HBASE-26792 Implement ScanInfo#toString (#4155)

Signed-off-by: Duo Zhang <zhangduo@apache.org>

Author: shahrs87

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ScanInfo.java

@@ -18,6 +18,7 @@
 
 package org.apache.hadoop.hbase.regionserver;
 
+import org.apache.commons.lang.builder.ToStringBuilder;
 import org.apache.hadoop.hbase.classification.InterfaceAudience;
 import org.apache.hadoop.hbase.HColumnDescriptor;
 import org.apache.hadoop.hbase.KeepDeletedCells;
@@ -146,4 +147,19 @@ public long getTimeToPurgeDeletes() {
   public KVComparator getComparator() {
     return comparator;
   }
+
+  @Override
+  public String toString() {
+    return new ToStringBuilder(this)
+      .append("family", Bytes.toStringBinary(family))
+      .append("minVersions", minVersions)
+      .append("maxVersions", maxVersions)
+      .append("ttl", ttl)
+      .append("keepDeletedCells", keepDeletedCells)
+      .append("timeToPurgeDeletes", timeToPurgeDeletes)
+      .append("tableMaxRowSize", tableMaxRowSize)
+      .append("usePread", usePread)
+      .append("cellsPerTimeoutCheck", cellsPerTimeoutCheck)
+      .append("parallelSeekEnabled", parallelSeekEnabled).toString();
+  }
 }