| Interface | Description | 
|---|---|
| HadoopShims | |
| HadoopShims.ByteBufferPoolShim | a hadoop.io ByteBufferPool shim. | 
| HadoopShims.DirectDecompressor | |
| HadoopShims.ZeroCopyReaderShim | |
| KeyProvider | A source of crypto keys. | 
| KeyProvider.Factory | A service loader factory interface. | 
| Class | Description | 
|---|---|
| HadoopShims.KeyMetadata | Information about a crypto key including the key name, version, and the
 algorithm. | 
| HadoopShimsCurrent | Shims for recent versions of Hadoop | 
| HadoopShimsPre2_3 | Shims for versions of Hadoop up to and including 2.2.x | 
| HadoopShimsPre2_6 | Shims for versions of Hadoop less than 2.6 | 
| HadoopShimsPre2_7 | Shims for versions of Hadoop less than 2.7. | 
| LocalKey | Local keys are random keys that are generated for each file and column. | 
| Enum | Description | 
|---|---|
| HadoopShims.DirectCompressionType | |
| HadoopShims.KeyProviderKind | The known KeyProviders for column encryption. | 
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