android: Add convenience methods to get/set selected apps to/from a sorted set

src/frontends/android/app/src/main/java/org/strongswan/android/data/VpnProfile.java

@@ -18,6 +18,11 @@
 package org.strongswan.android.data;
 
 
+import android.text.TextUtils;
+
+import java.util.Arrays;
+import java.util.SortedSet;
+import java.util.TreeSet;
 import java.util.UUID;
 
 public class VpnProfile implements Cloneable
@@ -202,6 +207,7 @@ public class VpnProfile implements Cloneable
 	{
 		this.mIncludedSubnets = includedSubnets;
 	}
+
 	public String getIncludedSubnets()
 	{
 		return mIncludedSubnets;
@@ -212,11 +218,26 @@ public class VpnProfile implements Cloneable
 		this.mSelectedApps = selectedApps;
 	}
 
+	public void setSelectedApps(SortedSet<String> selectedApps)
+	{
+		this.mSelectedApps = selectedApps.size() > 0 ? TextUtils.join(" ", selectedApps) : null;
+	}
+
 	public String getSelectedApps()
 	{
 		return mSelectedApps;
 	}
 
+	public SortedSet<String> getSelectedAppsSet()
+	{
+		TreeSet<String> set = new TreeSet<>();
+		if (!TextUtils.isEmpty(mSelectedApps))
+		{
+			set.addAll(Arrays.asList(mSelectedApps.split("\\s+")));
+		}
+		return set;
+	}
+
 	public void setSelectedAppsHandling(SelectedAppsHandling selectedAppsHandling)
 	{
 		this.mSelectedAppsHandling = selectedAppsHandling;

src/frontends/android/app/src/main/java/org/strongswan/android/logic/CharonVpnService.java

@@ -64,6 +64,7 @@ import java.security.cert.X509Certificate;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Locale;
+import java.util.SortedSet;
 
 public class CharonVpnService extends VpnService implements Runnable, VpnStateService.VpnStateListener
 {
@@ -811,7 +812,7 @@ public class CharonVpnService extends VpnService implements Runnable, VpnStateSe
 		private final IPRangeSet mExcludedSubnets;
 		private final int mSplitTunneling;
 		private final SelectedAppsHandling mAppHandling;
-		private final String[] mSelectedApps;
+		private final SortedSet<String> mSelectedApps;
 		private int mMtu;
 		private boolean mIPv4Seen, mIPv6Seen;
 
@@ -833,8 +834,7 @@ public class CharonVpnService extends VpnService implements Runnable, VpnStateSe
 			Integer splitTunneling = profile.getSplitTunneling();
 			mSplitTunneling = splitTunneling != null ? splitTunneling : 0;
 			mAppHandling = profile.getSelectedAppsHandling();
-			String selectedApps = profile.getSelectedApps();
+			mSelectedApps = profile.getSelectedAppsSet();
-			mSelectedApps = selectedApps != null ? selectedApps.split("\\s+") : null;
 		}
 
 		public void addAddress(String address, int prefixLength)
@@ -961,7 +961,7 @@ public class CharonVpnService extends VpnService implements Runnable, VpnStateSe
 				builder.addRoute("::", 0);
 			}
 			/* apply selected applications */
-			if (mSelectedApps != null && mSelectedApps.length > 0)
+			if (mSelectedApps.size() > 0)
 			{
 				switch (mAppHandling)
 				{