com.massa.mrules.accessor

Class MFilterAccessor

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.MSearchAccessor

com.massa.mrules.accessor.MFilterAccessor

All Implemented Interfaces:

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

public class MFilterAccessor
extends MSearchAccessor

Allows to search a Collection for an Object validating a specific condition. Returns the first instance found.
This Accessor allows no casts, as searched object are in general complex beans, and not convertible types.
If nothing is found, returns null.

Since:

1.10.0

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	FILTER_ID

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

SEARCH_ID

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

internalExpectedGenericType, internalExpectedType, source

Constructor Summary

Constructors

Constructor and Description
MFilterAccessor()
MFilterAccessor(IReadAccessor source, ICondition condition)

Method Summary

Modifier and Type	Method and Description
MFilterAccessor	clone() Clones the Addon.
void	compileValue(ICompilationContext ctxt, Class<?> expectedType) Implementation to handle case when expected result is a single value.
String	getImplementationId() Unique addon implementation ID.
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.MSearchAccessor

check, check, commonCompile, compileCollection, equals, getCondition, getEstimatedReadCost, hashCode, isCacheUsed, parseCollections, setCondition, toString

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

getGenericCollectionType, getInternalCacheIdentifier, getSource, getType, handleValue, internalGet, isConstantValue, isInternalCacheIdentifierNeeded, isShouldIterate, resetCachedData, setInternalCacheIdentifier, setSource, 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

FILTER_ID

public static final String FILTER_ID

See Also:

Constant Field Values

Constructor Detail

MFilterAccessor

public MFilterAccessor()

MFilterAccessor

public MFilterAccessor(IReadAccessor source,
                       ICondition condition)

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.

Overrides:

compileValue in class MSearchAccessor

Throws:

MRuleValidationException

specificHandleValue

public 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.

Overrides:

specificHandleValue in class MSearchAccessor

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.

Specified by:

getImplementationId in interface IAddon

Overrides:

getImplementationId in class MSearchAccessor

clone

public MFilterAccessor clone()

Description copied from interface: IAddon

Clones the Addon.
The general contract is that the clone of a compiled Addon is still compiled.

Specified by:

clone in interface IAccessor

Specified by:

clone in interface IReadAccessor

Specified by:

clone in interface IAddon

Specified by:

clone in interface IMRulesObject

Overrides:

clone in class MSearchAccessor