org.das2.util

Class OsUtil

java.lang.Object

org.das2.util.OsUtil

public class OsUtil
extends java.lang.Object

Utility methods for operating system functions.

See Also:

FileSystemUtil

Constructor Summary

Constructors

Constructor and Description
OsUtil()

Method Summary

Modifier and Type	Method and Description
static void	closeQuietly(java.io.InputStream input) Unconditionally close an Reader.
static boolean	contentEquals(java.io.File file1, java.io.File file2) Compare the contents of two files to determine if they are equal or not.
static boolean	contentEquals(java.io.InputStream input1, java.io.InputStream input2) Compare the contents of two Streams to determine if they are equal or not.
static java.lang.String	getProcessId(java.lang.String fallback) return the processID (pid), or the fallback if the pid cannot be found.

Methods inherited from class java.lang.Object

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

Constructor Detail

OsUtil

public OsUtil()

Method Detail

getProcessId

public static java.lang.String getProcessId(java.lang.String fallback)

return the processID (pid), or the fallback if the pid cannot be found.

Parameters:

fallback - the string (null is okay) to return when the pid cannot be found.

Returns:

the process id or the fallback provided by the caller.

closeQuietly

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

Unconditionally close an Reader.

Equivalent to Reader.close(), except any exceptions will be ignored. This is typically used in finally blocks. From apache commons. http://grepcode.com/file_/repo1.maven.org/maven2/commons-io/commons-io/1.2/org/apache/commons/io/IOUtils.java/?v=source

Parameters:

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

contentEquals

public static boolean contentEquals(java.io.InputStream input1,
                                    java.io.InputStream input2)
                             throws java.io.IOException

Compare the contents of two Streams to determine if they are equal or not.

This method buffers the input internally using BufferedInputStream if they are not already buffered.

Parameters:

input1 - the first stream

input2 - the second stream

Returns:

true if the content of the streams are equal or they both don't exist, false otherwise

Throws:

java.lang.NullPointerException - if either input is null

java.io.IOException - if an I/O error occurs From Apache Commons http://grepcode.com/file_/repo1.maven.org/maven2/commons-io/commons-io/1.2/org/apache/commons/io/IOUtils.java/?v=source

contentEquals

public static boolean contentEquals(java.io.File file1,
                                    java.io.File file2)
                             throws java.io.IOException

Compare the contents of two files to determine if they are equal or not.

This method checks to see if the two files are different lengths or if they point to the same file, before resorting to byte-by-byte comparison of the contents.

Code origin: Avalon

Parameters:

file1 - the first file

file2 - the second file

Returns:

true if the content of the files are equal or they both don't exist, false otherwise

Throws:

java.io.IOException - in case of an I/O error From Apache Commons http://grepcode.com/file/repo1.maven.org/maven2/commons-io/commons-io/1.2/org/apache/commons/io/FileUtils.java