/*
    * Copyright 2004-2025 the original author or authors.
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *    https://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.ibatis.common.xml;
  
  import java.util.Properties;
  
  import org.w3c.dom.NamedNodeMap;
  import org.w3c.dom.Node;
  
  /**
   * The Class NodeletUtils.
   */
  public class NodeletUtils {
  
    /**
     * Gets the boolean attribute.
     *
     * @param attribs
     *          the attribs
     * @param name
     *          the name
     * @param def
     *          the def
     *
     * @return the boolean attribute
     */
    public static boolean getBooleanAttribute(Properties attribs, String name, boolean def) {
      String value = attribs.getProperty(name);
      if (value == null) {
        return def;
      }
      return "true".equals(value);
    }
  
    /**
     * Gets the int attribute.
     *
     * @param attribs
     *          the attribs
     * @param name
     *          the name
     * @param def
     *          the def
     *
     * @return the int attribute
     */
    public static int getIntAttribute(Properties attribs, String name, int def) {
      String value = attribs.getProperty(name);
      if (value == null) {
        return def;
      }
      return Integer.parseInt(value);
    }
  
    /**
     * Parses the attributes.
     *
     * @param n
     *          the n
     *
     * @return the properties
     */
    public static Properties parseAttributes(Node n) {
      return parseAttributes(n, null);
    }
  
    /**
     * Parses the attributes.
     *
     * @param n
     *          the n
     * @param variables
     *          the variables
     *
     * @return the properties
     */
    public static Properties parseAttributes(Node n, Properties variables) {
      Properties attributes = new Properties();
      NamedNodeMap attributeNodes = n.getAttributes();
      for (int i = 0; i < attributeNodes.getLength(); i++) {
        Node attribute = attributeNodes.item(i);
        String value = parsePropertyTokens(attribute.getNodeValue(), variables);
        attributes.put(attribute.getNodeName(), value);
      }
      return attributes;
    }
 
   /**
    * Parses the property tokens.
    *
    * @param string
    *          the string
    * @param variables
    *          the variables
    *
    * @return the string
    */
   public static String parsePropertyTokens(String string, Properties variables) {
     final String OPEN = "${";
     final String CLOSE = "}";
 
     String newString = string;
     if (newString != null && variables != null) {
       int start = newString.indexOf(OPEN);
       int end = newString.indexOf(CLOSE);
 
       while (start > -1 && end > start) {
         String prepend = newString.substring(0, start);
         String append = newString.substring(end + CLOSE.length());
         String propName = newString.substring(start + OPEN.length(), end);
         String propValue = variables.getProperty(propName);
         if (propValue == null) {
           newString = prepend + propName + append;
         } else {
           newString = prepend + propValue + append;
         }
         start = newString.indexOf(OPEN);
         end = newString.indexOf(CLOSE);
       }
     }
     return newString;
   }
 
 }