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      1 /*
      2  * Copyright (c) 2009-2010 jMonkeyEngine
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are
      7  * met:
      8  *
      9  * * Redistributions of source code must retain the above copyright
     10  *   notice, this list of conditions and the following disclaimer.
     11  *
     12  * * Redistributions in binary form must reproduce the above copyright
     13  *   notice, this list of conditions and the following disclaimer in the
     14  *   documentation and/or other materials provided with the distribution.
     15  *
     16  * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
     17  *   may be used to endorse or promote products derived from this software
     18  *   without specific prior written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
     28  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
     29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 package com.jme3.util.xml;
     34 
     35 import com.jme3.math.ColorRGBA;
     36 import com.jme3.math.Vector3f;
     37 import org.xml.sax.Attributes;
     38 import org.xml.sax.SAXException;
     39 
     40 /**
     41  * Utility methods for parsing XML data using SAX.
     42  */
     43 public final class SAXUtil {
     44 
     45     /**
     46      * Parses an integer from a string, if the string is null returns
     47      * def.
     48      *
     49      * @param i
     50      * @param def
     51      * @return
     52      * @throws SAXException
     53      */
     54     public static int parseInt(String i, int def) throws SAXException{
     55         if (i == null)
     56             return def;
     57         else{
     58             try {
     59                 return Integer.parseInt(i);
     60             } catch (NumberFormatException ex){
     61                 throw new SAXException("Expected an integer, got '"+i+"'");
     62             }
     63         }
     64     }
     65 
     66     public static int parseInt(String i) throws SAXException{
     67         if (i == null)
     68             throw new SAXException("Expected an integer");
     69         else{
     70             try {
     71                 return Integer.parseInt(i);
     72             } catch (NumberFormatException ex){
     73                 throw new SAXException("Expected an integer, got '"+i+"'");
     74             }
     75         }
     76     }
     77 
     78     public static float parseFloat(String f, float def) throws SAXException{
     79         if (f == null)
     80             return def;
     81         else{
     82             try {
     83                 return Float.parseFloat(f);
     84             } catch (NumberFormatException ex){
     85                 throw new SAXException("Expected a decimal, got '"+f+"'");
     86             }
     87         }
     88     }
     89 
     90     public static float parseFloat(String f) throws SAXException{
     91         if (f == null)
     92             throw new SAXException("Expected a decimal");
     93         else{
     94             try {
     95                 return Float.parseFloat(f);
     96             } catch (NumberFormatException ex){
     97                 throw new SAXException("Expected a decimal, got '"+f+"'");
     98             }
     99         }
    100     }
    101 
    102     public static boolean parseBool(String bool, boolean def) throws SAXException{
    103         if (bool == null || bool.equals(""))
    104             return def;
    105         else
    106             return Boolean.valueOf(bool);
    107         //else
    108         //else
    109         //    throw new SAXException("Expected a boolean, got'"+bool+"'");
    110     }
    111 
    112     public static String parseString(String str, String def){
    113         if (str == null)
    114             return def;
    115         else
    116             return str;
    117     }
    118 
    119     public static String parseString(String str) throws SAXException{
    120         if (str == null)
    121             throw new SAXException("Expected a string");
    122         else
    123             return str;
    124     }
    125 
    126     public static Vector3f parseVector3(Attributes attribs) throws SAXException{
    127         float x = parseFloat(attribs.getValue("x"));
    128         float y = parseFloat(attribs.getValue("y"));
    129         float z = parseFloat(attribs.getValue("z"));
    130         return new Vector3f(x,y,z);
    131     }
    132 
    133     public static ColorRGBA parseColor(Attributes attribs) throws SAXException{
    134         float r = parseFloat(attribs.getValue("r"));
    135         float g = parseFloat(attribs.getValue("g"));
    136         float b = parseFloat(attribs.getValue("b"));
    137         return new ColorRGBA(r, g, b, 1f);
    138     }
    139 
    140 }
    141