1 files changed, 91 insertions, 0 deletions
diff --git a/config-model/src/main/java/com/yahoo/schema/document/ImmutableSDField.java b/config-model/src/main/java/com/yahoo/schema/document/ImmutableSDField.java
new file mode 100644
index 00000000000..44e442811ba
--- /dev/null
+++ b/config-model/src/main/java/com/yahoo/schema/document/ImmutableSDField.java
@@ -0,0 +1,91 @@
+// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.schema.document;
+
+import com.yahoo.document.DataType;
+import com.yahoo.document.Field;
+import com.yahoo.schema.Index;
+import com.yahoo.schema.Schema;
+import com.yahoo.vespa.documentmodel.SummaryField;
+import com.yahoo.vespa.indexinglanguage.expressions.Expression;
+import com.yahoo.vespa.indexinglanguage.expressions.ScriptExpression;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * An interface containing the non-mutating methods of {@link SDField}.
+ * For description of the methods see {@link SDField}.
+ *
+ * @author bjorncs
+ */
+public interface ImmutableSDField {
+
+    <T extends Expression> boolean containsExpression(Class<T> searchFor);
+
+    boolean doesAttributing();
+
+    boolean doesIndexing();
+
+    boolean doesLowerCasing();
+
+    boolean isExtraField();
+
+    boolean isImportedField();
+
+    boolean isIndexStructureField();
+
+    boolean usesStructOrMap();
+
+    /**
+     * Whether this field at some time was configured to do attributing.
+     *
+     * This function can typically return a different value than doesAttributing(),
+     * which uses the final state of the underlying indexing script instead.
+     */
+    boolean wasConfiguredToDoAttributing();
+
+    DataType getDataType();
+
+    Index getIndex(String name);
+
+    List<String> getQueryCommands();
+
+    Map<String, Attribute> getAttributes();
+
+    Attribute getAttribute();
+
+    Map<String, String> getAliasToName();
+
+    ScriptExpression getIndexingScript();
+
+    Matching getMatching();
+
+    NormalizeLevel getNormalizing();
+
+    ImmutableSDField getStructField(String name);
+
+    Collection<? extends ImmutableSDField> getStructFields();
+
+    Stemming getStemming();
+
+    Stemming getStemming(Schema schema);
+
+    Ranking getRanking();
+
+    String getName();
+
+    Map<String, SummaryField> getSummaryFields();
+
+    /** Returns a {@link Field} representation (which is sadly not immutable) */
+    Field asField();
+
+    boolean hasFullIndexingDocprocRights();
+    int getWeight();
+    int getLiteralBoost();
+    RankType getRankType();
+    Map<String, Index> getIndices();
+    boolean existsIndex(String name);
+    SummaryField getSummaryField(String name);
+    boolean hasIndex();
+}