com.oracle.svm.core.jdk

Class SystemPropertiesSupport

java.lang.Object

com.oracle.svm.core.jdk.SystemPropertiesSupport

Direct Known Subclasses:

PosixSystemPropertiesSupport, WindowsSystemPropertiesSupport

public abstract class SystemPropertiesSupport
extends Object

This class maintains the system properties at run time. Some of the standard system properties can just be taken from the image generator: SystemPropertiesSupport.HOSTED_PROPERTIES. Other important system properties need to be computed at run time. However, we want to do the computation lazily to reduce the startup cost. For example, getting the current working directory is quite expensive. We initialize such a property either when it is explicitly accessed, or when all properties are accessed.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SystemPropertiesSupport()

Method Summary

Modifier and Type	Method and Description
String	clearProperty(String key)
Properties	getProperties()
protected String	getProperty(String key)
protected abstract String	osVersionValue()
String	setProperty(String key, String value)
protected abstract String	tmpdirValue()
protected abstract String	userDirValue()
protected abstract String	userHomeValue()
protected abstract String	userNameValue()

Methods inherited from class java.lang.Object

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

Constructor Detail

SystemPropertiesSupport

protected SystemPropertiesSupport()

Method Detail

getProperties

public Properties getProperties()

getProperty

protected String getProperty(String key)

setProperty

public String setProperty(String key,
                          String value)

clearProperty

public String clearProperty(String key)

userNameValue

protected abstract String userNameValue()

userHomeValue

protected abstract String userHomeValue()

userDirValue

protected abstract String userDirValue()

tmpdirValue

protected abstract String tmpdirValue()

osVersionValue

protected abstract String osVersionValue()