XMLPULL is the newest and perhaps the simplest API discussed in this book. It includes only one package, which contains one factory class, one interface representing the parser, and one exception. A pull parser works in streaming mode like a SAX parser. However, it waits for the client program to request the next event rather than pushing it to it. This section is based on version 1.0.8 of XMLPULL.


The org.xmlpull.v1 package includes all three parts of the XMLPULL API: XmlPullParser , XmlPullParserFactory , and XmlPullParserException .


The XmlPullParser interface represents the parser. It contains constant fields that represent type codes and features. It declares methods to get and set features and properties, to retrieve the next token from the parser, and to extract the data from that token.

 package org.xmlpull.v1;  public interface  XmlPullParser  {   public static final String  NO_NAMESPACE;  public static final int  START_DOCUMENT;  public static final int  END_DOCUMENT;  public static final int  START_TAG;  public static final int  END_TAG;  public static final int  TEXT;  public static final byte  CDSECT;  public static final byte  ENTITY_REF;  public static final byte  IGNORABLE_WHITESPACE;  public static final byte  PROCESSING_INSTRUCTION;  public static final int  COMMENT;  public static final int  DOCDECL;  public static final String[]  TYPES;  public static final String  FEATURE_PROCESS_NAMESPACES;  public static final String  FEATURE_REPORT_NAMESPACE_ATTRIBUTES;  public static final String  FEATURE_PROCESS_DOCDECL;  public static final String  FEATURE_VALIDATION;  public void  setFeature  (String  name,  boolean  state  )    throws XmlPullParserException;   public boolean  getFeature  (String  name  );   public void  setProperty  (String  name,  Object  value  )    throws XmlPullParserException;   public Object  getProperty  (String  name  );   public void  setInput  (Reader  in  )    throws XmlPullParserException;   public void  setInput  (InputStream  in,  String  encoding  )    throws XmlPullParserException;   public String  getInputEncoding  ();   public void  defineEntityReplacementText  (String  entityName,  String  replacementText  ) throws XmlPullParserException;   public int  getNamespaceCount  (int  depth  )    throws XmlPullParserException;   public String  getNamespacePrefix  (int  position  )    throws XmlPullParserException;   public String  getNamespaceUri  (int  position  )    throws XmlPullParserException;   public String  getNamespace  (String  prefix  );   public int  getDepth  ();   public String  getPositionDescription  ();   public int  getLineNumber  ();   public int  getColumnNumber  ();   public boolean  isWhitespace  () throws XmlPullParserException;   public String  getText  ();   public char[]  getTextCharacters  (int  holderForStartAndLength  );   public String  getNamespace  ();   public String  getName  ();   public String  getPrefix  ();   public boolean  isEmptyElementTag  ()    throws XmlPullParserException;   public int  getAttributeCount  ();   public String  getAttributeNamespace  (int  index  );   public String  getAttributeName  (int  index  );   public String  getAttributePrefix  (int  index  );   public String  getAttributeType  (int  index  );   public boolean  isAttributeDefault  (int  index  );   public String  getAttributeValue  (int  index  );   public String  getAttributeValue  (String  namespace,  String  name  );   public int  getEventType  ()    throws XmlPullParserException;   public int  next  ()    throws XmlPullParserException, IOException;   public int  nextToken  ()    throws XmlPullParserException, IOException;   public void  require  (int  type,  String  namespace,  String  name  )    throws XmlPullParserException, IOException;   public String  nextText  ()    throws XmlPullParserException, IOException;   public int  nextTag  ()    throws XmlPullParserException, IOException;  } 

The XmlPullParserFactory class creates and configures new XmlPullParser objects in an implementation-independent fashion.

 package org.xmlpull.v1;  public class  XmlPullParserFactory  {   public static final String  PROPERTY_NAME;  protected Vector  parserClasses;  protected String  parserClassesLocation;  protected Hashtable  features;  protected  XmlPullParserFactory  ();   public void  setFeature  (String  name,  boolean  state  )    throws XmlPullParserException;   public boolean  getFeature  (String  name  );   public void  setNamespaceAware  (boolean  awareness  );   public boolean  isNamespaceAware  ();   public void  setValidating  (boolean  validating  );   public boolean  isValidating  ();   public XmlPullParser  newPullParser  ()    throws XmlPullParserException;   public static XmlPullParserFactory  newInstance  ()    throws XmlPullParserException;   public static XmlPullParserFactory  newInstance  (    String  classNames,  Class  context  )    throws XmlPullParserException;  } 
Exceptions and Errors

XMLPULL includes a single exception class, XmlPullParserException , which represents the various things that can go wrong while parsing an XML document. In addition, a few methods that perform I/O can throw an IOException .


An XmlPullParserException indicates that something has gone wrong during a parse. This may be a well- formedness error in the document, such as an unclosed element or a programming error in the code.

 package org.xmlpull.v1;  public class  XmlPullParserException  extends Exception {   protected Throwable  detail;  protected int  row;  protected int  column;  public  XmlPullParserException(  String  message  );   public  XmlPullParserException(  String  message,  XmlPullParser  parser,  Throwable  detail  );   public Throwable  getDetail  ();   public int  getLineNumber  ();   public int  getColumnNumber  ();   public void  printStackTrace  ();  } 

Processing XML with Java. A Guide to SAX, DOM, JDOM, JAXP, and TrAX
Processing XML with Javaв„ў: A Guide to SAX, DOM, JDOM, JAXP, and TrAX
ISBN: 0201771861
EAN: 2147483647
Year: 2001
Pages: 191

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