ExpressionFilter.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.file;
 
import java.io.File;
import java.io.FileFilter;
import org.zkoss.lang.Strings;
 
public class ExpressionFilter implements FileFilter {
 
  private boolean fullPath = false, partial = true,
          acceptOnNull = true, regularExpression = false;
  private String expression;
 
  @Override
  public boolean accept(File pathname) {
    if(expression == null) {
      return acceptOnNull;
    }
    String name = fullPath ? pathname.getAbsolutePath() : pathname.getName();
    String regExp = expression;
    if(!regularExpression) {
      regExp = regExp.replaceAll("\\*", ".*")
              .replaceAll("\\?", ".?");
    }
    if(partial) {
      regExp = ".*" + regExp + ".*";
    }
    return name.matches(regExp);
  }
 
  public boolean isEmpty() {
    return Strings.isEmpty(expression);
  }
 
  public boolean isAcceptOnNull() {
    return acceptOnNull;
  }
 
  public void setAcceptOnNull(boolean acceptOnNull) {
    this.acceptOnNull = acceptOnNull;
  }
 
  public String getExpression() {
    return expression;
  }
 
  public void setExpression(String expression) {
    this.expression = expression;
  }
 
  public boolean isFullPath() {
    return fullPath;
  }
 
  public void setFullPath(boolean fullPath) {
    this.fullPath = fullPath;
  }
 
  public boolean isPartial() {
    return partial;
  }
 
  public void setPartial(boolean partial) {
    this.partial = partial;
  }
 
  public boolean isRegularExpression() {
    return regularExpression;
  }
 
  public void setRegularExpression(boolean regularExpression) {
    this.regularExpression = regularExpression;
  }
 
}