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io.github.jinghui70.rainbow.dbaccess.SqlWrapper Maven / Gradle / Ivy
package io.github.jinghui70.rainbow.dbaccess;
import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.StrUtil;
import io.github.jinghui70.rainbow.dbaccess.cnd.Cnd;
import io.github.jinghui70.rainbow.dbaccess.cnd.Op;
import io.github.jinghui70.rainbow.dbaccess.enumSupport.EnumMapper;
import io.github.jinghui70.rainbow.dbaccess.fieldmapper.FieldMapper;
import io.github.jinghui70.rainbow.dbaccess.mapper.MapRowMapper;
import io.github.jinghui70.rainbow.dbaccess.mapper.SingleColumnFieldRowMapper;
import io.github.jinghui70.rainbow.dbaccess.object.BeanMapper;
import io.github.jinghui70.rainbow.utils.StringBuilderWrapper;
import io.github.jinghui70.rainbow.utils.TreeNode;
import io.github.jinghui70.rainbow.utils.WrapTreeNode;
import org.springframework.beans.BeanUtils;
import org.springframework.dao.DataAccessException;
import org.springframework.dao.EmptyResultDataAccessException;
import org.springframework.jdbc.core.RowCallbackHandler;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.SingleColumnRowMapper;
import java.time.LocalDate;
import java.util.*;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.function.Supplier;
/**
* 封装了一个Sql的内容对象
*
* @author lijinghui
*/
@SuppressWarnings({"unchecked"})
public abstract class SqlWrapper> extends StringBuilderWrapper {
protected Dba dba;
protected Range range; // 查询范围
private boolean where;
private boolean set;
protected SqlWrapper() {
super();
}
protected SqlWrapper(String str) {
super(str);
}
protected SqlWrapper(Dba dba) {
this.dba = dba;
}
/**
* 获取当前拼的sql内容
*
* @return sql
*/
public String getSql() {
String sql = sb.toString();
if (range == null) return sql;
if (range.getFrom() == null) return dba.getDialect().wrapLimitSql(sql, range.getTo());
return dba.getDialect().wrapRangeSql(sql, range.getFrom(), range.getTo());
}
/**
* 复用当前对象，重新设置sql内容
*
* @param sql 新的sql
*/
public void setSql(String sql) {
sb.setLength(0);
sb.append(sql);
}
/**
* 添加一个条件
*
* @param cnd 条件对象
* @return 返回自己
*/
public abstract S append(Cnd cnd);
/**
* 拼 from table
*
* @param table 表名
* @return 返回自己
*/
public S from(String table) {
return append(" FROM ").append(table);
}
/**
* 判断是不是第一个set
*/
protected void set() {
if (set)
append(",");
else {
append(" SET ");
set = true;
}
}
/**
* 拼update语句的一个set部分
*
* @param field 字段
* @param value 新值
* @return 返回自己
*/
public abstract S set(String field, Object value);
/**
* 拼update语句的一个set部分，用于上一个方法不方便的时候。比如 set a = a + ?, 或者 a=a+:deltaA
*
* @param set 需要set的内容
* @return 返回自己
*/
public S set(String set) {
set();
return append(set);
}
/**
* 判断是不是第一个where
*/
protected void where() {
if (where) {
append(Cnd.AND);
} else {
append(Cnd.WHERE);
where = true;
}
}
/**
* 添加一个条件，需要自己处理条件内容，比如 where("a=1")或者where("a=?").addParam(1)
*
* @param cnd 条件字符串
* @return 返回自己
*/
public S where(String cnd) {
where();
return append(cnd);
}
/**
* 添加条件列表
*
* @param cnds 条件列表
* @return 返回自己
*/
public S where(Collection cnds) {
if (CollUtil.isNotEmpty(cnds))
for (Cnd cnd : cnds) {
where();
append(cnd);
}
return (S) this;
}
public S where(Cnd cnd) {
where();
append(cnd);
return (S) this;
}
public S where(String field, Object value) {
return where(true, field, Op.EQ, value);
}
public S where(boolean condition, String field, Object value) {
return where(condition, field, Op.EQ, value);
}
@Deprecated
public S where(String field, String op, Object value) {
return where(new Cnd(field, op, value));
}
public S where(String field, Op op, Object value) {
return where(true, field, op, value);
}
public S where(boolean condition, String field, Op op, Object value) {
if (condition) where(new Cnd(field, op, value));
return (S) this;
}
/**
* AND + 添加条件列表
*
* @param cnds 条件列表
* @return 返回自己
*/
public S and(Collection cnds) {
return where(cnds);
}
/**
* 添加一个And条件
*
* @param cnd 条件字符串
* @return 返回自己
*/
public S and(String cnd) {
return where(cnd);
}
public S and(Cnd cnd) {
return where(cnd);
}
public S and(String field, Object value) {
return where(true, field, Op.EQ, value);
}
public S and(boolean condition, String field, Object value) {
return where(condition, field, Op.EQ, value);
}
@Deprecated
public S and(String field, String op, Object value) {
return where(field, op, value);
}
public S and(String field, Op op, Object value) {
return where(true, field, op, value);
}
public S and(boolean condition, String field, Op op, Object value) {
return where(condition, field, op, value);
}
public S or(String cnd) {
append(Cnd.OR);
return append(cnd);
}
public S or(Cnd cnd) {
append(Cnd.OR);
return append(cnd);
}
public S or(String field, Object value) {
return or(true, field, Op.EQ, value);
}
public S or(boolean condition, String field, Object value) {
return or(condition, field, Op.EQ, value);
}
@Deprecated
public S or(String field, String op, Object value) {
return or(new Cnd(field, op, value));
}
public S or(String field, Op op, Object value) {
return or(true, field, op, value);
}
public S or(boolean condition, String field, Op op, Object value) {
if (condition) {
or(new Cnd(field, op, value));
}
return (S) this;
}
public S orderBy(String fields) {
if (StrUtil.isNotBlank(fields))
return append(" ORDER BY ").append(fields);
return (S) this;
}
public S groupBy(String fields) {
return append(" GROUP BY ").append(fields);
}
/**
* 查询并按回调函数进行结果处理
*
* @param rch 处理每行数据的回调函数
*/
public abstract void query(RowCallbackHandler rch);
/**
* 查询一条记录的一个字段，由派生类实现。
*
* @param requiredType 数据类型
* @param 数据泛型
* @return 查询结果
* @throws DataAccessException 底层异常
*/
@SuppressWarnings("rawtypes")
private RowMapper typeToMapper(Class requiredType) {
return requiredType.isEnum()
? new SingleColumnFieldRowMapper(new EnumMapper(requiredType))
: new SingleColumnRowMapper<>(requiredType);
}
public T queryForValue(Class requiredType) throws DataAccessException {
return queryForObject(typeToMapper(requiredType));
}
public Optional queryForValueOptional(Class requiredType) throws DataAccessException {
try {
return Optional.ofNullable(queryForValue(requiredType));
} catch (EmptyResultDataAccessException e) {
return Optional.empty();
}
}
public T queryForValue(FieldMapper mapper) throws DataAccessException {
return queryForObject(new SingleColumnFieldRowMapper(mapper));
}
public Optional queryForValueOptional(FieldMapper mapper) throws DataAccessException {
try {
return Optional.ofNullable(queryForValue(mapper));
} catch (EmptyResultDataAccessException e) {
return Optional.empty();
}
}
public String queryForString() {
return queryForValueOptional(String.class).orElse(StrUtil.EMPTY);
}
public Optional queryForStringOptional() {
return queryForValueOptional(String.class);
}
public int queryForInt() {
return queryForValueOptional(Integer.class).orElse(0);
}
public Optional queryForIntOptional() {
return queryForValueOptional(Integer.class);
}
public double queryForDouble() {
return queryForValueOptional(Double.class).orElse(0.0);
}
public Optional queryForDoubleOptional() {
return queryForValueOptional(Double.class);
}
public LocalDate queryForDate() {
return queryForValue(LocalDate.class);
}
public Optional queryForDateOptional() {
return queryForValueOptional(LocalDate.class);
}
protected abstract T queryForObject(String sql, RowMapper mapper) throws DataAccessException;
public T queryForObject(RowMapper mapper) throws DataAccessException {
return queryForObject(getSql(), mapper);
}
public Optional queryForObjectOptional(RowMapper mapper) throws DataAccessException {
try {
return Optional.ofNullable(queryForObject(mapper));
} catch (EmptyResultDataAccessException e) {
return Optional.empty();
}
}
public T queryForObject(Class objectType) throws DataAccessException {
if (BeanUtils.isSimpleValueType(objectType))
return queryForValue(objectType);
return queryForObject(BeanMapper.of(objectType));
}
public Optional queryForObjectOptional(Class objectType) throws DataAccessException {
if (BeanUtils.isSimpleValueType(objectType))
return queryForValueOptional(objectType);
return queryForObjectOptional(BeanMapper.of(objectType));
}
public Map queryForMap() throws DataAccessException {
Map result = queryForObject(MapRowMapper.INSTANCE);
return result == null ? Collections.emptyMap() : result;
}
/**
* 获取对象列表
*
* @param rowMapper 对象Mapper
* @param 对象泛型
* @return 结果列表
* @throws DataAccessException 数据底层异常
*/
protected abstract List queryForList(String sql, RowMapper rowMapper);
public List queryForList(RowMapper rowMapper) {
return queryForList(getSql(), rowMapper);
}
/**
* 查询一个对象列表
*
* @param objectType 对象类型
* @param 类型泛型
* @return 结果列表
* @throws DataAccessException 数据底层异常
*/
public List queryForList(Class objectType) throws DataAccessException {
if (BeanUtils.isSimpleValueType(objectType))
return queryForList(typeToMapper(objectType));
return queryForList(BeanMapper.of(objectType));
}
public List queryForList(FieldMapper fieldMapper) throws DataAccessException {
return queryForList(new SingleColumnFieldRowMapper<>(fieldMapper));
}
public int count() {
String sql = getSql().toLowerCase();
if (sql.contains("distinct") || sql.contains("group by") || sql.contains("union")) {
sql = String.format("SELECT COUNT(*) FROM (%s) C", sql);
} else {
int orderBy = sql.lastIndexOf(" order by");
sql = "select count(1) " + sql.substring(sql.indexOf("from"), orderBy > 0 ? orderBy : sql.length());
}
return queryForObject(sql, new SingleColumnRowMapper<>(Integer.class));
}
public Map queryToMap(ResultSetFunction keyFunc, ResultSetFunction valueFunction) {
Map result = new HashMap<>();
query((rs) -> {
K key = keyFunc.apply(rs);
V value = valueFunction.apply(rs);
result.put(key, value);
});
return result;
}
public Map queryToMap(ResultSetFunction keyFunc, RowMapper rowMapper, Supplier> supplier) {
Map result = supplier.get();
AtomicInteger rowNum = new AtomicInteger(0);
query((rs) -> {
K key = keyFunc.apply(rs);
V value = rowMapper.mapRow(rs, rowNum.getAndIncrement());
result.put(key, value);
});
return result;
}
public Map queryToMap(ResultSetFunction keyFunc, RowMapper rowMapper) {
return queryToMap(keyFunc, rowMapper, HashMap::new);
}
public Map queryToMap(ResultSetFunction keyFunc, Class clazz, Supplier> supplier) {
return queryToMap(keyFunc, BeanMapper.of(clazz), supplier);
}
public Map queryToMap(ResultSetFunction keyFunc, Class clazz) {
return queryToMap(keyFunc, BeanMapper.of(clazz));
}
public Map> queryToGroup(ResultSetFunction keyFunc, RowMapper rowMapper) {
Map> result = new HashMap<>();
AtomicInteger rowNum = new AtomicInteger(1);
query((rs) -> {
K key = keyFunc.apply(rs);
List list = result.computeIfAbsent(key, (k) -> new ArrayList<>());
T value = rowMapper.mapRow(rs, rowNum.getAndIncrement());
list.add(value);
});
return result;
}
public Map> queryToGroup(ResultSetFunction keyFunc, Class clazz) {
return queryToGroup(keyFunc, BeanMapper.of(clazz));
}
public Map> queryToGroup(ResultSetFunction keyFunc, ResultSetFunction valueFunc) {
Map> result = new HashMap<>();
query((rs) -> {
K key = keyFunc.apply(rs);
List list = result.computeIfAbsent(key, (k) -> new ArrayList<>());
T value = valueFunc.apply(rs);
list.add(value);
});
return result;
}
public PageData pageQuery(RowMapper mapper, int pageNo, int pageSize) {
int count = count();
if (count == 0 || count <= (pageNo - 1) * pageSize)
return new PageData<>(count);
String sql = pageNo == 1 ? dba.getDialect().wrapLimitSql(getSql(), pageSize)
: dba.getDialect().wrapPagedSql(getSql(), pageNo, pageSize);
List list = queryForList(sql, mapper);
return new PageData<>(count, list);
}
public PageData pageQuery(Class objectType, int pageNo, int pageSize) {
if (BeanUtils.isSimpleValueType(objectType)) {
int count = count();
if (count == 0 || count <= (pageNo - 1) * pageSize)
return new PageData<>(count);
String sql = pageNo == 1 ? dba.getDialect().wrapLimitSql(getSql(), pageSize)
: dba.getDialect().wrapPagedSql(getSql(), pageNo, pageSize);
List list = queryForList(sql, typeToMapper(objectType));
return new PageData<>(count, list);
}
return pageQuery(BeanMapper.of(objectType), pageNo, pageSize);
}
public > List queryForTree(Class objectType) {
return queryForTree(BeanMapper.of(objectType));
}
public List> queryForWrapTree(Class objectType) {
return queryForWrapTree(BeanMapper.of(objectType));
}
public List> queryForWrapTree(RowMapper mapper) {
return queryForTree((rs, rowNum) -> new WrapTreeNode<>(mapper.mapRow(rs, rowNum)));
}
public > List queryForTree(RowMapper mapper) {
List result = new ArrayList<>();
Map parentIdMap = new LinkedHashMap<>();
Map itemMap = new HashMap<>();
AtomicInteger row = new AtomicInteger(1);
query(rs -> {
String pid = rs.getString("PID");
String id = rs.getString("ID");
parentIdMap.put(id, pid);
T item = mapper.mapRow(rs, row.getAndIncrement());
itemMap.put(id, item);
});
for (Map.Entry entry : parentIdMap.entrySet()) {
String id = entry.getKey();
String pid = entry.getValue();
T item = itemMap.get(id);
T parent = itemMap.get(pid);
if (parent == null) {
result.add(item);
} else
parent.addChild(item);
}
return result;
}
public List> queryForTree(MapRowMapper mapper) {
List> result = new ArrayList<>();
Map parentIdMap = new LinkedHashMap<>();
Map> itemMap = new HashMap<>();
AtomicInteger row = new AtomicInteger(1);
query(rs -> {
String pid = rs.getString("PID");
String id = rs.getString("ID");
parentIdMap.put(id, pid);
Map item = mapper.mapRow(rs, row.getAndIncrement());
itemMap.put(id, item);
});
for (Map.Entry entry : parentIdMap.entrySet()) {
String id = entry.getKey();
String pid = entry.getValue();
Map item = itemMap.get(id);
Map parent = itemMap.get(pid);
if (parent == null) {
result.add(item);
} else {
List> children = (List>) parent.computeIfAbsent("children",
k -> new ArrayList>());
children.add(item);
}
}
return result;
}
@Override
public S limit(int limit) {
return range(null, limit);
}
public S range(Integer from, int to) {
this.range = Range.of(from, to);
return (S) this;
}
public abstract int execute();
}
