TransformAttribute (Java Platform SE 7 )
Keywords: java.awt.font.TransformAttribute class

java.awt.font

## Class TransformAttribute

- java.lang.Object
- - java.awt.font.TransformAttribute

- All Implemented Interfaces:
    Serializable

      public final class TransformAttribute
      extends Object
      implements Serializable

  The `TransformAttribute` class provides an immutable wrapper for a transform so that it is safe to use as an attribute.
  See Also:
    Serialized Form

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static TransformAttribute` | `IDENTITY` A `TransformAttribute` representing the identity transform.

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `TransformAttribute(AffineTransform transform)` Wraps the specified transform.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `equals(Object rhs)` Returns `true` if rhs is a `TransformAttribute` whose transform is equal to this `TransformAttribute`'s transform.
    `AffineTransform` | `getTransform()` Returns a copy of the wrapped transform.
    `int` | `hashCode()` Returns a hash code value for the object.
    `boolean` | `isIdentity()` Returns `true` if the wrapped transform is an identity transform.

    - ### Methods inherited from class java.lang.Object

      `clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### IDENTITY

          public static final TransformAttribute IDENTITY

      A `TransformAttribute` representing the identity transform.
      Since:
        1.6

  - ### Constructor Detail

    - #### TransformAttribute

          public TransformAttribute(AffineTransform transform)

      Wraps the specified transform. The transform is cloned and a reference to the clone is kept. The original transform is unchanged. If null is passed as the argument, this constructor behaves as though it were the identity transform. (Note that it is preferable to use `IDENTITY` in this case.)
      Parameters:
        `transform` - the specified `AffineTransform` to be wrapped, or null.

  - ### Method Detail

    - #### getTransform

          public AffineTransform getTransform()

      Returns a copy of the wrapped transform.
      Returns:
        a `AffineTransform` that is a copy of the wrapped transform of this `TransformAttribute`.

    - #### isIdentity

          public boolean isIdentity()

      Returns `true` if the wrapped transform is an identity transform.
      Returns:
        `true` if the wrapped transform is an identity transform; `false` otherwise.
      Since:
        1.4

    - #### hashCode

          public int hashCode()

      Description copied from class: `Object`
      Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by `HashMap`.

      The general contract of `hashCode` is:

      - Whenever it is invoked on the same object more than once during an execution of a Java application, the `hashCode` method must consistently return the same integer, provided no information used in `equals` comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
      - If two objects are equal according to the `equals(Object)` method, then calling the `hashCode` method on each of the two objects must produce the same integer result.
      - It is not required that if two objects are unequal according to the `Object.equals(java.lang.Object)` method, then calling the `hashCode` method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

      As much as is reasonably practical, the hashCode method defined by class `Object` does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the JavaTM programming language.)

      Overrides:
        `hashCode` in class `Object`
      Returns:
        a hash code value for this object.
      Since:
        1.6
      See Also:
        `Object.equals(java.lang.Object)`, `System.identityHashCode(java.lang.Object)`

    - #### equals

          public boolean equals(Object rhs)

      Returns `true` if rhs is a `TransformAttribute` whose transform is equal to this `TransformAttribute`'s transform.
      Overrides:
        `equals` in class `Object`
      Parameters:
        `rhs` - the object to compare to
      Returns:
        `true` if the argument is a `TransformAttribute` whose transform is equal to this `TransformAttribute`'s transform.
      Since:
        1.6
      See Also:
        `Object.hashCode()`, `HashMap`

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