com.hazelcast.org.apache.calcite.sql.util.ChainedSqlOperatorTable 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 com.hazelcast.com.liance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.com.hazelcast.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.util;
import com.hazelcast.org.apache.calcite.sql.SqlFunctionCategory;
import com.hazelcast.org.apache.calcite.sql.SqlIdentifier;
import com.hazelcast.org.apache.calcite.sql.SqlOperator;
import com.hazelcast.org.apache.calcite.sql.SqlOperatorTable;
import com.hazelcast.org.apache.calcite.sql.SqlSyntax;
import com.hazelcast.org.apache.calcite.sql.validate.SqlNameMatcher;
import com.hazelcast.com.google.com.hazelcast.com.on.collect.ImmutableList;
import java.util.ArrayList;
import java.util.List;
/**
* ChainedSqlOperatorTable implements the {@link SqlOperatorTable} interface by
* chaining together any number of underlying operator table instances.
*/
public class ChainedSqlOperatorTable implements SqlOperatorTable {
//~ Instance fields --------------------------------------------------------
protected final List tableList;
//~ Constructors -----------------------------------------------------------
/**
* Creates a table based on a given list.
*/
public ChainedSqlOperatorTable(List tableList) {
this.tableList = ImmutableList.copyOf(tableList);
}
/** Creates a {@code ChainedSqlOperatorTable}. */
public static SqlOperatorTable of(SqlOperatorTable... tables) {
return new ChainedSqlOperatorTable(ImmutableList.copyOf(tables));
}
//~ Methods ----------------------------------------------------------------
/**
* Adds an underlying table. The order in which tables are added is
* significant; tables added earlier have higher lookup precedence. A table
* is not added if it is already on the list.
*
* @param table table to add
*/
public void add(SqlOperatorTable table) {
if (!tableList.contains(table)) {
tableList.add(table);
}
}
public void lookupOperatorOverloads(SqlIdentifier opName,
SqlFunctionCategory category, SqlSyntax syntax,
List operatorList, SqlNameMatcher nameMatcher) {
for (SqlOperatorTable table : tableList) {
table.lookupOperatorOverloads(opName, category, syntax, operatorList,
nameMatcher);
}
}
public List getOperatorList() {
List list = new ArrayList<>();
for (SqlOperatorTable table : tableList) {
list.addAll(table.getOperatorList());
}
return list;
}
}