com.hazelcast.query.impl.predicates.AbstractPredicate Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of hazelcast-java-client Show documentation
Hazelcast Java Client
The newest version!
/*
 * Copyright (c) 2008-2024, 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.internal.serialization.BinaryInterface;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;
import com.hazelcast.query.Predicate;

import java.io.IOException;
import java.util.Map;

import static com.hazelcast.internal.serialization.impl.FactoryIdHelper.PREDICATE_DS_FACTORY_ID;
import static com.hazelcast.query.impl.IndexUtils.canonicalizeAttribute;

/**
 * Provides base features for predicates, such as extraction and conversion of the attribute's value.
 * It also handles apply() on MultiResult.
 */
@BinaryInterface
public abstract class AbstractPredicate implements Predicate, IdentifiedDataSerializable {

    String attributeName;

    protected AbstractPredicate() {
    }

    protected AbstractPredicate(String attributeName) {
        this.attributeName = canonicalizeAttribute(attributeName);
    }

    @Override
    public boolean apply(Map.Entry mapEntry) {
        throw new UnsupportedOperationException();
    }

    @Override
    public void writeData(ObjectDataOutput out) throws IOException {
        out.writeString(attributeName);
    }

    @Override
    public void readData(ObjectDataInput in) throws IOException {
        attributeName = in.readString();
    }

    @Override
    public int getFactoryId() {
        return PREDICATE_DS_FACTORY_ID;
    }

    @Override
    public boolean equals(Object o) {
        if (!(o instanceof AbstractPredicate that)) {
            return false;
        }

        if (!that.canEqual(this)) {
            return false;
        }
        return attributeName != null ? attributeName.equals(that.attributeName) : that.attributeName == null;
    }

    @SuppressWarnings("BooleanMethodIsAlwaysInverted")
    public boolean canEqual(Object other) {
        return (other instanceof AbstractPredicate);
    }

    @Override
    public int hashCode() {
        return attributeName != null ? attributeName.hashCode() : 0;
    }

}