https://lucene.apache.org/lucene-parent/lucene-expressions: Dynamically computed values to sort/facet/search on based on a pluggable grammar. (The Apache Software Foundation) 
final class org.apache.lucene.expressions.CachingExpressionValueSource extends org.apache.lucene.expressions.ExpressionValueSource
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: org.apache.lucene.expressions.CachingExpressionValueSource
  super_class: org.apache.lucene.expressions.ExpressionValueSource
{
  void <init>(org.apache.lucene.expressions.Bindings, org.apache.lucene.expressions.Expression);
    descriptor: (Lorg/apache/lucene/expressions/Bindings;Lorg/apache/lucene/expressions/Expression;)V
    flags: (0x0000) 
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // org.apache.lucene.expressions.CachingExpressionValueSource this
        start local 1 // org.apache.lucene.expressions.Bindings bindings
        start local 2 // org.apache.lucene.expressions.Expression expression
         0: .line 35
            aload 0 /* this */
            aload 1 /* bindings */
            aload 2 /* expression */
            invokespecial org.apache.lucene.expressions.ExpressionValueSource.<init>:(Lorg/apache/lucene/expressions/Bindings;Lorg/apache/lucene/expressions/Expression;)V
         1: .line 36
            return
        end local 2 // org.apache.lucene.expressions.Expression expression
        end local 1 // org.apache.lucene.expressions.Bindings bindings
        end local 0 // org.apache.lucene.expressions.CachingExpressionValueSource this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    2     0        this  Lorg/apache/lucene/expressions/CachingExpressionValueSource;
            0    2     1    bindings  Lorg/apache/lucene/expressions/Bindings;
            0    2     2  expression  Lorg/apache/lucene/expressions/Expression;
    MethodParameters:
            Name  Flags
      bindings    
      expression  

  void <init>(org.apache.lucene.search.DoubleValuesSource[], org.apache.lucene.expressions.Expression, boolean);
    descriptor: ([Lorg/apache/lucene/search/DoubleValuesSource;Lorg/apache/lucene/expressions/Expression;Z)V
    flags: (0x0000) 
    Code:
      stack=4, locals=4, args_size=4
        start local 0 // org.apache.lucene.expressions.CachingExpressionValueSource this
        start local 1 // org.apache.lucene.search.DoubleValuesSource[] variables
        start local 2 // org.apache.lucene.expressions.Expression expression
        start local 3 // boolean needsScores
         0: .line 39
            aload 0 /* this */
            aload 1 /* variables */
            aload 2 /* expression */
            iload 3 /* needsScores */
            invokespecial org.apache.lucene.expressions.ExpressionValueSource.<init>:([Lorg/apache/lucene/search/DoubleValuesSource;Lorg/apache/lucene/expressions/Expression;Z)V
         1: .line 40
            return
        end local 3 // boolean needsScores
        end local 2 // org.apache.lucene.expressions.Expression expression
        end local 1 // org.apache.lucene.search.DoubleValuesSource[] variables
        end local 0 // org.apache.lucene.expressions.CachingExpressionValueSource this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    2     0         this  Lorg/apache/lucene/expressions/CachingExpressionValueSource;
            0    2     1    variables  [Lorg/apache/lucene/search/DoubleValuesSource;
            0    2     2   expression  Lorg/apache/lucene/expressions/Expression;
            0    2     3  needsScores  Z
    MethodParameters:
             Name  Flags
      variables    
      expression   
      needsScores  

  public void <init>(org.apache.lucene.expressions.ExpressionValueSource);
    descriptor: (Lorg/apache/lucene/expressions/ExpressionValueSource;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // org.apache.lucene.expressions.CachingExpressionValueSource this
        start local 1 // org.apache.lucene.expressions.ExpressionValueSource expressionValueSource
         0: .line 43
            aload 0 /* this */
            aload 1 /* expressionValueSource */
            getfield org.apache.lucene.expressions.ExpressionValueSource.variables:[Lorg/apache/lucene/search/DoubleValuesSource;
            aload 1 /* expressionValueSource */
            getfield org.apache.lucene.expressions.ExpressionValueSource.expression:Lorg/apache/lucene/expressions/Expression;
            aload 1 /* expressionValueSource */
            getfield org.apache.lucene.expressions.ExpressionValueSource.needsScores:Z
            invokespecial org.apache.lucene.expressions.ExpressionValueSource.<init>:([Lorg/apache/lucene/search/DoubleValuesSource;Lorg/apache/lucene/expressions/Expression;Z)V
         1: .line 44
            return
        end local 1 // org.apache.lucene.expressions.ExpressionValueSource expressionValueSource
        end local 0 // org.apache.lucene.expressions.CachingExpressionValueSource this
      LocalVariableTable:
        Start  End  Slot                   Name  Signature
            0    2     0                   this  Lorg/apache/lucene/expressions/CachingExpressionValueSource;
            0    2     1  expressionValueSource  Lorg/apache/lucene/expressions/ExpressionValueSource;
    MethodParameters:
                       Name  Flags
      expressionValueSource  

  public org.apache.lucene.search.DoubleValues getValues(org.apache.lucene.index.LeafReaderContext, org.apache.lucene.search.DoubleValues);
    descriptor: (Lorg/apache/lucene/index/LeafReaderContext;Lorg/apache/lucene/search/DoubleValues;)Lorg/apache/lucene/search/DoubleValues;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=3, args_size=3
        start local 0 // org.apache.lucene.expressions.CachingExpressionValueSource this
        start local 1 // org.apache.lucene.index.LeafReaderContext readerContext
        start local 2 // org.apache.lucene.search.DoubleValues scores
         0: .line 48
            aload 0 /* this */
            aload 1 /* readerContext */
            aload 2 /* scores */
            new java.util.HashMap
            dup
            invokespecial java.util.HashMap.<init>:()V
            invokevirtual org.apache.lucene.expressions.CachingExpressionValueSource.getValuesWithCache:(Lorg/apache/lucene/index/LeafReaderContext;Lorg/apache/lucene/search/DoubleValues;Ljava/util/Map;)Lorg/apache/lucene/search/DoubleValues;
            areturn
        end local 2 // org.apache.lucene.search.DoubleValues scores
        end local 1 // org.apache.lucene.index.LeafReaderContext readerContext
        end local 0 // org.apache.lucene.expressions.CachingExpressionValueSource this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    1     0           this  Lorg/apache/lucene/expressions/CachingExpressionValueSource;
            0    1     1  readerContext  Lorg/apache/lucene/index/LeafReaderContext;
            0    1     2         scores  Lorg/apache/lucene/search/DoubleValues;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
               Name  Flags
      readerContext  
      scores         

  private org.apache.lucene.search.DoubleValues getValuesWithCache(org.apache.lucene.index.LeafReaderContext, org.apache.lucene.search.DoubleValues, java.util.Map<java.lang.String, org.apache.lucene.search.DoubleValues>);
    descriptor: (Lorg/apache/lucene/index/LeafReaderContext;Lorg/apache/lucene/search/DoubleValues;Ljava/util/Map;)Lorg/apache/lucene/search/DoubleValues;
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=5, locals=8, args_size=4
        start local 0 // org.apache.lucene.expressions.CachingExpressionValueSource this
        start local 1 // org.apache.lucene.index.LeafReaderContext readerContext
        start local 2 // org.apache.lucene.search.DoubleValues scores
        start local 3 // java.util.Map valuesCache
         0: .line 53
            aload 0 /* this */
            getfield org.apache.lucene.expressions.CachingExpressionValueSource.expression:Lorg/apache/lucene/expressions/Expression;
            getfield org.apache.lucene.expressions.Expression.variables:[Ljava/lang/String;
            arraylength
            anewarray org.apache.lucene.search.DoubleValues
            astore 4 /* externalValues */
        start local 4 // org.apache.lucene.search.DoubleValues[] externalValues
         1: .line 55
            iconst_0
            istore 5 /* i */
        start local 5 // int i
         2: goto 17
         3: .line 56
      StackMap locals: org.apache.lucene.search.DoubleValues[] int
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.lucene.expressions.CachingExpressionValueSource.expression:Lorg/apache/lucene/expressions/Expression;
            getfield org.apache.lucene.expressions.Expression.variables:[Ljava/lang/String;
            iload 5 /* i */
            aaload
            astore 6 /* externalName */
        start local 6 // java.lang.String externalName
         4: .line 57
            aload 3 /* valuesCache */
            aload 6 /* externalName */
            invokeinterface java.util.Map.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast org.apache.lucene.search.DoubleValues
            astore 7 /* values */
        start local 7 // org.apache.lucene.search.DoubleValues values
         5: .line 58
            aload 7 /* values */
            ifnonnull 15
         6: .line 59
            aload 0 /* this */
            getfield org.apache.lucene.expressions.CachingExpressionValueSource.variables:[Lorg/apache/lucene/search/DoubleValuesSource;
            iload 5 /* i */
            aaload
            instanceof org.apache.lucene.expressions.CachingExpressionValueSource
            ifeq 9
         7: .line 60
            aload 0 /* this */
            getfield org.apache.lucene.expressions.CachingExpressionValueSource.variables:[Lorg/apache/lucene/search/DoubleValuesSource;
            iload 5 /* i */
            aaload
            checkcast org.apache.lucene.expressions.CachingExpressionValueSource
            aload 1 /* readerContext */
            aload 2 /* scores */
            aload 3 /* valuesCache */
            invokevirtual org.apache.lucene.expressions.CachingExpressionValueSource.getValuesWithCache:(Lorg/apache/lucene/index/LeafReaderContext;Lorg/apache/lucene/search/DoubleValues;Ljava/util/Map;)Lorg/apache/lucene/search/DoubleValues;
            astore 7 /* values */
         8: .line 61
            goto 10
         9: .line 62
      StackMap locals: java.lang.String org.apache.lucene.search.DoubleValues
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.lucene.expressions.CachingExpressionValueSource.variables:[Lorg/apache/lucene/search/DoubleValuesSource;
            iload 5 /* i */
            aaload
            aload 1 /* readerContext */
            aload 2 /* scores */
            invokevirtual org.apache.lucene.search.DoubleValuesSource.getValues:(Lorg/apache/lucene/index/LeafReaderContext;Lorg/apache/lucene/search/DoubleValues;)Lorg/apache/lucene/search/DoubleValues;
            astore 7 /* values */
        10: .line 64
      StackMap locals:
      StackMap stack:
            aload 7 /* values */
            ifnonnull 14
        11: .line 65
            new java.lang.RuntimeException
            dup
            new java.lang.StringBuilder
            dup
            ldc "Unrecognized variable ("
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 6 /* externalName */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            ldc ") referenced in expression ("
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
        12: .line 66
            aload 0 /* this */
            getfield org.apache.lucene.expressions.CachingExpressionValueSource.expression:Lorg/apache/lucene/expressions/Expression;
            getfield org.apache.lucene.expressions.Expression.sourceText:Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            ldc ")."
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
        13: .line 65
            invokespecial java.lang.RuntimeException.<init>:(Ljava/lang/String;)V
            athrow
        14: .line 68
      StackMap locals:
      StackMap stack:
            aload 3 /* valuesCache */
            aload 6 /* externalName */
            aload 7 /* values */
            invokeinterface java.util.Map.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
        15: .line 70
      StackMap locals:
      StackMap stack:
            aload 4 /* externalValues */
            iload 5 /* i */
            aload 7 /* values */
            invokestatic org.apache.lucene.expressions.CachingExpressionValueSource.zeroWhenUnpositioned:(Lorg/apache/lucene/search/DoubleValues;)Lorg/apache/lucene/search/DoubleValues;
            aastore
        end local 7 // org.apache.lucene.search.DoubleValues values
        end local 6 // java.lang.String externalName
        16: .line 55
            iinc 5 /* i */ 1
      StackMap locals:
      StackMap stack:
        17: iload 5 /* i */
            aload 0 /* this */
            getfield org.apache.lucene.expressions.CachingExpressionValueSource.variables:[Lorg/apache/lucene/search/DoubleValuesSource;
            arraylength
            if_icmplt 3
        end local 5 // int i
        18: .line 73
            new org.apache.lucene.expressions.ExpressionFunctionValues
            dup
            aload 0 /* this */
            getfield org.apache.lucene.expressions.CachingExpressionValueSource.expression:Lorg/apache/lucene/expressions/Expression;
            aload 4 /* externalValues */
            invokespecial org.apache.lucene.expressions.ExpressionFunctionValues.<init>:(Lorg/apache/lucene/expressions/Expression;[Lorg/apache/lucene/search/DoubleValues;)V
            areturn
        end local 4 // org.apache.lucene.search.DoubleValues[] externalValues
        end local 3 // java.util.Map valuesCache
        end local 2 // org.apache.lucene.search.DoubleValues scores
        end local 1 // org.apache.lucene.index.LeafReaderContext readerContext
        end local 0 // org.apache.lucene.expressions.CachingExpressionValueSource this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0   19     0            this  Lorg/apache/lucene/expressions/CachingExpressionValueSource;
            0   19     1   readerContext  Lorg/apache/lucene/index/LeafReaderContext;
            0   19     2          scores  Lorg/apache/lucene/search/DoubleValues;
            0   19     3     valuesCache  Ljava/util/Map<Ljava/lang/String;Lorg/apache/lucene/search/DoubleValues;>;
            1   19     4  externalValues  [Lorg/apache/lucene/search/DoubleValues;
            2   18     5               i  I
            4   16     6    externalName  Ljava/lang/String;
            5   16     7          values  Lorg/apache/lucene/search/DoubleValues;
    Exceptions:
      throws java.io.IOException
    Signature: (Lorg/apache/lucene/index/LeafReaderContext;Lorg/apache/lucene/search/DoubleValues;Ljava/util/Map<Ljava/lang/String;Lorg/apache/lucene/search/DoubleValues;>;)Lorg/apache/lucene/search/DoubleValues;
    MethodParameters:
               Name  Flags
      readerContext  
      scores         
      valuesCache    
}
SourceFile: "CachingExpressionValueSource.java"