android: Change how CA certificates from different sources are accessed

src/frontends/android/src/org/strongswan/android/logic/TrustedCertificateManager.java

@@ -36,6 +36,25 @@ public class TrustedCertificateManager
 	private boolean mLoaded;
 	private final ArrayList<KeyStore> mKeyStores = new ArrayList<KeyStore>();
 
+	public enum TrustedCertificateSource
+	{
+		SYSTEM("system:"),
+		USER("user:"),
+		LOCAL("local:");
+
+		private final String mPrefix;
+
+		private TrustedCertificateSource(String prefix)
+		{
+			mPrefix = prefix;
+		}
+
+		private String getPrefix()
+		{
+			return mPrefix;
+		}
+	}
+
 	/**
 	 * Private constructor to prevent instantiation from other classes.
 	 */
@@ -202,44 +221,17 @@ public class TrustedCertificateManager
 	}
 
 	/**
-	 * Get only the system-wide CA certificates.
+	 * Get all certificates from the given source.
+	 * @param source type to filter certificates
 	 * @return Hashtable mapping aliases to certificates
 	 */
-	public Hashtable<String, X509Certificate> getSystemCACertificates()
+	public Hashtable<String, X509Certificate> getCACertificates(TrustedCertificateSource source)
-	{
-		return getCertificates("system:");
-	}
-
-	/**
-	 * Get only the CA certificates installed by the user.
-	 * @return Hashtable mapping aliases to certificates
-	 */
-	public Hashtable<String, X509Certificate> getUserCACertificates()
-	{
-		return getCertificates("user:");
-	}
-
-	/**
-	 * Get only the local CA certificates installed by the user.
-	 * @return Hashtable mapping aliases to certificates
-	 */
-	public Hashtable<String, X509Certificate> getLocalCACertificates()
-	{
-		return getCertificates("local:");
-	}
-
-	/**
-	 * Get all certificates whose aliases start with the given prefix.
-	 * @param prefix prefix to filter certificates
-	 * @return Hashtable mapping aliases to certificates
-	 */
-	private Hashtable<String, X509Certificate> getCertificates(String prefix)
 	{
 		Hashtable<String, X509Certificate> certs = new Hashtable<String, X509Certificate>();
 		this.mLock.readLock().lock();
 		for (String alias : this.mCACerts.keySet())
 		{
-			if (alias.startsWith(prefix))
+			if (alias.startsWith(source.getPrefix()))
 			{
 				certs.put(alias, this.mCACerts.get(alias));
 			}

src/frontends/android/src/org/strongswan/android/ui/TrustedCertificateListFragment.java

@@ -24,6 +24,7 @@ import java.util.Map.Entry;
 
 import org.strongswan.android.R;
 import org.strongswan.android.logic.TrustedCertificateManager;
+import org.strongswan.android.logic.TrustedCertificateManager.TrustedCertificateSource;
 import org.strongswan.android.security.TrustedCertificateEntry;
 import org.strongswan.android.ui.adapter.TrustedCertificateAdapter;
 
@@ -172,7 +173,7 @@ public class TrustedCertificateListFragment extends ListFragment implements Load
 			Hashtable<String,X509Certificate> certificates;
 			List<TrustedCertificateEntry> selected;
 
-			certificates = mUser ? certman.getUserCACertificates() : certman.getSystemCACertificates();
+			certificates = mUser ? certman.getCACertificates(TrustedCertificateSource.USER) : certman.getCACertificates(TrustedCertificateSource.SYSTEM);
 			selected = new ArrayList<TrustedCertificateEntry>();
 			for (Entry<String, X509Certificate> entry : certificates.entrySet())
 			{