Added better error message when field types are not the same

core/src/main/java/org/elasticsearch/index/mapper/FieldTypeLookup.java

@@ -107,9 +107,12 @@ class FieldTypeLookup implements Iterable<MappedFieldType> {
         for (FieldMapper fieldMapper : newFieldMappers) {
             MappedFieldTypeReference ref = fullNameToFieldType.get(fieldMapper.fieldType().names().fullName());
             if (ref != null) {
-                boolean strict = ref.getNumAssociatedMappers() > 1 && updateAllTypes == false;
                 List<String> conflicts = new ArrayList<>();
+                ref.get().checkTypeName(fieldMapper.fieldType(), conflicts);
+                if (conflicts.isEmpty()) { // only check compat if they are the same type
+                    boolean strict = ref.getNumAssociatedMappers() > 1 && updateAllTypes == false;
                     ref.get().checkCompatibility(fieldMapper.fieldType(), conflicts, strict);
+                }
                 if (conflicts.isEmpty() == false) {
                     throw new IllegalArgumentException("Mapper for [" + fieldMapper.fieldType().names().fullName() + "] conflicts with existing mapping in other types" + conflicts.toString());
                 }
@@ -118,9 +121,12 @@ class FieldTypeLookup implements Iterable<MappedFieldType> {
             // field type for the index name must be compatible too
             MappedFieldTypeReference indexNameRef = fullNameToFieldType.get(fieldMapper.fieldType().names().indexName());
             if (indexNameRef != null) {
-                boolean strict = indexNameRef.getNumAssociatedMappers() > 1 && updateAllTypes == false;
                 List<String> conflicts = new ArrayList<>();
+                ref.get().checkTypeName(fieldMapper.fieldType(), conflicts);
+                if (conflicts.isEmpty()) { // only check compat if they are the same type
+                    boolean strict = indexNameRef.getNumAssociatedMappers() > 1 && updateAllTypes == false;
                     indexNameRef.get().checkCompatibility(fieldMapper.fieldType(), conflicts, strict);
+                }
                 if (conflicts.isEmpty() == false) {
                     throw new IllegalArgumentException("Mapper for [" + fieldMapper.fieldType().names().fullName() + "] conflicts with mapping with the same index name in other types" + conflicts.toString());
                 }

core/src/main/java/org/elasticsearch/index/mapper/MappedFieldType.java

@@ -50,7 +50,7 @@ import java.util.Objects;
 /**
  * This defines the core properties and functions to operate on a field.
  */
-public class MappedFieldType extends FieldType {
+public abstract class MappedFieldType extends FieldType {
 
     public static class Names {
 
@@ -194,12 +194,17 @@ public class MappedFieldType extends FieldType {
         this.nullValueAsString = ref.nullValueAsString();
     }
 
-    public MappedFieldType() {}
+    public MappedFieldType() {
-
+        setTokenized(true);
-    public MappedFieldType clone() {
+        setStored(false);
-        return new MappedFieldType(this);
+        setStoreTermVectors(false);
+        setOmitNorms(false);
+        setIndexOptions(IndexOptions.DOCS_AND_FREQS_AND_POSITIONS);
+        setBoost(1.0f);
     }
 
+    public abstract MappedFieldType clone();
+
     @Override
     public boolean equals(Object o) {
         if (!super.equals(o)) return false;
@@ -224,6 +229,18 @@ public class MappedFieldType extends FieldType {
 
 // norelease: we need to override freeze() and add safety checks that all settings are actually set
 
+    /** Returns the name of this type, as would be specified in mapping properties */
+    public abstract String typeName();
+
+    /** Checks this type is the same type as other. Adds a conflict if they are different. */
+    public final void checkTypeName(MappedFieldType other, List<String> conflicts) {
+        if (typeName().equals(other.typeName()) == false) {
+            conflicts.add("mapper [" + names().fullName() + "] cannot be changed from type [" + typeName() + "] to [" + other.typeName() + "]");
+        } else if (getClass() != other.getClass()) {
+            throw new IllegalStateException("Type names equal for class " + getClass().getSimpleName() + " and " + other.getClass().getSimpleName());
+        }
+    }
+
     /**
      * Checks for any conflicts between this field type and other.
      * If strict is true, all properties must be equal.
@@ -240,7 +257,7 @@ public class MappedFieldType extends FieldType {
             conflicts.add("mapper [" + names().fullName() + "] has different store values");
         }
         if (hasDocValues() == false && other.hasDocValues()) {
-            // don't add conflict if this mapper has doc values while the mapper to merge doesn't since doc values are implicitely set
+            // don't add conflict if this mapper has doc values while the mapper to merge doesn't since doc values are implicitly set
             // when the doc_values field data format is configured
             conflicts.add("mapper [" + names().fullName() + "] has different doc_values values");
         }

core/src/main/java/org/elasticsearch/index/mapper/core/AbstractFieldMapper.java

@@ -63,18 +63,6 @@ import static org.elasticsearch.index.mapper.core.TypeParsers.DOC_VALUES;
 public abstract class AbstractFieldMapper implements FieldMapper {
 
     public static class Defaults {
-        public static final MappedFieldType FIELD_TYPE = new MappedFieldType();
-
-        static {
-            FIELD_TYPE.setTokenized(true);
-            FIELD_TYPE.setStored(false);
-            FIELD_TYPE.setStoreTermVectors(false);
-            FIELD_TYPE.setOmitNorms(false);
-            FIELD_TYPE.setIndexOptions(IndexOptions.DOCS_AND_FREQS_AND_POSITIONS);
-            FIELD_TYPE.setBoost(Defaults.BOOST);
-            FIELD_TYPE.freeze();
-        }
-
         public static final float BOOST = 1.0f;
         public static final ContentPath.Type PATH_TYPE = ContentPath.Type.FULL;
     }
@@ -409,6 +397,14 @@ public abstract class AbstractFieldMapper implements FieldMapper {
         }
         AbstractFieldMapper fieldMergeWith = (AbstractFieldMapper) mergeWith;
         List<String> subConflicts = new ArrayList<>(); // TODO: just expose list from MergeResult?
+        fieldType().checkTypeName(fieldMergeWith.fieldType(), subConflicts);
+        if (subConflicts.isEmpty() == false) {
+            // return early if field types don't match
+            assert subConflicts.size() == 1;
+            mergeResult.addConflict(subConflicts.get(0));
+            return;
+        }
+
         boolean strict = this.fieldTypeRef.getNumAssociatedMappers() > 1 && mergeResult.updateAllTypes() == false;
         fieldType().checkCompatibility(fieldMergeWith.fieldType(), subConflicts, strict);
         for (String conflict : subConflicts) {

core/src/main/java/org/elasticsearch/index/mapper/core/BinaryFieldMapper.java

@@ -109,9 +109,7 @@ public class BinaryFieldMapper extends AbstractFieldMapper {
     static final class BinaryFieldType extends MappedFieldType {
         private boolean tryUncompressing = false;
 
-        public BinaryFieldType() {
+        public BinaryFieldType() {}
-            super(AbstractFieldMapper.Defaults.FIELD_TYPE);
-        }
 
         protected BinaryFieldType(BinaryFieldType ref) {
             super(ref);
@@ -135,6 +133,11 @@ public class BinaryFieldMapper extends AbstractFieldMapper {
             return Objects.hash(super.hashCode(), tryUncompressing);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         public boolean tryUncompressing() {
             return tryUncompressing;
         }

core/src/main/java/org/elasticsearch/index/mapper/core/BooleanFieldMapper.java

@@ -118,9 +118,7 @@ public class BooleanFieldMapper extends AbstractFieldMapper {
 
     public static final class BooleanFieldType extends MappedFieldType {
 
-        public BooleanFieldType() {
+        public BooleanFieldType() {}
-            super(AbstractFieldMapper.Defaults.FIELD_TYPE);
-        }
 
         protected BooleanFieldType(BooleanFieldType ref) {
             super(ref);
@@ -131,6 +129,11 @@ public class BooleanFieldMapper extends AbstractFieldMapper {
             return new BooleanFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public Boolean nullValue() {
             return (Boolean)super.nullValue();

core/src/main/java/org/elasticsearch/index/mapper/core/ByteFieldMapper.java

@@ -134,6 +134,11 @@ public class ByteFieldMapper extends NumberFieldMapper {
             return new ByteFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public Byte nullValue() {
             return (Byte)super.nullValue();

core/src/main/java/org/elasticsearch/index/mapper/core/CompletionFieldMapper.java

@@ -226,9 +226,7 @@ public class CompletionFieldMapper extends AbstractFieldMapper {
         private AnalyzingCompletionLookupProvider analyzingSuggestLookupProvider;
         private SortedMap<String, ContextMapping> contextMapping = ContextMapping.EMPTY_MAPPING;
 
-        public CompletionFieldType() {
+        public CompletionFieldType() {}
-            super(AbstractFieldMapper.Defaults.FIELD_TYPE);
-        }
 
         protected CompletionFieldType(CompletionFieldType ref) {
             super(ref);
@@ -242,6 +240,11 @@ public class CompletionFieldMapper extends AbstractFieldMapper {
             return new CompletionFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public void checkCompatibility(MappedFieldType fieldType, List<String> conflicts, boolean strict) {
             super.checkCompatibility(fieldType, conflicts, strict);

core/src/main/java/org/elasticsearch/index/mapper/core/DateFieldMapper.java

@@ -251,6 +251,11 @@ public class DateFieldMapper extends NumberFieldMapper {
             return Objects.hash(super.hashCode(), dateTimeFormatter.format(), timeUnit);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public void checkCompatibility(MappedFieldType fieldType, List<String> conflicts, boolean strict) {
             super.checkCompatibility(fieldType, conflicts, strict);

core/src/main/java/org/elasticsearch/index/mapper/core/DoubleFieldMapper.java

@@ -126,7 +126,7 @@ public class DoubleFieldMapper extends NumberFieldMapper {
         }
     }
 
-    static final class DoubleFieldType extends NumberFieldType {
+    public static final class DoubleFieldType extends NumberFieldType {
 
         public DoubleFieldType() {
             super(NumericType.DOUBLE);
@@ -141,6 +141,11 @@ public class DoubleFieldMapper extends NumberFieldMapper {
             return new DoubleFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public Double nullValue() {
             return (Double)super.nullValue();

core/src/main/java/org/elasticsearch/index/mapper/core/FloatFieldMapper.java

@@ -142,6 +142,11 @@ public class FloatFieldMapper extends NumberFieldMapper {
             return new FloatFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public Float nullValue() {
             return (Float)super.nullValue();

core/src/main/java/org/elasticsearch/index/mapper/core/IntegerFieldMapper.java

@@ -143,6 +143,11 @@ public class IntegerFieldMapper extends NumberFieldMapper {
             return new IntegerFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public Integer nullValue() {
             return (Integer)super.nullValue();

core/src/main/java/org/elasticsearch/index/mapper/core/LongFieldMapper.java

@@ -142,6 +142,11 @@ public class LongFieldMapper extends NumberFieldMapper {
             return new LongFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public Long nullValue() {
             return (Long)super.nullValue();

core/src/main/java/org/elasticsearch/index/mapper/core/NumberFieldMapper.java

@@ -136,7 +136,6 @@ public abstract class NumberFieldMapper extends AbstractFieldMapper implements A
     public static abstract class NumberFieldType extends MappedFieldType {
 
         public NumberFieldType(NumericType numericType) {
-            super(AbstractFieldMapper.Defaults.FIELD_TYPE);
             setTokenized(false);
             setOmitNorms(true);
             setIndexOptions(IndexOptions.DOCS);

core/src/main/java/org/elasticsearch/index/mapper/core/ShortFieldMapper.java

@@ -140,6 +140,11 @@ public class ShortFieldMapper extends NumberFieldMapper {
             return new ShortFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public Short nullValue() {
             return (Short)super.nullValue();

core/src/main/java/org/elasticsearch/index/mapper/core/StringFieldMapper.java

@@ -186,9 +186,7 @@ public class StringFieldMapper extends AbstractFieldMapper implements AllFieldMa
 
     public static final class StringFieldType extends MappedFieldType {
 
-        public StringFieldType() {
+        public StringFieldType() {}
-            super(AbstractFieldMapper.Defaults.FIELD_TYPE);
-        }
 
         protected StringFieldType(StringFieldType ref) {
             super(ref);
@@ -198,6 +196,11 @@ public class StringFieldMapper extends AbstractFieldMapper implements AllFieldMa
             return new StringFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public String value(Object value) {
             if (value == null) {

core/src/main/java/org/elasticsearch/index/mapper/geo/GeoPointFieldMapper.java

@@ -287,9 +287,7 @@ public class GeoPointFieldMapper extends AbstractFieldMapper implements ArrayVal
         private boolean normalizeLon = true;
         private boolean normalizeLat = true;
 
-        public GeoPointFieldType() {
+        public GeoPointFieldType() {}
-            super(StringFieldMapper.Defaults.FIELD_TYPE);
-        }
 
         protected GeoPointFieldType(GeoPointFieldType ref) {
             super(ref);
@@ -329,6 +327,11 @@ public class GeoPointFieldMapper extends AbstractFieldMapper implements ArrayVal
             return java.util.Objects.hash(super.hashCode(), geohashFieldType, geohashPrecision, geohashPrefixEnabled, latFieldType, lonFieldType, validateLon, validateLat, normalizeLon, normalizeLat);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+        
         @Override
         public void checkCompatibility(MappedFieldType fieldType, List<String> conflicts, boolean strict) {
             super.checkCompatibility(fieldType, conflicts, strict);

core/src/main/java/org/elasticsearch/index/mapper/geo/GeoShapeFieldMapper.java

@@ -183,9 +183,7 @@ public class GeoShapeFieldMapper extends AbstractFieldMapper {
         private RecursivePrefixTreeStrategy recursiveStrategy;
         private TermQueryPrefixTreeStrategy termStrategy;
 
-        public GeoShapeFieldType() {
+        public GeoShapeFieldType() {}
-            super(AbstractFieldMapper.Defaults.FIELD_TYPE);
-        }
 
         protected GeoShapeFieldType(GeoShapeFieldType ref) {
             super(ref);
@@ -221,6 +219,11 @@ public class GeoShapeFieldMapper extends AbstractFieldMapper {
             return Objects.hash(super.hashCode(), tree, strategyName, treeLevels, precisionInMeters, distanceErrorPct, defaultDistanceErrorPct, orientation);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public void freeze() {
             super.freeze();

core/src/main/java/org/elasticsearch/index/mapper/internal/AllFieldMapper.java

@@ -156,9 +156,7 @@ public class AllFieldMapper extends AbstractFieldMapper implements RootMapper {
 
     static final class AllFieldType extends MappedFieldType {
 
-        public AllFieldType() {
+        public AllFieldType() {}
-            super(AbstractFieldMapper.Defaults.FIELD_TYPE);
-        }
 
         protected AllFieldType(AllFieldType ref) {
             super(ref);
@@ -169,6 +167,11 @@ public class AllFieldMapper extends AbstractFieldMapper implements RootMapper {
             return new AllFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public String value(Object value) {
             if (value == null) {

core/src/main/java/org/elasticsearch/index/mapper/internal/FieldNamesFieldMapper.java

@@ -137,15 +137,18 @@ public class FieldNamesFieldMapper extends AbstractFieldMapper implements RootMa
 
         private boolean enabled = Defaults.ENABLED;
 
-        public FieldNamesFieldType() {
+        public FieldNamesFieldType() {}
-            super(AbstractFieldMapper.Defaults.FIELD_TYPE);
-        }
 
         protected FieldNamesFieldType(FieldNamesFieldType ref) {
             super(ref);
             this.enabled = ref.enabled;
         }
 
+        @Override
+        public FieldNamesFieldType clone() {
+            return new FieldNamesFieldType(this);
+        }
+
         @Override
         public boolean equals(Object o) {
             if (!super.equals(o)) return false;
@@ -158,6 +161,11 @@ public class FieldNamesFieldMapper extends AbstractFieldMapper implements RootMa
             return Objects.hash(super.hashCode(), enabled);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public void checkCompatibility(MappedFieldType fieldType, List<String> conflicts, boolean strict) {
             if (strict) {
@@ -177,11 +185,6 @@ public class FieldNamesFieldMapper extends AbstractFieldMapper implements RootMa
             return enabled;
         }
 
-        @Override
-        public FieldNamesFieldType clone() {
-            return new FieldNamesFieldType(this);
-        }
-
         @Override
         public String value(Object value) {
             if (value == null) {

core/src/main/java/org/elasticsearch/index/mapper/internal/IdFieldMapper.java

@@ -136,9 +136,7 @@ public class IdFieldMapper extends AbstractFieldMapper implements RootMapper {
 
     static final class IdFieldType extends MappedFieldType {
 
-        public IdFieldType() {
+        public IdFieldType() {}
-            super(AbstractFieldMapper.Defaults.FIELD_TYPE);
-        }
 
         protected IdFieldType(IdFieldType ref) {
             super(ref);
@@ -149,6 +147,10 @@ public class IdFieldMapper extends AbstractFieldMapper implements RootMapper {
             return new IdFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
 
         @Override
         public String value(Object value) {

core/src/main/java/org/elasticsearch/index/mapper/internal/IndexFieldMapper.java

@@ -120,9 +120,7 @@ public class IndexFieldMapper extends AbstractFieldMapper implements RootMapper
 
     static final class IndexFieldType extends MappedFieldType {
 
-        public IndexFieldType() {
+        public IndexFieldType() {}
-            super(AbstractFieldMapper.Defaults.FIELD_TYPE);
-        }
 
         protected IndexFieldType(IndexFieldType ref) {
             super(ref);
@@ -133,6 +131,11 @@ public class IndexFieldMapper extends AbstractFieldMapper implements RootMapper
             return new IndexFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public String value(Object value) {
             if (value == null) {

core/src/main/java/org/elasticsearch/index/mapper/internal/ParentFieldMapper.java

@@ -147,9 +147,7 @@ public class ParentFieldMapper extends AbstractFieldMapper implements RootMapper
 
     static final class ParentFieldType extends MappedFieldType {
 
-        public ParentFieldType() {
+        public ParentFieldType() {}
-            super(AbstractFieldMapper.Defaults.FIELD_TYPE);
-        }
 
         protected ParentFieldType(ParentFieldType ref) {
             super(ref);
@@ -160,6 +158,11 @@ public class ParentFieldMapper extends AbstractFieldMapper implements RootMapper
             return new ParentFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public Uid value(Object value) {
             if (value == null) {

core/src/main/java/org/elasticsearch/index/mapper/internal/RoutingFieldMapper.java

@@ -125,9 +125,7 @@ public class RoutingFieldMapper extends AbstractFieldMapper implements RootMappe
 
     static final class RoutingFieldType extends MappedFieldType {
 
-        public RoutingFieldType() {
+        public RoutingFieldType() {}
-            super(AbstractFieldMapper.Defaults.FIELD_TYPE);
-        }
 
         protected RoutingFieldType(RoutingFieldType ref) {
             super(ref);
@@ -138,6 +136,11 @@ public class RoutingFieldMapper extends AbstractFieldMapper implements RootMappe
             return new RoutingFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public String value(Object value) {
             if (value == null) {

core/src/main/java/org/elasticsearch/index/mapper/internal/SourceFieldMapper.java

@@ -200,9 +200,7 @@ public class SourceFieldMapper extends AbstractFieldMapper implements RootMapper
 
     static final class SourceFieldType extends MappedFieldType {
 
-        public SourceFieldType() {
+        public SourceFieldType() {}
-            super(AbstractFieldMapper.Defaults.FIELD_TYPE);
-        }
 
         protected SourceFieldType(SourceFieldType ref) {
             super(ref);
@@ -213,6 +211,11 @@ public class SourceFieldMapper extends AbstractFieldMapper implements RootMapper
             return new SourceFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public byte[] value(Object value) {
             if (value == null) {

core/src/main/java/org/elasticsearch/index/mapper/internal/TypeFieldMapper.java

@@ -106,9 +106,7 @@ public class TypeFieldMapper extends AbstractFieldMapper implements RootMapper {
 
     static final class TypeFieldType extends MappedFieldType {
 
-        public TypeFieldType() {
+        public TypeFieldType() {}
-            super(AbstractFieldMapper.Defaults.FIELD_TYPE);
-        }
 
         protected TypeFieldType(TypeFieldType ref) {
             super(ref);
@@ -119,6 +117,11 @@ public class TypeFieldMapper extends AbstractFieldMapper implements RootMapper {
             return new TypeFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public String value(Object value) {
             if (value == null) {

core/src/main/java/org/elasticsearch/index/mapper/internal/UidFieldMapper.java

@@ -107,9 +107,7 @@ public class UidFieldMapper extends AbstractFieldMapper implements RootMapper {
 
     static final class UidFieldType extends MappedFieldType {
 
-        public UidFieldType() {
+        public UidFieldType() {}
-            super(AbstractFieldMapper.Defaults.FIELD_TYPE);
-        }
 
         protected UidFieldType(UidFieldType ref) {
             super(ref);
@@ -120,6 +118,11 @@ public class UidFieldMapper extends AbstractFieldMapper implements RootMapper {
             return new UidFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public Uid value(Object value) {
             if (value == null) {

core/src/main/java/org/elasticsearch/index/mapper/internal/VersionFieldMapper.java

@@ -90,9 +90,7 @@ public class VersionFieldMapper extends AbstractFieldMapper implements RootMappe
 
     static final class VersionFieldType extends MappedFieldType {
 
-        public VersionFieldType() {
+        public VersionFieldType() {}
-            super(AbstractFieldMapper.Defaults.FIELD_TYPE);
-        }
 
         protected VersionFieldType(VersionFieldType ref) {
             super(ref);
@@ -103,6 +101,11 @@ public class VersionFieldMapper extends AbstractFieldMapper implements RootMappe
             return new VersionFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public Long value(Object value) {
             if (value == null || (value instanceof Long)) {

core/src/main/java/org/elasticsearch/index/mapper/ip/IpFieldMapper.java

@@ -173,6 +173,11 @@ public class IpFieldMapper extends NumberFieldMapper {
             return new IpFieldType(this);
         }
 
+        @Override
+        public String typeName() {
+            return CONTENT_TYPE;
+        }
+
         @Override
         public Long value(Object value) {
             if (value == null) {

core/src/test/java/org/elasticsearch/index/mapper/FieldTypeLookupTests.java

@@ -175,17 +175,31 @@ public class FieldTypeLookupTests extends ElasticsearchTestCase {
         return Lists.newArrayList(mapper);
     }
 
-    // this sucks how much must be overriden just do get a dummy field mapper...
+    // this sucks how much must be overridden just do get a dummy field mapper...
     static class FakeFieldMapper extends AbstractFieldMapper {
         static Settings dummySettings = Settings.builder().put(IndexMetaData.SETTING_VERSION_CREATED, Version.CURRENT.id).build();
         public FakeFieldMapper(String fullName, String indexName) {
             super(makeFieldType(fullName, indexName), null, null, dummySettings, null, null);
         }
         static MappedFieldType makeFieldType(String fullName, String indexName) {
-            MappedFieldType fieldType = Defaults.FIELD_TYPE.clone();
+            FakeFieldType fieldType = new FakeFieldType();
             fieldType.setNames(new MappedFieldType.Names(fullName, indexName, indexName, fullName));
             return fieldType;
         }
+        static class FakeFieldType extends MappedFieldType {
+            public FakeFieldType() {}
+            protected FakeFieldType(FakeFieldType ref) {
+                super(ref);
+            }
+            @Override
+            public MappedFieldType clone() {
+                return new FakeFieldType(this);
+            }
+            @Override
+            public String typeName() {
+                return "faketype";
+            }
+        }
         @Override
         public MappedFieldType defaultFieldType() { return null; }
         @Override

core/src/test/java/org/elasticsearch/index/mapper/FieldTypeTestCase.java

@@ -24,12 +24,21 @@ import org.elasticsearch.index.fielddata.FieldDataType;
 import org.elasticsearch.index.similarity.BM25SimilarityProvider;
 import org.elasticsearch.test.ElasticsearchTestCase;
 
+import java.util.ArrayList;
+import java.util.List;
+
 /** Base test case for subclasses of MappedFieldType */
 public abstract class FieldTypeTestCase extends ElasticsearchTestCase {
 
     /** Create a default constructed fieldtype */
     protected abstract MappedFieldType createDefaultFieldType();
 
+    MappedFieldType createNamedDefaultFieldType(String name) {
+        MappedFieldType fieldType = createDefaultFieldType();
+        fieldType.setNames(new MappedFieldType.Names(name));
+        return fieldType;
+    }
+
     /** A dummy null value to use when modifying null value */
     protected Object dummyNullValue() {
         return "dummyvalue";
@@ -79,7 +88,7 @@ public abstract class FieldTypeTestCase extends ElasticsearchTestCase {
     }
 
     public void testClone() {
-        MappedFieldType fieldType = createDefaultFieldType();
+        MappedFieldType fieldType = createNamedDefaultFieldType("foo");
         MappedFieldType clone = fieldType.clone();
         assertNotSame(clone, fieldType);
         assertEquals(clone.getClass(), fieldType.getClass());
@@ -87,7 +96,7 @@ public abstract class FieldTypeTestCase extends ElasticsearchTestCase {
         assertEquals(clone, clone.clone()); // transitivity
 
         for (int i = 0; i < numProperties(); ++i) {
-            fieldType = createDefaultFieldType();
+            fieldType = createNamedDefaultFieldType("foo");
             modifyProperty(fieldType, i);
             clone = fieldType.clone();
             assertNotSame(clone, fieldType);
@@ -96,15 +105,15 @@ public abstract class FieldTypeTestCase extends ElasticsearchTestCase {
     }
 
     public void testEquals() {
-        MappedFieldType ft1 = createDefaultFieldType();
+        MappedFieldType ft1 = createNamedDefaultFieldType("foo");
-        MappedFieldType ft2 = createDefaultFieldType();
+        MappedFieldType ft2 = createNamedDefaultFieldType("foo");
         assertEquals(ft1, ft1); // reflexive
         assertEquals(ft1, ft2); // symmetric
         assertEquals(ft2, ft1);
         assertEquals(ft1.hashCode(), ft2.hashCode());
 
         for (int i = 0; i < numProperties(); ++i) {
-            ft2 = createDefaultFieldType();
+            ft2 = createNamedDefaultFieldType("foo");
             modifyProperty(ft2, i);
             assertNotEquals(ft1, ft2);
             assertNotEquals(ft1.hashCode(), ft2.hashCode());
@@ -113,7 +122,7 @@ public abstract class FieldTypeTestCase extends ElasticsearchTestCase {
 
     public void testFreeze() {
         for (int i = 0; i < numProperties(); ++i) {
-            MappedFieldType fieldType = createDefaultFieldType();
+            MappedFieldType fieldType = createNamedDefaultFieldType("foo");
             fieldType.freeze();
             try {
                 modifyProperty(fieldType, i);
@@ -123,4 +132,36 @@ public abstract class FieldTypeTestCase extends ElasticsearchTestCase {
             }
         }
     }
+
+    public void testCheckTypeName() {
+        final MappedFieldType fieldType = createNamedDefaultFieldType("foo");
+        List<String> conflicts = new ArrayList<>();
+        fieldType.checkTypeName(fieldType, conflicts);
+        assertTrue(conflicts.toString(), conflicts.isEmpty());
+
+        MappedFieldType bogus = new MappedFieldType() {
+            @Override
+            public MappedFieldType clone() {return null;}
+            @Override
+            public String typeName() { return fieldType.typeName();}
+        };
+        try {
+            fieldType.checkTypeName(bogus, conflicts);
+            fail("expected bad types exception");
+        } catch (IllegalStateException e) {
+            assertTrue(e.getMessage().contains("Type names equal"));
+        }
+        assertTrue(conflicts.toString(), conflicts.isEmpty());
+
+        MappedFieldType other = new MappedFieldType() {
+            @Override
+            public MappedFieldType clone() {return null;}
+            @Override
+            public String typeName() { return "othertype";}
+        };
+        fieldType.checkTypeName(other, conflicts);
+        assertFalse(conflicts.isEmpty());
+        assertTrue(conflicts.get(0).contains("cannot be changed from type"));
+        assertEquals(1, conflicts.size());
+    }
 }

core/src/test/java/org/elasticsearch/index/mapper/MappedFieldTypeTests.java

@@ -1,27 +0,0 @@
-/*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you under
- * the Apache License, Version 2.0 (the "License"); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.elasticsearch.index.mapper;
-
-public class MappedFieldTypeTests extends FieldTypeTestCase {
-
-    @Override
-    public MappedFieldType createDefaultFieldType() {
-        return new MappedFieldType();
-    }
-}

core/src/test/java/org/elasticsearch/index/mapper/externalvalues/ExternalMapper.java

@@ -80,7 +80,7 @@ public class ExternalMapper extends AbstractFieldMapper {
         private String mapperName;
 
         public Builder(String name, String generatedValue, String mapperName) {
-            super(name, Defaults.FIELD_TYPE);
+            super(name, new ExternalFieldType());
             this.builder = this;
             this.stringBuilder = stringField(name).store(false);
             this.generatedValue = generatedValue;
@@ -142,6 +142,25 @@ public class ExternalMapper extends AbstractFieldMapper {
         }
     }
 
+    static class ExternalFieldType extends MappedFieldType {
+
+        public ExternalFieldType() {}
+
+        protected ExternalFieldType(ExternalFieldType ref) {
+            super(ref);
+        }
+
+        @Override
+        public MappedFieldType clone() {
+            return new ExternalFieldType(this);
+        }
+
+        @Override
+        public String typeName() {
+            return "faketype";
+        }
+    }
+
     private final String generatedValue;
     private final String mapperName;
 
@@ -168,7 +187,7 @@ public class ExternalMapper extends AbstractFieldMapper {
 
     @Override
     public MappedFieldType defaultFieldType() {
-        return Defaults.FIELD_TYPE;
+        return new ExternalFieldType();
     }
 
     @Override

core/src/test/java/org/elasticsearch/index/mapper/geo/GeoPointFieldTypeTests.java

@@ -20,6 +20,8 @@ package org.elasticsearch.index.mapper.geo;
 
 import org.elasticsearch.index.mapper.FieldTypeTestCase;
 import org.elasticsearch.index.mapper.MappedFieldType;
+import org.elasticsearch.index.mapper.core.DoubleFieldMapper;
+import org.elasticsearch.index.mapper.core.StringFieldMapper;
 
 public class GeoPointFieldTypeTests extends FieldTypeTestCase {
     @Override
@@ -36,8 +38,8 @@ public class GeoPointFieldTypeTests extends FieldTypeTestCase {
     protected void modifyProperty(MappedFieldType ft, int propNum) {
         GeoPointFieldMapper.GeoPointFieldType gft = (GeoPointFieldMapper.GeoPointFieldType)ft;
         switch (propNum) {
-            case 0: gft.setGeohashEnabled(new MappedFieldType(), 1, true); break;
+            case 0: gft.setGeohashEnabled(new StringFieldMapper.StringFieldType(), 1, true); break;
-            case 1: gft.setLatLonEnabled(new MappedFieldType(), new MappedFieldType()); break;
+            case 1: gft.setLatLonEnabled(new DoubleFieldMapper.DoubleFieldType(), new DoubleFieldMapper.DoubleFieldType()); break;
             case 2: gft.setValidateLon(!gft.validateLon()); break;
             case 3: gft.setValidateLat(!gft.validateLat()); break;
             case 4: gft.setNormalizeLon(!gft.normalizeLon()); break;