public abstract class ValueInstantiator extends Object
Note that this type is not parameterized (even though it would seemingly
make sense), because such type information cannot be use effectively
during runtime: access is always using either wildcard type, or just
basic Object
; and so adding type parameter seems
like unnecessary extra work.
Actual implementations are strongly recommended to be based on
StdValueInstantiator
which implements all methods, and as such will be compatible
across versions even if new methods were added to this interface.
Modifier and Type | Class and Description |
---|---|
static class |
ValueInstantiator.Base
Partial
ValueInstantiator implementation that is strongly recommended
to be used instead of directly extending ValueInstantiator itself. |
static class |
ValueInstantiator.Delegating
Delegating
ValueInstantiator implementation meant as a base type
that by default delegates methods to specified fallback instantiator. |
static interface |
ValueInstantiator.Gettable |
Constructor and Description |
---|
ValueInstantiator() |
Modifier and Type | Method and Description |
---|---|
protected Object |
_createFromStringFallbacks(DeserializationContext ctxt,
String value)
Deprecated.
Since 2.12 should not handle coercions here
|
boolean |
canCreateFromBigDecimal()
Method that can be called to check whether a BigDecimal based creator is available
to use (to call
createFromBigDecimal(com.fasterxml.jackson.databind.DeserializationContext, java.math.BigDecimal) ). |
boolean |
canCreateFromBigInteger()
Method that can be called to check whether a BigInteger based creator is available
to use (to call
createFromBigInteger(com.fasterxml.jackson.databind.DeserializationContext, java.math.BigInteger) ). |
boolean |
canCreateFromBoolean()
Method that can be called to check whether a double (boolean / Boolean) based
creator is available to use (to call
createFromDouble(com.fasterxml.jackson.databind.DeserializationContext, double) ). |
boolean |
canCreateFromDouble()
Method that can be called to check whether a double (double / Double) based
creator is available to use (to call
createFromDouble(com.fasterxml.jackson.databind.DeserializationContext, double) ). |
boolean |
canCreateFromInt()
Method that can be called to check whether an integer (int, Integer) based
creator is available to use (to call
createFromInt(com.fasterxml.jackson.databind.DeserializationContext, int) ). |
boolean |
canCreateFromLong()
Method that can be called to check whether a long (long, Long) based
creator is available to use (to call
createFromLong(com.fasterxml.jackson.databind.DeserializationContext, long) ). |
boolean |
canCreateFromObjectWith()
Method that can be called to check whether a property-based creator
(argument-taking constructor or factory method)
is available to instantiate values from JSON Object
|
boolean |
canCreateFromString()
Method that can be called to check whether a String-based creator
is available for this instantiator.
|
boolean |
canCreateUsingArrayDelegate()
Method that can be called to check whether a array-delegate-based creator
(single-arg constructor or factory method)
is available for this instantiator
|
boolean |
canCreateUsingDefault()
Method that can be called to check whether a default creator (constructor,
or no-arg static factory method)
is available for this instantiator
|
boolean |
canCreateUsingDelegate()
Method that can be called to check whether a delegate-based creator (single-arg
constructor or factory method)
is available for this instantiator
|
boolean |
canInstantiate()
Method that will return true if any of
canCreateXxx method
returns true: that is, if there is any way that an instance could
be created. |
ValueInstantiator |
createContextual(DeserializationContext ctxt,
BeanDescription beanDesc)
"Contextualization" method that is called after construction but before first
use, to allow instantiator access to context needed to possible resolve its
dependencies.
|
Object |
createFromBigDecimal(DeserializationContext ctxt,
BigDecimal value) |
Object |
createFromBigInteger(DeserializationContext ctxt,
BigInteger value) |
Object |
createFromBoolean(DeserializationContext ctxt,
boolean value) |
Object |
createFromDouble(DeserializationContext ctxt,
double value) |
Object |
createFromInt(DeserializationContext ctxt,
int value) |
Object |
createFromLong(DeserializationContext ctxt,
long value) |
Object |
createFromObjectWith(DeserializationContext ctxt,
Object[] args)
Method called to create value instance from JSON Object when
instantiation arguments are passed; this is done, for example when passing information
specified with "Creator" annotations.
|
Object |
createFromObjectWith(DeserializationContext ctxt,
SettableBeanProperty[] props,
PropertyValueBuffer buffer)
Method that delegates to
createFromObjectWith(DeserializationContext, Object[]) by
default, but can be overridden if the application should have customized
behavior with respect to missing properties. |
Object |
createFromString(DeserializationContext ctxt,
String value) |
Object |
createUsingArrayDelegate(DeserializationContext ctxt,
Object delegate)
Method to called to create value instance from JSON Array using
an intermediate "delegate" value to pass to createor method
|
Object |
createUsingDefault(DeserializationContext ctxt)
Method called to create value instance from a JSON value when
no data needs to passed to creator (constructor, factory method);
typically this will call the default constructor of the value object.
|
Object |
createUsingDelegate(DeserializationContext ctxt,
Object delegate)
Method to called to create value instance from JSON Object using
an intermediate "delegate" value to pass to createor method
|
AnnotatedWithParams |
getArrayDelegateCreator()
Method that can be called to try to access member (constructor,
static factory method) that is used as the "array delegate creator".
|
JavaType |
getArrayDelegateType(DeserializationConfig config)
Method that can be used to determine what is the type of array delegate
type to use, if any; if no delegates are used, will return null.
|
AnnotatedWithParams |
getDefaultCreator()
Method that can be called to try to access member (constructor,
static factory method) that is used as the "default creator"
(creator that is called without arguments; typically default
[zero-argument] constructor of the type).
|
AnnotatedWithParams |
getDelegateCreator()
Method that can be called to try to access member (constructor,
static factory method) that is used as the "delegate creator".
|
JavaType |
getDelegateType(DeserializationConfig config)
Method that can be used to determine what is the type of delegate
type to use, if any; if no delegates are used, will return null.
|
SettableBeanProperty[] |
getFromObjectArguments(DeserializationConfig config)
Method called to determine types of instantiation arguments
to use when creating instances with creator arguments
(when
canCreateFromObjectWith() returns true). |
Class<?> |
getValueClass()
Accessor for raw (type-erased) type of instances to create.
|
String |
getValueTypeDesc()
Method that returns description of the value type this instantiator
handles.
|
AnnotatedWithParams |
getWithArgsCreator()
Method that can be called to try to access member (constructor,
static factory method) that is used as the "non-default creator"
(constructor or factory method that takes one or more arguments).
|
public ValueInstantiator createContextual(DeserializationContext ctxt, BeanDescription beanDesc) throws JsonMappingException
ctxt
- Currently active deserialization context: needed to (for example)
resolving TypeDeserializer
s.JsonMappingException
- If there are issues with contextualizationpublic Class<?> getValueClass()
NOTE: since this method has not existed since beginning of
Jackson 2.0 series, default implementation will just return
Object.class
; implementations are expected
to override it with real value.
public String getValueTypeDesc()
public boolean canInstantiate()
canCreateXxx
method
returns true: that is, if there is any way that an instance could
be created.public boolean canCreateFromString()
NOTE: does NOT include possible case of fallbacks, or coercion; only considers explicit creator.
public boolean canCreateFromInt()
createFromInt(com.fasterxml.jackson.databind.DeserializationContext, int)
).public boolean canCreateFromLong()
createFromLong(com.fasterxml.jackson.databind.DeserializationContext, long)
).public boolean canCreateFromBigInteger()
createFromBigInteger(com.fasterxml.jackson.databind.DeserializationContext, java.math.BigInteger)
). +public boolean canCreateFromDouble()
createFromDouble(com.fasterxml.jackson.databind.DeserializationContext, double)
).public boolean canCreateFromBigDecimal()
createFromBigDecimal(com.fasterxml.jackson.databind.DeserializationContext, java.math.BigDecimal)
).public boolean canCreateFromBoolean()
createFromDouble(com.fasterxml.jackson.databind.DeserializationContext, double)
).public boolean canCreateUsingDefault()
public boolean canCreateUsingDelegate()
public boolean canCreateUsingArrayDelegate()
public boolean canCreateFromObjectWith()
public SettableBeanProperty[] getFromObjectArguments(DeserializationConfig config)
canCreateFromObjectWith()
returns true).
These arguments are bound from JSON, using specified
property types to locate deserializers.
NOTE: all properties will be of type
CreatorProperty
.
public JavaType getDelegateType(DeserializationConfig config)
public JavaType getArrayDelegateType(DeserializationConfig config)
public Object createUsingDefault(DeserializationContext ctxt) throws IOException
This method is called if getFromObjectArguments(com.fasterxml.jackson.databind.DeserializationConfig)
returns
null or empty List.
IOException
public Object createFromObjectWith(DeserializationContext ctxt, Object[] args) throws IOException
This method is called if getFromObjectArguments(com.fasterxml.jackson.databind.DeserializationConfig)
returns
a non-empty List of arguments.
IOException
public Object createFromObjectWith(DeserializationContext ctxt, SettableBeanProperty[] props, PropertyValueBuffer buffer) throws IOException
createFromObjectWith(DeserializationContext, Object[])
by
default, but can be overridden if the application should have customized
behavior with respect to missing properties.
The default implementation of this method uses
PropertyValueBuffer.getParameters(SettableBeanProperty[])
to read
and validate all properties in bulk, possibly substituting defaults for
missing properties or throwing exceptions for missing properties. An
overridden implementation of this method could, for example, use
PropertyValueBuffer.hasParameter(SettableBeanProperty)
and
PropertyValueBuffer.getParameter(SettableBeanProperty)
to safely
read the present properties only, and to have some other behavior for the
missing properties.
IOException
public Object createUsingDelegate(DeserializationContext ctxt, Object delegate) throws IOException
IOException
public Object createUsingArrayDelegate(DeserializationContext ctxt, Object delegate) throws IOException
IOException
public Object createFromString(DeserializationContext ctxt, String value) throws IOException
IOException
public Object createFromInt(DeserializationContext ctxt, int value) throws IOException
IOException
public Object createFromLong(DeserializationContext ctxt, long value) throws IOException
IOException
public Object createFromBigInteger(DeserializationContext ctxt, BigInteger value) throws IOException
IOException
public Object createFromDouble(DeserializationContext ctxt, double value) throws IOException
IOException
public Object createFromBigDecimal(DeserializationContext ctxt, BigDecimal value) throws IOException
IOException
public Object createFromBoolean(DeserializationContext ctxt, boolean value) throws IOException
IOException
public AnnotatedWithParams getDefaultCreator()
canCreateUsingDefault()
returns true,
this method may return null .public AnnotatedWithParams getDelegateCreator()
canCreateUsingDelegate()
returns true,
this method may return null .public AnnotatedWithParams getArrayDelegateCreator()
canCreateUsingArrayDelegate()
returns true,
this method may return null .public AnnotatedWithParams getWithArgsCreator()
canCreateFromObjectWith()
returns true,
this method may return null .@Deprecated protected Object _createFromStringFallbacks(DeserializationContext ctxt, String value) throws IOException
IOException
StdValueInstantiator
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