/*
    * Copyright 2012-2025 CodeLibs Project and the Others.
    *
    * 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.codelibs.fess.app.pager;
  
  import java.io.Serializable;
  import java.util.List;
  
  import org.codelibs.fess.util.ComponentUtil;
  
  /**
   * Pager class for request header management in the Fess search engine.
   * This class provides pagination functionality for displaying and managing
   * request headers in the administration interface.
   */
  public class ReqHeaderPager implements Serializable {
  
      private static final long serialVersionUID = 1L;
  
      /**
       * Default number of records to display per page.
       */
      public static final int DEFAULT_PAGE_SIZE = 20;
  
      /**
       * Default current page number for pagination.
       */
      public static final int DEFAULT_CURRENT_PAGE_NUMBER = 1;
  
      /**
       * The total number of records in the result set.
       */
      private int allRecordCount;
  
      /**
       * The total number of pages available for pagination.
       */
      private int allPageCount;
  
      /**
       * Indicates whether a previous page exists for pagination.
       */
      private boolean existPrePage;
  
      /**
       * Indicates whether a next page exists for pagination.
       */
      private boolean existNextPage;
  
      /**
       * The list of page numbers to display for pagination navigation.
       */
      private List<Integer> pageNumberList;
  
      /**
       * The number of records to display per page.
       */
      private int pageSize;
  
      /**
       * The current page number for pagination.
       */
      private int currentPageNumber;
  
      /**
       * The unique identifier of the request header.
       */
      public String id;
  
      /**
       * The name of the request header.
       */
      public String name;
  
      /**
       * The value of the request header.
       */
      public String value;
  
      /**
       * The web configuration ID associated with this request header.
       */
      public String webConfigId;
  
      /**
       * The user who created this request header.
       */
     public String createdBy;
 
     /**
      * The timestamp when this request header was created.
      */
     public String createdTime;
 
     /**
      * The version number for optimistic locking.
      */
     public String versionNo;
 
     /**
      * Default constructor for ReqHeaderPager.
      * Initializes the pager with default values for page size and current page number.
      */
     public ReqHeaderPager() {
         // Default constructor - initialization handled by field defaults and clear() method
     }
 
     /**
      * Clears all pager data and resets to default values.
      * This method resets pagination state and clears all request header fields.
      */
     public void clear() {
         allRecordCount = 0;
         allPageCount = 0;
         existPrePage = false;
         existNextPage = false;
         pageSize = getDefaultPageSize();
         currentPageNumber = getDefaultCurrentPageNumber();
 
         id = null;
         name = null;
         value = null;
         webConfigId = null;
         createdBy = null;
         createdTime = null;
         versionNo = null;
 
     }
 
     /**
      * Gets the default current page number.
      *
      * @return the default current page number
      */
     protected int getDefaultCurrentPageNumber() {
         return DEFAULT_CURRENT_PAGE_NUMBER;
     }
 
     /**
      * Gets the total number of records in the result set.
      *
      * @return the total record count
      */
     public int getAllRecordCount() {
         return allRecordCount;
     }
 
     /**
      * Sets the total number of records in the result set.
      *
      * @param allRecordCount the total record count to set
      */
     public void setAllRecordCount(final int allRecordCount) {
         this.allRecordCount = allRecordCount;
     }
 
     /**
      * Gets the total number of pages available for pagination.
      *
      * @return the total page count
      */
     public int getAllPageCount() {
         return allPageCount;
     }
 
     /**
      * Sets the total number of pages available for pagination.
      *
      * @param allPageCount the total page count to set
      */
     public void setAllPageCount(final int allPageCount) {
         this.allPageCount = allPageCount;
     }
 
     /**
      * Checks if a previous page exists for pagination.
      *
      * @return true if a previous page exists, false otherwise
      */
     public boolean isExistPrePage() {
         return existPrePage;
     }
 
     /**
      * Sets the flag indicating whether a previous page exists.
      *
      * @param existPrePage true if a previous page exists, false otherwise
      */
     public void setExistPrePage(final boolean existPrePage) {
         this.existPrePage = existPrePage;
     }
 
     /**
      * Checks if a next page exists for pagination.
      *
      * @return true if a next page exists, false otherwise
      */
     public boolean isExistNextPage() {
         return existNextPage;
     }
 
     /**
      * Sets the flag indicating whether a next page exists.
      *
      * @param existNextPage true if a next page exists, false otherwise
      */
     public void setExistNextPage(final boolean existNextPage) {
         this.existNextPage = existNextPage;
     }
 
     /**
      * Gets the number of records to display per page.
      * If not set or invalid, returns the default page size.
      *
      * @return the page size
      */
     public int getPageSize() {
         if (pageSize <= 0) {
             pageSize = getDefaultPageSize();
         }
         return pageSize;
     }
 
     /**
      * Sets the number of records to display per page.
      *
      * @param pageSize the page size to set
      */
     public void setPageSize(final int pageSize) {
         this.pageSize = pageSize;
     }
 
     /**
      * Gets the current page number being displayed.
      * If not set or invalid, returns the default current page number.
      *
      * @return the current page number
      */
     public int getCurrentPageNumber() {
         if (currentPageNumber <= 0) {
             currentPageNumber = getDefaultCurrentPageNumber();
         }
         return currentPageNumber;
     }
 
     /**
      * Sets the current page number being displayed.
      *
      * @param currentPageNumber the current page number to set
      */
     public void setCurrentPageNumber(final int currentPageNumber) {
         this.currentPageNumber = currentPageNumber;
     }
 
     /**
      * Gets the list of page numbers for pagination navigation.
      *
      * @return the list of page numbers
      */
     public List<Integer> getPageNumberList() {
         return pageNumberList;
     }
 
     /**
      * Sets the list of page numbers for pagination navigation.
      *
      * @param pageNumberList the list of page numbers to set
      */
     public void setPageNumberList(final List<Integer> pageNumberList) {
         this.pageNumberList = pageNumberList;
     }
 
     /**
      * Gets the default page size from system configuration.
      *
      * @return the default page size
      */
     protected int getDefaultPageSize() {
         return ComponentUtil.getFessConfig().getPagingPageSizeAsInteger();
     }
 
 }