Package org.h2.value

Class ValueNull

  • All Implemented Interfaces:
    HasSQL, Typed

    public final class ValueNull
    extends Value
    Implementation of NULL. NULL is not a regular data type.
    • Field Detail

      • INSTANCE

        public static final ValueNull INSTANCE
        The main NULL instance.
      • DISPLAY_SIZE

        static final int DISPLAY_SIZE
        The display size of the textual representation of NULL.
        See Also:
        Constant Field Values
    • Constructor Detail

      • ValueNull

        private ValueNull()
    • Method Detail

      • getSQL

        public java.lang.StringBuilder getSQL​(java.lang.StringBuilder builder,
                                              int sqlFlags)
        Description copied from interface: HasSQL
        Appends the SQL statement of this object to the specified builder.
        Parameters:
        builder - string builder
        sqlFlags - formatting flags
        Returns:
        the specified string builder
      • getType

        public TypeInfo getType()
        Description copied from interface: Typed
        Returns the data type.
        Specified by:
        getType in interface Typed
        Specified by:
        getType in class Value
        Returns:
        the data type
      • getValueType

        public int getValueType()
        Description copied from class: Value
        Get the value type.
        Specified by:
        getValueType in class Value
        Returns:
        the value type
      • getMemory

        public int getMemory()
        Description copied from class: Value
        Get the memory used by this object.
        Overrides:
        getMemory in class Value
        Returns:
        the memory used in bytes
      • getString

        public java.lang.String getString()
        Description copied from class: Value
        Get the value as a string.
        Specified by:
        getString in class Value
        Returns:
        the string
      • getReader

        public java.io.Reader getReader()
        Overrides:
        getReader in class Value
      • getReader

        public java.io.Reader getReader​(long oneBasedOffset,
                                        long length)
        Description copied from class: Value
        Get the reader
        Overrides:
        getReader in class Value
        Parameters:
        oneBasedOffset - the offset (1 means no offset)
        length - the requested length
        Returns:
        the new reader
      • getBytes

        public byte[] getBytes()
        Overrides:
        getBytes in class Value
      • getInputStream

        public java.io.InputStream getInputStream()
        Overrides:
        getInputStream in class Value
      • getInputStream

        public java.io.InputStream getInputStream​(long oneBasedOffset,
                                                  long length)
        Description copied from class: Value
        Get the input stream
        Overrides:
        getInputStream in class Value
        Parameters:
        oneBasedOffset - the offset (1 means no offset)
        length - the requested length
        Returns:
        the new input stream
      • getByte

        public byte getByte()
        Description copied from class: Value
        Returns this value as a Java byte value.
        Overrides:
        getByte in class Value
        Returns:
        value
      • getShort

        public short getShort()
        Description copied from class: Value
        Returns this value as a Java short value.
        Overrides:
        getShort in class Value
        Returns:
        value
      • getInt

        public int getInt()
        Description copied from class: Value
        Returns this value as a Java int value.
        Overrides:
        getInt in class Value
        Returns:
        value
      • getLong

        public long getLong()
        Description copied from class: Value
        Returns this value as a Java long value.
        Overrides:
        getLong in class Value
        Returns:
        value
      • getBigDecimal

        public java.math.BigDecimal getBigDecimal()
        Overrides:
        getBigDecimal in class Value
      • getFloat

        public float getFloat()
        Description copied from class: Value
        Returns this value as a Java float value.
        Overrides:
        getFloat in class Value
        Returns:
        value
      • getDouble

        public double getDouble()
        Description copied from class: Value
        Returns this value as a Java double value.
        Overrides:
        getDouble in class Value
        Returns:
        value
      • compareTypeSafe

        public int compareTypeSafe​(Value v,
                                   CompareMode mode,
                                   CastDataProvider provider)
        Description copied from class: Value
        Compare this value against another value given that the values are of the same data type.
        Specified by:
        compareTypeSafe in class Value
        Parameters:
        v - the other value
        mode - the compare mode
        provider - the cast information provider
        Returns:
        0 if both values are equal, -1 if the other value is smaller, and 1 otherwise
      • containsNull

        public boolean containsNull()
        Description copied from class: Value
        Returns true if this value is NULL or contains NULL value.
        Overrides:
        containsNull in class Value
        Returns:
        true if this value is NULL or contains NULL value
      • hashCode

        public int hashCode()
        Specified by:
        hashCode in class Value
      • equals

        public boolean equals​(java.lang.Object other)
        Description copied from class: Value
        Check if the two values have the same hash code. No data conversion is made; this method returns false if the other object is not of the same class. For some values, compareTo may return 0 even if equals return false. Example: ValueDecimal 0.0 and 0.00.
        Specified by:
        equals in class Value
        Parameters:
        other - the other value
        Returns:
        true if they are equal