add doc

docs/csdk-guide.md

@@ -241,6 +241,36 @@ release the memory and destroy JVM.
     jobject readSchema(char *path, bool validateSchema);
 ```
 
+```
+    /**
+     * read schema from path,
+     * path can be folder path, carbonindex file path, and carbondata file path
+     * and will not check all files schema
+     *
+     * @param path file/folder path
+     * @param conf           configuration support, can set s3a AK,SK,
+     *                       end point and other conf with this
+     * @return schema
+     */
+    jobject readSchema(char *path, Configuration conf);
+```
+
+```
+    /**
+     *  read schema from path,
+     *  path can be folder path, carbonindex file path, and carbondata file path
+     *  and user can decide whether check all files schema
+     *
+     * @param path carbon data path
+     * @param validateSchema whether check all files schema
+     * @param conf           configuration support, can set s3a AK,SK,
+     *                       end point and other conf with this
+     * @return schema
+     */
+    jobject readSchema(char *path, bool validateSchema, Configuration conf);
+
+```
+
 ###Schema
 ``` 
  /**

docs/sdk-guide.md

@@ -633,7 +633,7 @@ Find example code at [CarbonReaderExample](https://github.com/apache/carbondata/
   * @return list of CarbonReader objects
   */
   public List<CarbonReader> split(int maxSplits);
-``
+```
 
 ```
   /**
@@ -722,48 +722,59 @@ Find example code at [CarbonReaderExample](https://github.com/apache/carbondata/
 
 ```
   /**
-   * Read carbondata file and return the schema
+   * read schema from path,
+   * path can be folder path,carbonindex file path, and carbondata file path
+   * and will not check all files schema
    *
-   * @param dataFilePath complete path including carbondata file name
-   * @return Schema object
+   * @param path file/folder path
+   * @return schema
+   * @throws IOException
    */
-  public static Schema readSchemaInDataFile(String dataFilePath);
+  public static Schema readSchema(String path);
 ```
 
 ```
   /**
-   * Read carbonindex file and return the schema
+   * read schema from path,
+   * path can be folder path, carbonindex file path, and carbondata file path
+   * and will not check all files schema
    *
-   * @param indexFilePath complete path including index file name
-   * @return schema object
+   * @param path file/folder path
+   * @param conf hadoop configuration support, can set s3a AK,SK,end point and other conf with this
+   * @return schema
    * @throws IOException
    */
-  public static Schema readSchemaInIndexFile(String indexFilePath);
+  public static Schema readSchema(String path, Configuration conf);
 ```
+
 ```
   /**
    * read schema from path,
    * path can be folder path,carbonindex file path, and carbondata file path
-   * and will not check all files schema
+   * and user can decide whether check all files schema
    *
-   * @param path file/folder path
+   * @param path             file/folder path
+   * @param validateSchema whether check all files schema
    * @return schema
    * @throws IOException
    */
-  public static Schema readSchema(String path);
+  public static Schema readSchema(String path, boolean validateSchema);
 ```
+
 ```
   /**
    * read schema from path,
-   * path can be folder path,carbonindex file path, and carbondata file path
+   * path can be folder path, carbonindex file path, and carbondata file path
    * and user can decide whether check all files schema
    *
-   * @param path             file/folder path
+   * @param path           file/folder path
    * @param validateSchema whether check all files schema
+   * @param conf           hadoop configuration support, can set s3a AK,SK,
+   *                       end point and other conf with this
    * @return schema
    * @throws IOException
    */
-  public static Schema readSchema(String path, boolean validateSchema);
+  public static Schema readSchema(String path, boolean validateSchema, Configuration conf);
 ```
 
 ```

store/sdk/src/main/java/org/apache/carbondata/sdk/file/CarbonSchemaReader.java

@@ -49,8 +49,6 @@
  */
 public class CarbonSchemaReader {
 
-  private Configuration hadoopConf;
-
   /**
    * Read schema file and return the schema
    *