GemFire 7.0

com.gemstone.gemfire.pdx
Enum FieldType

java.lang.Object
  extended by java.lang.Enum<FieldType>
      extended by com.gemstone.gemfire.pdx.FieldType
All Implemented Interfaces:
Serializable, Comparable<FieldType>

public enum FieldType
extends Enum<FieldType>

Every field of a pdx must have one of these types. The type of that field can never change. If you do want to be able to change a field's class then its field type needs to be OBJECT. Some field types are always serialized with a certain number of bytes; these are called "fixed-width". Others are serialized with a variable number of bytes; these are called "variable-width".

Since:
6.6.2

Enum Constant Summary
ARRAY_OF_BYTE_ARRAYS
           
BOOLEAN
           
BOOLEAN_ARRAY
           
BYTE
           
BYTE_ARRAY
           
CHAR
           
CHAR_ARRAY
           
DATE
           
DOUBLE
           
DOUBLE_ARRAY
           
FLOAT
           
FLOAT_ARRAY
           
INT
           
INT_ARRAY
           
LONG
           
LONG_ARRAY
           
OBJECT
           
OBJECT_ARRAY
           
SHORT
           
SHORT_ARRAY
           
STRING
           
STRING_ARRAY
           
 
Method Summary
static FieldType get(Class<?> c)
          Given a Class return the corresponding FieldType.
 ByteBuffer getDefaultBytes()
          Returns a ByteBuffer that contains the serialized encoding of this type's default value.
 Object getDefaultValue()
           
 int getWidth()
          Returns the number of bytes used to serialize fixed-width fields; -1 is returned for variable-width fields.
 boolean isFixedWidth()
          Returns true if the type is "fixed-width"; false if it is "variable-width".
 String toString()
           
static FieldType valueOf(String name)
          Returns the enum constant of this type with the specified name.
static FieldType[] values()
          Returns an array containing the constants of this enum type, in the order they are declared.
 
Methods inherited from class java.lang.Enum
compareTo, equals, getDeclaringClass, hashCode, name, ordinal, valueOf
 
Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait
 

Enum Constant Detail

BOOLEAN

public static final FieldType BOOLEAN

BYTE

public static final FieldType BYTE

CHAR

public static final FieldType CHAR

SHORT

public static final FieldType SHORT

INT

public static final FieldType INT

LONG

public static final FieldType LONG

FLOAT

public static final FieldType FLOAT

DOUBLE

public static final FieldType DOUBLE

DATE

public static final FieldType DATE

STRING

public static final FieldType STRING

OBJECT

public static final FieldType OBJECT

BOOLEAN_ARRAY

public static final FieldType BOOLEAN_ARRAY

CHAR_ARRAY

public static final FieldType CHAR_ARRAY

BYTE_ARRAY

public static final FieldType BYTE_ARRAY

SHORT_ARRAY

public static final FieldType SHORT_ARRAY

INT_ARRAY

public static final FieldType INT_ARRAY

LONG_ARRAY

public static final FieldType LONG_ARRAY

FLOAT_ARRAY

public static final FieldType FLOAT_ARRAY

DOUBLE_ARRAY

public static final FieldType DOUBLE_ARRAY

STRING_ARRAY

public static final FieldType STRING_ARRAY

OBJECT_ARRAY

public static final FieldType OBJECT_ARRAY

ARRAY_OF_BYTE_ARRAYS

public static final FieldType ARRAY_OF_BYTE_ARRAYS
Method Detail

values

public static FieldType[] values()
Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
for (FieldType c : FieldType.values())
    System.out.println(c);

Returns:
an array containing the constants of this enum type, in the order they are declared

valueOf

public static FieldType valueOf(String name)
Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:
name - the name of the enum constant to be returned.
Returns:
the enum constant with the specified name
Throws:
IllegalArgumentException - if this enum type has no constant with the specified name
NullPointerException - if the argument is null

isFixedWidth

public boolean isFixedWidth()
Returns true if the type is "fixed-width"; false if it is "variable-width".


getWidth

public int getWidth()
Returns the number of bytes used to serialize fixed-width fields; -1 is returned for variable-width fields.


toString

public String toString()
Overrides:
toString in class Enum<FieldType>

getDefaultBytes

public ByteBuffer getDefaultBytes()
Returns a ByteBuffer that contains the serialized encoding of this type's default value.


get

public static FieldType get(Class<?> c)
Given a Class return the corresponding FieldType.


getDefaultValue

public Object getDefaultValue()

GemFire 7.0

Copyright © 1997-2012 VMware, Inc. All rights reserved.