001/*
002 *  Copyright (c) 2022-2025, Mybatis-Flex (fuhai999@gmail.com).
003 *  <p>
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *  <p>
008 *  http://www.apache.org/licenses/LICENSE-2.0
009 *  <p>
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package com.mybatisflex.core.update;
017
018import com.mybatisflex.core.util.FieldWrapper;
019import com.mybatisflex.core.util.StringUtil;
020import org.apache.ibatis.javassist.util.proxy.MethodHandler;
021
022import java.lang.reflect.Method;
023import java.util.LinkedHashMap;
024import java.util.Map;
025
026class ModifyAttrsRecordHandler implements MethodHandler {
027
028    /**
029     * 更新的字段和内容
030     */
031    private final Map<String, Object> updates = new LinkedHashMap<>();
032
033    public Map<String, Object> getUpdates() {
034        return updates;
035    }
036
037    @Override
038    public Object invoke(Object self, Method originalMethod, Method proxyMethod, Object[] args) throws Throwable {
039
040        String methodName = originalMethod.getName();
041        if (methodName.startsWith("set")
042            && methodName.length() > 3
043            && Character.isUpperCase(methodName.charAt(3))
044            && originalMethod.getParameterCount() == 1) {
045
046            String property = StringUtil.firstCharToLowerCase(originalMethod.getName().substring(3));
047
048            //标识 @Column(ignore=true) 的字段，不去更新
049            FieldWrapper fw = FieldWrapper.of(originalMethod.getDeclaringClass(), property);
050            if (fw != null && fw.isIgnore()) {
051                return proxyMethod.invoke(self, args);
052            }
053
054            //用 fw.getField().getName() 的原因是 property 可能获取的内容不正确，比如 ID 会得到的内容为 iD
055            updates.put(fw == null ? property : fw.getField().getName(), args[0]);
056        }
057
058        return proxyMethod.invoke(self, args);
059    }
060
061
062}