public abstract class PrimitiveType<T> extends NonNullFieldType<T>
name, NAME_PATTERN, REFERENCE_TYPE_NAME, signature, typeToken| Modifier | Constructor and Description |
|---|---|
protected |
PrimitiveType(Primitive<T> primitive) |
| Modifier and Type | Method and Description |
|---|---|
int |
compare(T value1,
T value2)
Order two field values.
|
<S> T |
convert(FieldType<S> type,
S value)
|
protected abstract T |
convertNumber(Number value) |
boolean |
equals(Object obj) |
T |
fromParseableString(ParseContext ctx)
Parse a value previously encoded by
toParseableString() as a self-delimited String
and positioned at the start of the given parsing context. |
int |
hashCode() |
String |
toParseableString(T value)
Encode a possibly null value as a
String for later decoding by fromParseableString(). |
T |
validate(Object obj)
Verify the given object is a valid instance of this
FieldType's Java type and cast it to that type. |
fromString, genericizeForIndex, getDefaultValue, getDefaultValueObject, getEncodingSignature, getKeyRange, getName, getTypeToken, hasPrefix0x00, hasPrefix0xff, read, skip, toString, toString, validateAndWrite, writeclone, finalize, getClass, notify, notifyAll, wait, wait, waitcomparing, comparing, comparingDouble, comparingInt, comparingLong, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLongpublic T fromParseableString(ParseContext ctx)
FieldTypetoParseableString() as a self-delimited String
and positioned at the start of the given parsing context.fromParseableString in class FieldType<T>ctx - parse context starting with a string previously encoded via toParseableString()public String toParseableString(T value)
FieldTypeString for later decoding by fromParseableString().
The string value must be self-delimiting, i.e., decodable even when followed by arbitrary additional characters,
and must not start with whitespace or closing square bracket ("]").
In addition, each of the characters in the returned String must be one of the valid XML characters
(tab, newline, carriage return, \u0020 - \ud7ff, and \ue000 - \fffdf).
toParseableString in class FieldType<T>value - actual value (possibly null)value acceptable to fromParseableString()public T validate(Object obj)
FieldTypeFieldType'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.
validate in class NonNullFieldType<T>obj - object to validateobj cast to this field's typepublic int compare(T value1, T value2)
FieldType
This method must provide a total ordering of all supported Java values that is consistent with the database ordering,
i.e., the unsigned lexicographical ordering of the corresponding byte[] encoded field values.
If null is a supported Java value, then the returned Comparator must accept null parameters without
throwing an exception (note, this is a stronger requirement than the Comparator interface normally requires).
Note: by convention, null values usually sort last.
public <S> T convert(FieldType<S> type, S value)
FieldTypeFieldType into a value of this FieldType.
For a non-null value, the implementation in FieldType first checks whether the value is already
a valid value for this type; if so, the value is returned. Otherwise, it invokes type.toString(value) to convert value into a String, and then attempts to parse that string via
this.fromString(); if the parse fails, an IllegalArgumentException is thrown.
If value is null, the implementation in FieldType returns null, unless this type does not support null
values, in which case an IllegalArgumentException is thrown.
Special handling also exists for certain conversions between built-in types:
value != 0char and a String of length one are convertible (other Strings are not)char[] array and a String are convertibleCopyright © 2020. All rights reserved.