xmlpullparser.java.svn-base

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     * @see #getNamespace()
     * @see #getNamespace(String)
     */
    int getNamespaceCount(int depth) throws XmlPullParserException;

    /**
     * Returns the namespace prefixe for the given position
     * in the namespace stack.
     * Default namespace declaration (xmlns='...') will have null as prefix.
     * If the given index is out of range, an exception is thrown.
     * <p><b>Please note:</b> when the parser is on an END_TAG,
     * namespace prefixes that were declared
     * in the corresponding START_TAG are still accessible
     * although they are no longer in scope.
     */
    String getNamespacePrefix(int pos) throws XmlPullParserException;

    /**
     * Returns the namespace URI for the given position in the
     * namespace stack
     * If the position is out of range, an exception is thrown.
     * <p><b>NOTE:</b> when parser is on END_TAG then namespace prefixes that were declared
     *  in corresponding START_TAG are still accessible even though they are not in scope
     */
    String getNamespaceUri(int pos) throws XmlPullParserException;

    /**
     * Returns the URI corresponding to the given prefix,
     * depending on current state of the parser.
     *
     * <p>If the prefix was not declared in the current scope,
     * null is returned. The default namespace is included
     * in the namespace table and is available via
     * getNamespace (null).
     *
     * <p>This method is a convenience method for
     *
     * <pre>
     *  for (int i = getNamespaceCount(getDepth ())-1; i >= 0; i--) {
     *   if (getNamespacePrefix(i).equals( prefix )) {
     *     return getNamespaceUri(i);
     *   }
     *  }
     *  return null;
     * </pre>
     *
     * <p><strong>Please note:</strong> parser implementations
     * may provide more efifcient lookup, e.g. using a Hashtable.
     * The 'xml' prefix is bound to "http://www.w3.org/XML/1998/namespace", as
     * defined in the
     * <a href="http://www.w3.org/TR/REC-xml-names/#ns-using">Namespaces in XML</a>
     * specification. Analogous, the 'xmlns' prefix is resolved to
     * <a href="http://www.w3.org/2000/xmlns/">http://www.w3.org/2000/xmlns/</a>
     *
     * @see #getNamespaceCount
     * @see #getNamespacePrefix
     * @see #getNamespaceUri
     */
    String getNamespace (String prefix);


    // --------------------------------------------------------------------------
    // miscellaneous reporting methods

    /**
     * Returns the current depth of the element.
     * Outside the root element, the depth is 0. The
     * depth is incremented by 1 when a start tag is reached.
     * The depth is decremented AFTER the end tag
     * event was observed.
     *
     * <pre>
     * &lt;!-- outside --&gt;     0
     * &lt;root>                  1
     *   sometext                 1
     *     &lt;foobar&gt;         2
     *     &lt;/foobar&gt;        2
     * &lt;/root&gt;              1
     * &lt;!-- outside --&gt;     0
     * </pre>
     */
    int getDepth();

    /**
     * Returns a short text describing the current parser state, including
     * the position, a
     * description of the current event and the data source if known.
     * This method is especially useful to provide meaningful
     * error messages and for debugging purposes.
     */
    String getPositionDescription ();


    /**
     * Returns the current line number, starting from 1.
     * When the parser does not know the current line number
     * or can not determine it,  -1 is returned (e.g. for WBXML).
     *
     * @return current line number or -1 if unknown.
     */
    int getLineNumber();

    /**
     * Returns the current column number, starting from 0.
     * When the parser does not know the current column number
     * or can not determine it,  -1 is returned (e.g. for WBXML).
     *
     * @return current column number or -1 if unknown.
     */
    int getColumnNumber();


    // --------------------------------------------------------------------------
    // TEXT related methods

    /**
     * Checks whether the current TEXT event contains only whitespace
     * characters.
     * For IGNORABLE_WHITESPACE, this is always true.
     * For TEXT and CDSECT, false is returned when the current event text
     * contains at least one non-white space character. For any other
     * event type an exception is thrown.
     *
     * <p><b>Please note:</b> non-validating parsers are not
     * able to distinguish whitespace and ignorable whitespace,
     * except from whitespace outside the root element. Ignorable
     * whitespace is reported as separate event, which is exposed
     * via nextToken only.
     *
     */
    boolean isWhitespace() throws XmlPullParserException;

    /**
     * Returns the text content of the current event as String.
     * The value returned depends on current event type,
     * for example for TEXT event it is element content
     * (this is typical case when next() is used).
     *
     * See description of nextToken() for detailed description of
     * possible returned values for different types of events.
     *
     * <p><strong>NOTE:</strong> in case of ENTITY_REF, this method returns
     * the entity replacement text (or null if not available). This is
     * the only case where
     * getText() and getTextCharacters() return different values.
     *
     * @see #getEventType
     * @see #next
     * @see #nextToken
     */
    String getText ();


    /**
     * Returns the buffer that contains the text of the current event,
     * as well as the start offset and length relevant for the current
     * event. See getText(), next() and nextToken() for description of possible returned values.
     *
     * <p><strong>Please note:</strong> this buffer must not
     * be modified and its content MAY change after a call to
     * next() or nextToken(). This method will always return the
     * same value as getText(), except for ENTITY_REF. In the case
     * of ENTITY ref, getText() returns the replacement text and
     * this method returns the actual input buffer containing the
     * entity name.
     * If getText() returns null, this method returns null as well and
     * the values returned in the holder array MUST be -1 (both start
     * and length).
     *
     * @see #getText
     * @see #next
     * @see #nextToken
     *
     * @param holderForStartAndLength Must hold an 2-element int array
     * into which the start offset and length values will be written.
     * @return char buffer that contains the text of the current event
     *  (null if the current event has no text associated).
     */
    char[] getTextCharacters(int [] holderForStartAndLength);

    // --------------------------------------------------------------------------
    // START_TAG / END_TAG shared methods

    /**
     * Returns the namespace URI of the current element.
     * The default namespace is represented
     * as empty string.
     * If namespaces are not enabled, an empty String ("") is always returned.
     * The current event must be START_TAG or END_TAG; otherwise,
     * null is returned.
     */
    String getNamespace ();

    /**
     * For START_TAG or END_TAG events, the (local) name of the current
     * element is returned when namespaces are enabled. When namespace
     * processing is disabled, the raw name is returned.
     * For ENTITY_REF events, the entity name is returned.
     * If the current event is not START_TAG, END_TAG, or ENTITY_REF,
     * null is returned.
     * <p><b>Please note:</b> To reconstruct the raw element name
     *  when namespaces are enabled and the prefix is not null,
     * you will need to  add the prefix and a colon to localName..
     *
     */
    String getName();

    /**
     * Returns the prefix of the current element.
     * If the element is in the default namespace (has no prefix),
     * null is returned.
     * If namespaces are not enabled, or the current event
     * is not  START_TAG or END_TAG, null is returned.
     */
    String getPrefix();

    /**
     * Returns true if the current event is START_TAG and the tag
     * is degenerated
     * (e.g. &lt;foobar/&gt;).
     * <p><b>NOTE:</b> if the parser is not on START_TAG, an exception
     * will be thrown.
     */
    boolean isEmptyElementTag() throws XmlPullParserException;

    // --------------------------------------------------------------------------
    // START_TAG Attributes retrieval methods

    /**
     * Returns the number of attributes of the current start tag, or
     * -1 if the current event type is not START_TAG
     *
     * @see #getAttributeNamespace
     * @see #getAttributeName
     * @see #getAttributePrefix
     * @see #getAttributeValue
     */
    int getAttributeCount();

    /**
     * Returns the namespace URI of the attribute
     * with the given index (starts from 0).
     * Returns an empty string ("") if namespaces are not enabled
     * or the attribute has no namespace.
     * Throws an IndexOutOfBoundsException if the index is out of range
     * or the current event type is not START_TAG.
     *
     * <p><strong>NOTE:</strong> if FEATURE_REPORT_NAMESPACE_ATTRIBUTES is set
     * then namespace attributes (xmlns:ns='...') must be reported
     * with namespace
     * <a href="http://www.w3.org/2000/xmlns/">http://www.w3.org/2000/xmlns/</a>
     * (visit this URL for description!).
     * The default namespace attribute (xmlns="...") will be reported with empty namespace.
     * <p><strong>NOTE:</strong>The xml prefix is bound as defined in
     * <a href="http://www.w3.org/TR/REC-xml-names/#ns-using">Namespaces in XML</a>
     * specification to "http://www.w3.org/XML/1998/namespace".
     *
     * @param zero based index of attribute
     * @return attribute namespace,
     *   empty string ("") is returned  if namesapces processing is not enabled or
     *   namespaces processing is enabled but attribute has no namespace (it has no prefix).
     */
    String getAttributeNamespace (int index);

    /**
     * Returns the local name of the specified attribute
     * if namespaces are enabled or just attribute name if namespaces are disabled.
     * Throws an IndexOutOfBoundsException if the index is out of range
     * or current event type is not START_TAG.
     *
     * @param zero based index of attribute
     * @return attribute name (null is never returned)
     */
    String getAttributeName (int index);

    /**
     * Returns the prefix of the specified attribute
     * Returns null if the element has no prefix.
     * If namespaces are disabled it will always return null.
     * Throws an IndexOutOfBoundsException if the index is out of range