IfModule.java :  » Content-Management-System » meshcms » org » meshcms » taglib » Java Open Source

/*
 * MeshCMS - A simple CMS based on SiteMesh
 * Copyright (C) 2004-2007 Luciano Vernaschi
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * You can contact the author at http://www.cromoteca.com
 * and at info@cromoteca.com
 */

package org.meshcms.taglib;

import java.io.*;

/**
 * This tag allows its contents to be written only when the module indicated
 * by the given location is <em>not</em> empty.
 */
public class IfModule extends AbstractTag {
  private String location = "";

  public void setLocation(String location) {
    this.location = location;
  }

  public String getLocation() {
    return location;
  }

  public void writeTag() throws IOException {
    // nothing to do here
  }

  public int getStartTagReturnValue() {
    return (isEdit || getModuleDescriptor(location, null) != null) ?
        EVAL_BODY_INCLUDE : SKIP_BODY;
  }
}