StringList.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2019 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.fieldit;
 
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.nio.charset.Charset;
import java.util.HashSet;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.stream.Collectors;
import org.turro.string.Strings;
import org.turro.contacts.FieldIt;
import org.turro.elephant.context.ElephantContext;
 
public class StringList {
 
  private static final String FIELDS_ROOT = "/WEB-INF/fields";    
 
  private String value;
  private FieldIt field;
 
  public String getValue() {
    return value;
  }
 
  public void setValue(String value) {
    this.value = value;
  }
 
  public FieldIt getField() {
    return field;
  }
 
  public void setField(FieldIt field) {
    this.field = field;
  }
  
  public Set<String> getPossibleValues() {
    Set<String> set = new HashSet<>();
 
    try (BufferedReader br = new BufferedReader(new FileReader(getValueFile(), Charset.forName(ElephantContext.getEncoding())))) {
      set = br.lines().filter(line -> !Strings.isBlank(line)).collect(Collectors.toSet());
    } catch (IOException ex) {
      Logger.getLogger(StringList.class.getName()).log(Level.SEVERE, ElephantContext.logMsg(null), ex);
    }
    
    return set;
  }
 
  public void setPossibleValues(Set<String> values) {
    try (PrintWriter pw = new PrintWriter(new FileWriter(getValueFile(), Charset.forName(ElephantContext.getEncoding())))) {
      values.forEach((line) -> {
        if(!Strings.isBlank(line)) pw.println(line);
      });
    } catch (IOException ex) {
      Logger.getLogger(StringList.class.getName()).log(Level.SEVERE, null, ex);
    }
  }
 
  public File getValueFile() {
    return getValueFile(field);
  }
    
  public static File getValueFile(FieldIt field) {
    File root = new File(ElephantContext.getRealPath(FIELDS_ROOT));
    if(!root.exists()) root.mkdir();
    return new File(
            ElephantContext.getRealPath(FIELDS_ROOT + "/" + Strings.toFile(field.getName())) + 
            "_" + field.getId());
  }
    
}