AJ-872: support 'INSTRUMENT'、'MKTDATA';

Author: chengyitian

src/com/xxdb/data/AbstractExtendObj.java

@@ -0,0 +1,32 @@
+package com.xxdb.data;
+
+import com.xxdb.io.ExtendedDataOutput;
+import java.io.IOException;
+
+public abstract class AbstractExtendObj extends AbstractEntity implements ExtendObj {
+
+    @Override
+    public DATA_FORM getDataForm() {
+        return DATA_FORM.DF_EXTOBJ;
+    }
+
+    @Override
+    public int rows() {
+        return 1;
+    }
+
+    @Override
+    public int columns() {
+        return 1;
+    }
+
+    @Override
+    public void write(ExtendedDataOutput output) throws IOException {
+        throw new UnsupportedOperationException("Not support yet");
+    }
+
+    @Override
+    public String toString(){
+        return getString();
+    }
+}