CustomJPACriteriaVisitor.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF 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
 *
 * 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.apache.cxf.jaxrs.ext.search.jpa;

import jakarta.persistence.EntityManager;
import jakarta.persistence.criteria.Path;
import jakarta.persistence.criteria.Predicate;
import jakarta.persistence.metamodel.Attribute;
import jakarta.persistence.metamodel.Bindable;
import org.apache.cxf.jaxrs.ext.search.ConditionType;
import org.apache.cxf.jaxrs.ext.search.collections.CollectionCheckInfo;

public class CustomJPACriteriaVisitor extends JPACriteriaQueryVisitor<Book, Book> {

    CustomJPACriteriaVisitor(EntityManager em) {
        super(em, Book.class, Book.class);
    }

    @Override
    protected Predicate doBuildPredicate(ConditionType ct, Path<?> path, Class<?> valueClazz, Object value) {
        String name = getAttributeName(path);
        if ("bookTitle".equals(name)) {
            return getCriteriaBuilder().like(
                getCriteriaBuilder().lower(path.as(String.class)),
                "%" + value.toString().toLowerCase() + "%");
        }

        return super.doBuildPredicate(ct, path, valueClazz, value);
    }

    @Override
    protected Predicate doBuildCollectionPredicate(ConditionType ct, Path<?> path, CollectionCheckInfo collInfo) {
        return getCriteriaBuilder().disjunction();
    }

    private String getAttributeName(Path<?> path) {
        Bindable<?> model = path.getModel();
        if (model instanceof Attribute) {
            return ((Attribute<?, ?>)model).getName();
        }
        return null;
    }
}