/*--
     
      Copyright (C) 2000-2012 Jason Hunter & Brett McLaughlin.
      All rights reserved.
     
      Redistribution and use in source and binary forms, with or without
      modification, are permitted provided that the following conditions
      are met:
     
      1. Redistributions of source code must retain the above copyright
         notice, this list of conditions, and the following disclaimer.
     
      2. Redistributions in binary form must reproduce the above copyright
         notice, this list of conditions, and the disclaimer that follows
         these conditions in the documentation and/or other materials
         provided with the distribution.
     
      3. The name "JDOM" must not be used to endorse or promote products
         derived from this software without prior written permission.  For
         written permission, please contact <request_AT_jdom_DOT_org>.
     
      4. Products derived from this software may not be called "JDOM", nor
         may "JDOM" appear in their name, without prior written permission
         from the JDOM Project Management <request_AT_jdom_DOT_org>.
     
      In addition, we request (but do not require) that you include in the
      end-user documentation provided with the redistribution and/or in the
      software itself an acknowledgement equivalent to the following:
          "This product includes software developed by the
           JDOM Project (http://www.jdom.org/)."
      Alternatively, the acknowledgment may be graphical using the logos
      available at http://www.jdom.org/images/logos.
     
      THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
      WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
      OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
      DISCLAIMED.  IN NO EVENT SHALL THE JDOM AUTHORS OR THE PROJECT
      CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
      LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
      USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
      ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
      OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
      OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      SUCH DAMAGE.
     
      This software consists of voluntary contributions made by many
      individuals on behalf of the JDOM Project and was originally
      created by Jason Hunter <jhunter_AT_jdom_DOT_org> and
      Brett McLaughlin <brett_AT_jdom_DOT_org>.  For more information
      on the JDOM Project, please see <http://www.jdom.org/>.
     
      */
     
     
     
     import java.util.*;
     
     import org.jdom2.*;
     import org.jdom2.filter.ElementFilter;
     import org.jdom2.filter.Filters;
     import org.jdom2.input.*;
     import org.jdom2.output.*;
     
     /**
      * Demonstrates the use of {@link Parent#getDescendants}.
      */
     @SuppressWarnings("javadoc")
     public class DescendantDemo {
     
         public static void main(String[] args) throws Exception {
             if (args.length == 0) {
                 System.err.println(
                 		"Usage: java DescendantDemo file1.xml [file2.xml ... ]");
                 return;
             }
     
             final SAXBuilder builder = new SAXBuilder();
             for (final String fname : args) {
             	System.out.println("Processing file " + fname);
             	// The String argument is considered to be a SystemID which can
             	// be a URL, File name, a relative file path, etc.
                 final Document doc = builder.build(fname);
     
                 System.out.println("All content:");
                 Iterator<? extends Content> itr = doc.getDescendants();
                 while (itr.hasNext()) {
                     Content c = itr.next();
                     // c.toString() gives a very brief output.
                     System.out.println(c.toString());
                 }
     
                 System.out.println();
                 System.out.println("Only elements:");
                 itr = doc.getDescendants(new ElementFilter());
                 while (itr.hasNext()) {
                     Content c = itr.next();
                     System.out.println(c);
                 }
     
                 System.out.println();
                 System.out.println("Everything that's not an element:");
                 itr = doc.getDescendants(new ElementFilter().negate().refine(Filters.content()));
                 while (itr.hasNext()) {
                     Content c = itr.next();
                     System.out.println(c);
                 }
     
                 System.out.println();
                 System.out.println("Only elements with localname of 'servlet':");
                 itr = doc.getDescendants(new ElementFilter("servlet"));
                 while (itr.hasNext()) {
                     Content c = itr.next();
                     System.out.println(c);
                 }
     
                 System.out.println();
                 System.out.println(
                      "Only elements with localname of servlet-name or servlet-class:");
                 itr = doc.getDescendants(new ElementFilter("servlet-name")
                                          .or(new ElementFilter("servlet-class")));
                 while (itr.hasNext()) {
                     Content c = itr.next();
                     System.out.println(c);
                 }
     
                 System.out.println();
                 System.out.println("Remove elements with localname of servlet:");
                 Iterator<Element>ite = doc.getDescendants(new ElementFilter("servlet"));
                 while (ite.hasNext()) {
                     Element e = ite.next();
                     System.out.println(e);
                     ite.remove();
                 }
     
                 System.out.println();
                 System.out.println("Dump the remaining document to console:");
                 XMLOutputter outp = new XMLOutputter();
                 outp.output(doc, System.out);
                 System.out.println();
                 System.out.println();
             }
         }
     }