org.drools.core.rule.constraint
Class MvelConstraint

java.lang.Object
  org.drools.core.rule.MutableTypeConstraint
      org.drools.core.rule.constraint.MvelConstraint

All Implemented Interfaces:

Externalizable, Serializable, Cloneable, IndexableConstraint, Acceptor, AcceptsReadAccessor, AlphaNodeFieldConstraint, BetaNodeFieldConstraint, Constraint, RuleComponent

public class MvelConstraint
extends MutableTypeConstraint
implements IndexableConstraint, AcceptsReadAccessor

See Also:

Serialized Form

Nested Class Summary

static class	MvelConstraint.MvelContextEntry
static class	MvelConstraint.PlainIndexEvaluator
static class	MvelConstraint.UnificationContextEntry

Nested classes/interfaces inherited from interface org.drools.core.spi.Constraint

Constraint.ConstraintType

Field Summary

protected MVELCompilationUnit	compilationUnit
protected ConditionEvaluator	conditionEvaluator
protected String	expression
static IndexEvaluator	INDEX_EVALUATOR
protected AtomicInteger	invocationCounter
protected boolean	isDynamic
protected static int	JIT_THRESOLD
protected boolean	jitted
protected static boolean	TEST_JITTING

Constructor Summary

MvelConstraint()

MvelConstraint(String packageName, String expression, Declaration[] declarations, MVELCompilationUnit compilationUnit, boolean isDynamic)

MvelConstraint(String packageName, String expression, Declaration[] declarations, MVELCompilationUnit compilationUnit, IndexUtil.ConstraintType constraintType, Declaration indexingDeclaration, InternalReadAccessor extractor, boolean isUnification)

MvelConstraint(String packageName, String expression, MVELCompilationUnit compilationUnit, IndexUtil.ConstraintType constraintType, FieldValue fieldValue, InternalReadAccessor extractor)

Method Summary

MvelConstraint	clone() Clones the constraint
MvelConstraint	cloneIfInUse() Clone this constraints only if it is already used by a different node, otherwise returns this
ContextEntry	createContextEntry()
protected void	createMvelConditionEvaluator(InternalWorkingMemory workingMemory)
boolean	equals(Object object)
protected boolean	evaluate(InternalFactHandle handle, InternalWorkingMemory workingMemory, LeftTuple leftTuple)
protected boolean	forceJitEvaluator(InternalFactHandle handle, InternalWorkingMemory workingMemory, LeftTuple leftTuple)
protected String	getAccessedClass()
IndexUtil.ConstraintType	getConstraintType()
String	getExpression()
FieldValue	getField()
InternalReadAccessor	getFieldExtractor()
AbstractHashTable.FieldIndex	getFieldIndex()
Declaration	getIndexingDeclaration()
long	getListenedPropertyMask(List<String> settableProperties)
protected MVELDialectRuntimeData	getMVELDialectRuntimeData(InternalWorkingMemory workingMemory)
String	getPackageName()
protected org.mvel2.ParserConfiguration	getParserConfiguration(InternalWorkingMemory workingMemory)
Declaration[]	getRequiredDeclarations() Returns all the declarations required by the given constraint implementation.
int	hashCode()
boolean	isAllowed(InternalFactHandle handle, InternalWorkingMemory workingMemory, ContextEntry context)
boolean	isAllowedCachedLeft(ContextEntry context, InternalFactHandle handle)
boolean	isAllowedCachedRight(LeftTuple tuple, ContextEntry context)
boolean	isDynamic()
boolean	isIndexable(short nodeType)
boolean	isTemporal() Returns true in case this constraint is a temporal constraint
boolean	isUnification()
protected void	jitEvaluator(InternalFactHandle handle, InternalWorkingMemory workingMemory, LeftTuple leftTuple)
void	readExternal(ObjectInput in)
void	replaceDeclaration(Declaration oldDecl, Declaration newDecl) When a rule contains multiple logical branches, i.e., makes use of 'OR' CE, it is required to clone patterns and declarations for each logical branch.
void	setReadAccessor(InternalReadAccessor readAccessor)
String	toString()
void	unsetUnification()
void	writeExternal(ObjectOutput out)

Methods inherited from class org.drools.core.rule.MutableTypeConstraint

getType, setInUse, setType

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.drools.core.spi.Constraint

getType

Field Detail

TEST_JITTING

protected static final boolean TEST_JITTING

See Also:

Constant Field Values

JIT_THRESOLD

protected static final int JIT_THRESOLD

See Also:

Constant Field Values

invocationCounter

protected final transient AtomicInteger invocationCounter

jitted

protected transient boolean jitted

expression

protected String expression

isDynamic

protected boolean isDynamic

compilationUnit

protected MVELCompilationUnit compilationUnit

conditionEvaluator

protected transient volatile ConditionEvaluator conditionEvaluator

INDEX_EVALUATOR

public static final IndexEvaluator INDEX_EVALUATOR

Constructor Detail

MvelConstraint

public MvelConstraint()

MvelConstraint

public MvelConstraint(String packageName,
                      String expression,
                      MVELCompilationUnit compilationUnit,
                      IndexUtil.ConstraintType constraintType,
                      FieldValue fieldValue,
                      InternalReadAccessor extractor)

MvelConstraint

public MvelConstraint(String packageName,
                      String expression,
                      Declaration[] declarations,
                      MVELCompilationUnit compilationUnit,
                      boolean isDynamic)

MvelConstraint

public MvelConstraint(String packageName,
                      String expression,
                      Declaration[] declarations,
                      MVELCompilationUnit compilationUnit,
                      IndexUtil.ConstraintType constraintType,
                      Declaration indexingDeclaration,
                      InternalReadAccessor extractor,
                      boolean isUnification)

Method Detail

getAccessedClass

protected String getAccessedClass()

setReadAccessor

public void setReadAccessor(InternalReadAccessor readAccessor)

Specified by:

setReadAccessor in interface AcceptsReadAccessor

getPackageName

public String getPackageName()

getExpression

public String getExpression()

isDynamic

public boolean isDynamic()

isUnification

public boolean isUnification()

Specified by:

isUnification in interface IndexableConstraint

unsetUnification

public void unsetUnification()

isIndexable

public boolean isIndexable(short nodeType)

Specified by:

isIndexable in interface IndexableConstraint

getConstraintType

public IndexUtil.ConstraintType getConstraintType()

Specified by:

getConstraintType in interface IndexableConstraint

getField

public FieldValue getField()

Specified by:

getField in interface IndexableConstraint

isAllowed

public boolean isAllowed(InternalFactHandle handle,
                         InternalWorkingMemory workingMemory,
                         ContextEntry context)

Specified by:

isAllowed in interface AlphaNodeFieldConstraint

isAllowedCachedLeft

public boolean isAllowedCachedLeft(ContextEntry context,
                                   InternalFactHandle handle)

Specified by:

isAllowedCachedLeft in interface BetaNodeFieldConstraint

isAllowedCachedRight

public boolean isAllowedCachedRight(LeftTuple tuple,
                                    ContextEntry context)

Specified by:

isAllowedCachedRight in interface BetaNodeFieldConstraint

evaluate

protected boolean evaluate(InternalFactHandle handle,
                           InternalWorkingMemory workingMemory,
                           LeftTuple leftTuple)

createMvelConditionEvaluator

protected void createMvelConditionEvaluator(InternalWorkingMemory workingMemory)

forceJitEvaluator

protected boolean forceJitEvaluator(InternalFactHandle handle,
                                    InternalWorkingMemory workingMemory,
                                    LeftTuple leftTuple)

jitEvaluator

protected void jitEvaluator(InternalFactHandle handle,
                            InternalWorkingMemory workingMemory,
                            LeftTuple leftTuple)

createContextEntry

public ContextEntry createContextEntry()

Specified by:

createContextEntry in interface AlphaNodeFieldConstraint

Specified by:

createContextEntry in interface BetaNodeFieldConstraint

getFieldIndex

public AbstractHashTable.FieldIndex getFieldIndex()

Specified by:

getFieldIndex in interface IndexableConstraint

getFieldExtractor

public InternalReadAccessor getFieldExtractor()

Specified by:

getFieldExtractor in interface IndexableConstraint

getRequiredDeclarations

public Declaration[] getRequiredDeclarations()

Description copied from interface: Constraint

Returns all the declarations required by the given constraint implementation.

Specified by:

getRequiredDeclarations in interface Constraint

Returns:

getIndexingDeclaration

public Declaration getIndexingDeclaration()

replaceDeclaration

public void replaceDeclaration(Declaration oldDecl,
                               Declaration newDecl)

Description copied from interface: Constraint

When a rule contains multiple logical branches, i.e., makes use of 'OR' CE, it is required to clone patterns and declarations for each logical branch. Since this is done at ReteOO build type, when constraints were already created, eventually some constraints need to update their references to the declarations.

Specified by:

replaceDeclaration in interface Constraint

getListenedPropertyMask

public long getListenedPropertyMask(List<String> settableProperties)

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Overrides:

writeExternal in class MutableTypeConstraint

Throws:

IOException

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Overrides:

readExternal in class MutableTypeConstraint

Throws:

IOException

ClassNotFoundException

isTemporal

public boolean isTemporal()

Description copied from interface: Constraint

Returns true in case this constraint is a temporal constraint

Specified by:

isTemporal in interface Constraint

Returns:

cloneIfInUse

public MvelConstraint cloneIfInUse()

Description copied from interface: AlphaNodeFieldConstraint

Clone this constraints only if it is already used by a different node, otherwise returns this

Specified by:

cloneIfInUse in interface AlphaNodeFieldConstraint

Specified by:

cloneIfInUse in interface BetaNodeFieldConstraint

Overrides:

cloneIfInUse in class MutableTypeConstraint

clone

public MvelConstraint clone()

Description copied from interface: Constraint

Clones the constraint

Specified by:

clone in interface Constraint

Specified by:

clone in class MutableTypeConstraint

Returns:

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object object)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

getParserConfiguration

protected org.mvel2.ParserConfiguration getParserConfiguration(InternalWorkingMemory workingMemory)

getMVELDialectRuntimeData

protected MVELDialectRuntimeData getMVELDialectRuntimeData(InternalWorkingMemory workingMemory)