CRCUtil

java.lang.Object
- com.inductiveautomation.ignition.common.util.CRCUtil

public class CRCUtil
extends java.lang.Object

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static interface CRCUtil.HashCoder<T>

Constructor Summary

Constructors
Constructor Description

CRCUtil()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static long`	`calcCRC(byte[] arr)`	Calculates a CRC for the byte array.
`static long`	`calcCRC(java.io.File file)`	Calculates the CRC of a file.
`static <T> long`	`crc(java.util.Collection<T> items)`	This is a convenience method that will use whatever T.hashCode() happens to be as the hash code.
`static <T> long`	`crc(java.util.Collection<T> items, CRCUtil.HashCoder<T> hashCoder)`	Calculates a reliably unique code for a given Collection<T> that is indifferent to the collections lack of order.

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

- Constructor Detail
  - CRCUtil
```
public CRCUtil()
```
- Method Detail
  - calcCRC
```
public static long calcCRC(byte[] arr)
```
    Calculates a CRC for the byte array. If the array is null or has length==0, returns 0.
  - calcCRC
```
public static long calcCRC(java.io.File file)
                    throws java.io.IOException
```
    Calculates the CRC of a file. Avoids loading the whole file into memory
    
    Throws:
    
    java.io.IOException
  - crc
```
public static <T> long crc(java.util.Collection<T> items)
```
    This is a convenience method that will use whatever T.hashCode() happens to be as the hash code.
    
    See Also:
    
    crc(Collection, HashCoder)
  - crc
```
public static <T> long crc(java.util.Collection<T> items,
                           CRCUtil.HashCoder<T> hashCoder)
```
    Calculates a reliably unique code for a given Collection<T> that is indifferent to the collections lack of order.
    
    Parameters:
    
    items - The Collection<T> you want a CRC for.
    
    hashCoder - The HashCoder that provides a hashCode for an object of T.
    
    Returns:
    
    A CRC for the given Collection<T>.