org.codehaus.jackson.map
Class AnnotationIntrospector

java.lang.Object
  extended by org.codehaus.jackson.map.AnnotationIntrospector
Direct Known Subclasses:
AnnotationIntrospector.Pair, JacksonAnnotationIntrospector, JaxbAnnotationIntrospector, NopAnnotationIntrospector

public abstract class AnnotationIntrospector
extends Object

Abstract class that defines API used for introspecting annotation-based configuration for serialization and deserialization. Separated so that different sets of annotations can be supported, and support plugged-in dynamically.


Nested Class Summary
static class AnnotationIntrospector.Pair
          Helper class that allows using 2 introspectors such that one introspector acts as the primary one to use; and second one as a fallback used if the primary does not provide conclusive or useful result for a method.
 
Constructor Summary
AnnotationIntrospector()
           
 
Method Summary
abstract  Boolean findCachability(AnnotatedClass ac)
          Method that checks whether specified class has annotations that indicate that it is (or is not) cachable.
abstract  Class<? extends JsonDeserializer<?>> findContentDeserializer(Annotated am)
          Method for getting a deserializer definition for content (values) of associated Collection, array or Map property.
abstract  Boolean findCreatorAutoDetection(AnnotatedClass ac)
          Method for checking whether there is a class annotation that indicates whether creator-method auto detection should be enabled.
abstract  String findDeserializablePropertyName(AnnotatedField af)
          Method for checking whether given member field represent a deserializable logical property; and if so, returns the name of that property.
abstract  Class<?> findDeserializationContentType(Annotated am)
          Method for accessing additional narrowing type definition that a method can have, to define more specific content type to use; content refers to Map values and Collection/array elements.
abstract  Class<?> findDeserializationKeyType(Annotated am)
          Method for accessing additional narrowing type definition that a method can have, to define more specific key type to use.
abstract  Class<?> findDeserializationType(Annotated am)
          Method for accessing annotated type definition that a method can have, to be used as the type for serialization instead of the runtime type.
abstract  Object findDeserializer(Annotated am)
          Method for getting a deserializer definition on specified method or field.
abstract  String findEnumValue(Enum<?> value)
          Method for determining the String value to use for serializing given enumeration entry; used when serializing enumerations as Strings (the standard method).
abstract  Boolean findFieldAutoDetection(AnnotatedClass ac)
          Method for checking whether there is a class annotation that indicates whether field auto detection should be enabled.
abstract  String findGettablePropertyName(AnnotatedMethod am)
          Method for checking whether given method has an annotation that suggests property name associated with method that may be a "getter".
abstract  Boolean findGetterAutoDetection(AnnotatedClass ac)
          Method for checking whether there is a class annotation that indicates whether (regular) getter-method auto detection should be enabled.
abstract  Boolean findIgnoreUnknownProperties(AnnotatedClass ac)
          Method for checking whether an annotation indicates that all unknown properties
abstract  Boolean findIsGetterAutoDetection(AnnotatedClass ac)
          Method for checking whether there is a class annotation that indicates whether (regular) getter-method auto detection should be enabled.
abstract  Class<? extends KeyDeserializer> findKeyDeserializer(Annotated am)
          Method for getting a deserializer definition for keys of associated Map property.
abstract  String findNamespace(Annotated ann)
          Method that can be called to figure out generic namespace property for an annotated object.
abstract  String[] findPropertiesToIgnore(AnnotatedClass ac)
          Method for finding list of properties to ignore for given class (null is returned if not specified).
abstract  String findPropertyNameForParam(AnnotatedParameter param)
          Method for checking whether given set of annotations indicates property name for associated parameter.
abstract  String findRootName(AnnotatedClass ac)
          Method for locating name used as "root name" (for use by some serializers when outputting root-level object -- mostly for XML compatibility purposes) for given class, if one is defined.
abstract  String findSerializablePropertyName(AnnotatedField af)
          Method for checking whether given member field represent a serializable logical property; and if so, returns the name of that property.
abstract  JsonSerialize.Inclusion findSerializationInclusion(Annotated a, JsonSerialize.Inclusion defValue)
          Method for checking whether given annotated entity (class, method, field) defines which Bean/Map properties are to be included in serialization.
abstract  String[] findSerializationPropertyOrder(AnnotatedClass ac)
          Method for accessing defined property serialization order (which may be partial).
abstract  Boolean findSerializationSortAlphabetically(AnnotatedClass ac)
          Method for checking whether an annotation indicates that serialized properties for which no explicit is defined should be alphabetically (lexicograpically) ordered
abstract  Class<?> findSerializationType(Annotated a)
          Method for accessing annotated type definition that a method/field can have, to be used as the type for serialization instead of the runtime type.
abstract  JsonSerialize.Typing findSerializationTyping(Annotated a)
          Method for accessing declared typing mode annotated (if any).
abstract  Class<?>[] findSerializationViews(Annotated a)
          Method for checking if annotated serializable property (represented by field or getter method) has definitions for views it is to be included in.
abstract  Object findSerializer(Annotated am)
          Method for getting a serializer definition on specified method or field.
abstract  String findSettablePropertyName(AnnotatedMethod am)
          Method for checking whether given method has an annotation that suggests property name associated with method that may be a "setter".
abstract  Boolean findSetterAutoDetection(AnnotatedClass ac)
          Method for checking whether there is a class annotation that indicates whether setter-method auto detection should be enabled.
abstract  boolean hasAnySetterAnnotation(AnnotatedMethod am)
          Method for checking whether given method has an annotation that suggests that the method is to serve as "any setter"; method to be used for setting values of any properties for which no dedicated setter method is found.
abstract  boolean hasAsValueAnnotation(AnnotatedMethod am)
          Method for checking whether given method has an annotation that suggests that the return value of annotated method should be used as "the value" of the object instance; usually serialized as a primitive value such as String or number.
abstract  boolean hasCreatorAnnotation(Annotated a)
          Method for checking whether given annotated item (method, constructor) has an annotation that suggests that the method is a "creator" (aka factory) method to be used for construct new instances of deserialized values.
abstract  boolean isHandled(Annotation ann)
          Method called by framework to determine whether given annotation is handled by this introspector.
abstract  boolean isIgnorableConstructor(AnnotatedConstructor c)
           
abstract  boolean isIgnorableField(AnnotatedField f)
          Method for checking whether there is an annotation that indicates that given field should be ignored for all operations (serialization, deserialization).
abstract  boolean isIgnorableMethod(AnnotatedMethod m)
          Method for checking whether there is an annotation that indicates that given method should be ignored for all operations (serialization, deserialization).
static AnnotationIntrospector nopInstance()
          Factory method for accessing "no operation" implementation of introspector: instance that will never find any annotation-based configuration.
static AnnotationIntrospector pair(AnnotationIntrospector a1, AnnotationIntrospector a2)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

AnnotationIntrospector

public AnnotationIntrospector()
Method Detail

nopInstance

public static AnnotationIntrospector nopInstance()
Factory method for accessing "no operation" implementation of introspector: instance that will never find any annotation-based configuration.

Since:
1.3

pair

public static AnnotationIntrospector pair(AnnotationIntrospector a1,
                                          AnnotationIntrospector a2)

isHandled

public abstract boolean isHandled(Annotation ann)
Method called by framework to determine whether given annotation is handled by this introspector.


findNamespace

public abstract String findNamespace(Annotated ann)
Method that can be called to figure out generic namespace property for an annotated object. Most commonly used for XML compatibility purposes (since currently only JAXB annotations provide namespace information), but theoretically is not limited to XML.

Returns:
Null if annotated thing does not define any namespace information; non-null namespace (which may be empty String) otherwise

findCachability

public abstract Boolean findCachability(AnnotatedClass ac)
Method that checks whether specified class has annotations that indicate that it is (or is not) cachable. Exact semantics depend on type of class annotated and using class (factory or provider).

Currently only used with deserializers, to determine whether provider should cache instances, and if no annotations are found, assumes non-cachable instances.

Returns:
True, if class is considered cachable within context, False if not, and null if introspector does not care either way.

findFieldAutoDetection

public abstract Boolean findFieldAutoDetection(AnnotatedClass ac)
Method for checking whether there is a class annotation that indicates whether field auto detection should be enabled.

Returns:
null if no relevant annotation is located; Boolean.TRUE if enabling annotation found, Boolean.FALSE if disabling annotation

findRootName

public abstract String findRootName(AnnotatedClass ac)
Method for locating name used as "root name" (for use by some serializers when outputting root-level object -- mostly for XML compatibility purposes) for given class, if one is defined. Returns null if no declaration found; can return explicit empty String, which is usually ignored as well as null.

Since:
1.3

findPropertiesToIgnore

public abstract String[] findPropertiesToIgnore(AnnotatedClass ac)
Method for finding list of properties to ignore for given class (null is returned if not specified). List of property names is applied after other detection mechanisms, to filter out these specific properties from being serialized and deserialized.

Since:
1.4

findIgnoreUnknownProperties

public abstract Boolean findIgnoreUnknownProperties(AnnotatedClass ac)
Method for checking whether an annotation indicates that all unknown properties

Since:
1.4

isIgnorableMethod

public abstract boolean isIgnorableMethod(AnnotatedMethod m)
Method for checking whether there is an annotation that indicates that given method should be ignored for all operations (serialization, deserialization).

Note that this method should ONLY return true for such explicit ignoral cases; and not if method just happens not to be visible for annotation processor.

Returns:
True, if an annotation is found to indicate that the method should be ignored; false if not.

isIgnorableConstructor

public abstract boolean isIgnorableConstructor(AnnotatedConstructor c)
Since:
1.2

isIgnorableField

public abstract boolean isIgnorableField(AnnotatedField f)
Method for checking whether there is an annotation that indicates that given field should be ignored for all operations (serialization, deserialization).

Returns:
True, if an annotation is found to indicate that the field should be ignored; false if not.

findSerializer

public abstract Object findSerializer(Annotated am)
Method for getting a serializer definition on specified method or field. Type of definition is either instance (of type JsonSerializer) or Class (of type Class); if value of different type is returned, a runtime exception may be thrown by caller.


findSerializationInclusion

public abstract JsonSerialize.Inclusion findSerializationInclusion(Annotated a,
                                                                   JsonSerialize.Inclusion defValue)
Method for checking whether given annotated entity (class, method, field) defines which Bean/Map properties are to be included in serialization. If no annotation is found, method should return given second argument; otherwise value indicated by the annotation

Returns:
Enumerated value indicating which properties to include in serialization

findSerializationType

public abstract Class<?> findSerializationType(Annotated a)
Method for accessing annotated type definition that a method/field can have, to be used as the type for serialization instead of the runtime type. Type returned (if any) needs to be widening conversion (super-type). Declared return type of the method is also considered acceptable.

Returns:
Class to use instead of runtime type

findSerializationTyping

public abstract JsonSerialize.Typing findSerializationTyping(Annotated a)
Method for accessing declared typing mode annotated (if any). This is used for type detection, unless more granular settings (such as actual exact type; or serializer to use which means no type information is needed) take precedence.

Returns:
Typing mode to use, if annotation is found; null otherwise
Since:
1.2

findSerializationViews

public abstract Class<?>[] findSerializationViews(Annotated a)
Method for checking if annotated serializable property (represented by field or getter method) has definitions for views it is to be included in. If null is returned, no view definitions exist and property is always included; otherwise it will only be included for views included in returned array. View matches are checked using class inheritance rules (sub-classes inherit inclusions of super-classes)

Parameters:
a - Annotated serializable property (field or getter method)
Returns:
Array of views (represented by classes) that the property is included in; if null, always included (same as returning array containing Object.class)

findGetterAutoDetection

public abstract Boolean findGetterAutoDetection(AnnotatedClass ac)
Method for checking whether there is a class annotation that indicates whether (regular) getter-method auto detection should be enabled. Getter methods are methods with name "getXxx()" (for property "xxx"); "isXxx()" are not included (instead those are considered "is getters")

Returns:
null if no relevant annotation is located; Boolean.TRUE if enabling annotation found, Boolean.FALSE if disabling annotation

findIsGetterAutoDetection

public abstract Boolean findIsGetterAutoDetection(AnnotatedClass ac)
Method for checking whether there is a class annotation that indicates whether (regular) getter-method auto detection should be enabled. Getter methods are methods with name "getXxx()" (for property "xxx"); "isXxx()" are not included (instead those are considered "is getters")

Returns:
null if no relevant annotation is located; Boolean.TRUE if enabling annotation found, Boolean.FALSE if disabling annotation
Since:
1.3

findSerializationPropertyOrder

public abstract String[] findSerializationPropertyOrder(AnnotatedClass ac)
Method for accessing defined property serialization order (which may be partial). May return null if no ordering is defined.

Since:
1.4

findSerializationSortAlphabetically

public abstract Boolean findSerializationSortAlphabetically(AnnotatedClass ac)
Method for checking whether an annotation indicates that serialized properties for which no explicit is defined should be alphabetically (lexicograpically) ordered

Since:
1.4

findGettablePropertyName

public abstract String findGettablePropertyName(AnnotatedMethod am)
Method for checking whether given method has an annotation that suggests property name associated with method that may be a "getter". Should return null if no annotation is found; otherwise a non-null String. If non-null value is returned, it is used as the property name, except for empty String ("") which is taken to mean "use standard bean name detection if applicable; method name if not".


hasAsValueAnnotation

public abstract boolean hasAsValueAnnotation(AnnotatedMethod am)
Method for checking whether given method has an annotation that suggests that the return value of annotated method should be used as "the value" of the object instance; usually serialized as a primitive value such as String or number.

Returns:
True if such annotation is found (and is not disabled); false if no enabled annotation is found

findEnumValue

public abstract String findEnumValue(Enum<?> value)
Method for determining the String value to use for serializing given enumeration entry; used when serializing enumerations as Strings (the standard method).

Returns:
Serialized enum value.

findSerializablePropertyName

public abstract String findSerializablePropertyName(AnnotatedField af)
Method for checking whether given member field represent a serializable logical property; and if so, returns the name of that property. Should return null if no annotation is found (indicating it is not a serializable field); otherwise a non-null String. If non-null value is returned, it is used as the property name, except for empty String ("") which is taken to mean "use the field name as is".


findDeserializer

public abstract Object findDeserializer(Annotated am)
Method for getting a deserializer definition on specified method or field. Type of definition is either instance (of type JsonDeserializer) or Class (of type Class); if value of different type is returned, a runtime exception may be thrown by caller.


findKeyDeserializer

public abstract Class<? extends KeyDeserializer> findKeyDeserializer(Annotated am)
Method for getting a deserializer definition for keys of associated Map property. Type of definition is either instance (of type JsonDeserializer) or Class (of type Class); if value of different type is returned, a runtime exception may be thrown by caller.

Since:
1.3

findContentDeserializer

public abstract Class<? extends JsonDeserializer<?>> findContentDeserializer(Annotated am)
Method for getting a deserializer definition for content (values) of associated Collection, array or Map property. Type of definition is either instance (of type JsonDeserializer) or Class (of type Class); if value of different type is returned, a runtime exception may be thrown by caller.

Since:
1.3

findDeserializationType

public abstract Class<?> findDeserializationType(Annotated am)
Method for accessing annotated type definition that a method can have, to be used as the type for serialization instead of the runtime type. Type must be a narrowing conversion (i.e.subtype of declared type). Declared return type of the method is also considered acceptable.

Returns:
Class to use for deserialization instead of declared type

findDeserializationKeyType

public abstract Class<?> findDeserializationKeyType(Annotated am)
Method for accessing additional narrowing type definition that a method can have, to define more specific key type to use. It should be only be used with Map types.

Returns:
Class specifying more specific type to use instead of declared type, if annotation found; null if not

findDeserializationContentType

public abstract Class<?> findDeserializationContentType(Annotated am)
Method for accessing additional narrowing type definition that a method can have, to define more specific content type to use; content refers to Map values and Collection/array elements. It should be only be used with Map, Collection and array types.

Returns:
Class specifying more specific type to use instead of declared type, if annotation found; null if not

findCreatorAutoDetection

public abstract Boolean findCreatorAutoDetection(AnnotatedClass ac)
Method for checking whether there is a class annotation that indicates whether creator-method auto detection should be enabled.

Returns:
null if no relevant annotation is located; Boolean.TRUE if enabling annotation found, Boolean.FALSE if disabling annotation

findSetterAutoDetection

public abstract Boolean findSetterAutoDetection(AnnotatedClass ac)
Method for checking whether there is a class annotation that indicates whether setter-method auto detection should be enabled.

Returns:
null if no relevant annotation is located; Boolean.TRUE if enabling annotation found, Boolean.FALSE if disabling annotation

findSettablePropertyName

public abstract String findSettablePropertyName(AnnotatedMethod am)
Method for checking whether given method has an annotation that suggests property name associated with method that may be a "setter". Should return null if no annotation is found; otherwise a non-null String. If non-null value is returned, it is used as the property name, except for empty String ("") which is taken to mean "use standard bean name detection if applicable; method name if not".


hasAnySetterAnnotation

public abstract boolean hasAnySetterAnnotation(AnnotatedMethod am)
Method for checking whether given method has an annotation that suggests that the method is to serve as "any setter"; method to be used for setting values of any properties for which no dedicated setter method is found.

Returns:
True if such annotation is found (and is not disabled), false otherwise

hasCreatorAnnotation

public abstract boolean hasCreatorAnnotation(Annotated a)
Method for checking whether given annotated item (method, constructor) has an annotation that suggests that the method is a "creator" (aka factory) method to be used for construct new instances of deserialized values.

Returns:
True if such annotation is found (and is not disabled), false otherwise

findDeserializablePropertyName

public abstract String findDeserializablePropertyName(AnnotatedField af)
Method for checking whether given member field represent a deserializable logical property; and if so, returns the name of that property. Should return null if no annotation is found (indicating it is not a deserializable field); otherwise a non-null String. If non-null value is returned, it is used as the property name, except for empty String ("") which is taken to mean "use the field name as is".


findPropertyNameForParam

public abstract String findPropertyNameForParam(AnnotatedParameter param)
Method for checking whether given set of annotations indicates property name for associated parameter. No actual parameter object can be passed since JDK offers no representation; just annotations.