refactor for increaseParametersIndex

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

@@ -44,7 +44,12 @@ public abstract class AbstractParser {
     @Setter
     private int parametersIndex;
     
-    protected int increaseParametersIndex() {
+    /**
+     * 增加索引偏移量.
+     * 
+     * @return 增加后的索引偏移量
+     */
+    public int increaseParametersIndex() {
         return ++parametersIndex;
     }
     
@@ -53,7 +58,6 @@ public abstract class AbstractParser {
      *
      * @return 小括号内所有的词法标记
      */
-    // TODO 判断? 增加param index
     public final String skipParentheses() {
         StringBuilder result = new StringBuilder("");
         int count = 0;

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

@@ -72,7 +72,7 @@ public final class MySQLInsertParser extends AbstractInsertParser {
                 sqlExpression = new SQLIgnoreExpression();
             } else if (getSqlParser().equalAny(Symbol.QUESTION)) {
                 sqlExpression = new SQLPlaceholderExpression(getSqlParser().getParametersIndex());
-                getSqlParser().setParametersIndex(getSqlParser().getParametersIndex() + 1);
+                getSqlParser().increaseParametersIndex();
             } else {
                 throw new UnsupportedOperationException("");
             }

sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parsing/parser/dialect/sqlserver/SQLServerParser.java

@@ -103,7 +103,7 @@ public final class SQLServerParser extends SQLParser {
             offsetValue = Integer.parseInt(getLexer().getCurrentToken().getLiterals());
         } else if (equalAny(Symbol.QUESTION)) {
             offsetIndex = getParametersIndex();
-            setParametersIndex(offsetIndex + 1);
+            increaseParametersIndex();
         } else {
             throw new SQLParsingException(getLexer());
         }
@@ -118,7 +118,7 @@ public final class SQLServerParser extends SQLParser {
                 rowCountValue = Integer.parseInt(getLexer().getCurrentToken().getLiterals());
             } else if (equalAny(Symbol.QUESTION)) {
                 rowCountIndex = getParametersIndex();
-                setParametersIndex(rowCountIndex + 1);
+                increaseParametersIndex();
             } else {
                 throw new SQLParsingException(getLexer());
             }