CacheDataDescription (Hibernate JavaDocs)
Date: 2012-04-05

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## org.hibernate.cache.spi
Interface CacheDataDescription

All Known Implementing Classes:
  CacheDataDescriptionImpl

    public interface CacheDataDescription

Describes attributes regarding the type of data to be cached.

Method Summary
`Comparator` | `getVersionComparator()` Get the comparator used to compare two different version values.
`boolean` | `isMutable()` Is the data marked as being mutable?
`boolean` | `isVersioned()` Is the data to be cached considered versioned? If `true`, it is illegal for `getVersionComparator()` to return `null`.

Method Detail

### isMutable

    boolean isMutable()

  Is the data marked as being mutable?

  Returns:
    `true` if the data is mutable; `false` otherwise.

### isVersioned

    boolean isVersioned()

  Is the data to be cached considered versioned? If `true`, it is illegal for `getVersionComparator()` to return `null`.

  Returns:
    `true` if the data is versioned; `false` otherwise.

### getVersionComparator

    Comparator getVersionComparator()

  Get the comparator used to compare two different version values. May return `null` if `isVersioned()` returns false.

  Returns:
    The comparator for versions, or `null`

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