+package org.apache.lucene.search.function;
+
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF 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.
+ */
+
+import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.search.FieldCache;
+
+import java.io.IOException;
+
+/**
+ * Holds all implementations of classes in the o.a.l.s.function package as a
+ * back-compatibility test. It does not run any tests per-se, however if
+ * someone adds a method to an interface or abstract method to an abstract
+ * class, one of the implementations here will fail to compile and so we know
+ * back-compat policy was violated.
+ */
+final class JustCompileSearchFunction {
+
+ private static final String UNSUPPORTED_MSG = "unsupported: used for back-compat testing only !";
+
+ static final class JustCompileDocValues extends DocValues {
+ @Override
+ public float floatVal(int doc) {
+ throw new UnsupportedOperationException(UNSUPPORTED_MSG);
+ }
+
+ @Override
+ public String toString(int doc) {
+ throw new UnsupportedOperationException(UNSUPPORTED_MSG);
+ }
+
+ }
+
+ static final class JustCompileFieldCacheSource extends FieldCacheSource {
+
+ public JustCompileFieldCacheSource(String field) {
+ super(field);
+ }
+
+ @Override
+ public boolean cachedFieldSourceEquals(FieldCacheSource other) {
+ throw new UnsupportedOperationException(UNSUPPORTED_MSG);
+ }
+
+ @Override
+ public int cachedFieldSourceHashCode() {
+ throw new UnsupportedOperationException(UNSUPPORTED_MSG);
+ }
+
+ @Override
+ public DocValues getCachedFieldValues(FieldCache cache, String field,
+ IndexReader reader) throws IOException {
+ throw new UnsupportedOperationException(UNSUPPORTED_MSG);
+ }
+
+ }
+
+ static final class JustCompileValueSource extends ValueSource {
+ @Override
+ public String description() {
+ throw new UnsupportedOperationException(UNSUPPORTED_MSG);
+ }
+
+ @Override
+ public boolean equals(Object o) {
+ throw new UnsupportedOperationException(UNSUPPORTED_MSG);
+ }
+
+ @Override
+ public DocValues getValues(IndexReader reader) throws IOException {
+ throw new UnsupportedOperationException(UNSUPPORTED_MSG);
+ }
+
+ @Override
+ public int hashCode() {
+ throw new UnsupportedOperationException(UNSUPPORTED_MSG);
+ }
+
+ }
+
+}