org.dromara.hutool.db.handler.row.BeanRowHandler Maven / Gradle / Ivy
/*
* Copyright (c) 2013-2024 Hutool Team and hutool.cn
*
* 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 org.dromara.hutool.db.handler.row;
import org.dromara.hutool.core.bean.BeanUtil;
import org.dromara.hutool.core.bean.PropDesc;
import org.dromara.hutool.core.reflect.ConstructorUtil;
import org.dromara.hutool.core.reflect.TypeUtil;
import org.dromara.hutool.core.reflect.method.MethodUtil;
import org.dromara.hutool.core.text.StrUtil;
import org.dromara.hutool.db.handler.ResultSetUtil;
import java.lang.reflect.Method;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.Map;
/**
* 将{@link ResultSet}结果中的某行处理为Bean对象
*
* @param Bean类型
* @author looly
*/
public class BeanRowHandler extends AbsRowHandler {
private final Class beanType;
private final boolean caseInsensitive;
/**
* 构造
*
* @param meta {@link ResultSetMetaData}
* @param beanType Bean类型
* @param caseInsensitive 是否大小写不敏感
* @throws SQLException SQL异常
*/
public BeanRowHandler(final ResultSetMetaData meta, final Class beanType, final boolean caseInsensitive) throws SQLException {
super(meta);
this.beanType = beanType;
this.caseInsensitive = caseInsensitive;
}
@Override
public T handle(final ResultSet rs) throws SQLException {
//普通bean
final T bean = ConstructorUtil.newInstanceIfPossible(beanType);
final Map propMap = BeanUtil.getBeanDesc(beanType).getPropMap(this.caseInsensitive);
String columnLabel;
PropDesc pd;
Method setter;
Object value;
for (int i = 1; i <= columnCount; i++) {
columnLabel = meta.getColumnLabel(i);
pd = propMap.get(columnLabel);
if (null == pd) {
// 尝试驼峰命名风格
pd = propMap.get(StrUtil.toCamelCase(columnLabel));
}
setter = (null == pd) ? null : pd.getSetter();
if (null != setter) {
value = ResultSetUtil.getColumnValue(rs, i, meta.getColumnType(i), TypeUtil.getFirstParamType(setter));
MethodUtil.invokeWithCheck(bean, setter, value);
}
}
return bean;
}
}