Add getTempDirPath() and getSystemTempDirPath()

Issue-Ref: 2443
Signed-off-by: Simon Barner <barner@fortiss.org>

org.fortiss.tooling.base/src/org/fortiss/tooling/base/utils/.ratings

@@ -13,6 +13,6 @@ PointUtils.java b21c92cc8e80ece9d87ede8a750f4de314379743 GREEN
 PointsUtils.java bad69811c59004948929f6a57edd5a79c0bf8643 GREEN
 RectangleLayoutUtils.java cdd61d162761da7f3e1d3512264135b9b0d564ff GREEN
 SnapToGridUtils.java 413785d7a8655db31a129b6f821e1d5f859aa726 GREEN
-SystemUtils.java 8546c23e43551a58f4aca273015c496546793611 YELLOW
+SystemUtils.java bd40519b5e286f274f47815ccc8d320fd65c2c0a YELLOW
 VisualizationModelElementFactory.java 18e67450ee4cf4a03dc88a10becb0fb6ce4c1bad GREEN
 ZoomUtils.java a339613fde18281bed3b55b529a053d348545bc7 GREEN

org.fortiss.tooling.base/src/org/fortiss/tooling/base/utils/SystemUtils.java

@@ -15,6 +15,10 @@
 +--------------------------------------------------------------------------*/
 package org.fortiss.tooling.base.utils;
 
+import static java.io.File.separator;
+import static java.lang.System.getProperty;
+import static java.util.UUID.randomUUID;
+
 /**
  * Utility functions that deal with the underlying system.
  * 
@@ -70,4 +74,33 @@ public class SystemUtils {
 		}
 		return "";
 	}
+
+	/** Returns the path to the system's temporary directory. */
+	public static String getSystemTempDirPath() {
+		return getTempDirPath(false, null);
+	}
+
+	/**
+	 * Returns the path to a directory in the system's temporary directory that follows the pattern<br>
+	 * {@code <SYS_TEMP_DIR>[/UNIQUE_DIR][/SUB_DIR]}
+	 * 
+	 * @param unique
+	 *            Flag if a unique sub-directory should be appended to the path of the system's
+	 *            temporary directory.
+	 * @param subdir
+	 *            Sub-directory within system's temporary directory (may be {@code null}).
+	 * @return Path to a directory in the system's temporary directory.
+	 */
+	public static String getTempDirPath(boolean unique, String subdir) {
+		String tmpDir = getProperty("java.io.tmpdir");
+		if(unique) {
+			tmpDir += separator + randomUUID();
+		}
+
+		if(subdir != null) {
+			tmpDir += separator + subdir;
+		}
+
+		return tmpDir;
+	}
 }