Package org.apache.cassandra.cql3

Class ColumnIdentifier

java.lang.Object

org.apache.cassandra.cql3.ColumnIdentifier

All Implemented Interfaces:

Comparable<ColumnIdentifier>, IMeasurableMemory

public class ColumnIdentifier
extends Object
implements IMeasurableMemory, Comparable<ColumnIdentifier>

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

Field Summary

Fields

Modifier and Type	Field	Description
final ByteBuffer	bytes
final long	prefixComparison	since these objects are compared frequently, we stash an efficiently compared prefix of the bytes, in the expectation that the majority of comparisons can be answered by this value only

Constructor Summary

Constructors

Constructor	Description
ColumnIdentifier(String rawText, boolean keepCase)
ColumnIdentifier(ByteBuffer bytes, String text)
ColumnIdentifier(ByteBuffer bytes, AbstractType<?> type)

Method Summary

Modifier and Type	Method	Description
ColumnIdentifier	clone(ByteBufferCloner cloner)
int	compareTo(ColumnIdentifier that)
final boolean	equals(Object o)
static ColumnIdentifier	getInterned(String rawText, boolean keepCase)
static ColumnIdentifier	getInterned(ByteBuffer bytes, AbstractType<?> type)
static ColumnIdentifier	getInterned(AbstractType<?> type, ByteBuffer bytes, String text)
final int	hashCode()
boolean	isInterned()
static String	maybeQuote(String text)
String	toCQLString()	Returns a string representation of the identifier that is safe to use directly in CQL queries.
String	toString()
long	unsharedHeapSize()
long	unsharedHeapSizeExcludingData()

Methods inherited from class java.lang.Object

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

Field Details

bytes

public final ByteBuffer bytes

prefixComparison

public final long prefixComparison

since these objects are compared frequently, we stash an efficiently compared prefix of the bytes, in the expectation that the majority of comparisons can be answered by this value only

Constructor Details

ColumnIdentifier

public ColumnIdentifier(String rawText,
 boolean keepCase)

ColumnIdentifier

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

ColumnIdentifier

public ColumnIdentifier(ByteBuffer bytes,
 String text)

Method Details

getInterned

public static ColumnIdentifier getInterned(ByteBuffer bytes,
 AbstractType<?> type)

getInterned

public static ColumnIdentifier getInterned(String rawText,
 boolean keepCase)

getInterned

public static ColumnIdentifier getInterned(AbstractType<?> type,
 ByteBuffer bytes,
 String text)

isInterned

public boolean isInterned()

hashCode

public final int hashCode()

Overrides:

hashCode in class Object

equals

public final boolean equals(Object o)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

toCQLString

public String toCQLString()

Returns a string representation of the identifier that is safe to use directly in CQL queries. If necessary, the string will be double-quoted, and any quotes inside the string will be escaped.

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(ByteBufferCloner cloner)

compareTo

public int compareTo(ColumnIdentifier that)

Specified by:

compareTo in interface Comparable<ColumnIdentifier>

maybeQuote

public static String maybeQuote(String text)