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A mybatis orm enhance framework.
/*
* Copyright 2020-2022 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
*
* 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 com.yuehuanghun.mybatis.milu.data;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import com.yuehuanghun.mybatis.milu.data.Sort.Direction;
import com.yuehuanghun.mybatis.milu.data.Sort.Order;
import com.yuehuanghun.mybatis.milu.tool.StringUtils;
/**
* 排序创建帮助类
* reference org.springframework.data.repository.query.parser.OrderBySource
* @author yuehuanghun
*
*/
public class OrderBySource {
private static final String BLOCK_SPLIT = "(?<=Asc|Desc)(?=\\p{Lu})";
private static final Pattern DIRECTION_SPLIT = Pattern.compile("(.+?)(Asc|Desc)?$");
private static final String INVALID_ORDER_SYNTAX = "Invalid order syntax for part %s!";
private static final Set DIRECTION_KEYWORDS = new HashSet(Arrays.asList("Asc", "Desc"));
private final List orders;
public OrderBySource(String clause) {
this(clause, null);
}
public OrderBySource(String clause, Class> domainClass) {
this.orders = new ArrayList();
for (String part : clause.split(BLOCK_SPLIT)) {
Matcher matcher = DIRECTION_SPLIT.matcher(part);
if (!matcher.find()) {
throw new IllegalArgumentException(String.format(INVALID_ORDER_SYNTAX, part));
}
String propertyString = matcher.group(1);
String directionString = matcher.group(2);
// No property, but only a direction keyword
if (DIRECTION_KEYWORDS.contains(propertyString) && directionString == null) {
throw new IllegalArgumentException(String.format(INVALID_ORDER_SYNTAX, part));
}
Direction direction = StringUtils.isNotBlank(directionString) ? Direction.fromString(directionString) : null;
this.orders.add(createOrder(propertyString, direction, domainClass));
}
}
private Order createOrder(String propertySource, Direction direction, Class> domainClass) {
return new Order(direction, StringUtils.uncapitalize(propertySource));
}
public Sort toSort() {
return this.orders.isEmpty() ? null : Sort.by(this.orders);
}
@Override
public String toString() {
return "Order By " + StringUtils.collectionToDelimitedString(orders, ", ");
}
}
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