From 729da71b3927879d79062fe4770ed024068bbd17 Mon Sep 17 00:00:00 2001
From: jprocter <Jim Procter>
Date: Thu, 4 Dec 2008 10:21:58 +0000
Subject: [PATCH] select source by implementation class

---
 src/jalview/ws/seqfetcher/ASequenceFetcher.java |   33 +++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/src/jalview/ws/seqfetcher/ASequenceFetcher.java b/src/jalview/ws/seqfetcher/ASequenceFetcher.java
index 8a8cf44..013fb15 100644
--- a/src/jalview/ws/seqfetcher/ASequenceFetcher.java
+++ b/src/jalview/ws/seqfetcher/ASequenceFetcher.java
@@ -297,4 +297,37 @@ public class ASequenceFetcher
     return false;
   }
 
+  /**
+   * select sources which are implemented by instances of the given class
+   * @param class that implements DbSourceProxy
+   * @return null or vector of source names for fetchers
+   */
+  public String[] getDbInstances(Class class1)
+  {
+    if (!jalview.ws.seqfetcher.DbSourceProxy.class.isAssignableFrom(class1))
+    {
+      throw new Error("Implmentation Error - getDbInstances must be given a class that implements jalview.ws.seqfetcher.DbSourceProxy (was given '"+class1+"')");
+    }
+    if (FETCHABLEDBS==null)
+    {
+      return null;
+    }
+    String[] sources = null;
+    Vector src = new Vector();
+    Enumeration dbs = FETCHABLEDBS.keys();
+    while (dbs.hasMoreElements())
+    {
+      String dbn = (String) dbs.nextElement();
+      DbSourceProxy dbp = (DbSourceProxy) FETCHABLEDBS.get(dbn);
+      if (class1.isAssignableFrom(dbp.getClass()))
+      {
+        src.addElement(dbn);
+      }
+    }
+    if (src.size()>0)
+    {
+      src.copyInto(sources = new String[src.size()]);
+    }
+    return sources;
+  }
 }
-- 
1.7.10.2