X-Git-Url: https://juplo.de/gitweb/?p=examples%2Ffacebook-app;a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fyourshouter%2FSpringSecurityContextUserIdSource.java;fp=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fyourshouter%2FSpringSecurityContextUserIdSource.java;h=d774060ca96822943aba65cc6158d625569cf103;hp=0000000000000000000000000000000000000000;hb=8f6d3c83aa9651e593b57b3d47cfd50a4ae73661;hpb=ca351a3eb7442fbb183aa62e1a58cd85bc1f2ef7

diff --git a/src/main/java/de/juplo/yourshouter/SpringSecurityContextUserIdSource.java b/src/main/java/de/juplo/yourshouter/SpringSecurityContextUserIdSource.java
new file mode 100644
index 0000000..d774060
--- /dev/null
+++ b/src/main/java/de/juplo/yourshouter/SpringSecurityContextUserIdSource.java
@@ -0,0 +1,33 @@
+package de.juplo.yourshouter;
+
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.context.SecurityContext;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.social.UserIdSource;
+import org.springframework.util.Assert;
+
+
+/**
+ * Implementation of {@link UserIdSource}, that retrieves the ID of the current
+ * user from the {@link SecurityContext}.
+ *
+ * @author Kai Moritz
+ */
+public class SpringSecurityContextUserIdSource implements UserIdSource
+{
+  /**
+   * Retrieves the ID of the current user from the {@link SecurityContext}.
+   * If no ID is found, an exception is thrown.
+   *
+   * @return The ID of the current user
+   * @throws IllegalStateException, if no current user is found.
+   */
+  @Override
+  public String getUserId()
+  {
+    SecurityContext context = SecurityContextHolder.getContext();
+    Authentication authentication = context.getAuthentication();
+    Assert.state(authentication != null, "No user signed in!");
+    return authentication.getName();
+  }
+}