
IO file = null;
boolean overwrite = false;
final Data d = gui.context.data();
final IntList il = d.resources.docs();
final int is = il.size();
for (int i = 0; i < is; i++) {
file = root.merge(Token.string(d.text(il.get(i), true)));
if (file.exists()) {
if (overwrite) {
// more than one file will be overwritten; check remaining tests
file = null;
break;
}
overwrite = true;
}
}
if (overwrite) {
// show message for overwriting files or directories
final String msg = file == null ? FILES_REPLACE_X : FILE_EXISTS_X;
if (file == null) file = root;
if (!BaseXDialog.confirm(gui, Util.info(msg, file))) return;
}
}
DialogProgress.execute(gui, new Export(root.path()));
}
@Override
public Item item(final QueryContext qc, final InputInfo ii) throws QueryException {
final Data data = checkData(qc);
final String path = path(1, qc);
if (data.inMemory()) return Bln.FALSE;
final IOFile io = data.meta.binary(path);
return Bln.get(io.exists() && !io.isDir());
}
@Override
public void execute(final GUI gui) {
// skip operation for root context
final Context ctx = gui.context;
if (ctx.root()) return;
// check if all nodes are document nodes
boolean doc = true;
final Data data = ctx.data();
for (final int pre : ctx.current().pres) doc &= data.kind(pre) == Data.DOC;
if (doc) {
// if yes, jump to database root
ctx.update();
gui.notify.context(ctx.current(), false, null);
} else {
// otherwise, jump to parent nodes
gui.execute(new Cs(".."));
}
}
@Override
public boolean indexAccessible(final IndexInfo ii) {
/* If the following conditions yield true, the index is accessed:
* - all query terms are statically available
* - no FTTimes option is specified
* - explicitly set case, diacritics and stemming match options do not
* conflict with index options. */
data = ii.ic.data;
final MetaData md = data.meta;
final FTOpt fto = ftt.opt;
/* Index will be applied if no explicit match options have been set
* that conflict with the index options. As a consequence, though, index-
* based querying might yield other results than sequential scanning. */
if (occ != null
|| fto.cs != null && md.casesens == (fto.cs == FTCase.INSENSITIVE)
|| fto.isSet(DC) && md.diacritics != fto.is(DC)
|| fto.isSet(ST) && md.stemming != fto.is(ST)
|| fto.ln != null && !fto.ln.equals(md.language)) return false;
// adopt database options to tokenizer
fto.copy(md);
// estimate costs if text is not known at compile time
if (tokens == null) {
ii.costs = Math.max(2, data.meta.size / 30);
return true;
}
// summarize number of hits; break loop if no hits are expected
final FTLexer ft = new FTLexer(fto);
ii.costs = 0;
for (byte[] t : tokens) {
ft.init(t);
while (ft.hasNext()) {
final byte[] tok = ft.nextToken();
if (fto.sw != null && fto.sw.contains(tok)) continue;
if (fto.is(WC)) {
// don't use index if one of the terms starts with a wildcard
t = ft.get();
if (t[0] == '.') return false;
// don't use index if certain characters or more than 1 dot are found
int d = 0;
for (final byte w : t) {
if (w == '{' || w == '\\' || w == '.' && ++d > 1) return false;
}
}
// favor full-text index requests over exact queries
final int costs = data.costs(ft);
if (costs != 0) ii.costs += Math.max(2, costs / 100);
}
}
return true;
}
@Override
public BasicNodeIter iter(final QueryContext qc) {
final boolean text = index.type() == IndexType.TEXT;
final byte kind = text ? Data.TEXT : Data.ATTR;
final Data data = ictx.data;
final int ml = data.meta.maxlen;
final IndexIterator ii =
index.min.length <= ml
&& index.max.length <= ml
&& (text ? data.meta.textindex : data.meta.attrindex)
? data.iter(index)
: scan();
return new BasicNodeIter() {
@Override
public ANode next() {
return ii.more() ? new DBNode(data, ii.pre(), kind) : null;
}
};
}