@Override
public IndexIterator iter(final IndexToken token) {
final int id = values.id(token.get());
if (id == 0) return IndexIterator.EMPTY;
final int len = lenList.get(id);
final int[] ids = idsList.get(id), pres;
if (data.meta.updindex) {
final IntList tmp = new IntList();
for (int i = 0; i < len; ++i) tmp.add(data.pre(ids[i]));
pres = tmp.sort().finish();
} else {
pres = ids;
}
return new IndexIterator() {
int p;
@Override
public boolean more() {
return p < len;
}
@Override
public int pre() {
return pres[p++];
}
@Override
public int size() {
return len;
}
};
}
/**
* Removes values from the index.
*
* @param key key
* @param vals sorted values
*/
void delete(final byte[] key, final int... vals) {
final int id = values.id(key), vl = vals.length, l = lenList.get(id), s = l - vl;
final int[] ids = idsList.get(id);
for (int i = 0, n = 0, v = 0; i < l; i++) {
if (v == vl || ids[i] != vals[v]) ids[n++] = ids[i];
else v++;
}
lenList.set(id, s);
if (s == 0) idsList.set(id, null);
}
/**
* Checks compatibility of dependency version with installed version.
*
* @param dep dependency
* @param currentVers current versions - either currently installed versions for a package or
* current version of BaseX
* @return available appropriate version
*/
private byte[] availVersion(final Dependency dep, final TokenSet currentVers) {
if (currentVers.size() == 0) return null;
if (dep.versions != null) {
// get acceptable versions for secondary package/processor
final TokenSet versList = new TokenSet(split(dep.versions, ' '));
// check if any acceptable version is already installed
for (final byte[] v : versList) if (currentVers.id(v) != 0) return v;
} else if (dep.semver != null) {
// version template - version of secondary package or BaseX version must
// be compatible with the defined template
final PkgVersion semVer = new PkgVersion(dep.semver);
for (final byte[] v : currentVers) if (new PkgVersion(v).isCompatible(semVer)) return v;
} else if (dep.semverMin != null && dep.semverMax != null) {
// version templates for minimal and maximal acceptable version - version
// of secondary package or BaseX version must be equal or above
// the minimal and strictly below the maximal
final PkgVersion min = new PkgVersion(dep.semverMin);
final PkgVersion max = new PkgVersion(dep.semverMax);
for (final byte[] nextVer : currentVers) {
final PkgVersion v = new PkgVersion(nextVer);
if (v.compareTo(min) >= 0 && v.compareTo(max) < 0) return nextVer;
}
} else if (dep.semverMin != null) {
// version template for minimal acceptable version - version of secondary
// package or BaseX version must be either compatible with this template
// or greater than it
final PkgVersion semVer = new PkgVersion(dep.semverMin);
for (final byte[] nextVer : currentVers) {
final PkgVersion v = new PkgVersion(nextVer);
if (v.isCompatible(semVer) || v.compareTo(semVer) >= 0) return nextVer;
}
} else if (dep.semverMax != null) {
// version template for maximal acceptable version - version of secondary
// package or BaseX version must be either compatible with this template
// or smaller than it
final PkgVersion semVer = new PkgVersion(dep.semverMax);
for (final byte[] nextVer : currentVers) {
final PkgVersion v = new PkgVersion(nextVer);
if (v.isCompatible(semVer) || v.compareTo(semVer) <= 0) return nextVer;
}
} else {
// no versioning attribute is specified => any version of the secondary
// package is acceptable
return currentVers.keys()[0];
}
return null;
}
/**
* Adds values to the index.
*
* @param key key to be indexed
* @param vals sorted values
*/
void add(final byte[] key, final int... vals) {
// token index: add values. otherwise, reference existing values
final int id = type == IndexType.TOKEN ? values.put(key) : values.id(key), vl = vals.length;
// updatable index: if required, resize existing arrays
while (idsList.size() < id + 1) idsList.add(null);
if (lenList.size() < id + 1) lenList.set(id, 0);
final int len = lenList.get(id), size = len + vl;
int[] ids = idsList.get(id);
if (ids == null) {
ids = vals;
} else {
if (ids.length < size) ids = Arrays.copyOf(ids, Array.newSize(size));
System.arraycopy(vals, 0, ids, len, vl);
if (ids[len - 1] > vals[0]) {
if (reorder == null) reorder = new BoolList(values.size());
reorder.set(id, true);
}
}
idsList.set(id, ids);
lenList.set(id, size);
}
@Override
public int costs(final IndexToken it) {
return lenList.get(values.id(it.get()));
}
