remove FST's BytesReader#reversed() (#12777)

Author: dungba88

lucene/core/src/java/org/apache/lucene/util/fst/ByteBlockPoolReverseBytesReader.java

@@ -58,11 +58,6 @@ public void setPosition(long pos) {
     this.pos = pos - posDelta;
   }
 
-  @Override
-  public boolean reversed() {
-    return true;
-  }
-
   public void setPosDelta(long posDelta) {
     this.posDelta = posDelta;
   }

lucene/core/src/java/org/apache/lucene/util/fst/BytesStore.java

@@ -434,11 +434,6 @@ public void setPosition(long pos) {
         nextRead = (int) (pos & blockMask);
         assert getPosition() == pos;
       }
-
-      @Override
-      public boolean reversed() {
-        return false;
-      }
     };
   }
 
@@ -492,11 +487,6 @@ public void setPosition(long pos) {
         nextRead = (int) (pos & blockMask);
         assert getPosition() == pos : "pos=" + pos + " getPos()=" + getPosition();
       }
-
-      @Override
-      public boolean reversed() {
-        return true;
-      }
     };
   }
 

lucene/core/src/java/org/apache/lucene/util/fst/FST.java

@@ -1135,9 +1135,6 @@ public abstract static class BytesReader extends DataInput {
 
     /** Set current read position. */
     public abstract void setPosition(long pos);
-
-    /** Returns true if this reader uses reversed bytes under-the-hood. */
-    public abstract boolean reversed();
   }
 
   /**

lucene/core/src/java/org/apache/lucene/util/fst/ForwardBytesReader.java

@@ -53,9 +53,4 @@ public long getPosition() {
   public void setPosition(long pos) {
     this.pos = (int) pos;
   }
-
-  @Override
-  public boolean reversed() {
-    return false;
-  }
 }

lucene/core/src/java/org/apache/lucene/util/fst/ReverseBytesReader.java

@@ -51,9 +51,4 @@ public long getPosition() {
   public void setPosition(long pos) {
     this.pos = (int) pos;
   }
-
-  @Override
-  public boolean reversed() {
-    return true;
-  }
 }

lucene/core/src/java/org/apache/lucene/util/fst/ReverseRandomAccessReader.java

@@ -55,9 +55,4 @@ public long getPosition() {
   public void setPosition(long pos) {
     this.pos = pos;
   }
-
-  @Override
-  public boolean reversed() {
-    return true;
-  }
 }

lucene/core/src/test/org/apache/lucene/util/fst/TestBitTableUtil.java

@@ -154,11 +154,6 @@ public void setPosition(long pos) {
       position = (int) pos;
     }
 
-    @Override
-    public boolean reversed() {
-      return false;
-    }
-
     @Override
     public byte readByte() {
       return bits[position++];

lucene/core/src/test/org/apache/lucene/util/fst/TestBytesStore.java

@@ -272,7 +272,6 @@ private void verify(BytesStore bytes, byte[] expected, int totalLength) throws E
       }
       // reversed
       FST.BytesReader r = bytes.getReverseBytesReader();
-      assertTrue(r.reversed());
       r.setPosition(totalLength - 1);
       r.readBytes(actual, 0, actual.length);
       int start = 0;
@@ -290,7 +289,6 @@ private void verify(BytesStore bytes, byte[] expected, int totalLength) throws E
         System.out.println("    bulk: forward");
       }
       FST.BytesReader r = bytes.getForwardReader();
-      assertFalse(r.reversed());
       r.readBytes(actual, 0, actual.length);
     }