AJ-428: fix regression testing issues.

Author: chengyitian

src/com/xxdb/data/BasicDecimal128Vector.java

@@ -275,7 +275,7 @@ public Entity get(int index) {
 
     @Override
     public void set(int index, Entity value) throws Exception {
-        if (!value.isScalar() || value.getDataType() != DT_DECIMAL128) {
+        if (!value.getDataForm().equals(DATA_FORM.DF_SCALAR) || value.getDataType() != DT_DECIMAL128) {
             throw new RuntimeException("The value type is not BasicDecimal128!");
         }
 

src/com/xxdb/data/BasicDecimal32Vector.java

@@ -182,7 +182,7 @@ public Entity get(int index) {
 
     @Override
     public void set(int index, Entity value) throws Exception {
-        if (!value.isScalar() && value.getDataType() != DT_DECIMAL32) {
+        if (!value.getDataForm().equals(DATA_FORM.DF_SCALAR) || value.getDataType() != DT_DECIMAL32) {
             throw new RuntimeException("value type is not BasicDecimal32!");
         }
 

src/com/xxdb/data/BasicDecimal64Vector.java

@@ -189,7 +189,7 @@ public Entity get(int index) {
 
     @Override
     public void set(int index, Entity value) throws Exception {
-        if (!value.isScalar() && value.getDataType() != DT_DECIMAL64) {
+        if (!value.getDataForm().equals(DATA_FORM.DF_SCALAR) || value.getDataType() != DT_DECIMAL64) {
             throw new RuntimeException("value type is not BasicDecimal64!");
         }