Package org.jfree.data

Class DefaultKeyedValueDataset

java.lang.Object
org.jfree.data.AbstractDataset
org.jfree.data.DefaultKeyedValueDataset
All Implemented Interfaces:
ObjectInputValidation, Serializable, Cloneable, Dataset, KeyedValue, KeyedValueDataset, Value
public class DefaultKeyedValueDataset
extends AbstractDataset
implements KeyedValueDataset, Serializable
A default implementation of the KeyedValueDataset interface.
See Also:
Serialized Form

  • Constructor Details

    • DefaultKeyedValueDataset

      public DefaultKeyedValueDataset()
      Constructs a new dataset, initially empty.

    • DefaultKeyedValueDataset

      public DefaultKeyedValueDataset​(Comparable key, Number value)
      Creates a new dataset with the specified initial value.
      Parameters:
      key - the key.
      value - the value (null permitted).

    • DefaultKeyedValueDataset

      public DefaultKeyedValueDataset​(KeyedValue data)
      Creates a new dataset that uses the data from a KeyedValue instance.
      Parameters:
      data - the data (null permitted).

  • Method Details

    • getKey

      public Comparable getKey()
      Returns the key associated with the value, or null if the dataset has no data item.
      Specified by:
      getKey in interface KeyedValue
      Returns:
      the key.

    • getValue

      public Number getValue()
      Returns the value.
      Specified by:
      getValue in interface Value
      Returns:
      the value (possibly null).

    • updateValue

      public void updateValue​(Number value)
      Updates the value.
      Parameters:
      value - the new value (null permitted).

    • setValue

      public void setValue​(Comparable key, Number value)
      Sets the value for the dataset and sends a DatasetChangeEvent to all registered listeners.
      Parameters:
      key - the key.
      value - the value (null permitted).

    • equals

      public boolean equals​(Object obj)
      Tests this dataset for equality with an arbitrary object.
      Overrides:
      equals in class Object
      Parameters:
      obj - the object.
      Returns:
      A boolean.

    • hashCode

      public int hashCode()
      Returns a hash code.
      Overrides:
      hashCode in class Object
      Returns:
      a hash code.

    • clone

      public Object clone() throws CloneNotSupportedException
      Creates a clone of the dataset.
      Overrides:
      clone in class AbstractDataset
      Returns:
      A clone.
      Throws:
      CloneNotSupportedException - This class will not throw this exception, but subclasses (if any) might.