add: Row.toObject() method

mybatis-flex-core/src/main/java/com/mybatisflex/core/row/Row.java

@@ -19,10 +19,7 @@ import com.mybatisflex.core.javassist.ModifyAttrsRecord;
 import com.mybatisflex.core.query.QueryColumn;
 import com.mybatisflex.core.table.TableInfo;
 import com.mybatisflex.core.table.TableInfoFactory;
-import com.mybatisflex.core.util.ArrayUtil;
+import com.mybatisflex.core.util.*;
-import com.mybatisflex.core.util.ConvertUtil;
-import com.mybatisflex.core.util.SqlUtil;
-import com.mybatisflex.core.util.StringUtil;
 
 import java.math.BigDecimal;
 import java.math.BigInteger;
@@ -282,6 +279,12 @@ public class Row extends HashMap<String, Object> implements ModifyAttrsRecord {
         return tableInfo.newInstanceByRow(this);
     }
 
+    public <T> T toObject(Class<T> objectClass) {
+        Object instance = ClassUtil.newInstance(objectClass);
+        RowSetter.setObject(this, instance);
+        return (T) instance;
+    }
+
     public Map<String, Object> toCamelKeysMap() {
         Map<String, Object> ret = new HashMap<>();
         for (String key : keySet()) {

mybatis-flex-core/src/main/java/com/mybatisflex/core/row/RowSetter.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.row;
+
+import com.mybatisflex.core.util.ClassUtil;
+import com.mybatisflex.core.util.ConvertUtil;
+import com.mybatisflex.core.util.StringUtil;
+import org.apache.ibatis.util.MapUtil;
+
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+class RowSetter {
+
+    static Map<Class<?>, Map<String, Method>> getterMethods = new ConcurrentHashMap<>();
+
+    static void setObject(Row row, Object toObject) {
+        Map<String, Method> setterMethods = getSetterMethods(toObject.getClass());
+        row.forEach((column, columnValue) -> {
+            Method setter = setterMethods.get(column);
+            try {
+                if (setter != null) {
+                    Object value = ConvertUtil.convert(columnValue, setter.getParameterTypes()[0]);
+                    setter.invoke(toObject, value);
+                }
+            } catch (Exception e) {
+                throw new RuntimeException("Can not invoke method: " + setter);
+            }
+        });
+    }
+
+
+    private static Map<String, Method> getSetterMethods(Class<?> aClass) {
+        return MapUtil.computeIfAbsent(getterMethods, aClass, aClass1 -> {
+            Map<String, Method> getterMethodsMapping = new HashMap<>();
+            List<Method> setters = ClassUtil.getAllMethods(aClass1,
+                    method -> method.getName().startsWith("set")
+                            && method.getParameterCount() == 1
+                            && Modifier.isPublic(method.getModifiers())
+            );
+            for (Method setter : setters) {
+                String column = setter.getName().substring(3);
+                getterMethodsMapping.put(column, setter);
+                getterMethodsMapping.put(column.toLowerCase(), setter);
+                getterMethodsMapping.put(column.toUpperCase(), setter);
+                getterMethodsMapping.put(StringUtil.firstCharToLowerCase(column), setter);
+                getterMethodsMapping.put(StringUtil.camelToUnderline(column), setter);
+                getterMethodsMapping.put(StringUtil.camelToUnderline(column).toUpperCase(), setter);
+                getterMethodsMapping.put(StringUtil.underlineToCamel(column), setter);
+            }
+            return getterMethodsMapping;
+        });
+    }
+}

mybatis-flex-core/src/main/java/com/mybatisflex/core/util/ClassUtil.java

@@ -16,13 +16,11 @@
 package com.mybatisflex.core.util;
 
 
-import java.lang.reflect.Constructor;
+import java.lang.reflect.*;
-import java.lang.reflect.Field;
-import java.lang.reflect.Modifier;
-import java.lang.reflect.Proxy;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import java.util.function.Predicate;
 
 /**
  * 类实例创建者创建者
@@ -164,4 +162,32 @@ public class ClassUtil {
         doGetFields(cl.getSuperclass(), fields);
     }
 
+    public static List<Method> getAllMethods(Class<?> cl) {
+        List<Method> methods = new ArrayList<>();
+        doGetMethods(cl, methods, null);
+        return methods;
+    }
+
+    public static List<Method> getAllMethods(Class<?> cl, Predicate<Method> tester) {
+        List<Method> methods = new ArrayList<>();
+        doGetMethods(cl, methods, tester);
+        return methods;
+    }
+
+
+    private static void doGetMethods(Class<?> cl, List<Method> methods, Predicate<Method> tester) {
+        if (cl == null || cl == Object.class) {
+            return;
+        }
+
+        Method[] declaredMethods = cl.getDeclaredMethods();
+        for (Method method : declaredMethods) {
+            if (tester == null || tester.test(method)) {
+                methods.add(method);
+            }
+        }
+
+        doGetMethods(cl.getSuperclass(), methods, tester);
+    }
+
 }