fix first npe

mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/apt/resultmap/MybatisLabel.java

@@ -251,7 +251,7 @@ public class MybatisLabel<E, T> implements Label<T> {
                         result.setBaseColumn(mybatisLabel.baseColumn);
                         result.setProperty(i.getColumProperty());
                         result.setJavaType(i.getColumnType());
-                        result.setJdbcType(Objects.isNull(i.getTableFieldInfo()) ? null : i.getTableFieldInfo().getJdbcType());
+                        result.setJdbcType(i.getJdbcType());
                         result.setSelectNormal(i);
                         return result;
                     }).collect(Collectors.toList()));

mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/apt/resultmap/Result.java

@@ -1,6 +1,5 @@
 package com.github.yulichang.wrapper.apt.resultmap;
 
-import com.baomidou.mybatisplus.core.metadata.TableFieldInfo;
 import com.baomidou.mybatisplus.core.toolkit.StringUtils;
 import com.baomidou.mybatisplus.core.toolkit.support.SFunction;
 import com.github.yulichang.apt.BaseColumn;
@@ -16,7 +15,6 @@ import org.apache.ibatis.type.JdbcType;
 
 import java.util.Map;
 import java.util.Objects;
-import java.util.Optional;
 
 /**
  * result 标签
@@ -71,7 +69,7 @@ public class Result implements IResult {
             result.selectNormal = selectCache;
             result.property = selectCache.getColumProperty();
             result.javaType = selectCache.getColumnType();
-            result.jdbcType = Optional.ofNullable(selectCache.getTableFieldInfo()).map(TableFieldInfo::getJdbcType).orElse(null);
+            result.jdbcType = selectCache.getJdbcType();
         }
 
         public Builder(boolean isId, BaseColumn<?> baseColumn, SelectCache selectCache) {
@@ -82,7 +80,7 @@ public class Result implements IResult {
             result.selectNormal = selectCache;
             result.property = selectCache.getColumProperty();
             result.javaType = selectCache.getColumnType();
-            result.jdbcType = Optional.ofNullable(selectCache.getTableFieldInfo()).map(TableFieldInfo::getJdbcType).orElse(null);
+            result.jdbcType = selectCache.getJdbcType();
         }
 
         public Builder<T> property(SFunction<T, ?> property) {
@@ -102,7 +100,7 @@ public class Result implements IResult {
                 result.javaType = normal.getColumnType();
             }
             if (Objects.isNull(result.jdbcType)) {
-                result.jdbcType = Objects.isNull(normal.getTableFieldInfo()) ? null : normal.getTableFieldInfo().getJdbcType();
+                result.jdbcType = normal.getJdbcType();
             }
             return this;
         }

mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/interfaces/Chain.java

@@ -1,10 +1,12 @@
 package com.github.yulichang.wrapper.interfaces;
 
 import com.baomidou.mybatisplus.core.metadata.IPage;
+import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
 import com.github.yulichang.interfaces.MPJBaseJoin;
 import com.github.yulichang.toolkit.SqlHelper;
 
 import java.util.List;
+import java.util.Optional;
 
 /**
  * 链式调用
@@ -62,7 +64,7 @@ public interface Chain<T> extends MPJBaseJoin<T> {
      * JoinWrappers.lambda(User.class)<br />
      */
     default T first() {
-        return list().stream().findFirst().orElse(null);
+        return Optional.of(list()).filter(CollectionUtils::isNotEmpty).map(m -> m.get(0)).orElse(null);
     }
 
     /**
@@ -73,7 +75,7 @@ public interface Chain<T> extends MPJBaseJoin<T> {
      * JoinWrappers.lambda(User.class)<br />
      */
     default <R> R first(Class<R> resultType) {
-        return list(resultType).stream().findFirst().orElse(null);
+        return Optional.of(list(resultType)).filter(CollectionUtils::isNotEmpty).map(m -> m.get(0)).orElse(null);
     }
 
     /**

mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/segments/Select.java

@@ -1,9 +1,9 @@
 package com.github.yulichang.wrapper.segments;
 
-import com.baomidou.mybatisplus.core.metadata.TableFieldInfo;
 import com.github.yulichang.apt.BaseColumn;
 import com.github.yulichang.apt.Column;
 import com.github.yulichang.wrapper.enums.BaseFuncEnum;
+import org.apache.ibatis.type.JdbcType;
 import org.apache.ibatis.type.TypeHandler;
 
 import java.io.Serializable;
@@ -42,7 +42,9 @@ public interface Select extends Serializable {
 
     String getAlias();
 
-    TableFieldInfo getTableFieldInfo();
+    Class<?> getPropertyType();
+
+    JdbcType getJdbcType();
 
     boolean isFunc();
 

mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/segments/SelectApt.java

@@ -1,11 +1,11 @@
 package com.github.yulichang.wrapper.segments;
 
-import com.baomidou.mybatisplus.core.metadata.TableFieldInfo;
 import com.github.yulichang.apt.BaseColumn;
 import com.github.yulichang.apt.Column;
 import com.github.yulichang.wrapper.enums.BaseFuncEnum;
 import lombok.Getter;
 import lombok.Setter;
+import org.apache.ibatis.type.JdbcType;
 import org.apache.ibatis.type.TypeHandler;
 
 /**
@@ -194,9 +194,17 @@ public class SelectApt implements Select {
     }
 
     @Override
-    public TableFieldInfo getTableFieldInfo() {
+    public Class<?> getPropertyType() {
         if (cache != null) {
-            return cache.getTableFieldInfo();
+            return cache.getPropertyType();
+        }
+        return null;
+    }
+
+    @Override
+    public JdbcType getJdbcType() {
+        if (cache != null) {
+            return cache.getJdbcType();
         }
         return null;
     }

mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/segments/SelectLabel.java

@@ -1,10 +1,10 @@
 package com.github.yulichang.wrapper.segments;
 
 
-import com.baomidou.mybatisplus.core.metadata.TableFieldInfo;
 import com.github.yulichang.apt.BaseColumn;
 import com.github.yulichang.wrapper.enums.BaseFuncEnum;
 import lombok.Getter;
+import org.apache.ibatis.type.JdbcType;
 import org.apache.ibatis.type.TypeHandler;
 
 /**
@@ -43,7 +43,7 @@ public class SelectLabel implements Select {
         this.baseColumn = baseColumn;
     }
 
-    public SelectLabel(SelectCache cache, Integer index, Class<?> tagClass, String column, boolean hasTableAlias, String tableAlias) {
+    public SelectLabel(SelectCache cache, Integer index, Class<?> tagClass, String column, boolean hasTableAlias, String tableAlias, BaseColumn<?> baseColumn) {
         this.cache = cache;
         this.index = index;
         this.tagClass = tagClass;