cn.fastmc.core.jpa.specification.Specifications.java Source code

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Here is the source code for cn.fastmc.core.jpa.specification.Specifications.java

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/*
 * Copyright 2013-2014 the original author or authors.
 *
 * 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 cn.fastmc.core.jpa.specification;

import javax.persistence.criteria.Path;
import javax.persistence.criteria.Root;

import org.apache.commons.lang.StringUtils;
import org.springframework.data.jpa.domain.Specification;

import cn.fastmc.core.RestrictionNames;
import cn.fastmc.core.jpa.specification.support.PropertyFilterSpecification;
import cn.fastmc.core.pagination.GroupPropertyFilter;
import cn.fastmc.core.pagination.PropertyFilter.MatchType;

/**
 * Specification,PropertyFilter??Specification
 * 
 * @author maurice
 *
 */
@SuppressWarnings({ "rawtypes", "unchecked" })
public class Specifications {

    /**
     * ?Specification
     * 
     * @param filters ?
     * 
     * @return {@link Specification}
     */
    public static Specification get(GroupPropertyFilter filters) {
        return new PropertyFilterSpecification(filters);
    }

    /**
    * ??Specification
    * 
    * @param propertyName ??
    * @param value 
    * 
    * @return {@link Specification}
    */
    public static Specification get(String propertyName, Object value) {
        return get(propertyName, value, MatchType.EQ);
    }

    /**
     * ??Specification
     * 
     * @param propertyName ??
     * @param value 
     * @param restrictionName ????{@link RestrictionNames}
     * 
     * @return {@link Specification}
     */
    public static Specification get(String propertyName, Object value, MatchType restrictionName) {
        return new PropertyFilterSpecification(propertyName, value, restrictionName);
    }

    /**
     * ???
     * 
     * @param propertyName ??
     * @param root Query roots always reference entities
     * 
     * @return {@link Path}
     */
    public static Path<?> getPath(String propertyName, Root<?> root) {

        Path<?> path = null;

        if (StringUtils.contains(propertyName, ".")) {
            String[] propertys = StringUtils.splitByWholeSeparator(propertyName, ".");
            path = root.get(propertys[0]);
            for (int i = 1; i < propertys.length; i++) {
                path = path.get(propertys[i]);
            }
        } else {
            path = root.get(propertyName);
        }

        return path;
    }

}