Package org.codehaus.jackson.map.deser.std

Class StdValueInstantiator

java.lang.Object

org.codehaus.jackson.map.deser.ValueInstantiator

org.codehaus.jackson.map.deser.std.StdValueInstantiator

public class StdValueInstantiator
extends ValueInstantiator

Basic ValueInstantiator implementation, which only supports use of default constructor. Sub-types can add support for alternate construction methods, such as using argument-taking constructors or static factory methods.

Since:

1.9.0

Field Summary

Fields

Modifier and Type	Field	Description
protected final boolean	_cfgEmptyStringsAsObjects	Are we allowed to convert empty Strings to null objects?
protected CreatorProperty[]	_constructorArguments
protected AnnotatedWithParams	_defaultCreator	Default (no-argument) constructor to use for instantiation (with createUsingDefault())
protected AnnotatedWithParams	_delegateCreator
protected JavaType	_delegateType
protected AnnotatedWithParams	_fromBooleanCreator
protected AnnotatedWithParams	_fromDoubleCreator
protected AnnotatedWithParams	_fromIntCreator
protected AnnotatedWithParams	_fromLongCreator
protected AnnotatedWithParams	_fromStringCreator
protected final String	_valueTypeDesc	Type of values that are instantiated; used for error reporting purposes.
protected AnnotatedWithParams	_withArgsCreator

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	StdValueInstantiator(StdValueInstantiator src)	Copy-constructor that sub-classes can use when creating new instances by fluent-style construction
	StdValueInstantiator(DeserializationConfig config, Class<?> valueType)
	StdValueInstantiator(DeserializationConfig config, JavaType valueType)

Method Summary

Modifier and Type	Method	Description
protected Object	_createFromStringFallbacks(String value)
boolean	canCreateFromBoolean()	Method that can be called to check whether a double (boolean / Boolean) based creator is available to use (to call ValueInstantiator.createFromDouble(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(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(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(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	canCreateUsingDefault()	Method that can be called to check whether a default creator (constructor, or no-arg static factory method) is available for this instantiator
void	configureFromBooleanCreator(AnnotatedWithParams creator)
void	configureFromDoubleCreator(AnnotatedWithParams creator)
void	configureFromIntCreator(AnnotatedWithParams creator)
void	configureFromLongCreator(AnnotatedWithParams creator)
void	configureFromObjectSettings(AnnotatedWithParams defaultCreator, AnnotatedWithParams delegateCreator, JavaType delegateType, AnnotatedWithParams withArgsCreator, CreatorProperty[] constructorArgs)	Method for setting properties related to instantiating values from JSON Object.
void	configureFromStringCreator(AnnotatedWithParams creator)
Object	createFromBoolean(boolean value)
Object	createFromDouble(double value)
Object	createFromInt(int value)
Object	createFromLong(long value)
Object	createFromObjectWith(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	createFromString(String value)
Object	createUsingDefault()	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(Object delegate)	Method to called to create value instance from JSON Object using an intermediate "delegate" value to pass to createor method
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()	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()	Method called to determine types of instantiation arguments to use when creating instances with creator arguments (when ValueInstantiator.canCreateFromObjectWith() returns true).
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).
protected JsonMappingException	wrapException(Throwable t)

Methods inherited from class org.codehaus.jackson.map.deser.ValueInstantiator

canCreateUsingDelegate, canInstantiate

Methods inherited from class java.lang.Object

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

Field Details

_valueTypeDesc

protected final String _valueTypeDesc

Type of values that are instantiated; used for error reporting purposes.

_cfgEmptyStringsAsObjects

protected final boolean _cfgEmptyStringsAsObjects

Are we allowed to convert empty Strings to null objects?

_defaultCreator

protected AnnotatedWithParams _defaultCreator

Default (no-argument) constructor to use for instantiation (with createUsingDefault())

_constructorArguments

protected CreatorProperty[] _constructorArguments

_withArgsCreator

protected AnnotatedWithParams _withArgsCreator

_delegateType

protected JavaType _delegateType

_delegateCreator

protected AnnotatedWithParams _delegateCreator

_fromStringCreator

protected AnnotatedWithParams _fromStringCreator

_fromIntCreator

protected AnnotatedWithParams _fromIntCreator

_fromLongCreator

protected AnnotatedWithParams _fromLongCreator

_fromDoubleCreator

protected AnnotatedWithParams _fromDoubleCreator

_fromBooleanCreator

protected AnnotatedWithParams _fromBooleanCreator

Constructor Details

StdValueInstantiator

public StdValueInstantiator(DeserializationConfig config,
 Class<?> valueType)

StdValueInstantiator

public StdValueInstantiator(DeserializationConfig config,
 JavaType valueType)

StdValueInstantiator

protected StdValueInstantiator(StdValueInstantiator src)

Copy-constructor that sub-classes can use when creating new instances by fluent-style construction

Method Details

configureFromObjectSettings

public void configureFromObjectSettings(AnnotatedWithParams defaultCreator,
 AnnotatedWithParams delegateCreator,
 JavaType delegateType,
 AnnotatedWithParams withArgsCreator,
 CreatorProperty[] constructorArgs)

Method for setting properties related to instantiating values from JSON Object. We will choose basically only one approach (out of possible three), and clear other properties

configureFromStringCreator

public void configureFromStringCreator(AnnotatedWithParams creator)

configureFromIntCreator

public void configureFromIntCreator(AnnotatedWithParams creator)

configureFromLongCreator

public void configureFromLongCreator(AnnotatedWithParams creator)

configureFromDoubleCreator

public void configureFromDoubleCreator(AnnotatedWithParams creator)

configureFromBooleanCreator

public void configureFromBooleanCreator(AnnotatedWithParams creator)

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.

Specified by:

getValueTypeDesc 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

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(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(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(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(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

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

getDelegateType

public JavaType getDelegateType()

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

getFromObjectArguments

public SettableBeanProperty[] getFromObjectArguments()

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

createUsingDefault

public Object createUsingDefault()
                          throws IOException,
JsonProcessingException

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() returns null or empty List.

Overrides:

createUsingDefault in class ValueInstantiator

Throws:

IOException

JsonProcessingException

createFromObjectWith

public Object createFromObjectWith(Object[] args)
                            throws IOException,
JsonProcessingException

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() returns a non-empty List of arguments.

Overrides:

createFromObjectWith in class ValueInstantiator

Throws:

IOException

JsonProcessingException

createUsingDelegate

public Object createUsingDelegate(Object delegate)
                           throws IOException,
JsonProcessingException

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

JsonProcessingException

createFromString

public Object createFromString(String value)
                        throws IOException,
JsonProcessingException

Overrides:

createFromString in class ValueInstantiator

Throws:

IOException

JsonProcessingException

createFromInt

public Object createFromInt(int value)
                     throws IOException,
JsonProcessingException

Overrides:

createFromInt in class ValueInstantiator

Throws:

IOException

JsonProcessingException

createFromLong

public Object createFromLong(long value)
                      throws IOException,
JsonProcessingException

Overrides:

createFromLong in class ValueInstantiator

Throws:

IOException

JsonProcessingException

createFromDouble

public Object createFromDouble(double value)
                        throws IOException,
JsonProcessingException

Overrides:

createFromDouble in class ValueInstantiator

Throws:

IOException

JsonProcessingException

createFromBoolean

public Object createFromBoolean(boolean value)
                         throws IOException,
JsonProcessingException

Overrides:

createFromBoolean in class ValueInstantiator

Throws:

IOException

JsonProcessingException

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

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

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

_createFromStringFallbacks

protected Object _createFromStringFallbacks(String value)
                                     throws IOException,
JsonProcessingException

Throws:

IOException

JsonProcessingException

wrapException

protected JsonMappingException wrapException(Throwable t)