1 files changed, 43 insertions, 0 deletions
diff --git a/config-model/src/main/java/com/yahoo/schema/processing/multifieldresolver/StemmingResolver.java b/config-model/src/main/java/com/yahoo/schema/processing/multifieldresolver/StemmingResolver.java
new file mode 100644
index 00000000000..95d9a50a6ab
--- /dev/null
+++ b/config-model/src/main/java/com/yahoo/schema/processing/multifieldresolver/StemmingResolver.java
@@ -0,0 +1,43 @@
+// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.schema.processing.multifieldresolver;
+
+import com.yahoo.config.application.api.DeployLogger;
+import com.yahoo.schema.Schema;
+import com.yahoo.schema.document.SDField;
+import com.yahoo.schema.document.Stemming;
+
+import java.util.List;
+import java.util.logging.Level;
+
+/**
+ * Class resolving conflicts when fields with different stemming-settings are
+ * combined into the same index
+ */
+public class StemmingResolver extends MultiFieldResolver {
+
+    public StemmingResolver(String indexName, List<SDField> fields, Schema schema, DeployLogger logger) {
+        super(indexName, fields, schema, logger);
+    }
+
+    @Override
+    public void resolve() {
+        checkStemmingForIndexFields(indexName, fields);
+    }
+
+    private void checkStemmingForIndexFields(String indexName, List<SDField> fields) {
+        Stemming stemming = null;
+        SDField stemmingField = null;
+        for (SDField field : fields) {
+            if (stemming == null && stemmingField==null) {
+                stemming = field.getStemming(schema);
+                stemmingField = field;
+            } else if (stemming != field.getStemming(schema)) {
+                deployLogger.logApplicationPackage(Level.WARNING, "Field '" + field.getName() + "' has " + field.getStemming(schema) +
+                                                                  ", whereas field '" + stemmingField.getName() + "' has " + stemming +
+                                                                  ". All fields indexing to the index '" + indexName + "' must have the same stemming." +
+                                                                  " This should be corrected as it will make indexing fail in a few cases.");
+            }
+        }
+    }
+
+}