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/*
* SPDX-FileCopyrightText: 2021-2023 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.store.query.view;
import tools.refinery.store.map.CursorAsIterator;
import tools.refinery.store.model.Model;
import tools.refinery.store.query.term.Parameter;
import tools.refinery.store.representation.Symbol;
import tools.refinery.store.tuple.Tuple;
import tools.refinery.store.tuple.Tuple1;
import java.util.Arrays;
import java.util.List;
import java.util.Objects;
import java.util.Set;
public abstract class TuplePreservingView<T> extends SymbolView<T> {
private final List<Parameter> parameters;
protected TuplePreservingView(Symbol<T> symbol, String name) {
super(symbol, name);
this.parameters = createParameters(symbol.arity());
}
protected TuplePreservingView(Symbol<T> symbol) {
super(symbol);
this.parameters = createParameters(symbol.arity());
}
public Object[] forwardMap(Tuple key) {
Object[] result = new Object[key.getSize()];
for (int i = 0; i < key.getSize(); i++) {
result[i] = Tuple.of(key.get(i));
}
return result;
}
@Override
public Object[] forwardMap(Tuple key, T value) {
return forwardMap(key);
}
@Override
public boolean get(Model model, Object[] tuple) {
int[] content = new int[tuple.length];
for (int i = 0; i < tuple.length; i++) {
if (!(tuple[i] instanceof Tuple1 wrapper)) {
return false;
}
content[i] = wrapper.value0();
}
Tuple key = Tuple.of(content);
T value = model.getInterpretation(getSymbol()).get(key);
return filter(key, value);
}
@Override
public boolean canIndexSlot(int slot) {
return slot >= 0 && slot < getSymbol().arity();
}
@Override
public Iterable<Object[]> getAdjacent(Model model, int slot, Object value) {
if (!(value instanceof Tuple1 tuple1)) {
return Set.of();
}
return (() -> new CursorAsIterator<>(model.getInterpretation(getSymbol()).getAdjacent(slot, tuple1.get(0)),
this::forwardMap, this::filter));
}
@Override
public List<Parameter> getParameters() {
return parameters;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
if (!super.equals(o)) return false;
TuplePreservingView<?> that = (TuplePreservingView<?>) o;
return Objects.equals(parameters, that.parameters);
}
@Override
public int hashCode() {
return Objects.hash(super.hashCode(), parameters);
}
private static List<Parameter> createParameters(int arity) {
var parameters = new Parameter[arity];
Arrays.fill(parameters, Parameter.NODE_OUT);
return List.of(parameters);
}
}
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