org.drools.mvel.expr

Class MVELAccumulator

java.lang.Object

org.drools.mvel.expr.MVELAccumulator

All Implemented Interfaces:

Externalizable, Serializable, org.drools.core.spi.Accumulator, org.drools.core.spi.Invoker, org.drools.core.spi.MvelAccumulator, org.drools.core.spi.RuleComponent, MVELCompileable

public class MVELAccumulator
extends Object
implements MVELCompileable, org.drools.core.spi.MvelAccumulator, Externalizable

An MVEL accumulator implementation

See Also:

Serialized Form

Nested Class Summary

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

org.drools.core.spi.Accumulator.SafeAccumulator

Constructor Summary

Constructors

Constructor and Description
MVELAccumulator()
MVELAccumulator(MVELCompilationUnit initUnit, MVELCompilationUnit actionUnit, MVELCompilationUnit reverseUnit, MVELCompilationUnit resultUnit)

Method Summary

Modifier and Type	Method and Description
Object	accumulate(Object workingMemoryContext, Object context, org.drools.core.spi.Tuple tuple, org.drools.core.common.InternalFactHandle handle, org.drools.core.rule.Declaration[] declarations, org.drools.core.rule.Declaration[] innerDeclarations, org.drools.core.WorkingMemory workingMemory)
void	compile(MVELDialectRuntimeData runtimeData)
void	compile(MVELDialectRuntimeData runtimeData, org.drools.core.definitions.rule.impl.RuleImpl rule)
Serializable	createContext()
Object	createWorkingMemoryContext()
org.drools.core.rule.Declaration[]	getRequiredDeclarations()
Object	getResult(Object workingMemoryContext, Object context, org.drools.core.spi.Tuple tuple, org.drools.core.rule.Declaration[] declarations, org.drools.core.WorkingMemory workingMemory)
void	init(Object workingMemoryContext, Object context, org.drools.core.spi.Tuple tuple, org.drools.core.rule.Declaration[] declarations, org.drools.core.WorkingMemory workingMemory)
void	readExternal(ObjectInput in)
boolean	supportsReverse()
boolean	tryReverse(Object workingMemoryContext, Object context, org.drools.core.spi.Tuple leftTuple, org.drools.core.common.InternalFactHandle handle, Object value, org.drools.core.rule.Declaration[] declarations, org.drools.core.rule.Declaration[] innerDeclarations, org.drools.core.WorkingMemory workingMemory)
void	writeExternal(ObjectOutput out)

Methods inherited from class java.lang.Object

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

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

replaceDeclaration

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

isCompiledInvoker

Constructor Detail

MVELAccumulator

public MVELAccumulator()

MVELAccumulator

public MVELAccumulator(MVELCompilationUnit initUnit,
                       MVELCompilationUnit actionUnit,
                       MVELCompilationUnit reverseUnit,
                       MVELCompilationUnit resultUnit)

Method Detail

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

compile

public void compile(MVELDialectRuntimeData runtimeData)

Specified by:

compile in interface MVELCompileable

compile

public void compile(MVELDialectRuntimeData runtimeData,
                    org.drools.core.definitions.rule.impl.RuleImpl rule)

Specified by:

compile in interface MVELCompileable

createContext

public Serializable createContext()

Specified by:

createContext in interface org.drools.core.spi.Accumulator

init

public void init(Object workingMemoryContext,
                 Object context,
                 org.drools.core.spi.Tuple tuple,
                 org.drools.core.rule.Declaration[] declarations,
                 org.drools.core.WorkingMemory workingMemory)
          throws Exception

Specified by:

init in interface org.drools.core.spi.Accumulator

Throws:

Exception

accumulate

public Object accumulate(Object workingMemoryContext,
                         Object context,
                         org.drools.core.spi.Tuple tuple,
                         org.drools.core.common.InternalFactHandle handle,
                         org.drools.core.rule.Declaration[] declarations,
                         org.drools.core.rule.Declaration[] innerDeclarations,
                         org.drools.core.WorkingMemory workingMemory)
                  throws Exception

Specified by:

accumulate in interface org.drools.core.spi.Accumulator

Throws:

Exception

tryReverse

public boolean tryReverse(Object workingMemoryContext,
                          Object context,
                          org.drools.core.spi.Tuple leftTuple,
                          org.drools.core.common.InternalFactHandle handle,
                          Object value,
                          org.drools.core.rule.Declaration[] declarations,
                          org.drools.core.rule.Declaration[] innerDeclarations,
                          org.drools.core.WorkingMemory workingMemory)
                   throws Exception

Specified by:

tryReverse in interface org.drools.core.spi.Accumulator

Throws:

Exception

getResult

public Object getResult(Object workingMemoryContext,
                        Object context,
                        org.drools.core.spi.Tuple tuple,
                        org.drools.core.rule.Declaration[] declarations,
                        org.drools.core.WorkingMemory workingMemory)
                 throws Exception

Specified by:

getResult in interface org.drools.core.spi.Accumulator

Throws:

Exception

supportsReverse

public boolean supportsReverse()

Specified by:

supportsReverse in interface org.drools.core.spi.Accumulator

createWorkingMemoryContext

public Object createWorkingMemoryContext()

Specified by:

createWorkingMemoryContext in interface org.drools.core.spi.Accumulator

getRequiredDeclarations

public org.drools.core.rule.Declaration[] getRequiredDeclarations()

Specified by:

getRequiredDeclarations in interface org.drools.core.spi.MvelAccumulator