AccountReportFormula.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2011 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.financials.report;
 
import java.util.List;
import org.turro.string.Strings;
import org.turro.script.Script;
 
public class AccountReportFormula {
 
  private AccountReport report;
  private String label, formula;
  private boolean percent = false;
  private final PeriodSet periods = new PeriodSet();
 
  public AccountReportFormula(String label) {
    this.label = label;
  }
 
  public String getFormula() {
    return formula;
  }
 
  public void setFormula(String formula) {
    this.formula = formula;
  }
 
  public String getLabel() {
    return label;
  }
 
  public void setLabel(String label) {
    this.label = label;
  }
 
  public boolean isPercent() {
    return percent;
  }
 
  public void setPercent(boolean percent) {
    this.percent = percent;
  }
 
  public AccountReport getReport() {
    return report;
  }
 
  public void setReport(AccountReport report) {
    this.report = report;
  }
 
  public double getValue(AccountReportPeriod period) {
    AccountReportPeriod p = periods.getPeriod(period);
    if(p == null) {
      p = new AccountReportPeriod(period.getYear(), period.getMonth());
      p.setValue(new Script().evalToDoubleOrZero(parseFormula(period)));
      periods.add(p);
    }
    return p.getValue();
  }
 
  private String parseFormula(AccountReportPeriod period) {
    String result = formula;
    List<String> items = Strings.extractAll(result, "\\@\\{([a-zA-Z0-9]+)\\}");
    for(String item : items) {
      result = result.replaceAll("\\@\\{" + item + "\\}", report.getItem(item).getAccumulatedFor(period) + "");
      result = result.replaceAll("--", "");
    }
    List<String> formulas = Strings.extractAll(result, "\\@F\\{([a-zA-Z0-9]+)\\}");
    for(String form : formulas) {
      result = result.replaceAll("\\@F\\{" + form + "\\}", report.getFormula(form).getValue(period) + "");
      result = result.replaceAll("--", "");
    }
    return result;
  }
 
}