Path.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.configuration;
 
import java.util.ArrayList;
import java.util.List;
import org.jdom.Content;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.xpath.XPath;
 
public abstract class Path {
 
  protected String nodes[];
  protected Document doc;
 
  public Path(String path) {
    if(path.startsWith("/")) {
      nodes = path.substring(1).split("/");
    } else {
      nodes = path.split("/");
    }
  }
 
  public Path(String[] nodes) {
    this.nodes = nodes;
  }
 
  public Document getDoc() {
    return doc;
  }
 
  public void setDoc(Document doc) {
    this.doc = doc;
  }
 
  public Element getNode(boolean create) throws JDOMException {
    Element curr = doc.getRootElement();
    int count = 0;
    for(String node : nodes) {
      Element tmp = (Element) XPath.selectSingleNode(curr, node);
      if(tmp == null && create) {
        tmp = createNode(curr, node, count);
      }
      if(tmp == null) return null;
      curr = tmp;
      count++;
    }
    return curr;
  }
 
  public void delNode(String path) throws JDOMException {
    Object obj = XPath.selectSingleNode(doc.getRootElement(), path);
    if(obj instanceof Content) {
      ((Content) obj).detach();
    }
  }
 
  public List<String> getChildrenValue(String element, String name) throws JDOMException {
    ArrayList<String> list = new ArrayList<String>();
    Element el = getNode(true);
    for(Element cel : (List<Element>) el.getChildren(element)) {
      list.add(cel.getAttributeValue(name));
    }
    return list;
  }
 
  public List<String[]> getChildrenValues(String element, String names[]) throws JDOMException {
    ArrayList<String[]> list = new ArrayList<String[]>();
    Element el = getNode(true);
    for(Element cel : (List<Element>) el.getChildren(element)) {
      ArrayList<String> l = new ArrayList<String>();
      for(int i = 0; i < names.length; i++) {
        l.add(cel.getAttributeValue(names[i]));
      }
      list.add(l.toArray(new String[0]));
    }
    return list;
  }
 
  public String getNodeValue(String name) throws JDOMException {
    Element el = getNode(true);
    return el.getAttributeValue(name);
  }
 
  public String[] getNodeValues(String names[]) throws JDOMException {
    Element el = getNode(true);
    ArrayList<String> l = new ArrayList<String>();
    for(int i = 0; i < names.length; i++) {
      l.add(el.getAttributeValue(names[i]));
    }
    return l.toArray(new String[0]);
  }
 
  public void setChildrenValue(String element, String name, List<String> values) throws JDOMException {
    Element el = getNode(true);
    el.removeContent();
    for(String v : values) {
      Element nel = new Element(element);
      nel.setAttribute(name, v);
      el.addContent(nel);
    }
  }
 
  public void setChildrenValues(String element, String names[], List<String[]> values) throws JDOMException {
    Element el = getNode(true);
    el.removeContent();
    for(String[] vs : values) {
      Element nel = new Element(element);
      for(int i = 0; i < names.length; i++) {
        nel.setAttribute(names[i], vs[i]);
      }
      el.addContent(nel);
    }
  }
 
  public void setNodeValue(String name, String value) throws JDOMException {
    Element el = getNode(true);
    el.setAttribute(name, value);
  }
 
  public void setNodeValues(String names[], String[] values) throws JDOMException {
    Element el = getNode(true);
    for(int i = 0; i < names.length; i++) {
      el.setAttribute(names[i], values[i]);
    }
  }
 
  protected abstract Element createNode(Element root, String path, int index);
 
}