EmptyModelFilter.java

/*
 * Copyright 2020 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.BasicModel;
import org.genesys.blocks.model.EmptyModel;

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

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

/**
 * {@link BasicModel} 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 EmptyModelFilter<T extends EmptyModelFilter<T, R>, R extends EmptyModel> extends SuperModelFilter<T, R> {

	private static final long serialVersionUID = 3547161067042415815L;
	/** The id. */
	public Set<Long> id;

	/**
	 * Collects list of filter predicates
	 *
	 * @param instance the instance of Q-type of <em>R</em>
	 * @return list of predicates
	 */
	protected List<Predicate> collectPredicates(final EntityPathBase<R> instance) {
		List<Predicate> predicates = super.collectPredicates(instance);

		if (CollectionUtils.isNotEmpty(this.id)) {
			PathBuilder<?> entityPath = new PathBuilder<>(instance.getType(), instance.getMetadata());
			PathBuilder<Long> idPath = entityPath.get("id", Long.class);
			predicates.add(idPath.in(this.id));
		}
		return predicates;
	}

}