com.hazelcast.org.apache.calcite.sql.validate.SqlNameMatcher Maven / Gradle / Ivy
/*
* 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 com.hazelcast.org.apache.calcite.sql.validate;
import com.hazelcast.org.apache.calcite.rel.type.RelDataType;
import com.hazelcast.org.apache.calcite.rel.type.RelDataTypeField;
import com.hazelcast.com.google.common.collect.ImmutableList;
import com.hazelcast.com.google.common.collect.Iterables;
import com.hazelcast.org.checkerframework.checker.nullness.qual.Nullable;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* Checks whether two names are the same according to a case-sensitivity policy.
*
* @see SqlNameMatchers
*/
public interface SqlNameMatcher {
/** Returns whether name matching is case-sensitive. */
boolean isCaseSensitive();
/** Returns a name matches another.
*
* @param string Name written in code
* @param name Name of object we are trying to match
* @return Whether matches
*/
boolean matches(String string, String name);
/** Looks up an item in a map. */
, V> @Nullable V get(Map map, List prefixNames,
List names);
/** Returns the most recent match.
*
* In the default implementation,
* throws {@link UnsupportedOperationException}. */
String bestString();
/** Finds a field with a given name, using the current case-sensitivity,
* returning null if not found.
*
* @param rowType Row type
* @param fieldName Field name
* @return Field, or null if not found
*/
@Nullable RelDataTypeField field(RelDataType rowType, String fieldName);
/** Returns how many times a string occurs in a collection.
*
*
Similar to {@link java.util.Collections#frequency}. */
int frequency(Iterable names, String name);
/** Returns a copy of a collection, removing duplicates and retaining
* iteration order. */
default List distinctCopy(Iterable names) {
final ImmutableList.Builder list = ImmutableList.builder();
final Set set = createSet();
for (String name : names) {
if (set.add(name)) {
list.add(name);
}
}
return list.build();
}
/** Returns the index of the first element of a collection that matches. */
default int indexOf(Iterable names, String name) {
return Iterables.indexOf(names, n -> matches(n, name));
}
/** Creates a set that has the same case-sensitivity as this matcher. */
Set createSet();
}