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BaseNode (Drools 4.0.0.11754MR2 API) - JBoss RULES 4.0.0.11754MR2 API 英文版文档

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org.drools.common
Class BaseNode

java.lang.Object
  org.drools.common.BaseNode

All Implemented Interfaces:

Serializable, NetworkNode

Direct Known Subclasses:

ObjectSource, QueryTerminalNode, RuleTerminalNode, TupleSource

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public abstract class BaseNode
extends Object
implements NetworkNode

The base class for all Rete nodes.

Author:

Mark Proctor, Bob McWhirter

See Also:

Serialized Form

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Field Summary
protected  boolean	hasMemory
protected  int	id
protected  int	sharedCount

 

Constructor Summary
BaseNode(int id)           All nodes have a unique id, set in the constructor.

 

Method Summary
void	addShare()           Each time a node is shared a counter is increased.
abstract  void	attach()           Attaches the node into the network.
abstract  void	attach(InternalWorkingMemory[] workingMemories)
int	getId()           Returns the unique id that represents the node in the Rete network
int	getSharedCount()           Returns the number of times the node is shared
int	hashCode()           The hashCode return is simply the unique id of the node.
boolean	hasMemory()           Indicates whether the node has any memory.
boolean	isInUse()           Returns true in case the current node is in use (is referenced by any other node)
boolean	isShared()           Indicates whether the node is shared.
abstract  void	remove(BaseNode node, InternalWorkingMemory[] workingMemories)           Removes the node from teh network.
void	removeShare()           Each time a node is unshared a counter is decreased.
protected  void	setHasMemory(boolean hasMemory)           Specifies with the node has any memory.
String	toString()

 

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

 

Field Detail

id

protected final int id

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hasMemory

protected boolean hasMemory

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sharedCount

protected int sharedCount

Constructor Detail

BaseNode

public BaseNode(int id)

All nodes have a unique id, set in the constructor.

Parameters:

id - The unique id

Method Detail

getId

public int getId()

Description copied from interface: NetworkNode

Returns the unique id that represents the node in the Rete network

Specified by:

getId in interface NetworkNode

Returns:

unique int value

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setHasMemory

protected void setHasMemory(boolean hasMemory)

Specifies with the node has any memory.

Parameters:

hasMemory -

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hasMemory

public boolean hasMemory()

Indicates whether the node has any memory.

Returns:

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attach

public abstract void attach()

Attaches the node into the network. Usually to the parent ObjectSource or TupleSource

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attach

public abstract void attach(InternalWorkingMemory[] workingMemories)

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remove

public abstract void remove(BaseNode node,
                            InternalWorkingMemory[] workingMemories)

Removes the node from teh network. Usually from the parent ObjectSource or TupleSource

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addShare

public void addShare()

Each time a node is shared a counter is increased.

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removeShare

public void removeShare()

Each time a node is unshared a counter is decreased.

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isShared

public boolean isShared()

Indicates whether the node is shared.

Returns:

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isInUse

public boolean isInUse()

Returns true in case the current node is in use (is referenced by any other node)

Returns:

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getSharedCount

public int getSharedCount()

Returns the number of times the node is shared

Returns:

int value indicating the share count.

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hashCode

public int hashCode()

The hashCode return is simply the unique id of the node. It is expected that base classes will also implement equals(Object object).

Overrides:

hashCode in class Object

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toString

public String toString()

Overrides:

toString in class Object

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