1 files changed, 27 insertions, 5 deletions

diff --git a/src/main/java/eu/siacs/conversations/xmpp/jid/Jid.java b/src/main/java/eu/siacs/conversations/xmpp/jid/Jid.java
index a35ea37c..295e067a 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/jid/Jid.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/jid/Jid.java
@@ -1,9 +1,12 @@
 package eu.siacs.conversations.xmpp.jid;
 
+import android.util.LruCache;
+
 import net.java.otr4j.session.SessionID;
 
 import java.net.IDN;
 
+import eu.siacs.conversations.Config;
 import gnu.inet.encoding.Stringprep;
 import gnu.inet.encoding.StringprepException;
 
@@ -12,6 +15,8 @@ import gnu.inet.encoding.StringprepException;
  */
 public final class Jid {
 
+	private static LruCache<String,Jid> cache = new LruCache<>(1024);
+
 	private final String localpart;
 	private final String domainpart;
 	private final String resourcepart;
@@ -41,7 +46,11 @@ public final class Jid {
 	}
 
 	public static Jid fromString(final String jid) throws InvalidJidException {
-		return new Jid(jid);
+		return Jid.fromString(jid, false);
+	}
+
+	public static Jid fromString(final String jid, final boolean safe) throws InvalidJidException {
+		return new Jid(jid, safe);
 	}
 
 	public static Jid fromParts(final String localpart,
@@ -56,10 +65,21 @@ public final class Jid {
 		if (resourcepart != null && !resourcepart.isEmpty()) {
 			out = out + "/" + resourcepart;
 		}
-		return new Jid(out);
+		return new Jid(out, false);
 	}
 
-	private Jid(final String jid) throws InvalidJidException {
+	private Jid(final String jid, final boolean safe) throws InvalidJidException {
+		if (jid == null) throw new InvalidJidException(InvalidJidException.IS_NULL);
+
+		Jid fromCache = Jid.cache.get(jid);
+		if (fromCache != null) {
+			displayjid = fromCache.displayjid;
+			localpart = fromCache.localpart;
+			domainpart = fromCache.domainpart;
+			resourcepart = fromCache.resourcepart;
+			return;
+		}
+
 		// Hackish Android way to count the number of chars in a string... should work everywhere.
 		final int atCount = jid.length() - jid.replace("@", "").length();
 		final int slashCount = jid.length() - jid.replace("/", "").length();
@@ -88,7 +108,7 @@ public final class Jid {
 		} else {
 			final String lp = jid.substring(0, atLoc);
 			try {
-				localpart = Stringprep.nodeprep(lp);
+				localpart = Config.DISABLE_STRING_PREP || safe ? lp : Stringprep.nodeprep(lp);
 			} catch (final StringprepException e) {
 				throw new InvalidJidException(InvalidJidException.STRINGPREP_FAIL, e);
 			}
@@ -103,7 +123,7 @@ public final class Jid {
 		if (slashCount > 0) {
 			final String rp = jid.substring(slashLoc + 1, jid.length());
 			try {
-				resourcepart = Stringprep.resourceprep(rp);
+				resourcepart = Config.DISABLE_STRING_PREP || safe ? rp : Stringprep.resourceprep(rp);
 			} catch (final StringprepException e) {
 				throw new InvalidJidException(InvalidJidException.STRINGPREP_FAIL, e);
 			}
@@ -139,6 +159,8 @@ public final class Jid {
 			throw new InvalidJidException(InvalidJidException.INVALID_PART_LENGTH);
 		}
 
+		Jid.cache.put(jid, this);
+
 		this.displayjid = finaljid;
 	}