refactor

src/main/java/com/alibaba/druid/mapping/Entity.java

@@ -0,0 +1,46 @@
+package com.alibaba.druid.mapping;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Entity {
+
+    private String         name;
+    private String         description;
+    private String         tableName;
+
+    private List<Property> properties = new ArrayList<Property>();
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public String getTableName() {
+        return tableName;
+    }
+
+    public void setTableName(String tableName) {
+        this.tableName = tableName;
+    }
+
+    public List<Property> getProperties() {
+        return properties;
+    }
+
+    public void setProperties(List<Property> properties) {
+        this.properties = properties;
+    }
+
+}

src/main/java/com/alibaba/druid/mapping/EntityMapingMySqlVisitor.java

@@ -0,0 +1,18 @@
+package com.alibaba.druid.mapping;
+
+import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlASTVisitorAdapter;
+
+public class EntityMapingMySqlVisitor extends MySqlASTVisitorAdapter {
+
+    private final Entity entity;
+
+    public EntityMapingMySqlVisitor(Entity entity){
+        super();
+        this.entity = entity;
+    }
+
+    public Entity getEntity() {
+        return entity;
+    }
+
+}

src/main/java/com/alibaba/druid/mapping/Property.java

@@ -0,0 +1,24 @@
+package com.alibaba.druid.mapping;
+
+public class Property {
+
+    private String name;
+    private String dbColumnName;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getDbColumnName() {
+        return dbColumnName;
+    }
+
+    public void setDbColumnName(String dbColumnName) {
+        this.dbColumnName = dbColumnName;
+    }
+
+}

src/main/java/com/alibaba/druid/sql/ast/expr/SQLAggregateExpr.java

@@ -26,27 +26,26 @@ import com.alibaba.druid.sql.visitor.SQLASTVisitor;
 public class SQLAggregateExpr extends SQLExprImpl implements Serializable {
 
     private static final long     serialVersionUID = 1L;
-    protected SQLIdentifierExpr   methodName;
+    protected String              methodName;
     protected int                 option;
     protected final List<SQLExpr> arguments        = new ArrayList<SQLExpr>();
 
     public SQLAggregateExpr(String methodName){
 
-        this.methodName = new SQLIdentifierExpr(methodName);
+        this.methodName = methodName;
         this.option = 1;
     }
 
     public SQLAggregateExpr(String methodName, int option){
-
-        this.methodName = new SQLIdentifierExpr(methodName);
+        this.methodName = methodName;
         this.option = option;
     }
 
-    public SQLIdentifierExpr getMethodName() {
+    public String getMethodName() {
         return this.methodName;
     }
 
-    public void setMethodName(SQLIdentifierExpr methodName) {
+    public void setMethodName(String methodName) {
         this.methodName = methodName;
     }
 
@@ -75,7 +74,6 @@ public class SQLAggregateExpr extends SQLExprImpl implements Serializable {
     @Override
     protected void accept0(SQLASTVisitor visitor) {
         if (visitor.visit(this)) {
-            acceptChild(visitor, this.methodName);
             acceptChild(visitor, this.arguments);
         }
 

src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlMappingVisitor.java

@@ -0,0 +1,16 @@
+package com.alibaba.druid.sql.dialect.mysql.visitor;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import com.alibaba.druid.sql.ast.SQLExpr;
+
+public class MySqlMappingVisitor extends MySqlASTVisitorAdapter {
+
+    private final Map<String, SQLExpr> mapping = new HashMap<String, SQLExpr>();
+    
+    public void addMapping(String column, String targetExpr) {
+        
+    }
+    
+}

src/main/java/com/alibaba/druid/sql/dialect/oracle/ast/expr/OracleAggregateExpr.java

@@ -19,7 +19,6 @@ import java.io.Serializable;
 
 import com.alibaba.druid.sql.ast.SQLExpr;
 import com.alibaba.druid.sql.ast.expr.SQLAggregateExpr;
-import com.alibaba.druid.sql.ast.expr.SQLIdentifierExpr;
 import com.alibaba.druid.sql.dialect.oracle.visitor.OracleASTVisitor;
 import com.alibaba.druid.sql.visitor.SQLASTVisitor;
 
@@ -54,10 +53,6 @@ public class OracleAggregateExpr extends SQLAggregateExpr implements Serializabl
         super(methodName, option);
     }
 
-    public SQLIdentifierExpr getMethodName() {
-        return this.methodName;
-    }
-
     public OracleAnalytic getOver() {
         return this.over;
     }
@@ -87,7 +82,6 @@ public class OracleAggregateExpr extends SQLAggregateExpr implements Serializabl
             this.accept0((OracleASTVisitor) visitor);
         } else {
             if (visitor.visit(this)) {
-                acceptChild(visitor, this.methodName);
                 acceptChild(visitor, this.arguments);
                 acceptChild(visitor, this.over);
             }
@@ -97,7 +91,6 @@ public class OracleAggregateExpr extends SQLAggregateExpr implements Serializabl
 
     public void accept0(OracleASTVisitor visitor) {
         if (visitor.visit(this)) {
-            acceptChild(visitor, this.methodName);
             acceptChild(visitor, this.arguments);
             acceptChild(visitor, this.over);
         }

src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleOutputVisitor.java

@@ -195,7 +195,7 @@ public class OracleOutputVisitor extends SQLASTOutputVisitor implements OracleAS
     }
 
     public boolean visit(OracleAggregateExpr expr) {
-        expr.getMethodName().accept(this);
+        print(expr.getMethodName());
         print("(");
         if (expr.isUnique()) {
             print("UNIQUE ");

src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java

@@ -387,7 +387,7 @@ public class SQLASTOutputVisitor extends SQLASTVisitorAdapter {
     }
 
     public boolean visit(SQLAggregateExpr x) {
-        x.getMethodName().accept(this);
+        print(x.getMethodName());
         print("(");
         printAndAccept(x.getArguments(), ", ");
         print(")");