Package net.quasardb.qdb.ts

Class Value

java.lang.Object
net.quasardb.qdb.ts.Value
All Implemented Interfaces:
Serializable, Comparable<Value>
public class Value extends Object implements Serializable, Comparable<Value>
Represents a timeseries value.
See Also:

  • Constructor Details

    • Value

      public Value()

    • Value

      protected Value(Value.Type type)

    • Value

      public Value(Value value)
      Creates new value out of this value, that is, copies the underlying value.

  • Method Details

    • createNull

      public static Value createNull()
      Create a null / empty value.

    • setNative

      public void setNative(long batchTable, Value.Type columnType, int offset)

    • setNull

      public void setNull()
      Updates value to represent an unintialised value.

    • isNull

      public boolean isNull()
      Returns true if this value is null.

    • createInt64

      public static Value createInt64(long value)
      Represents a long integer

    • setInt64

      public void setInt64(long value)
      Updates value to take a certain long integer value;

    • createDouble

      public static Value createDouble(double value)
      Represents a double value.

    • setDouble

      public void setDouble(double value)
      Updates value to take a certain double value;

    • createTimestamp

      public static Value createTimestamp(Timespec value)
      Represents a timestamp

    • setTimestamp

      public void setTimestamp(Timespec value)
      Updates value to take a certain timestamp;

    • createBlob

      public static Value createBlob(byte[] value)
      Represents a blob value. Warning: assumes byte array will stay in memory for as long as this object lives.

    • createBlob

      public static Value createBlob(ByteBuffer value)
      Represents blob value. Warning: assumes bytebuffer will stay in memory for as long as this object lives.

    • setBlob

      public void setBlob(byte[] value)
      Updates value to take a certain blob value. Warning: assumes byte array will stay in memory for as long as this object lives.

    • setBlob

      public void setBlob(ByteBuffer value)
      Updates value to take a certain blob value;

    • setSafeBlob

      public void setSafeBlob(byte[] value)
      Updates value to take a certain blob value. Will create a copy of the byte array.

    • setSafeBlob

      public void setSafeBlob(ByteBuffer value)
      Updates value to take a certain blob value. Will create copy of the byte array.

    • createSafeBlob

      public static Value createSafeBlob(byte[] value)
      Represents a safe blob value that copies the byte array.

    • createSafeBlob

      public static Value createSafeBlob(ByteBuffer value)
      Creates a copy of a ByteBuffer into this Value.

    • setString

      public void setString(String value)
      Update this value to be a String.

    • createString

      public static Value createString(String value)
      Create a new String value.
      Parameters:
      value - String representation of value.

    • ensureByteBufferBackedString

      public Value ensureByteBufferBackedString()
      If this Value's type is a string, ensures that it creates a directly allocated ByteBuffer with a copy of the UTF-8 string representation. Because this implies that the String is then represented as a direct ByteBuffer with a 'stable' memory region behind it, it'll allow us to use this buffer in native code safely for extended periods of time without requiring a copy.
      Returns:
      Returns this value.

    • equals

      public boolean equals(Object obj)
      Overrides:
      equals in class Object

    • compareTo

      public int compareTo(Value rhs)
      Specified by:
      compareTo in interface Comparable<Value>

    • getType

      public Value.Type getType()

    • getInt64

      public long getInt64()

    • getDouble

      public double getDouble()

    • getTimestamp

      public Timespec getTimestamp()

    • getBlob

      public ByteBuffer getBlob()

    • getString

      public String getString()

    • toString

      public String toString()
      Overrides:
      toString in class Object