danny0405 commented on a change in pull request #1875: [CALCITE-3873] Use
global caching for ReflectiveVisitDispatcher implementation
URL: https://github.com/apache/calcite/pull/1875#discussion_r398586118
##
File path:
core/src/main/java/org/apache/calcite/util/ReflectVisitDispatcherImpl.java
##
@@ -0,0 +1,124 @@
+/*
+ * 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.
+ */
+package org.apache.calcite.util;
+
+import org.apache.calcite.config.CalciteSystemProperty;
+
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
+import com.google.common.collect.ImmutableList;
+
+import java.lang.reflect.Method;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Looking up methods relating to reflective visitation. Caching reflect
+ * method globally, every instance of the class shares the global cache to
+ * mitigating java reflection invocation overhead.
+ *
Review comment:
Use mitigate as a verb
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