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/*
 * Copyright © 2017-2023 Ocado (Ocava)
 *
 * 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.ocadotechnology.indexedcache;

import java.util.function.Predicate;
import java.util.stream.Stream;

import javax.annotation.CheckForNull;

import com.ocadotechnology.id.Identified;

public final class DefaultPredicateIndex> extends AbstractIndex implements PredicateIndex {
    private final OneToManyIndex index;

    public DefaultPredicateIndex(Predicate predicate) {
        this(null, predicate);
    }

    public DefaultPredicateIndex(@CheckForNull String name, Predicate predicate) {
        super(name);
        this.index = OneToManyIndex.create(name, predicate::test);
    }

    @Override
    public Stream stream() {
        return index.stream(true);
    }

    @Override
    public int count() {
        return index.count(true);
    }

    @Override
    public Stream streamWhereNot() {
        return index.stream(false);
    }

    @Override
    public int countWhereNot() {
        return index.count(false);
    }

    @Override
    protected void add(C object) {
        index.add(object);
    }

    @Override
    protected void remove(C object) {
        index.remove(object);
    }

    @Override
    public boolean isEmpty() {
        return index.isEmpty(true);
    }
}