Package com.google.api.client.util

Class FieldInfo

java.lang.Object

com.google.api.client.util.FieldInfo

public class FieldInfo
extends Object

Parses field information to determine data key name/value pair associated with the field.

Implementation is thread-safe.

Since:

1.0

Field Summary

Fields

Modifier and Type	Field	Description
private static final Map<Field,FieldInfo>	CACHE	Cached field information.
private final Field	field	Field.
private final boolean	isPrimitive	Whether the field class is "primitive" as defined by Data.isPrimitive(Type).
private final String	name	Data key name associated with the field for a non-enum-constant with a Key annotation, or data key value associated with the enum constant with a Value annotation or null for an enum constant with a NullValue annotation.

Constructor Summary

Constructors

Constructor	Description
FieldInfo(Field field, String name)

Method Summary

Modifier and Type	Method	Description
<T extends Enum<T>> T	enumValue()
ClassInfo	getClassInfo()	Returns the class information of the field's declaring class.
Field	getField()	Returns the field.
static Object	getFieldValue(Field field, Object obj)	Returns the value of the given field in the given object instance using reflection.
Type	getGenericType()	Returns the field's generic type, which is a class, parameterized type, generic array type, or type variable, but not a wildcard type.
String	getName()	Returns the data key name associated with the field for a non-enum-constant with a Key annotation, or data key value associated with the enum constant with a Value annotation or null for an enum constant with a NullValue annotation.
Class<?>	getType()	Returns the field's type.
Object	getValue(Object obj)	Returns the value of the field in the given object instance using reflection.
boolean	isFinal()	Returns whether the field is final.
boolean	isPrimitive()	Returns whether the field is primitive as defined by Data.isPrimitive(Type).
static FieldInfo	of(Enum<?> enumValue)	Returns the field information for the given enum value.
static FieldInfo	of(Field field)	Returns the field information for the given field.
static void	setFieldValue(Field field, Object obj, Object value)	Sets to the given value of the given field in the given object instance using reflection.
void	setValue(Object obj, Object value)	Sets to the given value of the field in the given object instance using reflection.

Methods inherited from class java.lang.Object

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

Field Details

CACHE

private static final Map<Field,FieldInfo> CACHE

Cached field information.

isPrimitive

private final boolean isPrimitive

Whether the field class is "primitive" as defined by Data.isPrimitive(Type).

field

private final Field field

Field.

name

private final String name

Data key name associated with the field for a non-enum-constant with a Key annotation, or data key value associated with the enum constant with a Value annotation or null for an enum constant with a NullValue annotation.

This string is interned.

Constructor Details

FieldInfo

FieldInfo(Field field,
 String name)

Method Details

of

public static FieldInfo of(Enum<?> enumValue)

Returns the field information for the given enum value.

Parameters:

enumValue - enum value

Returns:

field information

Throws:

IllegalArgumentException - if the enum value has no value annotation

Since:

1.4

of

public static FieldInfo of(Field field)

Returns the field information for the given field.

Parameters:

field - field or null for null result

Returns:

field information or null if the field has no name or for null input

getField

public Field getField()

Returns the field.

Since:

1.4

getName

public String getName()

Returns the data key name associated with the field for a non-enum-constant with a Key annotation, or data key value associated with the enum constant with a Value annotation or null for an enum constant with a NullValue annotation.

This string is interned.

Since:

1.4

getType

public Class<?> getType()

Returns the field's type.

Since:

1.4

getGenericType

public Type getGenericType()

Returns the field's generic type, which is a class, parameterized type, generic array type, or type variable, but not a wildcard type.

Since:

1.4

isFinal

public boolean isFinal()

Returns whether the field is final.

Since:

1.4

isPrimitive

public boolean isPrimitive()

Returns whether the field is primitive as defined by Data.isPrimitive(Type).

Since:

1.4

getValue

public Object getValue(Object obj)

Returns the value of the field in the given object instance using reflection.

setValue

public void setValue(Object obj,
 Object value)

Sets to the given value of the field in the given object instance using reflection.

If the field is final, it checks that value being set is identical to the existing value.

getClassInfo

public ClassInfo getClassInfo()

Returns the class information of the field's declaring class.

enumValue

public <T extends Enum<T>> T enumValue()

getFieldValue

public static Object getFieldValue(Field field,
 Object obj)

Returns the value of the given field in the given object instance using reflection.

setFieldValue

public static void setFieldValue(Field field,
 Object obj,
 Object value)

Sets to the given value of the given field in the given object instance using reflection.

If the field is final, it checks that value being set is identical to the existing value.