FitsUtil (FITS API)

java.lang.Object
- nom.tam.fits.FitsUtil

```
public final class FitsUtil
extends java.lang.Object
```
This class comprises static utility functions used throughout the FITS classes.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static int`	`addPadding(int size)`
`static long`	`addPadding(long size)`
`static java.lang.String[]`	`byteArrayToStrings(byte[] bytes, int maxLen)`
`static long`	`findOffset(java.io.Closeable o)`
`static java.io.InputStream`	`getURLStream(java.net.URL url, int level)`
`static int`	`maxLength(java.lang.String[] strings)`
`static void`	`pad(ArrayDataOutput stream, long size)` Add padding to an output stream.
`static void`	`pad(ArrayDataOutput stream, long size, byte fill)` Add padding to an output stream.
`static int`	`padding(int size)`
`static int`	`padding(long size)`
`static void`	`reposition(java.io.Closeable o, long offset)` Reposition a random access stream to a requested offset.
`static byte[]`	`stringsToByteArray(java.lang.String[] stringArray, int maxLen)` Convert an array of Strings to bytes.

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

- Method Detail
  - addPadding
```
public static int addPadding(int size)
```
    Parameters:
    
    size - the current size.
    
    Returns:
    
    Total size of blocked FITS element, using e.v. padding to fits block size.
  - addPadding
```
public static long addPadding(long size)
```
    Parameters:
    
    size - the current size.
    
    Returns:
    
    Total size of blocked FITS element, using e.v. padding to fits block size.
  - byteArrayToStrings
```
public static java.lang.String[] byteArrayToStrings(byte[] bytes,
                                                    int maxLen)
```
    Parameters:
    
    bytes - byte array to convert
    
    maxLen - the max string length
    
    Returns:
    
    Convert bytes to Strings.
  - findOffset
```
public static long findOffset(java.io.Closeable o)
```
    Parameters:
    
    o - the stream to get the position
    
    Returns:
    
    Find out where we are in a random access file .
  - getURLStream
```
public static java.io.InputStream getURLStream(java.net.URL url,
                                               int level)
                                        throws java.io.IOException
```
    Parameters:
    
    url - the url to get the stream from
    
    level - max levels of redirection
    
    Returns:
    
    Get a stream to a URL accommodating possible redirections. Note that if a redirection request points to a different protocol than the original request, then the redirection is not handled automatically.
    
    Throws:
    
    java.io.IOException - if the operation failed
  - maxLength
```
public static int maxLength(java.lang.String[] strings)
                     throws FitsException
```
    Parameters:
    
    strings - array of strings to check
    
    Returns:
    
    Get the maximum length of a String in a String array.
    
    Throws:
    
    FitsException - if the operation failed
  - pad
```
public static void pad(ArrayDataOutput stream,
                       long size)
                throws FitsException
```
    Add padding to an output stream.
    
    Parameters:
    
    stream - stream to pad
    
    size - the current size
    
    Throws:
    
    FitsException - if the operation failed
  - pad
```
public static void pad(ArrayDataOutput stream,
                       long size,
                       byte fill)
                throws FitsException
```
    Add padding to an output stream.
    
    Parameters:
    
    stream - stream to pad
    
    size - the current size
    
    fill - the fill byte to use
    
    Throws:
    
    FitsException - if the operation failed
  - padding
```
public static int padding(int size)
```
    Parameters:
    
    size - the size without padding
    
    Returns:
    
    How many bytes are needed to fill a 2880 block?
  - padding
```
public static int padding(long size)
```
  - reposition
```
public static void reposition(java.io.Closeable o,
                              long offset)
                       throws FitsException
```
    Reposition a random access stream to a requested offset.
    
    Parameters:
    
    o - the closable to reposition
    
    offset - the offset to position it to.
    
    Throws:
    
    FitsException - if the operation was failed or not possible
  - stringsToByteArray
```
public static byte[] stringsToByteArray(java.lang.String[] stringArray,
                                        int maxLen)
```
    Convert an array of Strings to bytes.
    
    Parameters:
    
    stringArray - the array with Strings
    
    maxLen - the max length (in bytes) of every String
    
    Returns:
    
    the resulting bytes

Class FitsUtil

Method Summary

Methods inherited from class java.lang.Object

Method Detail

addPadding

addPadding

byteArrayToStrings

findOffset

getURLStream

maxLength

pad

pad

padding

padding

reposition

stringsToByteArray