```
public interface DataSource
```
The DataSource contains all the indexes and metadata for a column for query execution purpose.

Method Summary

Modifier and Type	Method	Description
`BloomFilterReader`	`getBloomFilter()`	Returns the bloom filter for the column if exists, or `null` if not.
`DataSourceMetadata`	`getDataSourceMetadata()`	Returns the metadata for the column.
`Dictionary`	`getDictionary()`	Returns the dictionary for the column if it is dictionary-encoded, or `null` if not.
`ForwardIndexReader<?>`	`getForwardIndex()`	Returns the forward index for the column.
`TextIndexReader`	`getFSTIndex()`	Returns the FST index for the column if exists, or `null` if not.
`H3IndexReader`	`getH3Index()`	Returns the H3 index for the geospatial column if exists, or `null` if not.
`InvertedIndexReader<?>`	`getInvertedIndex()`	Returns the inverted index for the column if exists, or `null` if not.
`JsonIndexReader`	`getJsonIndex()`	Returns the json index for the column if exists, or `null` if not.
`NullValueVectorReader`	`getNullValueVector()`	Returns null value vector for the column if exists, or `null` if not.
`RangeIndexReader<?>`	`getRangeIndex()`	Returns the range index for the column if exists, or `null` if not.
`TextIndexReader`	`getTextIndex()`	Returns the text index for the column if exists, or `null` if not.

- Method Detail
  - getDataSourceMetadata
```
DataSourceMetadata getDataSourceMetadata()
```
    Returns the metadata for the column.
  - getForwardIndex
```
ForwardIndexReader<?> getForwardIndex()
```
    Returns the forward index for the column. The forward index can be either dictionary-encoded or raw.
  - getDictionary
```
@Nullable
Dictionary getDictionary()
```
    Returns the dictionary for the column if it is dictionary-encoded, or null if not.
  - getInvertedIndex
```
@Nullable
InvertedIndexReader<?> getInvertedIndex()
```
    Returns the inverted index for the column if exists, or null if not.
  - getRangeIndex
```
@Nullable
RangeIndexReader<?> getRangeIndex()
```
    Returns the range index for the column if exists, or null if not.
    TODO: Have a separate interface for range index.
  - getTextIndex
```
@Nullable
TextIndexReader getTextIndex()
```
    Returns the text index for the column if exists, or null if not.
  - getFSTIndex
```
@Nullable
TextIndexReader getFSTIndex()
```
    Returns the FST index for the column if exists, or null if not.
  - getJsonIndex
```
@Nullable
JsonIndexReader getJsonIndex()
```
    Returns the json index for the column if exists, or null if not.
  - getH3Index
```
@Nullable
H3IndexReader getH3Index()
```
    Returns the H3 index for the geospatial column if exists, or null if not.
  - getBloomFilter
```
@Nullable
BloomFilterReader getBloomFilter()
```
    Returns the bloom filter for the column if exists, or null if not.
  - getNullValueVector
```
@Nullable
NullValueVectorReader getNullValueVector()
```
    Returns null value vector for the column if exists, or null if not.

Interface DataSource

Method Summary

Method Detail

getDataSourceMetadata

getForwardIndex

getDictionary

getInvertedIndex

getRangeIndex

getTextIndex

getFSTIndex

getJsonIndex

getH3Index

getBloomFilter

getNullValueVector