/*
* Copyright 2003-2016 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jetbrains.mps.lang.smodel;
import gnu.trove.TObjectIntHashMap;
import jetbrains.mps.smodel.adapter.ids.MetaIdFactory;
import jetbrains.mps.smodel.adapter.ids.MetaIdHelper;
import jetbrains.mps.smodel.adapter.ids.SConceptId;
import org.jetbrains.mps.openapi.language.SAbstractConcept;
/**
* Facility to build an effective SConcept->int map for concepts not necessarily from the same language.
* Not thread-safe, expected usage pattern is {@code new Builder().put().put().seal()} doesn't suggest multi-threading.
* FIXME move to [smodelRuntime] module
* @author Artem Tikhomirov
* @since 3.5
*/
public final class ConceptSwitchIndexBuilder {
private final TObjectIntHashMap<SConceptId> myConcepts = new TObjectIntHashMap<>();
private int myNextAvailableIndex = 0;
// prevent from modification of exposed map instance (don't want to copy map on seal())
private boolean myIsSealed = false;
public ConceptSwitchIndexBuilder put(SAbstractConcept c, int i) {
assert !myIsSealed;
updateNextAvailableIndex(i);
myConcepts.put(MetaIdHelper.getConcept(c), i);
return this;
}
public ConceptSwitchIndexBuilder put(SConceptId cid, int i) {
assert !myIsSealed;
updateNextAvailableIndex(i);
myConcepts.put(cid, i);
return this;
}
public ConceptSwitchIndexBuilder put(long uuidHigh, long uuidLow, long concept, int i) {
assert !myIsSealed;
updateNextAvailableIndex(i);
myConcepts.put(MetaIdFactory.conceptId(uuidHigh, uuidLow, concept), i);
return this;
}
public ConceptSwitchIndexBuilder put(SConceptId... cid) {
assert !myIsSealed;
if (cid == null) {
return this;
}
int i = myNextAvailableIndex;
for (SConceptId c : cid) {
myConcepts.put(c, i++);
}
myNextAvailableIndex = i;
return this;
}
/**
* Use of the builder is not expected once this method has been invoked.
* XXX perhaps, ConceptIndex return value would be better, jsut need to regenerate a lot.
*/
public ConceptSwitchIndex seal() {
assert !myIsSealed;
myIsSealed = true;
myConcepts.compact();
return new ConceptSwitchIndex(myConcepts);
}
private void updateNextAvailableIndex(int i) {
assert i >= myNextAvailableIndex;
myNextAvailableIndex = i + 1;
}
}