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AbstractCachingLabeledEnumResolver (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.core.enums
Class AbstractCachingLabeledEnumResolver

java.lang.Object
  org.springframework.core.enums.AbstractCachingLabeledEnumResolver

All Implemented Interfaces:

LabeledEnumResolver

Direct Known Subclasses:

StaticLabeledEnumResolver

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public abstract class AbstractCachingLabeledEnumResolver
extends Object
implements LabeledEnumResolver

Abstract base class for LabeledEnumResolver implementations, caching all retrieved LabeledEnum instances.

Subclasses need to implement the template method findLabeledEnums(type).

Since:

1.2.2

Author:

Keith Donald, Juergen Hoeller

See Also:

findLabeledEnums(Class)

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Field Summary
protected  Log	logger

 

Constructor Summary
AbstractCachingLabeledEnumResolver()

 

Method Summary
protected abstract  Set	findLabeledEnums(Class type)           Template method to be implemented by subclasses.
LabeledEnum	getLabeledEnumByCode(Class type, Comparable code)           Resolve a single LabeledEnum by its identifying code.
LabeledEnum	getLabeledEnumByLabel(Class type, String label)           Resolve a single LabeledEnum by its identifying code.
Map	getLabeledEnumMap(Class type)           Return a map of enumerations of a particular type.
Set	getLabeledEnumSet(Class type)           Return a set of enumerations of a particular type.

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Field Detail

logger

protected final transient Log logger

Constructor Detail

AbstractCachingLabeledEnumResolver

public AbstractCachingLabeledEnumResolver()

Method Detail

getLabeledEnumSet

public Set getLabeledEnumSet(Class type)
                      throws IllegalArgumentException

Description copied from interface: LabeledEnumResolver

Return a set of enumerations of a particular type. Each element in the set should be an instance of LabeledEnum.

Specified by:

getLabeledEnumSet in interface LabeledEnumResolver

Parameters:

type - the enum type

Returns:

a set of localized enumeration instances for the provided type

Throws:

IllegalArgumentException - if the type is not supported

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getLabeledEnumMap

public Map getLabeledEnumMap(Class type)
                      throws IllegalArgumentException

Description copied from interface: LabeledEnumResolver

Return a map of enumerations of a particular type. Each element in the map should be a key/value pair, where the key is the enum code, and the value is the LabeledEnum instance.

Specified by:

getLabeledEnumMap in interface LabeledEnumResolver

Parameters:

type - the enum type

Returns:

a Map of localized enumeration instances, with enum code as key and LabeledEnum instance as value

Throws:

IllegalArgumentException - if the type is not supported

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getLabeledEnumByCode

public LabeledEnum getLabeledEnumByCode(Class type,
                                        Comparable code)
                                 throws IllegalArgumentException

Description copied from interface: LabeledEnumResolver

Resolve a single LabeledEnum by its identifying code.

Specified by:

getLabeledEnumByCode in interface LabeledEnumResolver

Parameters:

type - the enum type

code - the enum code

Returns:

the enum

Throws:

IllegalArgumentException - if the code did not map to a valid instance

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getLabeledEnumByLabel

public LabeledEnum getLabeledEnumByLabel(Class type,
                                         String label)
                                  throws IllegalArgumentException

Description copied from interface: LabeledEnumResolver

Resolve a single LabeledEnum by its identifying code.

Specified by:

getLabeledEnumByLabel in interface LabeledEnumResolver

Parameters:

type - the enum type

label - the enum label

Returns:

the enum

Throws:

IllegalArgumentException - if the label did not map to a valid instance

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findLabeledEnums

protected abstract Set findLabeledEnums(Class type)

Template method to be implemented by subclasses. Supposed to find all LabeledEnum instances for the given type.

Parameters:

type - the enum type

Returns:

the Set of LabeledEnum instances

See Also:

LabeledEnum

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