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com.github.yulichang.wrapper.interfaces.QueryLabel Maven / Gradle / Ivy
An enhanced toolkit of Mybatis-Plus to simplify development.
package com.github.yulichang.wrapper.interfaces;
import com.baomidou.mybatisplus.core.toolkit.Assert;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.core.toolkit.support.SFunction;
import com.github.yulichang.toolkit.LambdaUtils;
import com.github.yulichang.toolkit.MPJReflectionKit;
import com.github.yulichang.toolkit.support.FieldCache;
import com.github.yulichang.wrapper.resultmap.Label;
import com.github.yulichang.wrapper.resultmap.MFunc;
import com.github.yulichang.wrapper.resultmap.MybatisLabel;
import com.github.yulichang.wrapper.resultmap.MybatisLabelFree;
import java.util.Collection;
import java.util.Map;
/**
* 对一或对多查询
*
* @author yulichang
* @since 1.3.0
*/
@SuppressWarnings({"unchecked", "unused", "DuplicatedCode"})
public interface QueryLabel {
void addLabel(Label label);
Children getChildren();
/**
* 一对多查询 调用此方法发必需要调用对应的 left join / right join ... 连表方法，否则会报错
*
* 举例 UserDO AddressDO 为一对多关系 UserDTO 为结果类
*
* MPJLambdaQueryWrapper wrapper = new MPJLambdaQueryWrapper();
* wrapper.selectAll(UserDO.class)
* .selectCollection(AddressDO.class, UserDTO::getAddressListDTO)
* .leftJoin(AddressDO.class, ...... )
* .eq(...)
* ...
* 的方式映射到UserDTO.addressListDTO属性中
*
* @since 1.3.0
*
* @param child 连表数据库实体类
* @param dtoField 包装类对应的属性
* @param 包装类
* @param 对多数据库实体类
* @param 包装类集合泛型
* @param 包装类集合字段泛型
*/
default > Children selectCollection(Class child, SFunction dtoField) {
return selectCollection(null, child, dtoField);
}
default > Children selectCollection(String prefix, Class child, SFunction dtoField) {
String dtoFieldName = LambdaUtils.getName(dtoField);
Class dtoClass = LambdaUtils.getEntityClass(dtoField);
Map fieldMap = MPJReflectionKit.getFieldMap(dtoClass);
FieldCache field = fieldMap.get(dtoFieldName);
Class genericType = MPJReflectionKit.getGenericType(field.getField());
MybatisLabel.Builder builder;
if (genericType == null || genericType.isAssignableFrom(child)) {
//找不到集合泛型 List List List ， 直接查询数据库实体
builder = new MybatisLabel.Builder<>(prefix, dtoFieldName, child, field.getType());
} else {
Class ofType = (Class) genericType;
builder = new MybatisLabel.Builder<>(prefix, dtoFieldName, child, field.getType(), ofType, true);
}
addLabel(builder.build());
return getChildren();
}
/**
* 一对多查询 调用此方法发必需要调用对应的 left join / right join ... 连表方法，否则会报错
*
* 举例 UserDO AddressDO 为一对多关系 UserDTO 为结果类
*
* MPJLambdaQueryWrapper wrapper = new MPJLambdaQueryWrapper();
* wrapper.selectAll(UserDO.class)
* .selectCollection(AddressDO.class, UserDTO::getAddressListDTO, map -> map
* .id(AddressDO::getId, AddressDTO::getId) //如果属性名一致 可以传一个
* .result(AddressDO::getUserId) //如果属性名一致 可以传一个
* .result(AddressDO::getAddress, AddressDTO::getAddress))) //如果属性名一致 可以传一个
* .leftJoin(AddressDO.class, ...... )
* .eq(...)
* ...
* 的方式映射到UserDTO.addressListDTO属性中
*
* @since 1.3.0
*
* @param child 连表数据库实体类
* @param dtoField 包装类对应的属性
* @param collection collection标签内容
* @param 包装类
* @param 对多数据库实体类
* @param 包装类集合泛型
* @param 包装类集合字段泛型
*/
default > Children selectCollection(Class child,
SFunction dtoField,
MFunc> collection) {
return selectCollection(null, child, dtoField, collection);
}
default > Children selectCollection(SFunction dtoField,
MFunc> collection) {
//自由映射必须存在泛型Z
String dtoFieldName = LambdaUtils.getName(dtoField);
Class dtoClass = LambdaUtils.getEntityClass(dtoField);
FieldCache field = MPJReflectionKit.getFieldMap(dtoClass).get(dtoFieldName);
//获取集合泛型
Class genericType = MPJReflectionKit.getGenericType(field.getField());
Class ofType = (Class) genericType;
MybatisLabelFree.Builder builder = new MybatisLabelFree.Builder<>(dtoFieldName, field.getType(), ofType);
MybatisLabelFree.Builder czBuilder = collection.apply(builder);
addLabel(czBuilder.build());
return getChildren();
}
default > Children selectCollection(String prefix,
Class child,
SFunction dtoField,
MFunc> collection) {
String dtoFieldName = LambdaUtils.getName(dtoField);
Class dtoClass = LambdaUtils.getEntityClass(dtoField);
FieldCache field = MPJReflectionKit.getFieldMap(dtoClass).get(dtoFieldName);
//获取集合泛型
Class genericType = MPJReflectionKit.getGenericType(field.getField());
Class ofType = (Class) genericType;
MybatisLabel.Builder builder = new MybatisLabel.Builder<>(prefix, dtoFieldName, child, field.getType(), ofType, false);
MybatisLabel.Builder czBuilder = collection.apply(builder);
addLabel(czBuilder.build());
return getChildren();
}
/**
* 对一查询 用法参考 selectCollection
*
* @since 1.3.0
*/
default Children selectAssociation(Class child, SFunction dtoField) {
return selectAssociation(null, child, dtoField);
}
default Children selectAssociation(String prefix, Class child, SFunction dtoField) {
String dtoFieldName = LambdaUtils.getName(dtoField);
Class dtoClass = LambdaUtils.getEntityClass(dtoField);
Map fieldMap = MPJReflectionKit.getFieldMap(dtoClass);
FieldCache field = fieldMap.get(dtoFieldName);
Assert.isFalse(Collection.class.isAssignableFrom(field.getType()), "association 不支持集合类");
MybatisLabel.Builder builder;
builder = new MybatisLabel.Builder<>(StringUtils.isBlank(prefix) ? null : prefix,
dtoFieldName, child, field.getType(), (Class) field.getType(), true);
addLabel(builder.build());
return getChildren();
}
/**
* 对一查询 用法参考 selectCollection
*
* @since 1.3.0
*/
default Children selectAssociation(Class child, SFunction dtoField,
MFunc> collection) {
return selectAssociation(null, child, dtoField, collection);
}
default Children selectAssociation(SFunction dtoField,
MFunc> collection) {
String dtoFieldName = LambdaUtils.getName(dtoField);
Class dtoClass = LambdaUtils.getEntityClass(dtoField);
FieldCache field = MPJReflectionKit.getFieldMap(dtoClass).get(dtoFieldName);
Assert.isFalse(Collection.class.isAssignableFrom(field.getType()), "association 不支持集合类");
MybatisLabelFree.Builder builder = new MybatisLabelFree.Builder<>(dtoFieldName, field.getType(), (Class) field.getType());
MybatisLabelFree.Builder cfBuilder = collection.apply(builder);
addLabel(cfBuilder.build());
return getChildren();
}
default Children selectAssociation(String prefix, Class child, SFunction dtoField,
MFunc> collection) {
String dtoFieldName = LambdaUtils.getName(dtoField);
Class dtoClass = LambdaUtils.getEntityClass(dtoField);
FieldCache field = MPJReflectionKit.getFieldMap(dtoClass).get(dtoFieldName);
Assert.isFalse(Collection.class.isAssignableFrom(field.getType()), "association 不支持集合类");
MybatisLabel.Builder builder = new MybatisLabel.Builder<>(StringUtils.isBlank(prefix) ? null : prefix,
dtoFieldName, child, field.getType(), (Class) field.getType(), false);
MybatisLabel.Builder cfBuilder = collection.apply(builder);
addLabel(cfBuilder.build());
return getChildren();
}
}
