Function

java.lang.Object
- com.orsonpdf.PDFObject
- - com.orsonpdf.Function

Direct Known Subclasses:

ExponentialInterpolationFunction, StitchingFunction
```
public abstract class Function
extends PDFObject
```
A PDF function object. For the PDFGraphics2D class, only EXPONENTIAL_INTERPOLATION and STITCHING are used so far (to support gradient paint implementations).

Field Summary

Fields
Modifier and Type	Field	Description
`protected Dictionary`	`dictionary`	The function dictionary.
`private double[]`	`domain`	The function domain.
`private FunctionType`	`functionType`	The function type.

Constructor Summary

Constructors
Modifier Constructor Description

protected Function(int number, FunctionType functionType)
Creates a new function.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`double[]`	`getDomain()`	Returns the function domain.
`FunctionType`	`getFunctionType()`	Returns the function type.
`byte[]`	`getObjectBytes()`	Returns the bytes that go between the 'obj' and 'endobj' in the PDF output for this object.
`void`	`setDomain(double[] domain)`	Sets the domain for the function.

Methods inherited from class com.orsonpdf.PDFObject
getGeneration, getNumber, getReference, toPDFBytes

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

- Field Detail
  - functionType
```
private FunctionType functionType
```
    The function type.
  - domain
```
private double[] domain
```
    The function domain.
  - dictionary
```
protected Dictionary dictionary
```
    The function dictionary.
- Constructor Detail
  - Function
```
protected Function(int number,
                   FunctionType functionType)
```
    Creates a new function.
    
    Parameters:
    
    number - the PDF object number.
    
    functionType - the function type (null not permitted).
- Method Detail
  - getFunctionType
```
public FunctionType getFunctionType()
```
    Returns the function type.
    
    Returns:
    
    The function type (never null).
  - getDomain
```
public double[] getDomain()
```
    Returns the function domain.
    
    Returns:
    
    The function domain (never null).
  - setDomain
```
public void setDomain(double[] domain)
```
    Sets the domain for the function.
    
    Parameters:
    
    domain - the domain (null not permitted).
  - getObjectBytes
```
public byte[] getObjectBytes()
```
    Returns the bytes that go between the 'obj' and 'endobj' in the PDF output for this object.
    
    Specified by:
    
    getObjectBytes in class PDFObject
    
    Returns:
    
    A byte array.