com.fasterxml.jackson.databind.deser

Class ValueInstantiator.Delegating

java.lang.Object

com.fasterxml.jackson.databind.deser.ValueInstantiator

com.fasterxml.jackson.databind.deser.ValueInstantiator.Delegating

All Implemented Interfaces:

Serializable

Enclosing class:

ValueInstantiator

public static class ValueInstantiator.Delegating
extends ValueInstantiator
implements Serializable

Delegating ValueInstantiator implementation meant as a base type that by default delegates methods to specified fallback instantiator.

Since:

2.12

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.fasterxml.jackson.databind.deser.ValueInstantiator

ValueInstantiator.Base, ValueInstantiator.Delegating, ValueInstantiator.Gettable

Field Summary

Fields

Modifier and Type	Field and Description
protected ValueInstantiator	_delegate

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Delegating(ValueInstantiator delegate)

Method Summary

Modifier and Type	Method and Description
boolean	canCreateFromBoolean() Method that can be called to check whether a double (boolean / Boolean) based creator is available to use (to call ValueInstantiator.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 ValueInstantiator.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 ValueInstantiator.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 ValueInstantiator.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 ValueInstantiator.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
protected ValueInstantiator	delegate()
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 ValueInstantiator.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).

Methods inherited from class com.fasterxml.jackson.databind.deser.ValueInstantiator

_createFromStringFallbacks, canCreateFromBigDecimal, canCreateFromBigInteger, createUsingDefaultOrWithoutArguments

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

_delegate

protected final ValueInstantiator _delegate

Constructor Detail

Delegating

protected Delegating(ValueInstantiator delegate)

Method Detail

createContextual

public ValueInstantiator createContextual(DeserializationContext ctxt,
                                          BeanDescription beanDesc)
                                   throws JsonMappingException

Description copied from class: ValueInstantiator

"Contextualization" method that is called after construction but before first use, to allow instantiator access to context needed to possible resolve its dependencies.

Overrides:

createContextual in class ValueInstantiator

Parameters:

ctxt - Currently active deserialization context: needed to (for example) resolving TypeDeserializers.

Returns:

This instance, if no change, or newly constructed instance

Throws:

JsonMappingException - If there are issues with contextualization

delegate

protected ValueInstantiator delegate()

getValueClass

public Class<?> getValueClass()

Description copied from class: ValueInstantiator

Accessor for raw (type-erased) type of instances to create.

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.

Overrides:

getValueClass in class ValueInstantiator

getValueTypeDesc

public String getValueTypeDesc()

Description copied from class: ValueInstantiator

Method that returns description of the value type this instantiator handles. Used for error messages, diagnostics.

Overrides:

getValueTypeDesc in class ValueInstantiator

canInstantiate

public boolean canInstantiate()

Description copied from class: ValueInstantiator

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.

Overrides:

canInstantiate in class ValueInstantiator

canCreateFromString

public boolean canCreateFromString()

Description copied from class: ValueInstantiator

Method that can be called to check whether a String-based creator is available for this instantiator.

NOTE: does NOT include possible case of fallbacks, or coercion; only considers explicit creator.

Overrides:

canCreateFromString in class ValueInstantiator

canCreateFromInt

public boolean canCreateFromInt()

Description copied from class: ValueInstantiator

Method that can be called to check whether an integer (int, Integer) based creator is available to use (to call ValueInstantiator.createFromInt(com.fasterxml.jackson.databind.DeserializationContext, int)).

Overrides:

canCreateFromInt in class ValueInstantiator

canCreateFromLong

public boolean canCreateFromLong()

Description copied from class: ValueInstantiator

Method that can be called to check whether a long (long, Long) based creator is available to use (to call ValueInstantiator.createFromLong(com.fasterxml.jackson.databind.DeserializationContext, long)).

Overrides:

canCreateFromLong in class ValueInstantiator

canCreateFromDouble

public boolean canCreateFromDouble()

Description copied from class: ValueInstantiator

Method that can be called to check whether a double (double / Double) based creator is available to use (to call ValueInstantiator.createFromDouble(com.fasterxml.jackson.databind.DeserializationContext, double)).

Overrides:

canCreateFromDouble in class ValueInstantiator

canCreateFromBoolean

public boolean canCreateFromBoolean()

Description copied from class: ValueInstantiator

Method that can be called to check whether a double (boolean / Boolean) based creator is available to use (to call ValueInstantiator.createFromDouble(com.fasterxml.jackson.databind.DeserializationContext, double)).

Overrides:

canCreateFromBoolean in class ValueInstantiator

canCreateUsingDefault

public boolean canCreateUsingDefault()

Description copied from class: ValueInstantiator

Method that can be called to check whether a default creator (constructor, or no-arg static factory method) is available for this instantiator

Overrides:

canCreateUsingDefault in class ValueInstantiator

canCreateUsingDelegate

public boolean canCreateUsingDelegate()

Description copied from class: ValueInstantiator

Method that can be called to check whether a delegate-based creator (single-arg constructor or factory method) is available for this instantiator

Overrides:

canCreateUsingDelegate in class ValueInstantiator

canCreateUsingArrayDelegate

public boolean canCreateUsingArrayDelegate()

Description copied from class: ValueInstantiator

Method that can be called to check whether a array-delegate-based creator (single-arg constructor or factory method) is available for this instantiator

Overrides:

canCreateUsingArrayDelegate in class ValueInstantiator

canCreateFromObjectWith

public boolean canCreateFromObjectWith()

Description copied from class: ValueInstantiator

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

Overrides:

canCreateFromObjectWith in class ValueInstantiator

getFromObjectArguments

public SettableBeanProperty[] getFromObjectArguments(DeserializationConfig config)

Description copied from class: ValueInstantiator

Method called to determine types of instantiation arguments to use when creating instances with creator arguments (when ValueInstantiator.canCreateFromObjectWith() returns true). These arguments are bound from JSON, using specified property types to locate deserializers.

NOTE: all properties will be of type CreatorProperty.

Overrides:

getFromObjectArguments in class ValueInstantiator

getDelegateType

public JavaType getDelegateType(DeserializationConfig config)

Description copied from class: ValueInstantiator

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. If non-null type is returned, deserializer will bind JSON into specified type (using standard deserializer for that type), and pass that to instantiator.

Overrides:

getDelegateType in class ValueInstantiator

getArrayDelegateType

public JavaType getArrayDelegateType(DeserializationConfig config)

Description copied from class: ValueInstantiator

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. If non-null type is returned, deserializer will bind JSON into specified type (using standard deserializer for that type), and pass that to instantiator.

Overrides:

getArrayDelegateType in class ValueInstantiator

createUsingDefault

public Object createUsingDefault(DeserializationContext ctxt)
                          throws IOException

Description copied from class: ValueInstantiator

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. It will only be used if more specific creator methods are not applicable; hence "default".

This method is called if ValueInstantiator.getFromObjectArguments(com.fasterxml.jackson.databind.DeserializationConfig) returns null or empty List.

Overrides:

createUsingDefault in class ValueInstantiator

Throws:

IOException

createFromObjectWith

public Object createFromObjectWith(DeserializationContext ctxt,
                                   Object[] args)
                            throws IOException

Description copied from class: ValueInstantiator

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.

This method is called if ValueInstantiator.getFromObjectArguments(com.fasterxml.jackson.databind.DeserializationConfig) returns a non-empty List of arguments.

Overrides:

createFromObjectWith in class ValueInstantiator

Throws:

IOException

createFromObjectWith

public Object createFromObjectWith(DeserializationContext ctxt,
                                   SettableBeanProperty[] props,
                                   PropertyValueBuffer buffer)
                            throws IOException

Description copied from class: ValueInstantiator

Method that delegates to ValueInstantiator.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.

Overrides:

createFromObjectWith in class ValueInstantiator

Throws:

IOException

createUsingDelegate

public Object createUsingDelegate(DeserializationContext ctxt,
                                  Object delegate)
                           throws IOException

Description copied from class: ValueInstantiator

Method to called to create value instance from JSON Object using an intermediate "delegate" value to pass to createor method

Overrides:

createUsingDelegate in class ValueInstantiator

Throws:

IOException

createUsingArrayDelegate

public Object createUsingArrayDelegate(DeserializationContext ctxt,
                                       Object delegate)
                                throws IOException

Description copied from class: ValueInstantiator

Method to called to create value instance from JSON Array using an intermediate "delegate" value to pass to createor method

Overrides:

createUsingArrayDelegate in class ValueInstantiator

Throws:

IOException

createFromString

public Object createFromString(DeserializationContext ctxt,
                               String value)
                        throws IOException

Overrides:

createFromString in class ValueInstantiator

Throws:

IOException

createFromInt

public Object createFromInt(DeserializationContext ctxt,
                            int value)
                     throws IOException

Overrides:

createFromInt in class ValueInstantiator

Throws:

IOException

createFromLong

public Object createFromLong(DeserializationContext ctxt,
                             long value)
                      throws IOException

Overrides:

createFromLong in class ValueInstantiator

Throws:

IOException

createFromBigInteger

public Object createFromBigInteger(DeserializationContext ctxt,
                                   BigInteger value)
                            throws IOException

Overrides:

createFromBigInteger in class ValueInstantiator

Throws:

IOException

createFromDouble

public Object createFromDouble(DeserializationContext ctxt,
                               double value)
                        throws IOException

Overrides:

createFromDouble in class ValueInstantiator

Throws:

IOException

createFromBigDecimal

public Object createFromBigDecimal(DeserializationContext ctxt,
                                   BigDecimal value)
                            throws IOException

Overrides:

createFromBigDecimal in class ValueInstantiator

Throws:

IOException

createFromBoolean

public Object createFromBoolean(DeserializationContext ctxt,
                                boolean value)
                         throws IOException

Overrides:

createFromBoolean in class ValueInstantiator

Throws:

IOException

getDefaultCreator

public AnnotatedWithParams getDefaultCreator()

Description copied from class: ValueInstantiator

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). Note that implementations not required to return actual object they use (or, they may use some other instantiation) method. That is, even if ValueInstantiator.canCreateUsingDefault() returns true, this method may return null .

Overrides:

getDefaultCreator in class ValueInstantiator

getDelegateCreator

public AnnotatedWithParams getDelegateCreator()

Description copied from class: ValueInstantiator

Method that can be called to try to access member (constructor, static factory method) that is used as the "delegate creator". Note that implementations not required to return actual object they use (or, they may use some other instantiation) method. That is, even if ValueInstantiator.canCreateUsingDelegate() returns true, this method may return null .

Overrides:

getDelegateCreator in class ValueInstantiator

getArrayDelegateCreator

public AnnotatedWithParams getArrayDelegateCreator()

Description copied from class: ValueInstantiator

Method that can be called to try to access member (constructor, static factory method) that is used as the "array delegate creator". Note that implementations not required to return actual object they use (or, they may use some other instantiation) method. That is, even if ValueInstantiator.canCreateUsingArrayDelegate() returns true, this method may return null .

Overrides:

getArrayDelegateCreator in class ValueInstantiator

getWithArgsCreator

public AnnotatedWithParams getWithArgsCreator()

Description copied from class: ValueInstantiator

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). Note that implementations not required to return actual object they use (or, they may use some other instantiation) method. That is, even if ValueInstantiator.canCreateFromObjectWith() returns true, this method may return null .

Overrides:

getWithArgsCreator in class ValueInstantiator