/*
    *    Copyright 2009-2021 the original author or authors.
    *
    *    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 org.apache.ibatis.scripting.defaults;
  
  import java.util.HashMap;
  
  import org.apache.ibatis.builder.SqlSourceBuilder;
  import org.apache.ibatis.mapping.BoundSql;
  import org.apache.ibatis.mapping.SqlSource;
  import org.apache.ibatis.scripting.xmltags.DynamicContext;
  import org.apache.ibatis.scripting.xmltags.DynamicSqlSource;
  import org.apache.ibatis.scripting.xmltags.SqlNode;
  import org.apache.ibatis.session.Configuration;
  
  /**
   * Static SqlSource. It is faster than {@link DynamicSqlSource} because mappings are
   * calculated during startup.
   *
   * @since 3.2.0
   * @author Eduardo Macarron
   */
  public class RawSqlSource implements SqlSource {
  
    private final SqlSource sqlSource;
  
    public RawSqlSource(Configuration configuration, SqlNode rootSqlNode, Class<?> parameterType) {
      this(configuration, getSql(configuration, rootSqlNode), parameterType);
    }
  
    public RawSqlSource(Configuration configuration, String sql, Class<?> parameterType) {
      SqlSourceBuilder sqlSourceParser = new SqlSourceBuilder(configuration);
      Class<?> clazz = parameterType == null ? Object.class : parameterType;
      sqlSource = sqlSourceParser.parse(sql, clazz, new HashMap<>());
    }
  
    private static String getSql(Configuration configuration, SqlNode rootSqlNode) {
      DynamicContext context = new DynamicContext(configuration, null);
      rootSqlNode.apply(context);
      return context.getSql();
    }
  
    @Override
    public BoundSql getBoundSql(Object parameterObject) {
      return sqlSource.getBoundSql(parameterObject);
    }
  
  }