com.hazelcast.query.impl.predicates.NotPredicate Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
*
* 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 com.hazelcast.query.impl.predicates;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.internal.serialization.BinaryInterface;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;
import com.hazelcast.query.Predicate;
import com.hazelcast.query.impl.Indexes;
import java.io.IOException;
import java.util.Map;
import static com.hazelcast.internal.serialization.impl.FactoryIdHelper.PREDICATE_DS_FACTORY_ID;
/**
* Not Predicate
*/
@BinaryInterface
public final class NotPredicate
implements Predicate, VisitablePredicate, NegatablePredicate, IdentifiedDataSerializable {
private static final long serialVersionUID = 1L;
protected Predicate predicate;
public NotPredicate(Predicate predicate) {
this.predicate = predicate;
}
public NotPredicate() {
}
public Predicate getPredicate() {
return predicate;
}
@Override
public boolean apply(Map.Entry mapEntry) {
return !predicate.apply(mapEntry);
}
@Override
public void writeData(ObjectDataOutput out) throws IOException {
out.writeObject(predicate);
}
@Override
public void readData(ObjectDataInput in) throws IOException {
predicate = in.readObject();
}
@Override
public String toString() {
return "NOT(" + predicate + ")";
}
@Override
public Predicate accept(Visitor visitor, Indexes indexes) {
Predicate target = predicate;
if (predicate instanceof VisitablePredicate) {
target = ((VisitablePredicate) predicate).accept(visitor, indexes);
}
if (target == predicate) {
// visitor didn't change the inner predicate
return visitor.visit(this, indexes);
}
// visitor returned a different copy of the inner predicate.
// We have to create our copy with the new inner predicate to maintained immutability
NotPredicate copy = new NotPredicate(target);
return visitor.visit(copy, indexes);
}
@Override
public Predicate negate() {
return predicate;
}
@Override
public int getFactoryId() {
return PREDICATE_DS_FACTORY_ID;
}
@Override
public int getClassId() {
return PredicateDataSerializerHook.NOT_PREDICATE;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || !(o instanceof NotPredicate)) {
return false;
}
NotPredicate that = (NotPredicate) o;
return predicate != null ? predicate.equals(that.predicate) : that.predicate == null;
}
@Override
public int hashCode() {
return predicate != null ? predicate.hashCode() : 0;
}
}