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/*
* Copyright (C) 2012 United States Government as represented by the Administrator of the
* National Aeronautics and Space Administration.
* All Rights Reserved.
*/
package gov.nasa.worldwind;
import gov.nasa.worldwind.avlist.AVKey;
import gov.nasa.worldwind.geom.Angle;
import gov.nasa.worldwind.util.*;
import org.w3c.dom.*;
import com.jogamp.opengl.*;
import javax.xml.xpath.*;
import java.io.*;
import java.util.*;
import java.util.logging.Level;
/**
* This class manages the initial World Wind configuration. It reads World Wind configuration files and registers their
* contents. Configurations files contain the names of classes to create at run-time, the initial model definition,
* including the globe, elevation model and layers, and various control quantities such as cache sizes and data
* retrieval timeouts.
*
* The Configuration class is a singleton, but its instance is not exposed publicly. It is addressed only via static
* methods of the class. It is constructed upon first use of any of its static methods.
*
* When the Configuration class is first instantiated it reads the XML document config/worldwind.xml and
* registers all the information there. The information can subsequently be retrieved via the class' various
* getValue methods. Many World Wind start-up objects query this information to determine the classes to
* create. For example, the first World Wind object created by an application is typically a {@link
* gov.nasa.worldwind.awt.WorldWindowGLCanvas}. During construction that class causes World Wind's internal classes to
* be constructed, using the names of those classes drawn from the Configuration singleton, this class.
*
* The default World Wind configuration document is config/worldwind.xml. This can be changed by setting
* the Java property gov.nasa.worldwind.config.file to a different file name or a valid URL prior to
* creating any World Wind object or invoking any static methods of World Wind classes, including the Configuration
* class. When an application specifies a different configuration location it typically does so in its main method prior
* to using World Wind. If a file is specified its location must be on the classpath. (The contents of application and
* World Wind jar files are typically on the classpath, in which case the configuration file may be in the jar file.)
*
* Additionally, an application may set another Java property, gov.nasa.worldwind.app.config.document, to a
* file name or URL whose contents contain configuration values to override those of the primary configuration document.
* World Wind overrides only those values in this application document, it leaves all others to the value specified in
* the primary document. Applications usually specify an override document in order to specify the initial layers in the
* model.
*
* See config/worldwind.xml for documentation on setting configuration values.
*
* Configuration values can also be set programatically via {@link Configuration#setValue(String, Object)}, but they are
* not retroactive so affect only Configuration queries made subsequent to setting the value.
*
* Note: Prior to September of 2009, configuration properties were read from the file
* config/worldwind.properties. An alternate file could be specified via the
* gov.nasa.worldwind.config.file Java property. These mechanisms remain available but are deprecated.
* World Wind no longer contains a worldwind.properties file. If worldwind.properties or its
* replacement as specified through the Java property exists at run-time and can be found via the classpath,
* configuration values specified by that mechanism are given precedence over values specified by the new mechanism.
*
* @author Tom Gaskins
* @version $Id: Configuration.java 1739 2013-12-04 03:38:19Z dcollins $
*/
public class Configuration // Singleton
{
public static final String DEFAULT_LOGGER_NAME = "gov.nasa.worldwind";
private static final String CONFIG_PROPERTIES_FILE_NAME = "config/worldwind.properties";
private static final String CONFIG_FILE_PROPERTY_KEY = "gov.nasa.worldwind.config.file";
private static final String CONFIG_WW_DOCUMENT_KEY = "gov.nasa.worldwind.config.document";
private static final String CONFIG_WW_DOCUMENT_NAME = "config/worldwind.xml";
private static final String CONFIG_APP_DOCUMENT_KEY = "gov.nasa.worldwind.app.config.document";
private static Configuration ourInstance = new Configuration();
private static Configuration getInstance()
{
return ourInstance;
}
private final Properties properties;
private final ArrayList configDocs = new ArrayList();
/** Private constructor invoked only internally. */
private Configuration()
{
this.properties = initializeDefaults();
// Load the app's configuration if there is one
try
{
String appConfigLocation = System.getProperty(CONFIG_APP_DOCUMENT_KEY);
if (appConfigLocation != null)
this.loadConfigDoc(System.getProperty(CONFIG_APP_DOCUMENT_KEY)); // Load app's config first
}
catch (Exception e)
{
Logging.logger(DEFAULT_LOGGER_NAME).log(Level.WARNING, "Configuration.ConfigNotFound",
System.getProperty(CONFIG_APP_DOCUMENT_KEY));
// Don't stop if the app config file can't be found or parsed
}
try
{
// Load the default configuration
this.loadConfigDoc(System.getProperty(CONFIG_WW_DOCUMENT_KEY, CONFIG_WW_DOCUMENT_NAME));
// Load config properties, ensuring that the app's config takes precedence over wwj's
for (int i = this.configDocs.size() - 1; i >= 0; i--)
{
this.loadConfigProperties(this.configDocs.get(i));
}
}
catch (Exception e)
{
Logging.logger(DEFAULT_LOGGER_NAME).log(Level.WARNING, "Configuration.ConfigNotFound",
System.getProperty(CONFIG_WW_DOCUMENT_KEY));
}
// To support old-style configuration, read an existing config properties file and give the properties
// specified there precedence.
this.initializeCustom();
}
private void loadConfigDoc(String configLocation)
{
if (!WWUtil.isEmpty(configLocation))
{
Document doc = WWXML.openDocument(configLocation);
if (doc != null)
{
this.configDocs.add(doc);
// this.loadConfigProperties(doc);
}
}
}
private void insertConfigDoc(String configLocation)
{
if (!WWUtil.isEmpty(configLocation))
{
Document doc = WWXML.openDocument(configLocation);
if (doc != null)
{
this.configDocs.add(0, doc);
this.loadConfigProperties(doc);
}
}
}
private void loadConfigProperties(Document doc)
{
try
{
XPath xpath = WWXML.makeXPath();
NodeList nodes = (NodeList) xpath.evaluate("/WorldWindConfiguration/Property", doc, XPathConstants.NODESET);
if (nodes == null || nodes.getLength() == 0)
return;
for (int i = 0; i < nodes.getLength(); i++)
{
Node node = nodes.item(i);
String prop = xpath.evaluate("@name", node);
String value = xpath.evaluate("@value", node);
if (WWUtil.isEmpty(prop))// || WWUtil.isEmpty(value))
continue;
this.properties.setProperty(prop, value);
}
}
catch (XPathExpressionException e)
{
Logging.logger(DEFAULT_LOGGER_NAME).log(Level.WARNING, "XML.ParserConfigurationException");
}
}
private Properties initializeDefaults()
{
Properties defaults = new Properties();
java.util.TimeZone tz = java.util.Calendar.getInstance().getTimeZone();
if (tz != null)
defaults.setProperty(AVKey.INITIAL_LONGITUDE,
Double.toString(
Angle.fromDegrees(180.0 * tz.getOffset(System.currentTimeMillis()) / (12.0 * 3.6e6)).degrees));
return defaults;
}
private void initializeCustom()
{
// IMPORTANT NOTE: Always use the single argument version of Logging.logger in this method because the non-arg
// method assumes an instance of Configuration already exists.
String configFileName = System.getProperty(CONFIG_FILE_PROPERTY_KEY, CONFIG_PROPERTIES_FILE_NAME);
try
{
java.io.InputStream propsStream = null;
File file = new File(configFileName);
if (file.exists())
{
try
{
propsStream = new FileInputStream(file);
}
catch (FileNotFoundException e)
{
Logging.logger(DEFAULT_LOGGER_NAME).log(Level.FINEST, "Configuration.LocalConfigFileNotFound",
configFileName);
}
}
if (propsStream == null)
{
propsStream = this.getClass().getResourceAsStream("/" + configFileName);
}
if (propsStream != null)
this.properties.load(propsStream);
}
// Use a named logger in all the catch statements below to prevent Logger from calling back into
// Configuration when this Configuration instance is not yet fully instantiated.
catch (IOException e)
{
Logging.logger(DEFAULT_LOGGER_NAME).log(Level.SEVERE, "Configuration.ExceptionReadingPropsFile", e);
}
}
public static void insertConfigurationDocument(String fileName)
{
getInstance().insertConfigDoc(fileName);
}
/**
* Return as a string the value associated with a specified key.
*
* @param key the key for the desired value.
* @param defaultValue the value to return if the key does not exist.
*
* @return the value associated with the key, or the specified default value if the key does not exist.
*/
public static synchronized String getStringValue(String key, String defaultValue)
{
String v = getStringValue(key);
return v != null ? v : defaultValue;
}
/**
* Return as a string the value associated with a specified key.
*
* @param key the key for the desired value.
*
* @return the value associated with the key, or null if the key does not exist.
*/
public static synchronized String getStringValue(String key)
{
Object o = getInstance().properties.getProperty(key);
return o != null ? o.toString() : null;
}
/**
* Return as an Integer the value associated with a specified key.
*
* @param key the key for the desired value.
* @param defaultValue the value to return if the key does not exist.
*
* @return the value associated with the key, or the specified default value if the key does not exist or is not an
* Integer or string representation of an Integer.
*/
public static synchronized Integer getIntegerValue(String key, Integer defaultValue)
{
Integer v = getIntegerValue(key);
return v != null ? v : defaultValue;
}
/**
* Return as an Integer the value associated with a specified key.
*
* @param key the key for the desired value.
*
* @return the value associated with the key, or null if the key does not exist or is not an Integer or string
* representation of an Integer.
*/
public static synchronized Integer getIntegerValue(String key)
{
String v = getStringValue(key);
if (v == null)
return null;
try
{
return Integer.parseInt(v);
}
catch (NumberFormatException e)
{
Logging.logger().log(Level.SEVERE, "Configuration.ConversionError", v);
return null;
}
}
/**
* Return as an Long the value associated with a specified key.
*
* @param key the key for the desired value.
* @param defaultValue the value to return if the key does not exist.
*
* @return the value associated with the key, or the specified default value if the key does not exist or is not a
* Long or string representation of a Long.
*/
public static synchronized Long getLongValue(String key, Long defaultValue)
{
Long v = getLongValue(key);
return v != null ? v : defaultValue;
}
/**
* Return as an Long the value associated with a specified key.
*
* @param key the key for the desired value.
*
* @return the value associated with the key, or null if the key does not exist or is not a Long or string
* representation of a Long.
*/
public static synchronized Long getLongValue(String key)
{
String v = getStringValue(key);
if (v == null)
return null;
try
{
return Long.parseLong(v);
}
catch (NumberFormatException e)
{
Logging.logger().log(Level.SEVERE, "Configuration.ConversionError", v);
return null;
}
}
/**
* Return as an Double the value associated with a specified key.
*
* @param key the key for the desired value.
* @param defaultValue the value to return if the key does not exist.
*
* @return the value associated with the key, or the specified default value if the key does not exist or is not an
* Double or string representation of an Double.
*/
public static synchronized Double getDoubleValue(String key, Double defaultValue)
{
Double v = getDoubleValue(key);
return v != null ? v : defaultValue;
}
/**
* Return as an Double the value associated with a specified key.
*
* @param key the key for the desired value.
*
* @return the value associated with the key, or null if the key does not exist or is not an Double or string
* representation of an Double.
*/
public static synchronized Double getDoubleValue(String key)
{
String v = getStringValue(key);
if (v == null)
return null;
try
{
return Double.parseDouble(v);
}
catch (NumberFormatException e)
{
Logging.logger().log(Level.SEVERE, "Configuration.ConversionError", v);
return null;
}
}
/**
* Return as a Boolean the value associated with a specified key.
*
* Valid values for true are '1' or anything that starts with 't' or 'T'. ie. 'true', 'True', 't' Valid values for
* false are '0' or anything that starts with 'f' or 'F'. ie. 'false', 'False', 'f'
*
* @param key the key for the desired value.
* @param defaultValue the value to return if the key does not exist.
*
* @return the value associated with the key, or the specified default value if the key does not exist or is not a
* Boolean or string representation of an Boolean.
*/
public static synchronized Boolean getBooleanValue(String key, Boolean defaultValue)
{
Boolean v = getBooleanValue(key);
return v != null ? v : defaultValue;
}
/**
* Return as a Boolean the value associated with a specified key.
*
* Valid values for true are '1' or anything that starts with 't' or 'T'. ie. 'true', 'True', 't' Valid values for
* false are '0' or anything that starts with 'f' or 'F'. ie. 'false', 'False', 'f'
*
* @param key the key for the desired value.
*
* @return the value associated with the key, or null if the key does not exist or is not a Boolean or string
* representation of an Boolean.
*/
public static synchronized Boolean getBooleanValue(String key)
{
String v = getStringValue(key);
if (v == null)
return null;
if (v.trim().toUpperCase().startsWith("T") || v.trim().equals("1"))
{
return true;
}
else if (v.trim().toUpperCase().startsWith("F") || v.trim().equals("0"))
{
return false;
}
else
{
Logging.logger().log(Level.SEVERE, "Configuration.ConversionError", v);
return null;
}
}
/**
* Determines whether a key exists in the configuration.
*
* @param key the key of interest.
*
* @return true if the key exists, otherwise false.
*/
public static synchronized boolean hasKey(String key)
{
return getInstance().properties.contains(key);
}
/**
* Removes a key and its value from the configuration if the configuration contains the key.
*
* @param key the key of interest.
*/
public static synchronized void removeKey(String key)
{
getInstance().properties.remove(key);
}
/**
* Adds a key and value to the configuration, or changes the value associated with the key if the key is already in
* the configuration.
*
* @param key the key to set.
* @param value the value to associate with the key.
*/
public static synchronized void setValue(String key, Object value)
{
getInstance().properties.put(key, value.toString());
}
// OS, user, and run-time specific system properties. //
/**
* Returns the path to the application's current working directory.
*
* @return the absolute path to the application's current working directory.
*/
public static String getCurrentWorkingDirectory()
{
String dir = System.getProperty("user.dir");
return (dir != null) ? dir : ".";
}
/**
* Returns the path to the application user's home directory.
*
* @return the absolute path to the application user's home directory.
*/
public static String getUserHomeDirectory()
{
String dir = System.getProperty("user.home");
return (dir != null) ? dir : ".";
}
/**
* Returns the path to the operating system's temp directory.
*
* @return the absolute path to the operating system's temporary directory.
*/
public static String getSystemTempDirectory()
{
String dir = System.getProperty("java.io.tmpdir");
return (dir != null) ? dir : ".";
}
/**
* Returns the path to the current user's application data directory. The path returned depends on the operating
* system on which the Java Virtual Machine is running. The following table provides the path for all supported
* operating systems:
*
* Operating System Path Mac OS X ~/Library/Application
* Support Windows ~\\Application Data Linux, Unix,
* Solaris ~/
*
* @return the absolute path to the current user's application data directory.
*/
public static String getCurrentUserAppDataDirectory()
{
if (isMacOS())
{
// Return a path that Mac OS X has designated for app-specific data and support files. See the following URL
// for details:
// http://developer.apple.com/library/mac/#documentation/FileManagement/Conceptual/FileSystemProgrammingGUide/MacOSXDirectories/MacOSXDirectories.html#//apple_ref/doc/uid/TP40010672-CH10-SW1
return getUserHomeDirectory() + "/Library/Application Support";
}
else if (isWindowsOS())
{
return getUserHomeDirectory() + "\\Application Data";
}
else if (isLinuxOS() || isUnixOS() || isSolarisOS())
{
return getUserHomeDirectory();
}
else
{
String msg = Logging.getMessage("generic.UnknownOperatingSystem");
Logging.logger().fine(msg);
return null;
}
}
/**
* Determines whether the operating system is a Mac operating system.
*
* @return true if the operating system is a Mac operating system, otherwise false.
*/
public static boolean isMacOS()
{
String osName = System.getProperty("os.name");
return osName != null && osName.toLowerCase().contains("mac");
}
/**
* Determines whether the operating system is Windows operating system.
*
* @return true if the operating system is a Windows operating system, otherwise false.
*/
public static boolean isWindowsOS()
{
String osName = System.getProperty("os.name");
return osName != null && osName.toLowerCase().contains("windows");
}
/**
* Determines whether the operating system is Windows XP operating system.
*
* @return true if the operating system is a Windows XP operating system, otherwise false.
*/
public static boolean isWindowsXPOS()
{
String osName = System.getProperty("os.name");
return osName != null && osName.toLowerCase().contains("windows") && osName.contains("xp");
}
/**
* Determines whether the operating system is Windows Vista operating system.
*
* @return true if the operating system is a Windows Vista operating system, otherwise false.
*/
public static boolean isWindowsVistaOS()
{
String osName = System.getProperty("os.name");
return osName != null && osName.toLowerCase().contains("windows") && osName.contains("vista");
}
/**
* Determines whether the operating system is Windows 7 operating system.
*
* @return true if the operating system is a Windows Vista operating system, otherwise false.
*/
public static boolean isWindows7OS()
{
String osName = System.getProperty("os.name");
return osName != null && osName.toLowerCase().contains("windows") && osName.contains("7");
}
/**
* Determines whether the operating system is Linux operating system.
*
* @return true if the operating system is a Linux operating system, otherwise false.
*/
public static boolean isLinuxOS()
{
String osName = System.getProperty("os.name");
return osName != null && osName.toLowerCase().contains("linux");
}
/**
* Determines whether the operating system is Unix operating system.
*
* @return true if the operating system is a Unix operating system, otherwise false.
*/
public static boolean isUnixOS()
{
String osName = System.getProperty("os.name");
return osName != null && osName.toLowerCase().contains("unix");
}
/**
* Determines whether the operating system is Solaris operating system.
*
* @return true if the operating system is a Solaris operating system, otherwise false.
*/
public static boolean isSolarisOS()
{
String osName = System.getProperty("os.name");
return osName != null && osName.toLowerCase().contains("solaris");
}
/**
* Returns the version of the Java virtual machine.
*
* @return the Java virtual machine version.
*/
public static float getJavaVersion()
{
float ver = 0f;
String s = System.getProperty("java.specification.version");
if (null == s || s.length() == 0)
s = System.getProperty("java.version");
try
{
ver = Float.parseFloat(s.trim());
}
catch (NumberFormatException ignore)
{
}
return ver;
}
/**
* Returns the highest OpenGL profile available on the current graphics device that is compatible with World Wind.
* The returned profile favors hardware acceleration over software acceleration. With JOGL version 2.0, this returns
* the highest available profile from the following list:
*
* - OpenGL compatibility profile 4.x
- OpenGL compatibility profile 3.x
- OpenGL profile 1.x
* up to 3.0
*
* @return the highest compatible OpenGL profile.
*/
public static GLProfile getMaxCompatibleGLProfile()
{
return GLProfile.getMaxFixedFunc(true); // Favor a hardware rasterizer.
}
/**
* Returns a {@link com.jogamp.opengl.GLCapabilities} identifying graphics features required by World Wind. The
* capabilities instance returned requests the maximum OpenGL profile supporting GL fixed function operations, a
* frame buffer with 8 bits each of red, green, blue and alpha, a 24-bit depth buffer, double buffering, and if the
* Java property "gov.nasa.worldwind.stereo.mode" is set to "device", device supported stereo.
*
* @return a new capabilities instance identifying required graphics features.
*/
public static GLCapabilities getRequiredGLCapabilities()
{
GLCapabilities caps = new GLCapabilities(getMaxCompatibleGLProfile());
caps.setAlphaBits(8);
caps.setRedBits(8);
caps.setGreenBits(8);
caps.setBlueBits(8);
caps.setDepthBits(24);
caps.setDoubleBuffered(true);
// Determine whether we should request a stereo canvas
String stereo = System.getProperty(AVKey.STEREO_MODE);
if ("device".equals(stereo))
caps.setStereo(true);
return caps;
}
/**
* Returns a specified element of an XML configuration document.
*
* @param xpathExpression an XPath expression identifying the element of interest.
*
* @return the element of interest if the XPath expression is valid and the element exists, otherwise null.
*
* @throws NullPointerException if the XPath expression is null.
*/
public static Element getElement(String xpathExpression)
{
XPath xpath = WWXML.makeXPath();
for (Document doc : getInstance().configDocs)
{
try
{
Node node = (Node) xpath.evaluate(xpathExpression, doc.getDocumentElement(), XPathConstants.NODE);
if (node != null)
return (Element) node;
}
catch (XPathExpressionException e)
{
return null;
}
}
return null;
}
}
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