choose record format based on config setting

needed for import tool and consistency checker
in enterprise formats, since these tools are in the
community edition.

community/kernel/src/main/java/org/neo4j/kernel/impl/store/format/InternalRecordFormatSelector.java

@@ -19,7 +19,9 @@
  */
 package org.neo4j.kernel.impl.store.format;
 
-import org.neo4j.kernel.impl.store.format.lowlimit.LowLimit;
+import org.neo4j.helpers.Service;
+import org.neo4j.kernel.configuration.Config;
+import org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory;
 
 /**
  * Selects format to use for databases in this JVM, using a system property. By default uses the safest
@@ -28,16 +30,29 @@
  */
 public class InternalRecordFormatSelector
 {
-    public static RecordFormats select()
+    public static RecordFormats select( Config config )
     {
-        String formatsClassName = System.getProperty( RecordFormats.class.getName(), LowLimit.class.getName() );
-        try
+        String key = config.get( GraphDatabaseFacadeFactory.Configuration.record_type );
+        RecordFormats.Factory potentialCandidate = null;
+        for ( RecordFormats.Factory candidate : Service.load( RecordFormats.Factory.class ) )
         {
-            return Class.forName( formatsClassName ).asSubclass( RecordFormats.class ).newInstance();
+            String candidateId = candidate.getKeys().iterator().next();
+            if ( candidateId.equals( key ) )
+            {
+                return candidate.newInstance();
+            }
+            else if ( potentialCandidate == null || candidateId.equals( "highlimit" ) )
+            {
+                potentialCandidate = candidate;
+            }
         }
-        catch ( Exception e )
+        if ( key.equals( "" ) )
         {
-            throw new Error( "Couldn't load specified record format class '" + formatsClassName + "'", e );
+            return potentialCandidate.newInstance();
+        }
+        else
+        {
+            throw new IllegalArgumentException( "Invalid configuration for record format." );
         }
     }
 }

community/kernel/src/main/java/org/neo4j/kernel/impl/store/format/RecordFormats.java

@@ -19,6 +19,7 @@
  */
 package org.neo4j.kernel.impl.store.format;
 
+import org.neo4j.helpers.Service;
 import org.neo4j.kernel.impl.store.record.DynamicRecord;
 import org.neo4j.kernel.impl.store.record.LabelTokenRecord;
 import org.neo4j.kernel.impl.store.record.NodeRecord;
@@ -30,6 +31,17 @@
 
 public interface RecordFormats
 {
+
+    abstract class Factory extends Service
+    {
+        public Factory( String key, String... altKeys )
+        {
+            super( key, altKeys );
+        }
+
+        public abstract RecordFormats newInstance();
+    }
+
     String storeVersion();
 
     RecordFormat<NodeRecord> node();

community/kernel/src/main/java/org/neo4j/kernel/impl/store/format/lowlimit/LowLimitFactory.java

@@ -0,0 +1,19 @@
+package org.neo4j.kernel.impl.store.format.lowlimit;
+
+import org.neo4j.helpers.Service;
+import org.neo4j.kernel.impl.store.format.RecordFormats;
+
+@Service.Implementation(RecordFormats.Factory.class)
+public class LowLimitFactory extends RecordFormats.Factory
+{
+    public LowLimitFactory()
+    {
+        super( "lowlimit" );
+    }
+
+    @Override
+    public RecordFormats newInstance( )
+    {
+        return LowLimit.RECORD_FORMATS;
+    }
+}

enterprise/kernel/src/main/java/org/neo4j/kernel/impl/store/format/highlimit/HighLimitFactory.java

@@ -0,0 +1,19 @@
+package org.neo4j.kernel.impl.store.format.highlimit;
+
+import org.neo4j.helpers.Service;
+import org.neo4j.kernel.impl.store.format.RecordFormats;
+
+@Service.Implementation(RecordFormats.Factory.class)
+public class HighLimitFactory extends RecordFormats.Factory
+{
+    public HighLimitFactory()
+    {
+        super( "highlimit" );
+    }
+
+    @Override
+    public RecordFormats newInstance()
+    {
+        return HighLimit.RECORD_FORMATS;
+    }
+}