Make code backwards compatible with earlier versions of MCF.

git-svn-id: https://svn.apache.org/repos/asf/manifoldcf/integration/solr-3.x/trunk@1538883 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/mcf/src/java/org/apache/solr/mcf/ManifoldCFQParserPlugin.java b/mcf/src/java/org/apache/solr/mcf/ManifoldCFQParserPlugin.java
index ae3c2ff..44fda93 100644
--- a/mcf/src/java/org/apache/solr/mcf/ManifoldCFQParserPlugin.java
+++ b/mcf/src/java/org/apache/solr/mcf/ManifoldCFQParserPlugin.java
@@ -309,8 +309,16 @@
           urlBuffer.append("?");
         else
           urlBuffer.append("&");
-        urlBuffer.append("username_").append(Integer.toString(i)).append("=").append(URLEncoder.encode(domainMap.get(domain),"utf-8")).append("&")
-          .append("domain_").append(Integer.toString(i)).append("=").append(URLEncoder.encode(domain,"utf-8"));
+        // For backwards compatibility, handle the singleton case specially
+        if (domainMap.size() == 1 && domain.length() == 0)
+        {
+          urlBuffer.append("username=").append(URLEncoder.encode(domainMap.get(domain),"utf-8"));
+        }
+        else
+        {
+          urlBuffer.append("username_").append(Integer.toString(i)).append("=").append(URLEncoder.encode(domainMap.get(domain),"utf-8")).append("&")
+            .append("domain_").append(Integer.toString(i)).append("=").append(URLEncoder.encode(domain,"utf-8"));
+        }
         i++;
       }
       String theURL = urlBuffer.toString();
diff --git a/mcf/src/java/org/apache/solr/mcf/ManifoldCFSearchComponent.java b/mcf/src/java/org/apache/solr/mcf/ManifoldCFSearchComponent.java
index 9ff8858..9c785bf 100644
--- a/mcf/src/java/org/apache/solr/mcf/ManifoldCFSearchComponent.java
+++ b/mcf/src/java/org/apache/solr/mcf/ManifoldCFSearchComponent.java
@@ -337,8 +337,16 @@
         urlBuffer.append("?");
       else
         urlBuffer.append("&");
-      urlBuffer.append("username_").append(Integer.toString(i)).append("=").append(URLEncoder.encode(domainMap.get(domain),"utf-8")).append("&")
-        .append("domain_").append(Integer.toString(i)).append("=").append(URLEncoder.encode(domain,"utf-8"));
+      // For backwards compatibility, handle the singleton case specially
+      if (domainMap.size() == 1 && domain.length() == 0)
+      {
+        urlBuffer.append("username=").append(URLEncoder.encode(domainMap.get(domain),"utf-8"));
+      }
+      else
+      {
+        urlBuffer.append("username_").append(Integer.toString(i)).append("=").append(URLEncoder.encode(domainMap.get(domain),"utf-8")).append("&")
+          .append("domain_").append(Integer.toString(i)).append("=").append(URLEncoder.encode(domain,"utf-8"));
+      }
       i++;
     }
     String theURL = urlBuffer.toString();