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package org.eclipse.viatra.solver.data.model.internal;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import org.eclipse.viatra.solver.data.map.ContinousHashProvider;
import org.eclipse.viatra.solver.data.map.Cursor;
import org.eclipse.viatra.solver.data.map.DiffCursor;
import org.eclipse.viatra.solver.data.map.VersionedMap;
import org.eclipse.viatra.solver.data.map.internal.MapDiffCursor;
import org.eclipse.viatra.solver.data.model.Model;
import org.eclipse.viatra.solver.data.model.ModelDiffCursor;
import org.eclipse.viatra.solver.data.model.ModelStore;
import org.eclipse.viatra.solver.data.model.representation.DataRepresentation;
public class ModelImpl implements Model {
private final ModelStore store;
private final Map<DataRepresentation<?, ?>, VersionedMap<?, ?>> maps;
public ModelImpl(ModelStore store, Map<DataRepresentation<?, ?>, VersionedMap<?, ?>> maps) {
this.store = store;
this.maps = maps;
}
@Override
public Set<DataRepresentation<?, ?>> getDataRepresentations() {
return maps.keySet();
}
@SuppressWarnings("unchecked")
private <K, V> VersionedMap<K, V> getMap(DataRepresentation<K, V> representation) {
if (maps.containsKey(representation)) {
return (VersionedMap<K, V>) maps.get(representation);
} else {
throw new IllegalArgumentException("Model does have representation " + representation);
}
}
private <K, V> VersionedMap<K, V> getMapValidateKey(DataRepresentation<K, V> representation, K key) {
if (representation.isValidKey(key)) {
return getMap(representation);
} else {
throw new IllegalArgumentException(
"Key is not valid for representation! (representation=" + representation + ", key=" + key + ");");
}
}
@Override
public <K, V> V get(DataRepresentation<K, V> representation, K key) {
return getMapValidateKey(representation, key).get(key);
}
@Override
public <K, V> Cursor<K, V> getAll(DataRepresentation<K, V> representation) {
return getMap(representation).getAll();
}
@Override
public <K, V> V put(DataRepresentation<K, V> representation, K key, V value) {
return getMapValidateKey(representation, key).put(key, value);
}
@Override
public <K, V> void putAll(DataRepresentation<K, V> representation, Cursor<K, V> cursor) {
getMap(representation).putAll(cursor);
}
@Override
public <K, V> long getSize(DataRepresentation<K, V> representation) {
return getMap(representation).getSize();
}
@Override
public ModelDiffCursor getDiffCursor(long to) {
Model toModel = store.createModel(to);
Map<DataRepresentation<?, ?>, DiffCursor<?, ?>> diffCursors = new HashMap<>();
for (DataRepresentation<?, ?> representation : this.maps.keySet()) {
MapDiffCursor<?, ?> diffCursor = constructDiffCursor(toModel, representation);
diffCursors.put(representation, diffCursor);
}
return new ModelDiffCursor(diffCursors);
}
private <K, V> MapDiffCursor<K, V> constructDiffCursor(Model toModel, DataRepresentation<K, V> representation) {
@SuppressWarnings("unchecked")
Cursor<K, V> fromCursor = (Cursor<K, V>) this.maps.get(representation).getAll();
Cursor<K, V> toCursor = toModel.getAll(representation);
ContinousHashProvider<K> hashProvider = representation.getHashProvider();
V defaultValue = representation.getDefaultValue();
return new MapDiffCursor<>(hashProvider, defaultValue, fromCursor, toCursor);
}
@Override
public long commit() {
long version = 0;
boolean versionSet = false;
for (VersionedMap<?, ?> map : maps.values()) {
long newVersion = map.commit();
if (versionSet) {
if (version != newVersion) {
throw new IllegalStateException(
"Maps in model have different versions! (" + version + " and" + newVersion + ")");
}
} else {
version = newVersion;
versionSet = true;
}
}
return version;
}
@Override
public void restore(long state) {
if(store.getStates().contains(state)) {
for (VersionedMap<?, ?> map : maps.values()) {
map.restore(state);
}
} else {
throw new IllegalArgumentException("Map does not contain state "+state+"!");
}
}
}
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