uk.ac.ed.inf.utils
Class PropertiesUtils

java.lang.Object
  uk.ac.ed.inf.utils.PropertiesUtils

public class PropertiesUtils
extends java.lang.Object

Utilities to manipulate Java properties and properties text files

Version:

4 Jan 2008

Author:

Luna De Ferrari luna.deferrari-at-ed.ac.uk

Constructor Summary

PropertiesUtils()

Method Summary

static void	getJavaSystemProperties() Gets the Java system properties
static java.util.Vector<java.lang.String>	getKeysStrings(java.util.Properties props) Get the properties keys as strings
static java.util.Vector<java.lang.String>	getValuesStrings(java.util.Properties props) Get the properties values as strings
static java.util.Properties	readLocalProperties(java.lang.String resourceName) Reads properties that inherit from three locations.
static java.util.Properties	readProperties(java.lang.String propertiesFilePath) Reads properties Code adapted from Weka: http://www.cs.waikato.ac.nz/ml/weka/ Ian H.

Methods inherited from class java.lang.Object

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

Constructor Detail

PropertiesUtils

public PropertiesUtils()

Method Detail

getJavaSystemProperties

public static void getJavaSystemProperties()

Gets the Java system properties

getKeysStrings

public static java.util.Vector<java.lang.String> getKeysStrings(java.util.Properties props)

Get the properties keys as strings

Parameters:

props - a properties object

Returns:

a vector with one string for each key in the properties

getValuesStrings

public static java.util.Vector<java.lang.String> getValuesStrings(java.util.Properties props)

Get the properties values as strings

Parameters:

props - a properties object

Returns:

a vector with the properties values as strings

readLocalProperties

public static java.util.Properties readLocalProperties(java.lang.String resourceName)
                                                throws java.lang.Exception

Reads properties that inherit from three locations. Code from Weka: http://www.cs.waikato.ac.nz/ml/weka/ Ian H. Witten and Eibe Frank (2005) "Data Mining: Practical machine learning tools and techniques", 2nd Edition, Morgan Kaufmann, San Francisco, 2005. Reads properties that inherit from three locations. Properties are first defined in the system resource location (i.e. in the CLASSPATH). These default properties must exist. Properties defined in the users home directory (optional) override default settings. Properties defined in the current directory (optional) override all these settings.

Parameters:

resourceName - the location of the resource that should be loaded. e.g.: "weka/core/Utils.props". (The use of hardcoded forward slashes here is OK - see jdk1.1/docs/guide/misc/resources.html) This routine will also look for the file (in this case) "Utils.props" in the users home directory and the current directory.

Returns:

the Properties

Throws:

java.lang.Exception - if no default properties are defined, or if an error occurs reading the properties files.

readProperties

public static java.util.Properties readProperties(java.lang.String propertiesFilePath)
                                           throws java.lang.Exception

Reads properties Code adapted from Weka: http://www.cs.waikato.ac.nz/ml/weka/ Ian H. Witten and Eibe Frank (2005) "Data Mining: Practical machine learning tools and techniques", 2nd Edition, Morgan Kaufmann, San Francisco, 2005.

Returns:

the Properties

Throws:

java.lang.Exception - if no default properties are defined, or if an error occurs reading the properties files.