io.permazen.core.type

Class DoubleType

java.lang.Object

io.permazen.core.FieldType<T>

io.permazen.core.type.NonNullFieldType<T>

io.permazen.core.type.PrimitiveType<T>

io.permazen.core.type.NumberType<Double>

io.permazen.core.type.DoubleType

All Implemented Interfaces:

Serializable, Comparator<Double>

public class DoubleType
extends NumberType<Double>

Double type.

See Also:

Serialized Form

Field Summary

Fields inherited from class io.permazen.core.FieldType

name, NAME_PATTERN, REFERENCE_TYPE_NAME, signature, typeToken

Constructor Summary

Constructors

Constructor and Description
DoubleType()

Method Summary

Modifier and Type	Method and Description
protected Double	convertNumber(Number value)
Double	read(ByteReader reader) Read a value from the given input.
void	skip(ByteReader reader) Read and discard a value from the given input.
Double	validate(Object obj) Verify the given object is a valid instance of this FieldType's Java type and cast it to that type.
void	write(ByteWriter writer, Double value) Write a value to the given output.

Methods inherited from class io.permazen.core.type.PrimitiveType

compare, convert, equals, fromParseableString, hashCode, toParseableString

Methods inherited from class io.permazen.core.FieldType

fromString, genericizeForIndex, getDefaultValue, getDefaultValueObject, getEncodingSignature, getKeyRange, getName, getTypeToken, hasPrefix0x00, hasPrefix0xff, toString, toString, validateAndWrite

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

DoubleType

public DoubleType()

Method Detail

read

public Double read(ByteReader reader)

Description copied from class: FieldType

Read a value from the given input.

Specified by:

read in class FieldType<Double>

Parameters:

reader - byte input

Returns:

field value (possibly null)

write

public void write(ByteWriter writer,
                  Double value)

Description copied from class: FieldType

Write a value to the given output.

Specified by:

write in class FieldType<Double>

Parameters:

writer - byte output

value - value to write (possibly null)

skip

public void skip(ByteReader reader)

Description copied from class: FieldType

Read and discard a value from the given input.

Specified by:

skip in class FieldType<Double>

Parameters:

reader - byte input

validate

public Double validate(Object obj)

Description copied from class: FieldType

Verify the given object is a valid instance of this FieldType's Java type and cast it to that type.

Note that this method must throw IllegalArgumentException, not ClassCastException or NullPointerException, if obj does not have the correct type, or is an illegal null value.

This method is allowed to perform widening conversions of the object that lose no information, e.g., from Integer to Long.

The implementation in FieldType simply casts the value using this instance's raw Java type. Subclasses should override this method to implement any other restrictions, e.g., disallowing null values.

Overrides:

validate in class PrimitiveType<Double>

Parameters:

obj - object to validate

Returns:

obj cast to this field's type

convertNumber

protected Double convertNumber(Number value)

Specified by:

convertNumber in class PrimitiveType<Double>