Android Open Source - ColorWallpaper Xml Helper

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License

The source code is released under:
Licensed under the Expat License. Copyright (C) 2013 Peter Occil Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the...
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Java Source Code

package com.upokecenter.util;
/*w w  w  . ja v a2  s.c o m*/
import java.io.IOException;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

public final class XmlHelper
{

  private XmlHelper(){}

  private static boolean isNullOrEmpty(String s){
    return s==null || s.length()==0;
  }

  public static String GetFullName(XmlPullParser reader){
    if(reader.getPrefix()!=null)
      return reader.getPrefix()+":"+reader.getName();
    return reader.getName();
  }
  private static boolean StringEquals(String s1, String s2){
    if(s1==s2)return true;
    if(s1==null||s2==null)return false;
    return s1.equals(s2);
  }
  public static boolean IsName(XmlPullParser reader, String namespaceName, String localName){
    if(reader==null)throw new NullPointerException();
    String ns=reader.getNamespace();
    if(isNullOrEmpty(ns)) {
      ns=null;
    }
    if(isNullOrEmpty(namespaceName)) {
      namespaceName=null;
    }
    return (StringEquals(ns,namespaceName)) &&
        (isNullOrEmpty(localName) ||
            StringEquals(reader.getName(),localName));
  }
  public static boolean IsEndElement(XmlPullParser reader) throws XmlPullParserException{
    if(reader==null)throw new NullPointerException();
    return IsEndElement(reader,null);
  }
  public static boolean IsEndElement(XmlPullParser reader, String name) throws XmlPullParserException{
    if(reader==null)throw new NullPointerException();
    return (reader.getEventType()==XmlPullParser.END_TAG) &&
        (isNullOrEmpty(name) || StringEquals(GetFullName(reader),name));
  }
  public static boolean IsEndElement(XmlPullParser reader, String namespaceName, String localName) throws XmlPullParserException{
    if(reader==null)throw new NullPointerException();
    return (reader.getEventType()==XmlPullParser.END_TAG)
        && IsName(reader,namespaceName,localName);
  }
  public static boolean IsElement(XmlPullParser reader) throws XmlPullParserException{
    if(reader==null)throw new NullPointerException();
    return reader.getEventType()==XmlPullParser.START_TAG;
  }
  public static boolean IsElement(XmlPullParser reader, String name) throws XmlPullParserException{
    if(reader==null)throw new NullPointerException();
    return reader.getEventType()==XmlPullParser.START_TAG &&
        (isNullOrEmpty(name) || StringEquals(GetFullName(reader),name));
  }
  public static boolean IsElement(XmlPullParser reader, String namespaceName, String localName)
      throws XmlPullParserException{
    if(reader==null)throw new NullPointerException();
    return reader.getEventType()==XmlPullParser.START_TAG && IsName(reader,namespaceName,localName);
  }
  public static boolean IsStartElement(XmlPullParser reader) throws XmlPullParserException, IOException{
    if(reader==null)throw new NullPointerException();
    MoveToContent(reader);
    return reader.getEventType()==XmlPullParser.START_TAG;
  }
  public static boolean IsStartElement(XmlPullParser reader, String name) throws XmlPullParserException, IOException{
    if(reader==null)throw new NullPointerException();
    MoveToContent(reader);
    return reader.getEventType()==XmlPullParser.START_TAG &&
        (isNullOrEmpty(name) || StringEquals(GetFullName(reader),name));
  }
  public static boolean IsStartElement(XmlPullParser reader, String namespaceName, String localName) throws XmlPullParserException, IOException{
    if(reader==null)throw new NullPointerException();
    MoveToContent(reader);
    return reader.getEventType()==XmlPullParser.START_TAG && IsName(reader,namespaceName,localName);
  }

  public static int GetDepth(XmlPullParser reader){
    if(reader==null)throw new NullPointerException();
    return Math.max(reader.getDepth()-1,0);
  }

  // Similar to ReadElementString, but reads up to the
  // end element tag instead of past it.
  public static String ReadSubtreeString(XmlPullParser reader)
      throws XmlPullParserException, IOException {
    if(reader==null)throw new NullPointerException();
    // Return if not on a start element tag
    if(reader.getEventType()!=XmlPullParser.START_TAG)
      return "";
    StringBuilder builder=new StringBuilder();
    int depth=GetDepth(reader);
    while(GetDepth(reader)!=depth || reader.getEventType()!=XmlPullParser.END_TAG){
      reader.next();
      if(reader.getEventType()!=XmlPullParser.END_TAG){
        if(reader.getEventType()==XmlPullParser.ENTITY_REF||
            reader.getEventType()==XmlPullParser.CDSECT||
            reader.getEventType()==XmlPullParser.TEXT){
          builder.append(reader.getText());
        }
      }
    }
    return builder.toString();
  }

  public static boolean Read(XmlPullParser parser) throws XmlPullParserException, IOException{
    if(parser==null)throw new NullPointerException();
    if(parser.getEventType()==XmlPullParser.END_DOCUMENT)
      return false;
    parser.nextToken();
    return true;
  }
  public static int MoveToContent(XmlPullParser parser) throws XmlPullParserException, IOException{
    if(parser==null)throw new NullPointerException();
    while(parser.getEventType()==XmlPullParser.PROCESSING_INSTRUCTION ||
        parser.getEventType()==XmlPullParser.DOCDECL ||
        parser.getEventType()==XmlPullParser.IGNORABLE_WHITESPACE ||
        parser.getEventType()==XmlPullParser.START_DOCUMENT){
      if(!Read(parser)){
        break;
      }
    }
    return parser.getEventType();
  }
  public static String XmlEscape(String value){
    if(value==null)return null;
    value=value.replaceAll("&","&amp;");
    value=value.replaceAll("<","&lt;");
    value=value.replaceAll(">","&gt;");
    return value;
  }

  public static boolean findChildToDepth(
      XmlPullParser parser, int parentDepth, String namespaceName, String name)
          throws XmlPullParserException, IOException {
    if(GetDepth(parser)<parentDepth)return false;
    while(Read(parser)){
      int currentDepth=GetDepth(parser);
      if(currentDepth==parentDepth && IsEndElement(parser))
        return false;
      if(currentDepth>parentDepth && IsStartElement(parser,namespaceName,name))
        return true;
    }
    return false;
  }


  public static boolean moveToElement(XmlPullParser parser, String namespaceName, String name)
      throws XmlPullParserException, IOException {
    while(Read(parser)){
      if(IsStartElement(parser,namespaceName,name))
        return true;
    }
    return false;
  }
}
Java Source Code List
