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/*
 * Copyright 2015, The Querydsl Team (http://www.querydsl.com/team)
 *
 * Licensed 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.querydsl.sql;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.LinkedHashSet;
import java.util.Set;
import java.util.stream.Collectors;

/** Defines reserved keywords for the supported dialects */
public final class Keywords {

  private Keywords() {}

  private static Set readLines(String path) {
    try (var bufferedReader =
        new BufferedReader(
            new InputStreamReader(Keywords.class.getResourceAsStream("/keywords/" + path))); ) {
      return bufferedReader
          .lines()
          .filter(line -> !line.isEmpty() && !line.startsWith("#"))
          .collect(Collectors.toCollection(LinkedHashSet::new));
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }

  public static final Set DEFAULT = readLines("default");

  public static final Set CUBRID = readLines("cubrid");
  public static final Set DB2 = readLines("db2");
  public static final Set DERBY = readLines("derby");
  public static final Set FIREBIRD = readLines("firebird");
  public static final Set H2 = readLines("h2");
  public static final Set HSQLDB = readLines("hsqldb");
  public static final Set MYSQL = readLines("mysql");
  public static final Set ORACLE = readLines("oracle");
  public static final Set POSTGRESQL = readLines("postgresql");
  public static final Set SQLITE = readLines("sqlite");
  public static final Set SQLSERVER2005 = readLines("sqlserver2005");
  public static final Set SQLSERVER2008 = readLines("sqlserver2008");
  public static final Set SQLSERVER2012 = readLines("sqlserver2012");
}




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