https://lucene.apache.org/lucene-parent/lucene-core: Apache Lucene Java Core (The Apache Software Foundation) 
class org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag implements org.apache.lucene.util.Accountable
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag
  super_class: java.lang.Object
{
  private static final long BASE_RAM_BYTES_USED;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private final int[] keys;
    descriptor: [I
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final int[] freqs;
    descriptor: [I
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

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

  static final boolean $assertionsDisabled;
    descriptor: Z
    flags: (0x1018) ACC_STATIC, ACC_FINAL, ACC_SYNTHETIC

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 105
            ldc Lorg/apache/lucene/util/FrequencyTrackingRingBuffer;
            invokevirtual java.lang.Class.desiredAssertionStatus:()Z
            ifne 1
            iconst_1
            goto 2
      StackMap locals:
      StackMap stack:
         1: iconst_0
      StackMap locals:
      StackMap stack: int
         2: putstatic org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.$assertionsDisabled:Z
         3: .line 107
            ldc Lorg/apache/lucene/util/FrequencyTrackingRingBuffer$IntBag;
            invokestatic org.apache.lucene.util.RamUsageEstimator.shallowSizeOfInstance:(Ljava/lang/Class;)J
            putstatic org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.BASE_RAM_BYTES_USED:J
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  void <init>(int);
    descriptor: (I)V
    flags: (0x0000) 
    Code:
      stack=3, locals=3, args_size=2
        start local 0 // org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag this
        start local 1 // int maxSize
         0: .line 113
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 115
            iconst_2
            iload 1 /* maxSize */
            iconst_3
            imul
            iconst_2
            idiv
            invokestatic java.lang.Math.max:(II)I
            istore 2 /* capacity */
        start local 2 // int capacity
         2: .line 117
            iload 2 /* capacity */
            iconst_1
            isub
            invokestatic java.lang.Integer.highestOneBit:(I)I
            iconst_1
            ishl
            istore 2 /* capacity */
         3: .line 118
            getstatic org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.$assertionsDisabled:Z
            ifne 4
            iload 2 /* capacity */
            iload 1 /* maxSize */
            if_icmpgt 4
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         4: .line 119
      StackMap locals: org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag int int
      StackMap stack:
            aload 0 /* this */
            iload 2 /* capacity */
            newarray 10
            putfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.keys:[I
         5: .line 120
            aload 0 /* this */
            iload 2 /* capacity */
            newarray 10
            putfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.freqs:[I
         6: .line 121
            aload 0 /* this */
            iload 2 /* capacity */
            iconst_1
            isub
            putfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.mask:I
         7: .line 122
            return
        end local 2 // int capacity
        end local 1 // int maxSize
        end local 0 // org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    8     0      this  Lorg/apache/lucene/util/FrequencyTrackingRingBuffer$IntBag;
            0    8     1   maxSize  I
            2    8     2  capacity  I
    MethodParameters:
         Name  Flags
      maxSize  

  public long ramBytesUsed();
    descriptor: ()J
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=1, args_size=1
        start local 0 // org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag this
         0: .line 126
            getstatic org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.BASE_RAM_BYTES_USED:J
         1: .line 127
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.keys:[I
            invokestatic org.apache.lucene.util.RamUsageEstimator.sizeOf:([I)J
         2: .line 126
            ladd
         3: .line 128
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.freqs:[I
            invokestatic org.apache.lucene.util.RamUsageEstimator.sizeOf:([I)J
         4: .line 126
            ladd
            lreturn
        end local 0 // org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0  this  Lorg/apache/lucene/util/FrequencyTrackingRingBuffer$IntBag;

  int frequency(int);
    descriptor: (I)I
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag this
        start local 1 // int key
         0: .line 133
            iload 1 /* key */
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.mask:I
            iand
            istore 2 /* slot */
        start local 2 // int slot
         1: .line 134
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.keys:[I
            iload 2 /* slot */
            iaload
            iload 1 /* key */
            if_icmpne 3
         2: .line 135
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.freqs:[I
            iload 2 /* slot */
            iaload
            ireturn
         3: .line 136
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.freqs:[I
            iload 2 /* slot */
            iaload
            ifne 5
         4: .line 137
            iconst_0
            ireturn
         5: .line 133
      StackMap locals:
      StackMap stack:
            iload 2 /* slot */
            iconst_1
            iadd
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.mask:I
            iand
            istore 2 /* slot */
            goto 1
        end local 2 // int slot
        end local 1 // int key
        end local 0 // org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    6     0  this  Lorg/apache/lucene/util/FrequencyTrackingRingBuffer$IntBag;
            0    6     1   key  I
            1    6     2  slot  I
    MethodParameters:
      Name  Flags
      key   

  int add(int);
    descriptor: (I)I
    flags: (0x0000) 
    Code:
      stack=4, locals=3, args_size=2
        start local 0 // org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag this
        start local 1 // int key
         0: .line 144
            iload 1 /* key */
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.mask:I
            iand
            istore 2 /* slot */
        start local 2 // int slot
         1: .line 145
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.freqs:[I
            iload 2 /* slot */
            iaload
            ifne 4
         2: .line 146
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.keys:[I
            iload 2 /* slot */
            iload 1 /* key */
            iastore
         3: .line 147
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.freqs:[I
            iload 2 /* slot */
            iconst_1
            dup_x2
            iastore
            ireturn
         4: .line 148
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.keys:[I
            iload 2 /* slot */
            iaload
            iload 1 /* key */
            if_icmpne 6
         5: .line 149
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.freqs:[I
            iload 2 /* slot */
            dup2
            iaload
            iconst_1
            iadd
            dup_x2
            iastore
            ireturn
         6: .line 144
      StackMap locals:
      StackMap stack:
            iload 2 /* slot */
            iconst_1
            iadd
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.mask:I
            iand
            istore 2 /* slot */
            goto 1
        end local 2 // int slot
        end local 1 // int key
        end local 0 // org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0  this  Lorg/apache/lucene/util/FrequencyTrackingRingBuffer$IntBag;
            0    7     1   key  I
            1    7     2  slot  I
    MethodParameters:
      Name  Flags
      key   

  boolean remove(int);
    descriptor: (I)Z
    flags: (0x0000) 
    Code:
      stack=4, locals=4, args_size=2
        start local 0 // org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag this
        start local 1 // int key
         0: .line 158
            iload 1 /* key */
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.mask:I
            iand
            istore 2 /* slot */
        start local 2 // int slot
         1: .line 159
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.freqs:[I
            iload 2 /* slot */
            iaload
            ifne 3
         2: .line 161
            iconst_0
            ireturn
         3: .line 162
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.keys:[I
            iload 2 /* slot */
            iaload
            iload 1 /* key */
            if_icmpne 8
         4: .line 163
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.freqs:[I
            iload 2 /* slot */
            dup2
            iaload
            iconst_1
            isub
            dup_x2
            iastore
            istore 3 /* newFreq */
        start local 3 // int newFreq
         5: .line 164
            iload 3 /* newFreq */
            ifne 7
         6: .line 165
            aload 0 /* this */
            iload 2 /* slot */
            invokevirtual org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.relocateAdjacentKeys:(I)V
         7: .line 167
      StackMap locals: int
      StackMap stack:
            iconst_1
            ireturn
        end local 3 // int newFreq
         8: .line 158
      StackMap locals:
      StackMap stack:
            iload 2 /* slot */
            iconst_1
            iadd
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.mask:I
            iand
            istore 2 /* slot */
            goto 1
        end local 2 // int slot
        end local 1 // int key
        end local 0 // org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    9     0     this  Lorg/apache/lucene/util/FrequencyTrackingRingBuffer$IntBag;
            0    9     1      key  I
            1    9     2     slot  I
            5    8     3  newFreq  I
    MethodParameters:
      Name  Flags
      key   

  private void relocateAdjacentKeys(int);
    descriptor: (I)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=6, args_size=2
        start local 0 // org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag this
        start local 1 // int freeSlot
         0: .line 173
            iload 1 /* freeSlot */
            iconst_1
            iadd
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.mask:I
            iand
            istore 2 /* slot */
        start local 2 // int slot
         1: .line 174
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.freqs:[I
            iload 2 /* slot */
            iaload
            istore 3 /* freq */
        start local 3 // int freq
         2: .line 175
            iload 3 /* freq */
            ifne 4
         3: .line 177
            goto 12
         4: .line 179
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.keys:[I
            iload 2 /* slot */
            iaload
            istore 4 /* key */
        start local 4 // int key
         5: .line 181
            iload 4 /* key */
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.mask:I
            iand
            istore 5 /* expectedSlot */
        start local 5 // int expectedSlot
         6: .line 184
            iload 5 /* expectedSlot */
            iload 2 /* slot */
            iload 1 /* freeSlot */
            invokestatic org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.between:(III)Z
            ifeq 11
         7: .line 185
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.keys:[I
            iload 1 /* freeSlot */
            iload 4 /* key */
            iastore
         8: .line 186
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.freqs:[I
            iload 1 /* freeSlot */
            iload 3 /* freq */
            iastore
         9: .line 188
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.freqs:[I
            iload 2 /* slot */
            iconst_0
            iastore
        10: .line 189
            iload 2 /* slot */
            istore 1 /* freeSlot */
        end local 5 // int expectedSlot
        end local 4 // int key
        end local 3 // int freq
        11: .line 173
      StackMap locals:
      StackMap stack:
            iload 2 /* slot */
            iconst_1
            iadd
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.mask:I
            iand
            istore 2 /* slot */
            goto 1
        end local 2 // int slot
        12: .line 192
      StackMap locals:
      StackMap stack:
            return
        end local 1 // int freeSlot
        end local 0 // org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0   13     0          this  Lorg/apache/lucene/util/FrequencyTrackingRingBuffer$IntBag;
            0   13     1      freeSlot  I
            1   12     2          slot  I
            2   11     3          freq  I
            5   11     4           key  I
            6   11     5  expectedSlot  I
    MethodParameters:
          Name  Flags
      freeSlot  

  private static boolean between(int, int, int);
    descriptor: (III)Z
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // int chainStart
        start local 1 // int chainEnd
        start local 2 // int slot
         0: .line 198
            iload 0 /* chainStart */
            iload 1 /* chainEnd */
            if_icmpgt 3
         1: .line 199
            iload 0 /* chainStart */
            iload 2 /* slot */
            if_icmpgt 2
            iload 2 /* slot */
            iload 1 /* chainEnd */
            if_icmpgt 2
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         2: iconst_0
            ireturn
         3: .line 202
      StackMap locals:
      StackMap stack:
            iload 2 /* slot */
            iload 0 /* chainStart */
            if_icmpge 4
            iload 2 /* slot */
            iload 1 /* chainEnd */
            if_icmple 4
            iconst_0
            ireturn
      StackMap locals:
      StackMap stack:
         4: iconst_1
            ireturn
        end local 2 // int slot
        end local 1 // int chainEnd
        end local 0 // int chainStart
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    5     0  chainStart  I
            0    5     1    chainEnd  I
            0    5     2        slot  I
    MethodParameters:
            Name  Flags
      chainStart  
      chainEnd    
      slot        

  java.util.Map<java.lang.Integer, java.lang.Integer> asMap();
    descriptor: ()Ljava/util/Map;
    flags: (0x0000) 
    Code:
      stack=4, locals=3, args_size=1
        start local 0 // org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag this
         0: .line 207
            new java.util.HashMap
            dup
            invokespecial java.util.HashMap.<init>:()V
            astore 1 /* map */
        start local 1 // java.util.Map map
         1: .line 208
            iconst_0
            istore 2 /* i */
        start local 2 // int i
         2: goto 6
         3: .line 209
      StackMap locals: java.util.Map int
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.freqs:[I
            iload 2 /* i */
            iaload
            ifle 5
         4: .line 210
            aload 1 /* map */
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.keys:[I
            iload 2 /* i */
            iaload
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.freqs:[I
            iload 2 /* i */
            iaload
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            invokeinterface java.util.Map.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
         5: .line 208
      StackMap locals:
      StackMap stack:
            iinc 2 /* i */ 1
      StackMap locals:
      StackMap stack:
         6: iload 2 /* i */
            aload 0 /* this */
            getfield org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag.keys:[I
            arraylength
            if_icmplt 3
        end local 2 // int i
         7: .line 213
            aload 1 /* map */
            areturn
        end local 1 // java.util.Map map
        end local 0 // org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    8     0  this  Lorg/apache/lucene/util/FrequencyTrackingRingBuffer$IntBag;
            1    8     1   map  Ljava/util/Map<Ljava/lang/Integer;Ljava/lang/Integer;>;
            2    7     2     i  I
    Signature: ()Ljava/util/Map<Ljava/lang/Integer;Ljava/lang/Integer;>;
}
SourceFile: "FrequencyTrackingRingBuffer.java"
NestHost: org.apache.lucene.util.FrequencyTrackingRingBuffer
InnerClasses:
  private IntBag = org.apache.lucene.util.FrequencyTrackingRingBuffer$IntBag of org.apache.lucene.util.FrequencyTrackingRingBuffer