SQLUtil.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2020 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
package org.turro.sql;
 
import java.util.List;
import org.turro.string.Strings;
import org.turro.elephant.db.SQLHelper;
import org.turro.elephant.db.WhereClause;
import org.turro.elephant.entities.db.Synonyms;
 
public class SQLUtil {
  
  public static final int
          MAX_SYNONIMS = 10;
 
  public static void applySearchToQuery(String search, WhereClause wc, List<String> fields) {
    applySearchToQuery(search, wc, fields, false, false);
  }
  
  public static void applySearchToQuery(String search, WhereClause wc, List<String> fields, boolean withSynonyms) {
    applySearchToQuery(search, wc, fields, withSynonyms, false);
  }
  
  public static void applySearchToQuery(String search, WhereClause wc, List<String> fields, boolean withSynonyms, boolean orEd) {
    String sep = "";
    wc.addClause(orEd ? "or (" : "and (");
    for(String field : fields) {
      wc.addClause(sep + field + " like :search01");
      sep = "or ";
    }
    wc.addNamedValue("search01", SQLHelper.convertToPartialLike(search));
    if(withSynonyms) {
      List<Synonyms> synonyms = Synonyms.getSynonymsByWords(search);
      if(!synonyms.isEmpty() && synonyms.size() <= MAX_SYNONIMS) {
        for(Synonyms s : synonyms) {
          for(String field : fields) {
            for(String w : s.getWords()) {
              wc.addClause(sep + field + " like :w" + Strings.identifier(w));
              sep = "or ";
              wc.addNamedValue("w" + Strings.identifier(w), SQLHelper.convertToPartialLike(w));
            }
          }
        }
      }
    }
    wc.addClause(")");
  }
  
  public static void applyFullsearchToQuery(String search, WhereClause wc, String fields) {
    applyFullsearchToQuery(search, wc, fields, false, false);
  }
  
  public static void applyFullsearchToQuery(String search, WhereClause wc, String fields, boolean withSynonyms) {
    applyFullsearchToQuery(search, wc, fields, withSynonyms, false);
  }
  
  public static void applyFullsearchToQuery(String search, WhereClause wc, String fields, boolean withSynonyms, boolean orEd) {
    if(withSynonyms) {
      List<Synonyms> synonyms = Synonyms.getSynonymsByWords(search);
      if(!synonyms.isEmpty() && synonyms.size() <= MAX_SYNONIMS) {
        for(Synonyms s : synonyms) {
          for(String w : s.getWords()) {
            if(!search.toLowerCase().contains(w.toLowerCase())) {
              search += " " + w;
            }
          }
        }
      }
    }
    wc.addClause(orEd ? "or (" : "and (");
    wc.addClause("match(" + fields + ") against (:fsearch01)");
    wc.setOrderByClause("match(" + fields + ") against (:fsearch01) desc");
    wc.addNamedValue("fsearch01", search);
    wc.addClause(")");
    wc.setUseNative(true);
  }
 
  private SQLUtil() {
  }
  
}