https://lucene.apache.org/lucene-parent/lucene-join: Lucene Join Module (The Apache Software Foundation) 
public class org.apache.lucene.search.join.ParentChildrenBlockJoinQuery extends org.apache.lucene.search.Query
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.apache.lucene.search.join.ParentChildrenBlockJoinQuery
  super_class: org.apache.lucene.search.Query
{
  private final org.apache.lucene.search.join.BitSetProducer parentFilter;
    descriptor: Lorg/apache/lucene/search/join/BitSetProducer;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final org.apache.lucene.search.Query childQuery;
    descriptor: Lorg/apache/lucene/search/Query;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final int parentDocId;
    descriptor: I
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  public void <init>(org.apache.lucene.search.join.BitSetProducer, org.apache.lucene.search.Query, int);
    descriptor: (Lorg/apache/lucene/search/join/BitSetProducer;Lorg/apache/lucene/search/Query;I)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=4, args_size=4
        start local 0 // org.apache.lucene.search.join.ParentChildrenBlockJoinQuery this
        start local 1 // org.apache.lucene.search.join.BitSetProducer parentFilter
        start local 2 // org.apache.lucene.search.Query childQuery
        start local 3 // int parentDocId
         0: .line 56
            aload 0 /* this */
            invokespecial org.apache.lucene.search.Query.<init>:()V
         1: .line 57
            aload 0 /* this */
            aload 1 /* parentFilter */
            putfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.parentFilter:Lorg/apache/lucene/search/join/BitSetProducer;
         2: .line 58
            aload 0 /* this */
            aload 2 /* childQuery */
            putfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.childQuery:Lorg/apache/lucene/search/Query;
         3: .line 59
            aload 0 /* this */
            iload 3 /* parentDocId */
            putfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.parentDocId:I
         4: .line 60
            return
        end local 3 // int parentDocId
        end local 2 // org.apache.lucene.search.Query childQuery
        end local 1 // org.apache.lucene.search.join.BitSetProducer parentFilter
        end local 0 // org.apache.lucene.search.join.ParentChildrenBlockJoinQuery this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    5     0          this  Lorg/apache/lucene/search/join/ParentChildrenBlockJoinQuery;
            0    5     1  parentFilter  Lorg/apache/lucene/search/join/BitSetProducer;
            0    5     2    childQuery  Lorg/apache/lucene/search/Query;
            0    5     3   parentDocId  I
    MethodParameters:
              Name  Flags
      parentFilter  
      childQuery    
      parentDocId   

  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 // org.apache.lucene.search.join.ParentChildrenBlockJoinQuery this
        start local 1 // java.lang.Object obj
         0: .line 64
            aload 0 /* this */
            aload 1 /* obj */
            invokevirtual org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.sameClassAs:(Ljava/lang/Object;)Z
            ifne 2
         1: .line 65
            iconst_0
            ireturn
         2: .line 67
      StackMap locals:
      StackMap stack:
            aload 1 /* obj */
            checkcast org.apache.lucene.search.join.ParentChildrenBlockJoinQuery
            astore 2 /* other */
        start local 2 // org.apache.lucene.search.join.ParentChildrenBlockJoinQuery other
         3: .line 68
            aload 0 /* this */
            getfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.parentFilter:Lorg/apache/lucene/search/join/BitSetProducer;
            aload 2 /* other */
            getfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.parentFilter:Lorg/apache/lucene/search/join/BitSetProducer;
            invokevirtual java.lang.Object.equals:(Ljava/lang/Object;)Z
            ifeq 7
         4: .line 69
            aload 0 /* this */
            getfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.childQuery:Lorg/apache/lucene/search/Query;
            aload 2 /* other */
            getfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.childQuery:Lorg/apache/lucene/search/Query;
            invokevirtual org.apache.lucene.search.Query.equals:(Ljava/lang/Object;)Z
            ifeq 7
         5: .line 70
            aload 0 /* this */
            getfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.parentDocId:I
            aload 2 /* other */
            getfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.parentDocId:I
            if_icmpne 7
         6: .line 68
            iconst_1
            ireturn
      StackMap locals: org.apache.lucene.search.join.ParentChildrenBlockJoinQuery
      StackMap stack:
         7: iconst_0
            ireturn
        end local 2 // org.apache.lucene.search.join.ParentChildrenBlockJoinQuery other
        end local 1 // java.lang.Object obj
        end local 0 // org.apache.lucene.search.join.ParentChildrenBlockJoinQuery this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    8     0   this  Lorg/apache/lucene/search/join/ParentChildrenBlockJoinQuery;
            0    8     1    obj  Ljava/lang/Object;
            3    8     2  other  Lorg/apache/lucene/search/join/ParentChildrenBlockJoinQuery;
    MethodParameters:
      Name  Flags
      obj   

  public int hashCode();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // org.apache.lucene.search.join.ParentChildrenBlockJoinQuery this
         0: .line 75
            aload 0 /* this */
            invokevirtual org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.classHash:()I
            istore 1 /* hash */
        start local 1 // int hash
         1: .line 76
            bipush 31
            iload 1 /* hash */
            imul
            aload 0 /* this */
            getfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.parentFilter:Lorg/apache/lucene/search/join/BitSetProducer;
            invokevirtual java.lang.Object.hashCode:()I
            iadd
            istore 1 /* hash */
         2: .line 77
            bipush 31
            iload 1 /* hash */
            imul
            aload 0 /* this */
            getfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.childQuery:Lorg/apache/lucene/search/Query;
            invokevirtual org.apache.lucene.search.Query.hashCode:()I
            iadd
            istore 1 /* hash */
         3: .line 78
            bipush 31
            iload 1 /* hash */
            imul
            aload 0 /* this */
            getfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.parentDocId:I
            iadd
            istore 1 /* hash */
         4: .line 79
            iload 1 /* hash */
            ireturn
        end local 1 // int hash
        end local 0 // org.apache.lucene.search.join.ParentChildrenBlockJoinQuery this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0  this  Lorg/apache/lucene/search/join/ParentChildrenBlockJoinQuery;
            1    5     1  hash  I

  public java.lang.String toString(java.lang.String);
    descriptor: (Ljava/lang/String;)Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.apache.lucene.search.join.ParentChildrenBlockJoinQuery this
        start local 1 // java.lang.String field
         0: .line 84
            new java.lang.StringBuilder
            dup
            ldc "ParentChildrenBlockJoinQuery ("
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* this */
            getfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.childQuery:Lorg/apache/lucene/search/Query;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)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 1 // java.lang.String field
        end local 0 // org.apache.lucene.search.join.ParentChildrenBlockJoinQuery this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lorg/apache/lucene/search/join/ParentChildrenBlockJoinQuery;
            0    1     1  field  Ljava/lang/String;
    MethodParameters:
       Name  Flags
      field  

  public void visit(org.apache.lucene.search.QueryVisitor);
    descriptor: (Lorg/apache/lucene/search/QueryVisitor;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.apache.lucene.search.join.ParentChildrenBlockJoinQuery this
        start local 1 // org.apache.lucene.search.QueryVisitor visitor
         0: .line 89
            aload 1 /* visitor */
            aload 0 /* this */
            invokevirtual org.apache.lucene.search.QueryVisitor.visitLeaf:(Lorg/apache/lucene/search/Query;)V
         1: .line 90
            return
        end local 1 // org.apache.lucene.search.QueryVisitor visitor
        end local 0 // org.apache.lucene.search.join.ParentChildrenBlockJoinQuery this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    2     0     this  Lorg/apache/lucene/search/join/ParentChildrenBlockJoinQuery;
            0    2     1  visitor  Lorg/apache/lucene/search/QueryVisitor;
    MethodParameters:
         Name  Flags
      visitor  

  public org.apache.lucene.search.Query rewrite(org.apache.lucene.index.IndexReader);
    descriptor: (Lorg/apache/lucene/index/IndexReader;)Lorg/apache/lucene/search/Query;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=3, args_size=2
        start local 0 // org.apache.lucene.search.join.ParentChildrenBlockJoinQuery this
        start local 1 // org.apache.lucene.index.IndexReader reader
         0: .line 94
            aload 0 /* this */
            getfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.childQuery:Lorg/apache/lucene/search/Query;
            aload 1 /* reader */
            invokevirtual org.apache.lucene.search.Query.rewrite:(Lorg/apache/lucene/index/IndexReader;)Lorg/apache/lucene/search/Query;
            astore 2 /* childRewrite */
        start local 2 // org.apache.lucene.search.Query childRewrite
         1: .line 95
            aload 2 /* childRewrite */
            aload 0 /* this */
            getfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.childQuery:Lorg/apache/lucene/search/Query;
            if_acmpeq 3
         2: .line 96
            new org.apache.lucene.search.join.ParentChildrenBlockJoinQuery
            dup
            aload 0 /* this */
            getfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.parentFilter:Lorg/apache/lucene/search/join/BitSetProducer;
            aload 2 /* childRewrite */
            aload 0 /* this */
            getfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.parentDocId:I
            invokespecial org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.<init>:(Lorg/apache/lucene/search/join/BitSetProducer;Lorg/apache/lucene/search/Query;I)V
            areturn
         3: .line 98
      StackMap locals: org.apache.lucene.search.Query
      StackMap stack:
            aload 0 /* this */
            aload 1 /* reader */
            invokespecial org.apache.lucene.search.Query.rewrite:(Lorg/apache/lucene/index/IndexReader;)Lorg/apache/lucene/search/Query;
            areturn
        end local 2 // org.apache.lucene.search.Query childRewrite
        end local 1 // org.apache.lucene.index.IndexReader reader
        end local 0 // org.apache.lucene.search.join.ParentChildrenBlockJoinQuery this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    4     0          this  Lorg/apache/lucene/search/join/ParentChildrenBlockJoinQuery;
            0    4     1        reader  Lorg/apache/lucene/index/IndexReader;
            1    4     2  childRewrite  Lorg/apache/lucene/search/Query;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
        Name  Flags
      reader  

  public org.apache.lucene.search.Weight createWeight(org.apache.lucene.search.IndexSearcher, org.apache.lucene.search.ScoreMode, float);
    descriptor: (Lorg/apache/lucene/search/IndexSearcher;Lorg/apache/lucene/search/ScoreMode;F)Lorg/apache/lucene/search/Weight;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=6, args_size=4
        start local 0 // org.apache.lucene.search.join.ParentChildrenBlockJoinQuery this
        start local 1 // org.apache.lucene.search.IndexSearcher searcher
        start local 2 // org.apache.lucene.search.ScoreMode scoreMode
        start local 3 // float boost
         0: .line 104
            aload 0 /* this */
            getfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.childQuery:Lorg/apache/lucene/search/Query;
            aload 1 /* searcher */
            aload 2 /* scoreMode */
            fload 3 /* boost */
            invokevirtual org.apache.lucene.search.Query.createWeight:(Lorg/apache/lucene/search/IndexSearcher;Lorg/apache/lucene/search/ScoreMode;F)Lorg/apache/lucene/search/Weight;
            astore 4 /* childWeight */
        start local 4 // org.apache.lucene.search.Weight childWeight
         1: .line 105
            aload 0 /* this */
            getfield org.apache.lucene.search.join.ParentChildrenBlockJoinQuery.parentDocId:I
            aload 1 /* searcher */
            invokevirtual org.apache.lucene.search.IndexSearcher.getIndexReader:()Lorg/apache/lucene/index/IndexReader;
            invokevirtual org.apache.lucene.index.IndexReader.leaves:()Ljava/util/List;
            invokestatic org.apache.lucene.index.ReaderUtil.subIndex:(ILjava/util/List;)I
            istore 5 /* readerIndex */
        start local 5 // int readerIndex
         2: .line 106
            new org.apache.lucene.search.join.ParentChildrenBlockJoinQuery$1
            dup
            aload 0 /* this */
            aload 0 /* this */
            aload 4 /* childWeight */
            iload 5 /* readerIndex */
            invokespecial org.apache.lucene.search.join.ParentChildrenBlockJoinQuery$1.<init>:(Lorg/apache/lucene/search/join/ParentChildrenBlockJoinQuery;Lorg/apache/lucene/search/Query;Lorg/apache/lucene/search/Weight;I)V
            areturn
        end local 5 // int readerIndex
        end local 4 // org.apache.lucene.search.Weight childWeight
        end local 3 // float boost
        end local 2 // org.apache.lucene.search.ScoreMode scoreMode
        end local 1 // org.apache.lucene.search.IndexSearcher searcher
        end local 0 // org.apache.lucene.search.join.ParentChildrenBlockJoinQuery this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    3     0         this  Lorg/apache/lucene/search/join/ParentChildrenBlockJoinQuery;
            0    3     1     searcher  Lorg/apache/lucene/search/IndexSearcher;
            0    3     2    scoreMode  Lorg/apache/lucene/search/ScoreMode;
            0    3     3        boost  F
            1    3     4  childWeight  Lorg/apache/lucene/search/Weight;
            2    3     5  readerIndex  I
    Exceptions:
      throws java.io.IOException
    MethodParameters:
           Name  Flags
      searcher   
      scoreMode  
      boost      
}
SourceFile: "ParentChildrenBlockJoinQuery.java"
NestMembers:
  org.apache.lucene.search.join.ParentChildrenBlockJoinQuery$1  org.apache.lucene.search.join.ParentChildrenBlockJoinQuery$1$1  org.apache.lucene.search.join.ParentChildrenBlockJoinQuery$1$2
InnerClasses:
  org.apache.lucene.search.join.ParentChildrenBlockJoinQuery$1