Class GBDTNode
java.lang.Object
com.yahoo.searchlib.rankingexpression.rule.ExpressionNode
com.yahoo.searchlib.rankingexpression.evaluation.gbdtoptimization.GBDTNode
- All Implemented Interfaces:
Serializable
An optimized version of a decision tree.
- Author:
- bratseth
- See Also:
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Field Summary
Modifier and TypeFieldDescriptionstatic final int
The max (absolute) supported value an optimized leaf may havestatic final int
The max number of variables (features) supported in the context -
Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionstatic double
final Value
Returns the value of evaluating this expression over the given context.int
hashCode()
Returns a hashcode computed from the data in thistoString
(StringBuilder string, SerializationContext context, Deque<String> path, CompositeNode parent) Returns "(optimized condition tree)"final com.yahoo.tensor.TensorType
Returns the type this will return if evaluated with the given context.final double[]
values()
Returns a direct reference to the values of this.Methods inherited from class com.yahoo.searchlib.rankingexpression.rule.ExpressionNode
equals, toString, toString
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Field Details
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MAX_LEAF_VALUE
public static final int MAX_LEAF_VALUEThe max (absolute) supported value an optimized leaf may have- See Also:
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MAX_VARIABLES
public static final int MAX_VARIABLESThe max number of variables (features) supported in the context- See Also:
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Constructor Details
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GBDTNode
public GBDTNode(double[] values)
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Method Details
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values
public final double[] values()Returns a direct reference to the values of this. The returned array must not be modified. -
type
public final com.yahoo.tensor.TensorType type(com.yahoo.tensor.evaluation.TypeContext<Reference> context) Description copied from class:ExpressionNode
Returns the type this will return if evaluated with the given context.- Specified by:
type
in classExpressionNode
- Parameters:
context
- the variable type bindings to use for this evaluation
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evaluate
Description copied from class:ExpressionNode
Returns the value of evaluating this expression over the given context.- Specified by:
evaluate
in classExpressionNode
- Parameters:
context
- the variable bindings to use for this evaluation
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evaluate
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toString
public StringBuilder toString(StringBuilder string, SerializationContext context, Deque<String> path, CompositeNode parent) Returns "(optimized condition tree)"- Specified by:
toString
in classExpressionNode
- Parameters:
string
- the StringBuilder that will be appended tocontext
- the serialization contextpath
- the call path to this, used for cycle detection, or null if this is a rootparent
- the parent node of this, or null if it is a root- Returns:
- the main script, referring to script instances.
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hashCode
public int hashCode()Description copied from class:ExpressionNode
Returns a hashcode computed from the data in this- Specified by:
hashCode
in classExpressionNode
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