final class org.apache.lucene.document.FeatureField$SigmoidFunction extends org.apache.lucene.document.FeatureField$FeatureFunction
minor version: 0
major version: 59
flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
this_class: org.apache.lucene.document.FeatureField$SigmoidFunction
super_class: org.apache.lucene.document.FeatureField$FeatureFunction
{
private final float pivot;
descriptor: F
flags: (0x0012) ACC_PRIVATE, ACC_FINAL
private final float a;
descriptor: F
flags: (0x0012) ACC_PRIVATE, ACC_FINAL
private final double pivotPa;
descriptor: D
flags: (0x0012) ACC_PRIVATE, ACC_FINAL
void <init>(float, float);
descriptor: (FF)V
flags: (0x0000)
Code:
stack=5, locals=3, args_size=3
start local 0 start local 1 start local 2 0: aload 0
invokespecial org.apache.lucene.document.FeatureField$FeatureFunction.<init>:()V
1: aload 0
fload 1
putfield org.apache.lucene.document.FeatureField$SigmoidFunction.pivot:F
2: aload 0
fload 2
putfield org.apache.lucene.document.FeatureField$SigmoidFunction.a:F
3: aload 0
fload 1
f2d
fload 2
f2d
invokestatic java.lang.Math.pow:(DD)D
putfield org.apache.lucene.document.FeatureField$SigmoidFunction.pivotPa:D
4: return
end local 2 end local 1 end local 0 LocalVariableTable:
Start End Slot Name Signature
0 5 0 this Lorg/apache/lucene/document/FeatureField$SigmoidFunction;
0 5 1 pivot F
0 5 2 a F
MethodParameters:
Name Flags
pivot
a
public boolean equals(java.lang.Object);
descriptor: (Ljava/lang/Object;)Z
flags: (0x0001) ACC_PUBLIC
Code:
stack=2, locals=3, args_size=2
start local 0 start local 1 0: aload 1
ifnull 1
aload 0
invokevirtual java.lang.Object.getClass:()Ljava/lang/Class;
aload 1
invokevirtual java.lang.Object.getClass:()Ljava/lang/Class;
if_acmpeq 2
1: StackMap locals:
StackMap stack:
iconst_0
ireturn
2: StackMap locals:
StackMap stack:
aload 1
checkcast org.apache.lucene.document.FeatureField$SigmoidFunction
astore 2
start local 2 3: aload 0
getfield org.apache.lucene.document.FeatureField$SigmoidFunction.pivot:F
aload 2
getfield org.apache.lucene.document.FeatureField$SigmoidFunction.pivot:F
fcmpl
ifne 6
4: aload 0
getfield org.apache.lucene.document.FeatureField$SigmoidFunction.a:F
aload 2
getfield org.apache.lucene.document.FeatureField$SigmoidFunction.a:F
fcmpl
ifne 6
5: iconst_1
ireturn
StackMap locals: org.apache.lucene.document.FeatureField$SigmoidFunction
StackMap stack:
6: iconst_0
ireturn
end local 2 end local 1 end local 0 LocalVariableTable:
Start End Slot Name Signature
0 7 0 this Lorg/apache/lucene/document/FeatureField$SigmoidFunction;
0 7 1 obj Ljava/lang/Object;
3 7 2 that Lorg/apache/lucene/document/FeatureField$SigmoidFunction;
MethodParameters:
Name Flags
obj
public int hashCode();
descriptor: ()I
flags: (0x0001) ACC_PUBLIC
Code:
stack=2, locals=2, args_size=1
start local 0 0: aload 0
getfield org.apache.lucene.document.FeatureField$SigmoidFunction.pivot:F
invokestatic java.lang.Float.hashCode:(F)I
istore 1
start local 1 1: bipush 31
iload 1
imul
aload 0
getfield org.apache.lucene.document.FeatureField$SigmoidFunction.a:F
invokestatic java.lang.Float.hashCode:(F)I
iadd
istore 1
2: iload 1
ireturn
end local 1 end local 0 LocalVariableTable:
Start End Slot Name Signature
0 3 0 this Lorg/apache/lucene/document/FeatureField$SigmoidFunction;
1 3 1 h I
public java.lang.String toString();
descriptor: ()Ljava/lang/String;
flags: (0x0001) ACC_PUBLIC
Code:
stack=3, locals=1, args_size=1
start local 0 0: new java.lang.StringBuilder
dup
ldc "SigmoidFunction(pivot="
invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
aload 0
getfield org.apache.lucene.document.FeatureField$SigmoidFunction.pivot:F
invokevirtual java.lang.StringBuilder.append:(F)Ljava/lang/StringBuilder;
ldc ", a="
invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
aload 0
getfield org.apache.lucene.document.FeatureField$SigmoidFunction.a:F
invokevirtual java.lang.StringBuilder.append:(F)Ljava/lang/StringBuilder;
ldc ")"
invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
areturn
end local 0 LocalVariableTable:
Start End Slot Name Signature
0 1 0 this Lorg/apache/lucene/document/FeatureField$SigmoidFunction;
org.apache.lucene.search.similarities.Similarity$SimScorer scorer(float);
descriptor: (F)Lorg/apache/lucene/search/similarities/Similarity$SimScorer;
flags: (0x0000)
Code:
stack=4, locals=2, args_size=2
start local 0 start local 1 0: new org.apache.lucene.document.FeatureField$SigmoidFunction$1
dup
aload 0
fload 1
invokespecial org.apache.lucene.document.FeatureField$SigmoidFunction$1.<init>:(Lorg/apache/lucene/document/FeatureField$SigmoidFunction;F)V
areturn
end local 1 end local 0 LocalVariableTable:
Start End Slot Name Signature
0 1 0 this Lorg/apache/lucene/document/FeatureField$SigmoidFunction;
0 1 1 weight F
MethodParameters:
Name Flags
weight
org.apache.lucene.search.Explanation explain(java.lang.String, java.lang.String, float, int);
descriptor: (Ljava/lang/String;Ljava/lang/String;FI)Lorg/apache/lucene/search/Explanation;
flags: (0x0000)
Code:
stack=8, locals=7, args_size=5
start local 0 start local 1 start local 2 start local 3 start local 4 0: iload 4
i2f
invokestatic org.apache.lucene.document.FeatureField.decodeFeatureValue:(F)F
fstore 5
start local 5 1: aload 0
fload 3
invokevirtual org.apache.lucene.document.FeatureField$SigmoidFunction.scorer:(F)Lorg/apache/lucene/search/similarities/Similarity$SimScorer;
iload 4
i2f
lconst_1
invokevirtual org.apache.lucene.search.similarities.Similarity$SimScorer.score:(FJ)F
fstore 6
start local 6 2: fload 6
invokestatic java.lang.Float.valueOf:(F)Ljava/lang/Float;
3: new java.lang.StringBuilder
dup
ldc "Sigmoid function on the "
invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
aload 1
invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
ldc " field for the "
invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
aload 2
invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
ldc " feature, computed as w * S^a / (S^a + k^a) from:"
invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
iconst_4
anewarray org.apache.lucene.search.Explanation
dup
iconst_0
4: fload 3
invokestatic java.lang.Float.valueOf:(F)Ljava/lang/Float;
ldc "w, weight of this function"
iconst_0
anewarray org.apache.lucene.search.Explanation
invokestatic org.apache.lucene.search.Explanation.match:(Ljava/lang/Number;Ljava/lang/String;[Lorg/apache/lucene/search/Explanation;)Lorg/apache/lucene/search/Explanation;
aastore
dup
iconst_1
5: aload 0
getfield org.apache.lucene.document.FeatureField$SigmoidFunction.pivot:F
invokestatic java.lang.Float.valueOf:(F)Ljava/lang/Float;
ldc "k, pivot feature value that would give a score contribution equal to w/2"
iconst_0
anewarray org.apache.lucene.search.Explanation
invokestatic org.apache.lucene.search.Explanation.match:(Ljava/lang/Number;Ljava/lang/String;[Lorg/apache/lucene/search/Explanation;)Lorg/apache/lucene/search/Explanation;
aastore
dup
iconst_2
6: aload 0
getfield org.apache.lucene.document.FeatureField$SigmoidFunction.pivot:F
invokestatic java.lang.Float.valueOf:(F)Ljava/lang/Float;
ldc "a, exponent, higher values make the function grow slower before k and faster after k"
iconst_0
anewarray org.apache.lucene.search.Explanation
invokestatic org.apache.lucene.search.Explanation.match:(Ljava/lang/Number;Ljava/lang/String;[Lorg/apache/lucene/search/Explanation;)Lorg/apache/lucene/search/Explanation;
aastore
dup
iconst_3
7: fload 5
invokestatic java.lang.Float.valueOf:(F)Ljava/lang/Float;
ldc "S, feature value"
iconst_0
anewarray org.apache.lucene.search.Explanation
invokestatic org.apache.lucene.search.Explanation.match:(Ljava/lang/Number;Ljava/lang/String;[Lorg/apache/lucene/search/Explanation;)Lorg/apache/lucene/search/Explanation;
aastore
8: invokestatic org.apache.lucene.search.Explanation.match:(Ljava/lang/Number;Ljava/lang/String;[Lorg/apache/lucene/search/Explanation;)Lorg/apache/lucene/search/Explanation;
areturn
end local 6 end local 5 end local 4 end local 3 end local 2 end local 1 end local 0 LocalVariableTable:
Start End Slot Name Signature
0 9 0 this Lorg/apache/lucene/document/FeatureField$SigmoidFunction;
0 9 1 field Ljava/lang/String;
0 9 2 feature Ljava/lang/String;
0 9 3 weight F
0 9 4 freq I
1 9 5 featureValue F
2 9 6 score F
MethodParameters:
Name Flags
field
feature
weight
freq
}
SourceFile: "FeatureField.java"
NestHost: org.apache.lucene.document.FeatureField
InnerClasses:
abstract FeatureFunction = org.apache.lucene.document.FeatureField$FeatureFunction of org.apache.lucene.document.FeatureField
final SigmoidFunction = org.apache.lucene.document.FeatureField$SigmoidFunction of org.apache.lucene.document.FeatureField
org.apache.lucene.document.FeatureField$SigmoidFunction$1
public abstract SimScorer = org.apache.lucene.search.similarities.Similarity$SimScorer of org.apache.lucene.search.similarities.Similarity