com.massa.mrules.accessor

Class MSizeAccessor

java.lang.Object

com.massa.mrules.base.AbstractMRulesObject

com.massa.mrules.addon.AbstractAddon

com.massa.mrules.accessor.AbstractReadAccessor

com.massa.mrules.accessor.AbstractReadSourceAccessor

com.massa.mrules.accessor.MSizeAccessor

All Implemented Interfaces:

IAccessor, IAccessorValueHandler, IReadAccessor, IAddon, IMRulesObject, Outable, Serializable, Cloneable

public class MSizeAccessor
extends AbstractReadSourceAccessor

Allows to compute a value size. Value might be a CharSequence (String, StringBuilder, ...), an Array, a Collection, or any object exposing a zero-argument and int-return type "size" or "length" method. No error will be thrown in any case: as a fallback, null will be returned. A null value is considered as a "null" length.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface com.massa.mrules.accessor.IReadAccessor

IReadAccessor.Standalone

Field Summary

Fields

Modifier and Type	Field and Description
static String	SIZE_ID

Fields inherited from class com.massa.mrules.accessor.AbstractReadSourceAccessor

internalExpectedGenericType, internalExpectedType, source

Constructor Summary

Constructors

Constructor and Description
MSizeAccessor()
MSizeAccessor(IReadAccessor source)

Method Summary

Modifier and Type	Method and Description
<G,C extends Collection<G>> void	compileCollection(ICompilationContext ctxt, Class<C> expectedType, Class<G> expectedGenericType) Implementation to handle case when expected result is a Collection.
void	compileValue(ICompilationContext ctxt, Class<?> expectedType) Implementation to handle case when expected result is a single value.
Class<?>	getGenericCollectionType(IContext ctxt) Returns requested generic type if any, otherwise the source's generic type if any.
String	getImplementationId() Unique addon implementation ID.
Class<?>	getType(IContext ctxt) Returns requested type if any, otherwise the source's type if any.
protected boolean	parseCollections() Always false.
protected Object	specificHandleValue(IExecutionContext ctxt, Object value) Override this to apply specific transformation on value read from source accessor.

Methods inherited from class com.massa.mrules.accessor.AbstractReadSourceAccessor

clone, equals, getEstimatedReadCost, getInternalCacheIdentifier, getSource, handleValue, hashCode, internalGet, isCacheUsed, isConstantValue, isInternalCacheIdentifierNeeded, isShouldIterate, resetCachedData, setInternalCacheIdentifier, setSource, toString, wasRegistered

Methods inherited from class com.massa.mrules.accessor.AbstractReadAccessor

castToExpected, compileRead, compileRead, compileRead, compileRead, get, getGenericTypes, isShouldBeWrappedToConstantValue, isShouldNotCache

Methods inherited from class com.massa.mrules.addon.AbstractAddon

optimize, toString

Methods inherited from class com.massa.mrules.base.AbstractMRulesObject

getDebugInfo, getDescription, getName, setDebugInfo, setDescription, setName

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.massa.mrules.addon.IAddon

optimize

Methods inherited from interface com.massa.mrules.base.IMRulesObject

getDebugInfo, getDescription, getName, setDebugInfo, setDescription, setName

Field Detail

SIZE_ID

public static final String SIZE_ID

See Also:

Constant Field Values

Constructor Detail

MSizeAccessor

public MSizeAccessor()

MSizeAccessor

public MSizeAccessor(IReadAccessor source)

Method Detail

compileValue

public void compileValue(ICompilationContext ctxt,
                         Class<?> expectedType)
                  throws MRuleValidationException

Description copied from class: AbstractReadAccessor

Implementation to handle case when expected result is a single value.

Specified by:

compileValue in class AbstractReadAccessor

Throws:

MRuleValidationException

compileCollection

public <G,C extends Collection<G>> void compileCollection(ICompilationContext ctxt,
                                                          Class<C> expectedType,
                                                          Class<G> expectedGenericType)
                                                   throws MRuleValidationException

Description copied from class: AbstractReadAccessor

Implementation to handle case when expected result is a Collection.

Specified by:

compileCollection in class AbstractReadAccessor

Throws:

MRuleValidationException

parseCollections

protected boolean parseCollections()

Always false.

Specified by:

parseCollections in class AbstractReadSourceAccessor

specificHandleValue

protected Object specificHandleValue(IExecutionContext ctxt,
                                     Object value)
                              throws MAccessorException

Description copied from class: AbstractReadSourceAccessor

Override this to apply specific transformation on value read from source accessor.

Specified by:

specificHandleValue in class AbstractReadSourceAccessor

Throws:

MAccessorException

getType

public Class<?> getType(IContext ctxt)
                 throws MAccessorException

Description copied from class: AbstractReadSourceAccessor

Returns requested type if any, otherwise the source's type if any.

Specified by:

getType in interface IAccessor

Overrides:

getType in class AbstractReadSourceAccessor

Throws:

MAccessorException

getGenericCollectionType

public Class<?> getGenericCollectionType(IContext ctxt)
                                  throws MAccessorException

Description copied from class: AbstractReadSourceAccessor

Returns requested generic type if any, otherwise the source's generic type if any.

Specified by:

getGenericCollectionType in interface IAccessor

Overrides:

getGenericCollectionType in class AbstractReadSourceAccessor

Throws:

MAccessorException

getImplementationId

public String getImplementationId()

Description copied from interface: IAddon

Unique addon implementation ID. In case of conflict, an Class Initialization error will be raised.