com.googlecode.flyway.core.util
Class CalculateChecksum

java.lang.Object
  com.googlecode.flyway.core.util.CalculateChecksum

public class CalculateChecksum
extends java.lang.Object

Calculates checksum for sql migrations.

Method Summary

static long	checksum(java.lang.String location) Computes the checksum of a classpath resource using.
static java.util.zip.Checksum	checksum(java.lang.String location, java.util.zip.Checksum checksum) Computes the checksum of a classpath resource using the specified checksum object.
static void	closeQuietly(java.io.InputStream input) Unconditionally close an InputStream.
static long	copyLarge(java.io.InputStream input, java.io.OutputStream output) Copy bytes from a large (over 2GB) InputStream to an OutputStream.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

checksum

public static long checksum(java.lang.String location)
                     throws java.io.IOException

Computes the checksum of a classpath resource using.

Parameters:

location - The location of the resource on the classpath.

Returns:

the calculated checksum

Throws:

java.io.IOException - if an IO error occurs reading the resource

checksum

public static java.util.zip.Checksum checksum(java.lang.String location,
                                              java.util.zip.Checksum checksum)
                                       throws java.io.IOException

Computes the checksum of a classpath resource using the specified checksum object.

Parameters:

location - The location of the resource on the classpath.

checksum - the checksum object to be used, must not be null

Returns:

the checksum specified, updated with the content of the file

Throws:

java.io.IOException - if an IO error occurs reading the resource

copyLarge

public static long copyLarge(java.io.InputStream input,
                             java.io.OutputStream output)
                      throws java.io.IOException

Copy bytes from a large (over 2GB) InputStream to an OutputStream.

This method buffers the input internally, so there is no need to use a BufferedInputStream.

Parameters:

input - the InputStream to read from

output - the OutputStream to write to

Returns:

the number of bytes copied

Throws:

java.lang.NullPointerException - if the input or output is null

java.io.IOException - if an I/O error occurs

Since:

Commons IO 1.3

closeQuietly

public static void closeQuietly(java.io.InputStream input)

Unconditionally close an InputStream.

Equivalent to InputStream.close(), except any exceptions will be ignored. This is typically used in finally blocks.

Parameters:

input - the InputStream to close, may be null or already closed