VersionedModelFilter.java

/*
 * Copyright 2019 Global Crop Diversity Trust
 *
 * 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 org.genesys.blocks.model.filters;

import java.util.List;
import java.util.Set;

import org.apache.commons.collections4.CollectionUtils;
import org.genesys.blocks.model.QVersionedModel;
import org.genesys.blocks.model.VersionedModel;

import com.querydsl.core.types.Predicate;
import com.querydsl.core.types.dsl.EntityPathBase;

import lombok.EqualsAndHashCode;
import lombok.Getter;
import lombok.Setter;
import lombok.experimental.Accessors;

/**
 * {@link VersionedModel} match by sample filters.
 *
 * @param <T> the generic type
 * @param <R> the generic type
 */
@Getter
@Setter
@EqualsAndHashCode(callSuper = true)
@Accessors(fluent = true)
public abstract class VersionedModelFilter<T extends VersionedModelFilter<T, R>, R extends VersionedModel> extends BasicModelFilter<T, R> {

    private static final long serialVersionUID = -4226770121644301621L;

    /** The version. */
    public Set<Integer> version;

    /** The active. */
    public Boolean active;

    /**
     * Collects list of filter predicates
     *
     * @param instance the instance of Q-type of <em>R</em>
     * @param versionedModel the versioned model
     * @return list of predicates
     */
    protected List<Predicate> collectPredicates(final EntityPathBase<R> instance, QVersionedModel versionedModel) {
        List<Predicate> predicates = super.collectPredicates(instance);
        if (CollectionUtils.isNotEmpty(version)) {
            predicates.add(versionedModel.version.in(version));
        }
        if (active != null) {
            predicates.add(versionedModel.active.eq(active));
        }
        return predicates;
    }

}