feat: add CommaSplitTypeHandler.java

mybatis-flex-core/src/main/java/com/mybatisflex/core/handler/CommaSplitTypeHandler.java

@@ -0,0 +1,71 @@
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  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
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  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 com.mybatisflex.core.handler;
+
+import org.apache.ibatis.type.JdbcType;
+import org.apache.ibatis.type.TypeHandler;
+
+import java.sql.CallableStatement;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.Arrays;
+import java.util.List;
+import java.util.StringJoiner;
+
+
+/**
+ * @author michael
+ */
+public class CommaSplitTypeHandler implements TypeHandler<List<String>> {
+
+    @Override
+    public void setParameter(PreparedStatement ps, int i, List<String> parameter, JdbcType jdbcType) throws SQLException {
+        if (parameter != null) {
+            StringJoiner stringJoiner = new StringJoiner(",");
+            parameter.forEach(stringJoiner::add);
+            ps.setString(i, stringJoiner.toString());
+        }
+    }
+
+    @Override
+    public List<String> getResult(ResultSet rs, String columnName) throws SQLException {
+        String columnValueStr = rs.getString(columnName);
+        if (columnValueStr != null) {
+            return Arrays.asList(columnValueStr.split(","));
+        }
+        return null;
+    }
+
+    @Override
+    public List<String> getResult(ResultSet rs, int columnIndex) throws SQLException {
+        String columnValueStr = rs.getString(columnIndex);
+        if (columnValueStr != null) {
+            return Arrays.asList(columnValueStr.split(","));
+        }
+        return null;
+    }
+
+    @Override
+    public List<String> getResult(CallableStatement cs, int columnIndex) throws SQLException {
+        String columnValueStr = cs.getString(columnIndex);
+        if (columnValueStr != null) {
+            return Arrays.asList(columnValueStr.split(","));
+        }
+        return null;
+    }
+
+}