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Java Source Code / Java Documentation » Rule Engine » Mandarax » org.mandarax.kernel

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Class Diagram

Java Document (Java Doc)

org.mandarax.kernel .DerivationNode

All known Subclasses:   org.mandarax.reference .DerivationNodeImpl,
DerivationNode
public interface DerivationNode extends Serializable(Code)
Derivation nodes represent the application of a single clause (usually a rule) in a derivation.
author:
   Jens Dietrich
version:
   3.4 <7 March 05>
since:
   1.0

Field Summary
final public static byte FAILED

final public static byte IRRELEVANT

final public static byte SUCCESS

final public static byte UNKNOWN


Method Summary
public Clause getAppliedClause()
     Get the applied clause.
public Clause getQuery()
     Get the query (= goal).
int getState()
     Get the state of the derivation node.
java.util.List getSubNodes()
     Returns the sub nodes of this node.
int[] getSupportedResults()
     Get an array of integers containing the indexes of all solutions supported.
public Unification getUnification()
     Get the unification.
public boolean isFailed()
     Indicates whether this derivation step has failed.
boolean isSupported(int resultNumber)
     Indicates whether the result at the given index is supported by this node.

Field Detail
FAILED
final public static byte FAILED(Code)

IRRELEVANT
final public static byte IRRELEVANT(Code)

SUCCESS
final public static byte SUCCESS(Code)

UNKNOWN
final public static byte UNKNOWN(Code)

Method Detail
getAppliedClause
public Clause getAppliedClause()(Code)
Get the applied clause. the applied clause

getQuery
public Clause getQuery()(Code)
Get the query (= goal). the query

getState
int getState()(Code)
Get the state of the derivation node. I.e., basically whether this derivation step has failed or not. Possible states are defined in this interface by static variables. There is also a state indicating that a derivation node is irrelevant, e.g. if a node is in a proof tree containing derivations for many solutions but the structure is only considered in the context of one special solution. Then a node successful w.r.t. one solutions might be irrelevant w.r.t. another solution. the state of this node
See Also:   DerivationNode.FAILED
See Also:   DerivationNode.IRRELEVANT
See Also:   DerivationNode.SUCCESS
See Also:   DerivationNode.UNKNOWN

getSubNodes
java.util.List getSubNodes()(Code)
Returns the sub nodes of this node. the list of children (sub nodes)

getSupportedResults
int[] getSupportedResults()(Code)
Get an array of integers containing the indexes of all solutions supported. an array of integer

getUnification
public Unification getUnification()(Code)
Get the unification. the unification performed

isFailed
public boolean isFailed()(Code)
Indicates whether this derivation step has failed. true if this proof step has failed, false otherwise

isSupported
boolean isSupported(int resultNumber)(Code)
Indicates whether the result at the given index is supported by this node. int resultNumber - the number of the result in the result set indexing starts with 0 boolean

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