refactor SQLExpr

sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parser/context/ConditionContext.java

@@ -18,10 +18,10 @@
 package com.dangdang.ddframe.rdb.sharding.parser.context;
 
 import com.dangdang.ddframe.rdb.sharding.parser.contstant.ShardingOperator;
-import com.dangdang.ddframe.rdb.sharding.parser.expr.AbstractSQLTextLiteralExpr;
 import com.dangdang.ddframe.rdb.sharding.parser.expr.SQLExpr;
 import com.dangdang.ddframe.rdb.sharding.parser.expr.SQLNumberExpr;
 import com.dangdang.ddframe.rdb.sharding.parser.expr.SQLPlaceholderExpr;
+import com.dangdang.ddframe.rdb.sharding.parser.expr.SQLTextExpr;
 import com.google.common.base.Optional;
 import lombok.EqualsAndHashCode;
 import lombok.Getter;
@@ -126,8 +126,8 @@ public final class ConditionContext {
             if (sqlExpr instanceof SQLPlaceholderExpr) {
                 values.add((Comparable) ((SQLPlaceholderExpr) sqlExpr).getValue());
                 valueIndices.add(((SQLPlaceholderExpr) sqlExpr).getIndex());
-            } else if (sqlExpr instanceof AbstractSQLTextLiteralExpr) {
-                values.add(((AbstractSQLTextLiteralExpr) sqlExpr).getText());
+            } else if (sqlExpr instanceof SQLTextExpr) {
+                values.add(((SQLTextExpr) sqlExpr).getText());
             } else if (sqlExpr instanceof SQLNumberExpr) {
                 values.add((Comparable) ((SQLNumberExpr) sqlExpr).getNumber());
             }

sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parser/dialect/mysql/parser/MySQLInsertParser.java

@@ -21,7 +21,7 @@ import com.dangdang.ddframe.rdb.sharding.api.rule.ShardingRule;
 import com.dangdang.ddframe.rdb.sharding.parser.context.ConditionContext;
 import com.dangdang.ddframe.rdb.sharding.parser.context.ShardingColumnContext;
 import com.dangdang.ddframe.rdb.sharding.parser.dialect.mysql.lexer.MySQLKeyword;
-import com.dangdang.ddframe.rdb.sharding.parser.expr.SQLCharExpr;
+import com.dangdang.ddframe.rdb.sharding.parser.expr.SQLTextExpr;
 import com.dangdang.ddframe.rdb.sharding.parser.expr.SQLExpr;
 import com.dangdang.ddframe.rdb.sharding.parser.expr.SQLIgnoreExpr;
 import com.dangdang.ddframe.rdb.sharding.parser.expr.SQLNumberExpr;
@@ -69,7 +69,7 @@ public final class MySQLInsertParser extends AbstractInsertParser {
             } else if (getExprParser().equalAny(Literals.FLOAT)) {
                 sqlExpr = new SQLNumberExpr(Double.parseDouble(getExprParser().getLexer().getCurrentToken().getLiterals()));
             } else if (getExprParser().equalAny(Literals.CHARS)) {
-                sqlExpr = new SQLCharExpr(getExprParser().getLexer().getCurrentToken().getLiterals());
+                sqlExpr = new SQLTextExpr(getExprParser().getLexer().getCurrentToken().getLiterals());
             } else if (getExprParser().equalAny(DefaultKeyword.NULL)) {
                 sqlExpr = new SQLIgnoreExpr();
             } else if (getExprParser().equalAny(Symbol.QUESTION)) {

sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parser/expr/SQLCharExpr.java

-/*
- * Copyright 1999-2015 dangdang.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
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * 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.
- * </p>
- */
-
-package com.dangdang.ddframe.rdb.sharding.parser.expr;
-
-public class SQLCharExpr extends AbstractSQLTextLiteralExpr {
-    
-    public SQLCharExpr(final String text) {
-        super(text);
-    }
-}

sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parser/expr/SQLExpr.java

@@ -17,5 +17,10 @@
 
 package com.dangdang.ddframe.rdb.sharding.parser.expr;
 
+/**
+ * SQL表达式接口.
+ * 
+ * @author zhangliang 
+ */
 public interface SQLExpr {
 }

sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parser/expr/SQLIdentifierExpr.java

@@ -20,9 +20,14 @@ package com.dangdang.ddframe.rdb.sharding.parser.expr;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
 
+/**
+ * 标识表达式.
+ *
+ * @author zhangliang
+ */
 @RequiredArgsConstructor
 @Getter
-public class SQLIdentifierExpr implements SQLExpr {
+public final class SQLIdentifierExpr implements SQLExpr {
     
     private final String name;
 }

sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parser/expr/SQLLiteralExpr.java

@@ -17,5 +17,10 @@
 
 package com.dangdang.ddframe.rdb.sharding.parser.expr;
 
+/**
+ * 字面量表达式.
+ *
+ * @author zhangliang
+ */
 public interface SQLLiteralExpr extends SQLExpr {
 }

sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parser/expr/SQLNumberExpr.java

@@ -20,9 +20,14 @@ package com.dangdang.ddframe.rdb.sharding.parser.expr;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
 
+/**
+ * 数字表达式.
+ *
+ * @author zhangliang
+ */
 @RequiredArgsConstructor
 @Getter
-public class SQLNumberExpr implements SQLLiteralExpr {
+public final class SQLNumberExpr implements SQLLiteralExpr {
     
     private final Number number;
 }

sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parser/expr/SQLPlaceholderExpr.java

@@ -20,9 +20,14 @@ package com.dangdang.ddframe.rdb.sharding.parser.expr;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
 
+/**
+ * 占位符表达式.
+ *
+ * @author zhangliang
+ */
 @RequiredArgsConstructor
 @Getter
-public class SQLPlaceholderExpr implements SQLExpr {
+public final class SQLPlaceholderExpr implements SQLExpr {
     
     private final int index;
     

sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parser/expr/SQLPropertyExpr.java

@@ -20,9 +20,14 @@ package com.dangdang.ddframe.rdb.sharding.parser.expr;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
 
+/**
+ * 属性表达式.
+ *
+ * @author zhangliang
+ */
 @RequiredArgsConstructor
 @Getter
-public class SQLPropertyExpr implements SQLExpr {
+public final class SQLPropertyExpr implements SQLExpr {
     
     private final SQLIdentifierExpr owner;
     

sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parser/expr/AbstractSQLTextLiteralExpr.java → sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parser/expr/SQLTextExpr.java

@@ -20,9 +20,14 @@ package com.dangdang.ddframe.rdb.sharding.parser.expr;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
 
+/**
+ * 文本表达式.
+ *
+ * @author zhangliang
+ */
 @RequiredArgsConstructor
 @Getter
-public abstract class AbstractSQLTextLiteralExpr implements SQLLiteralExpr {
+public final class SQLTextExpr implements SQLLiteralExpr {
     
     private final String text;
 }

sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parser/parser/SQLParser.java

@@ -28,7 +28,7 @@ import com.dangdang.ddframe.rdb.sharding.parser.context.ShardingColumnContext;
 import com.dangdang.ddframe.rdb.sharding.parser.context.TableContext;
 import com.dangdang.ddframe.rdb.sharding.parser.context.TableToken;
 import com.dangdang.ddframe.rdb.sharding.parser.contstant.AggregationType;
-import com.dangdang.ddframe.rdb.sharding.parser.expr.SQLCharExpr;
+import com.dangdang.ddframe.rdb.sharding.parser.expr.SQLTextExpr;
 import com.dangdang.ddframe.rdb.sharding.parser.expr.SQLExpr;
 import com.dangdang.ddframe.rdb.sharding.parser.expr.SQLIdentifierExpr;
 import com.dangdang.ddframe.rdb.sharding.parser.expr.SQLIgnoreExpr;
@@ -119,7 +119,7 @@ public class SQLParser extends AbstractParser {
             return new SQLPlaceholderExpr(parametersIndex - 1, parameters.get(parametersIndex - 1));
         }
         if (equalAny(Literals.CHARS)) {
-            return new SQLCharExpr(literals);
+            return new SQLTextExpr(literals);
         }
         // TODO 考虑long的情况
         if (equalAny(Literals.INT)) {