org.apache.cassandra.cql3

## Class ColumnIdentifier

- java.lang.Object
- - org.apache.cassandra.cql3.selection.Selectable
  - - org.apache.cassandra.cql3.ColumnIdentifier

- All Implemented Interfaces:
    IMeasurableMemory

      public class ColumnIdentifier
      extends Selectable
      implements IMeasurableMemory

  Represents an identifer for a CQL column definition. TODO : should support light-weight mode without text representation for when not interned

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `static class` | `ColumnIdentifier.Raw` Because Thrift-created tables may have a non-text comparator, we cannot determine the proper 'key' until we know the comparator.

    - ### Nested classes/interfaces inherited from class org.apache.cassandra.cql3.selection.Selectable

      `Selectable.WithFieldSelection, Selectable.WithFunction, Selectable.WritetimeOrTTL`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `java.nio.ByteBuffer` | `bytes`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `ColumnIdentifier(java.nio.ByteBuffer bytes, AbstractType<?> type)`
    `ColumnIdentifier(java.nio.ByteBuffer bytes, java.lang.String text)`
    `ColumnIdentifier(java.lang.String rawText, boolean keepCase)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `ColumnIdentifier` | `clone(AbstractAllocator allocator)`
    `boolean` | `equals(java.lang.Object o)`
    `int` | `hashCode()`
    `Selector.Factory` | `newSelectorFactory(CFMetaData cfm, java.util.List<ColumnDefinition> defs)`
    `java.lang.String` | `toString()`
    `long` | `unsharedHeapSize()`
    `long` | `unsharedHeapSizeExcludingData()`

    - ### Methods inherited from class org.apache.cassandra.cql3.selection.Selectable

      `addAndGetIndex`

    - ### Methods inherited from class java.lang.Object

      `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

- - ### Field Detail

    - #### bytes

          public final java.nio.ByteBuffer bytes

  - ### Constructor Detail

    - #### ColumnIdentifier

          public ColumnIdentifier(java.lang.String rawText,
                                  boolean keepCase)

    - #### ColumnIdentifier

          public ColumnIdentifier(java.nio.ByteBuffer bytes,
                                  AbstractType<?> type)

    - #### ColumnIdentifier

          public ColumnIdentifier(java.nio.ByteBuffer bytes,
                                  java.lang.String text)

  - ### Method Detail

    - #### hashCode

          public final int hashCode()

      Overrides:
        `hashCode` in class `java.lang.Object`

    - #### equals

          public final boolean equals(java.lang.Object o)

      Overrides:
        `equals` in class `java.lang.Object`

    - #### toString

          public java.lang.String toString()

      Overrides:
        `toString` in class `java.lang.Object`

    - #### unsharedHeapSize

          public long unsharedHeapSize()

      Specified by:
        `unsharedHeapSize` in interface `IMeasurableMemory`
      Returns:
        the amount of on-heap memory retained by the object that might be reclaimed if the object were reclaimed, i.e. it should try to exclude globally cached data where possible, or counting portions of arrays that are referenced by the object but used by other objects only (e.g. slabbed byte-buffers), etc.

    - #### unsharedHeapSizeExcludingData

          public long unsharedHeapSizeExcludingData()

    - #### clone

          public ColumnIdentifier clone(AbstractAllocator allocator)

    - #### newSelectorFactory

          public Selector.Factory newSelectorFactory(CFMetaData cfm,
                                                     java.util.List<ColumnDefinition> defs)
                                              throws InvalidRequestException

      Specified by:
        `newSelectorFactory` in class `Selectable`
      Throws:
        `InvalidRequestException`

Copyright © 2018 The Apache Software Foundation