prefuse.util
Class PrefuseConfig

java.lang.Object
  java.util.Dictionary<K,V>
      java.util.Hashtable<java.lang.Object,java.lang.Object>
          java.util.Properties
              prefuse.util.PrefuseConfig

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.Map<java.lang.Object,java.lang.Object>

public class PrefuseConfig
extends java.util.Properties

Runtime configuration settings for the prefuse framework. Maintains a set of hardwired configuration settings that can be overrriden by creating a text proeprties file containing custom values. By default, prefuse will look for the file "prefuse.conf" in the current working directory for configuration name/value pairs. The framework can be instructed to look for a different file by putting the full path to the file into the "prefuse.config" System property (for example by using a -D flag at the Java runtime command line).

Some of the supported configuration properties include:

• activity.threadPriority - the thread priority of the ActivityManager thread. The value should be between 1 and 10, with 5 being the standard Java default. The default prefuse setting is 6.
• data.io.worker.threadPriority - the thread priority of asynchronous database worker threads. The default prefuse setting is 5 (same as the Java thread default).
• data.filter.optimizeThreshold - the minimum number of items that must be contained in a table for optimized query plans to be considered. The default value is 300.
• util.logdir - the directory in which to write prefuse log files. The default is "null" which defaults logging output to standard output.
• util.logfile - the filename pattern to use for naming prefuse log files. The default is "prefuse_log_%g.txt", where the %g indicates a unique number for the log file.

Application creators are welcome to add their own custom properties to the configuration files and use the PrefuseConfig instance to access those properties. This class is a singleton, accessed through a static accessor method.

Author:

jeffrey heer

See Also:

Serialized Form

Field Summary

Fields inherited from class java.util.Properties

defaults

Method Summary

static java.lang.String	get(java.lang.String key) Get a prefuse configuration property.
static boolean	getBoolean(java.lang.String key) Get a prefuse configuration property as a boolean.
static PrefuseConfig	getConfig() Get the global PrefuseConfig instance.
static double	getDouble(java.lang.String key) Get a prefuse configuration property as a double.
static float	getFloat(java.lang.String key) Get a prefuse configuration property as a float.
static int	getInt(java.lang.String key) Get a prefuse configuration property as an integer.
static long	getLong(java.lang.String key) Get a prefuse configuration property as a long.

Methods inherited from class java.util.Properties

getProperty, getProperty, list, list, load, load, loadFromXML, propertyNames, save, setProperty, store, store, storeToXML, storeToXML, stringPropertyNames

Methods inherited from class java.util.Hashtable

clear, clone, contains, containsKey, containsValue, elements, entrySet, equals, get, hashCode, isEmpty, keys, keySet, put, putAll, rehash, remove, size, toString, values

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

getConfig

public static PrefuseConfig getConfig()

Get the global PrefuseConfig instance.

Returns:

the configuration instance

get

public static java.lang.String get(java.lang.String key)

Get a prefuse configuration property.

Parameters:

key - the name of the property to lookup

Returns:

the property value, or null if the key is not found

getInt

public static int getInt(java.lang.String key)

Get a prefuse configuration property as an integer.

Parameters:

key - the name of the property to lookup

Returns:

the property value, or the minimum possible integer value if the key is not found or parsing of the number fails.

getLong

public static long getLong(java.lang.String key)

Get a prefuse configuration property as a long.

Parameters:

key - the name of the property to lookup

Returns:

the property value, or the minimum possible long value if the key is not found or parsing of the number fails.

getFloat

public static float getFloat(java.lang.String key)

Get a prefuse configuration property as a float.

Parameters:

key - the name of the property to lookup

Returns:

the property value, or a Float.NaN value if the key is not found or parsing of the number fails.

getDouble

public static double getDouble(java.lang.String key)

Get a prefuse configuration property as a double.

Parameters:

key - the name of the property to lookup

Returns:

the property value, or a Double.NaN value if the key is not found or parsing of the number fails.

getBoolean

public static boolean getBoolean(java.lang.String key)

Get a prefuse configuration property as a boolean.

Parameters:

key - the name of the property to lookup

Returns:

the property value. False is returned if the key is not found or does not parse to a true/false value.