## org.jfree.chart.labels
Class AbstractCategoryItemLabelGenerator

    java.lang.Object
      org.jfree.chart.labels.AbstractCategoryItemLabelGenerator

All Implemented Interfaces:
  java.io.Serializable, java.lang.Cloneable, org.jfree.util.PublicCloneable

Direct Known Subclasses:
  StandardCategoryLabelGenerator, StandardCategoryToolTipGenerator

    public abstract class AbstractCategoryItemLabelGenerator

extends java.lang.Object
implements org.jfree.util.PublicCloneable, java.lang.Cloneable, java.io.Serializable

A base class that can be used to create a label or tooltip generator that can be assigned to a `CategoryItemRenderer`.

See Also:
  Serialized Form

Constructor Summary
`protected` `AbstractCategoryItemLabelGenerator(java.lang.String labelFormat, java.text.DateFormat formatter)` Creates a label generator with the specified date formatter.
`protected` `AbstractCategoryItemLabelGenerator(java.lang.String labelFormat, java.text.NumberFormat formatter)` Creates a label generator with the specified number formatter.

Method Summary
`java.lang.Object` `clone()` Returns an independent copy of the generator.
`protected java.lang.Object[]` `createItemArray(CategoryDataset dataset, int row, int column)` Creates the array of items that can be passed to the `MessageFormat` class for creating labels.
`boolean` `equals(java.lang.Object obj)` Tests this object for equality with an arbitrary object.
`java.lang.String` `generateColumnLabel(CategoryDataset dataset, int column)` Generates a label for the specified row.
`protected java.lang.String` `generateLabelString(CategoryDataset dataset, int row, int column)` Generates a for the specified item.
`java.lang.String` `generateRowLabel(CategoryDataset dataset, int row)` Generates a label for the specified row.
`java.text.DateFormat` `getDateFormat()` Returns the date formatter.
`java.lang.String` `getLabelFormat()` Returns the label format string.
`java.text.NumberFormat` `getNumberFormat()` Returns the number formatter.

Methods inherited from class java.lang.Object
`finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### AbstractCategoryItemLabelGenerator

    protected AbstractCategoryItemLabelGenerator(java.lang.String labelFormat,
                                                 java.text.NumberFormat formatter)

  Creates a label generator with the specified number formatter.

  Parameters:
    `labelFormat` - the label format string (`null` not permitted).
    `formatter` - the number formatter (`null` not permitted).

### AbstractCategoryItemLabelGenerator

    protected AbstractCategoryItemLabelGenerator(java.lang.String labelFormat,
                                                 java.text.DateFormat formatter)

  Creates a label generator with the specified date formatter.

  Parameters:
    `labelFormat` - the label format string (`null` not permitted).
    `formatter` - the date formatter (`null` not permitted).

Method Detail

### generateRowLabel

    public java.lang.String generateRowLabel(CategoryDataset dataset,
                                             int row)

  Generates a label for the specified row.

  Parameters:
    `dataset` - the dataset (`null` not permitted).
    `row` - the row index (zero-based).
  Returns:
    The label.

### generateColumnLabel

    public java.lang.String generateColumnLabel(CategoryDataset dataset,
                                                int column)

  Generates a label for the specified row.

  Parameters:
    `dataset` - the dataset (`null` not permitted).
    `column` - the column index (zero-based).
  Returns:
    The label.

### getLabelFormat

    public java.lang.String getLabelFormat()

  Returns the label format string.

  Returns:
    The label format string (never `null`).

### getNumberFormat

    public java.text.NumberFormat getNumberFormat()

  Returns the number formatter.

  Returns:
    The number formatter (possibly `null`).

### getDateFormat

    public java.text.DateFormat getDateFormat()

  Returns the date formatter.

  Returns:
    The date formatter (possibly `null`).

### generateLabelString

    protected java.lang.String generateLabelString(CategoryDataset dataset,
                                                   int row,
                                                   int column)

  Generates a for the specified item.

  Parameters:
    `dataset` - the dataset (`null` not permitted).
    `row` - the row index (zero-based).
    `column` - the column index (zero-based).
  Returns:
    The label (possibly `null`).

### createItemArray

    protected java.lang.Object[] createItemArray(CategoryDataset dataset,
                                                 int row,
                                                 int column)

  Creates the array of items that can be passed to the `MessageFormat` class for creating labels.

  Parameters:
    `dataset` - the dataset (`null` not permitted).
    `row` - the row index (zero-based).
    `column` - the column index (zero-based).
  Returns:
    The items (never `null`).

### equals

    public boolean equals(java.lang.Object obj)

  Tests this object for equality with an arbitrary object.

  Overrides:
    `equals` in class `java.lang.Object`
  Parameters:
    `obj` - the other object (`null` permitted).
  Returns:
    A boolean.

### clone

    public java.lang.Object clone()
                           throws java.lang.CloneNotSupportedException

  Returns an independent copy of the generator.

  Specified by:
    `clone` in interface `org.jfree.util.PublicCloneable`
  Overrides:
    `clone` in class `java.lang.Object`
  Returns:
    A clone.
  Throws:
    `java.lang.CloneNotSupportedException` - should not happen.