/**
 * Licensed to Apereo under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright ownership. Apereo
 * licenses this file to you 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 the
 * following location:
 *
 * <p>http://www.apache.org/licenses/LICENSE-2.0
 *
 * <p>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 org.apereo.portal.layout.dlm.providers;

import java.util.LinkedList;
import java.util.List;
import javax.persistence.Cacheable;
import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.OneToMany;
import org.apereo.portal.layout.dlm.Evaluator;
import org.hibernate.annotations.Cache;
import org.hibernate.annotations.CacheConcurrencyStrategy;
import org.hibernate.annotations.IndexColumn;

/**
 * An {@link Evaluator} that contains a group of other evaluators
 *
 * @since 2.5
 */
@Entity
@Cacheable
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public abstract class EvaluatorGroup extends Evaluator {
    @OneToMany(
        targetEntity = Evaluator.class,
        cascade = CascadeType.ALL,
        fetch = FetchType.EAGER,
        orphanRemoval = true
    )
    @IndexColumn(name = "EVAL_INDEX")
    @JoinTable(
        name = "UP_DLM_EVALUATOR_PAREN",
        joinColumns = @JoinColumn(name = "PAREN_EVAL_ID"),
        inverseJoinColumns = @JoinColumn(name = "CHILD_EVAL_ID")
    )
    @Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
    protected List<Evaluator> evaluators = new LinkedList<Evaluator>();

    public void addEvaluator(Evaluator e) {
        this.evaluators.add(e);
    }
}