org.omnifaces.persistence.service.JoinFetchAdapter Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of omnipersistence Show documentation
Utilities for JPA, JDBC and DataSources
The newest version!
/*
 * Copyright 2021 OmniFaces
 *
 * 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
 *
 *     https://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.omnifaces.persistence.service;

import java.util.Set;

import jakarta.persistence.criteria.Fetch;
import jakarta.persistence.criteria.FetchParent;
import jakarta.persistence.criteria.Join;
import jakarta.persistence.criteria.JoinType;
import jakarta.persistence.metamodel.Attribute;
import jakarta.persistence.metamodel.PluralAttribute;
import jakarta.persistence.metamodel.SingularAttribute;

/**
 * This class adapts from {@link Join} to {@link Fetch}.
 * @see SubqueryRoot
 */
class JoinFetchAdapter implements Fetch {

	private Join join;

	public JoinFetchAdapter(Join join) {
		this.join = join;
	}

	@Override
	public Attribute getAttribute() {
		return join.getAttribute();
	}

	@Override
	public FetchParent getParent() {
		return join.getParent();
	}

	@Override
	public JoinType getJoinType() {
		return join.getJoinType();
	}

	@Override
	public Set> getFetches() {
		return join.getFetches();
	}

	@Override
	public  Fetch fetch(SingularAttribute attribute) {
		return new JoinFetchAdapter<>(join.join(attribute));
	}

	@Override
	public  Fetch fetch(SingularAttribute attribute, JoinType jt) {
		return new JoinFetchAdapter<>(join.join(attribute, jt));
	}

	@Override
	public  Fetch fetch(PluralAttribute attribute) {
		throw new UnsupportedOperationException();
	}

	@Override
	public  Fetch fetch(PluralAttribute attribute, JoinType jt) {
		throw new UnsupportedOperationException();
	}

	@Override
	@SuppressWarnings("hiding")
	public  Fetch fetch(String attributeName) {
		return new JoinFetchAdapter<>(join.join(attributeName));
	}

	@Override
	@SuppressWarnings("hiding")
	public  Fetch fetch(String attributeName, JoinType jt) {
		return new JoinFetchAdapter<>(join.join(attributeName, jt));
	}

}