Add method to return a Post from the simple field set.

diff --git a/src/main/java/net/pterodactylus/sone/fcp/AbstractSoneCommand.java b/src/main/java/net/pterodactylus/sone/fcp/AbstractSoneCommand.java
index 4ad6389..ba3bc88 100644 (file)
--- a/src/main/java/net/pterodactylus/sone/fcp/AbstractSoneCommand.java
+++ b/src/main/java/net/pterodactylus/sone/fcp/AbstractSoneCommand.java
@@ -97,6 +97,32 @@ public abstract class AbstractSoneCommand extends AbstractCommand {
        }
 
        /**
+        * Returns a post whose ID is a parameter in the given simple field set.
+        *
+        * @param simpleFieldSet
+        *            The simple field set containing the ID of the post
+        * @param parameterName
+        *            The name under which the post ID is stored in the simple field
+        *            set
+        * @return The post
+        * @throws FcpException
+        *             if there is no post ID stored under the given parameter name,
+        *             or if the post ID is invalid
+        */
+       protected Post getPost(SimpleFieldSet simpleFieldSet, String parameterName) throws FcpException {
+               try {
+                       String postId = simpleFieldSet.getString(parameterName);
+                       Post post = core.getPost(postId, false);
+                       if (post == null) {
+                               throw new FcpException("Could not load post from “" + postId + "”.");
+                       }
+                       return post;
+               } catch (FSParseException fspe1) {
+                       throw new FcpException("Could not post ID from “" + parameterName + "”.", fspe1);
+               }
+       }
+
+       /**
         * Creates a simple field set from the given collection of Sones.
         *
         * @param sones