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/**
 *
 * Copyright (c) 2006-2016, Speedment, 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.speedment.internal.core.manager;

import com.speedment.Speedment;
import com.speedment.encoder.JsonEncoder;
import com.speedment.field.trait.ComparableFieldTrait;
import com.speedment.field.trait.FieldTrait;
import com.speedment.field.trait.ReferenceFieldTrait;
import com.speedment.internal.core.runtime.AbstractLifecycle;
import com.speedment.internal.util.Lazy;
import com.speedment.manager.Manager;
import com.speedment.stream.StreamDecorator;
import static java.util.Objects.requireNonNull;
import java.util.Optional;
import java.util.stream.Stream;

/**
 *
 * @author          Emil Forslund
 * @param   entity type for this Manager
 */
public abstract class AbstractManager extends AbstractLifecycle> implements Manager {

    protected final Speedment speedment;
    private final Lazy> encoder;

    protected AbstractManager(Speedment speedment) {
        this.speedment = requireNonNull(speedment);
        this.encoder   = Lazy.create();
    }

    @Override
    public String toJson(ENTITY entity) {
        requireNonNull(entity);
        return encoder.getOrCompute(() -> JsonEncoder.allOf(this)).apply(entity);
    }

    @Override
    public Stream stream(StreamDecorator decorator) {
        return speedment.getStreamSupplierComponent()
                .stream(getEntityClass(), decorator);
    }

    @Override
    public , 
    F extends FieldTrait & ReferenceFieldTrait & ComparableFieldTrait> 
    Optional findAny(F field, V value) {
        
        requireNonNull(field);
        return speedment.getStreamSupplierComponent()
                .findAny(getEntityClass(), field, value);
    }

    @Override
    public Speedment speedment() {
        return speedment;
    }
    
}