X-Git-Url: https://git.pterodactylus.net/?p=Sone.git;a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fnet%2Fpterodactylus%2Fsone%2Fdata%2FIdentified.java;fp=src%2Fmain%2Fjava%2Fnet%2Fpterodactylus%2Fsone%2Fdata%2FIdentified.java;h=f12f842a7938981a8ba07848dee9f77ff0abfa9f;hp=0000000000000000000000000000000000000000;hb=f855be86d4d02a29c4603522c793a3b0eecc961c;hpb=31fb0e9754cad9c3bbab88ee728c7ca46b53e6ef
diff --git a/src/main/java/net/pterodactylus/sone/data/Identified.java b/src/main/java/net/pterodactylus/sone/data/Identified.java
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+/*
+ * Sone - Identified.java - Copyright © 2013 David Roden
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+package net.pterodactylus.sone.data;
+
+import com.google.common.base.Function;
+import com.google.common.base.Optional;
+
+/**
+ * Interface for all objects that expose an ID.
+ *
+ * @author David âBombeâ Roden
+ */
+public interface Identified {
+
+ /** Function to extract the ID from an optional. */
+ public static final Function, Optional> GET_ID = new Function, Optional>() {
+
+ @Override
+ public Optional apply(Optional extends Identified> identified) {
+ return identified.isPresent() ? Optional.of(identified.get().getId()) : Optional.absent();
+ }
+ };
+
+ /**
+ * Returns the ID of this element.
+ *
+ * @return The ID of this element
+ */
+ public String getId();
+
+}