/*
    *    Copyright 2016-2025 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
    *
    *       https://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.mybatis.dynamic.sql.select.function;
  
  import org.mybatis.dynamic.sql.BasicColumn;
  import org.mybatis.dynamic.sql.BindableColumn;
  import org.mybatis.dynamic.sql.render.RenderingContext;
  import org.mybatis.dynamic.sql.util.FragmentAndParameters;
  
  public class Substring<T> extends AbstractUniTypeFunction<T, Substring<T>> {
  
      private final int offset;
      private final int length;
  
      private Substring(BasicColumn column, int offset, int length) {
          super(column);
          this.offset = offset;
          this.length = length;
      }
  
      @Override
      public FragmentAndParameters render(RenderingContext renderingContext) {
          return column.render(renderingContext).mapFragment(s -> "substring(" //$NON-NLS-1$
                  + s
                  + ", " //$NON-NLS-1$
                  + offset
                  + ", " //$NON-NLS-1$
                  + length
                  + ")"); //$NON-NLS-1$
      }
  
      @Override
      protected Substring<T> copy() {
          return new Substring<>(column, offset, length);
      }
  
      public static <T> Substring<T> of(BindableColumn<T> column, int offset, int length) {
          return new Substring<>(column, offset, length);
      }
  }