io.evitadb.api.requestResponse.data.structure.SerializablePredicate Maven / Gradle / Ivy
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Module contains external API of the evitaDB.
/*
*
* _ _ ____ ____
* _____ _(_) |_ __ _| _ \| __ )
* / _ \ \ / / | __/ _` | | | | _ \
* | __/\ V /| | || (_| | |_| | |_) |
* \___| \_/ |_|\__\__,_|____/|____/
*
* Copyright (c) 2023
*
* Licensed under the Business Source License, Version 1.1 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://github.com/FgForrest/evitaDB/blob/master/LICENSE
*
* 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 io.evitadb.api.requestResponse.data.structure;
import io.evitadb.api.requestResponse.data.Droppable;
import java.io.Serial;
import java.io.Serializable;
import java.util.function.Predicate;
/**
* This interface defines a query that a predicate must be serializable. Using lambdas for this
* interface is discouraged - see: https://stackoverflow.com/questions/38018415/how-to-safely-serialize-a-lambda
*
* @author Jan Novotný ([email protected]), FG Forrest a.s. (c) 2021
*/
public interface SerializablePredicate extends Serializable, Predicate {
default SerializablePredicate or(SerializablePredicate other) {
return new OrPredicate<>(this, other);
}
default SerializablePredicate and(SerializablePredicate other) {
return new AndPredicate<>(this, other);
}
/**
* This predicate joins multiple predicates by OR relation.
*
* @author Jan Novotný ([email protected]), FG Forrest a.s. (c) 2021
*/
class OrPredicate implements SerializablePredicate {
@Serial private static final long serialVersionUID = -4534779807816763893L;
private final SerializablePredicate predicateA;
private final SerializablePredicate predicateB;
public OrPredicate(SerializablePredicate predicateA, SerializablePredicate predicateB) {
this.predicateA = predicateA;
this.predicateB = predicateB;
}
@Override
public boolean test(T t) {
return predicateA.test(t) || predicateB.test(t);
}
}
/**
* This predicate joins multiple predicates by OR relation.
*
* @author Jan Novotný ([email protected]), FG Forrest a.s. (c) 2021
*/
class AndPredicate implements SerializablePredicate {
@Serial private static final long serialVersionUID = -4534779807816763893L;
private final SerializablePredicate predicateA;
private final SerializablePredicate predicateB;
public AndPredicate(SerializablePredicate predicateA, SerializablePredicate predicateB) {
this.predicateA = predicateA;
this.predicateB = predicateB;
}
@Override
public boolean test(T t) {
return predicateA.test(t) && predicateB.test(t);
}
}
/**
* This predicate is true only when passed attribute exists.
*
* @author Jan Novotný ([email protected]), FG Forrest a.s. (c) 2021
*/
class ExistsPredicate implements SerializablePredicate {
private static final ExistsPredicate INSTANCE = new ExistsPredicate<>();
@Serial private static final long serialVersionUID = 7176072107501299504L;
public static ExistsPredicate instance() {
return (ExistsPredicate) INSTANCE;
}
@Override
public boolean test(T t) {
return t.exists();
}
}
}