Class Column

  • All Implemented Interfaces:
    Comparable<Column>, org.apache.hadoop.io.Writable, org.apache.hadoop.io.WritableComparable<Column>

    public class Column
    extends Object
    implements org.apache.hadoop.io.WritableComparable<Column>
    A column, specified by family, qualifier, and visibility.
    • Field Detail

      • columnFamily

        public byte[] columnFamily
      • columnQualifier

        public byte[] columnQualifier
      • columnVisibility

        public byte[] columnVisibility
    • Constructor Detail

      • Column

        public Column()
        Creates a new blank column.
      • Column

        public Column​(byte[] columnFamily,
                      byte[] columnQualifier,
                      byte[] columnVisibility)
        Creates a new column.
        Parameters:
        columnFamily - family
        columnQualifier - qualifier
        columnVisibility - visibility
      • Column

        public Column​(org.apache.accumulo.core.dataImpl.thrift.TColumn tcol)
        Creates a new column.
        Parameters:
        tcol - Thrift column
    • Method Detail

      • compareTo

        public int compareTo​(Column that)
        Compares this column to another. Column families are compared first, then qualifiers, then visibilities.
        Specified by:
        compareTo in interface Comparable<Column>
        Parameters:
        that - column to compare
        Returns:
        comparison result
      • readFields

        public void readFields​(DataInput in)
                        throws IOException
        Specified by:
        readFields in interface org.apache.hadoop.io.Writable
        Throws:
        IOException
      • equals

        public boolean equals​(Column that)
        Checks if this column equals another.
        Parameters:
        that - column to compare
        Returns:
        true if this column equals that, false otherwise
      • hashCode

        public int hashCode()
        Overrides:
        hashCode in class Object
      • getColumnFamily

        public byte[] getColumnFamily()
        Gets the column family. Not a defensive copy.
        Returns:
        family
      • getColumnQualifier

        public byte[] getColumnQualifier()
        Gets the column qualifier. Not a defensive copy.
        Returns:
        qualifier
      • getColumnVisibility

        public byte[] getColumnVisibility()
        Gets the column visibility. Not a defensive copy.
        Returns:
        visibility
      • toString

        public String toString()
        Gets a string representation of this column. The family, qualifier, and visibility are interpreted as strings using the UTF-8 encoding; nulls are interpreted as empty strings.
        Overrides:
        toString in class Object
        Returns:
        string form of column
      • toThrift

        public org.apache.accumulo.core.dataImpl.thrift.TColumn toThrift()
        Converts this column to Thrift.
        Returns:
        Thrift column