public class WbxmlParser extends Object implements XmlPullParser
| Modifier and Type | Field and Description |
|---|---|
static int |
WAP_EXTENSION
Parser event type for Wbxml-specific events.
|
CDSECT, COMMENT, DOCDECL, END_DOCUMENT, END_TAG, ENTITY_REF, FEATURE_PROCESS_DOCDECL, FEATURE_PROCESS_NAMESPACES, FEATURE_REPORT_NAMESPACE_ATTRIBUTES, FEATURE_VALIDATION, IGNORABLE_WHITESPACE, NO_NAMESPACE, PROCESSING_INSTRUCTION, START_DOCUMENT, START_TAG, TEXT, TYPES| Constructor and Description |
|---|
WbxmlParser() |
| Modifier and Type | Method and Description |
|---|---|
void |
defineEntityReplacementText(String entity,
String value)
Set new value for entity replacement text as defined in
XML 1.0 Section 4.5 Construction of Internal Entity
Replacement Text.
|
int |
getAttributeCount()
Returns the number of attributes of the current start tag, or -1 if the current event type is not START_TAG
|
String |
getAttributeName(int index)
Returns the local name of the specified attribute if namespaces are enabled or just attribute name if namespaces
are disabled.
|
String |
getAttributeNamespace(int index)
Returns the namespace URI of the attribute with the given index (starts from 0).
|
String |
getAttributePrefix(int index)
Returns the prefix of the specified attribute Returns null if the element has no prefix.
|
String |
getAttributeType(int index)
Returns the type of the specified attribute If parser is non-validating it MUST return CDATA.
|
String |
getAttributeValue(int index)
Returns the given attributes value.
|
String |
getAttributeValue(String namespace,
String name)
Returns the attributes value identified by namespace URI and namespace localName.
|
int |
getColumnNumber()
Returns the current column number, starting from 0.
|
int |
getDepth()
Returns the current depth of the element.
|
int |
getEventType()
Returns the type of the current event (START_TAG, END_TAG, TEXT, etc.)
|
boolean |
getFeature(String feature)
Returns the current value of the given feature.
|
String |
getInputEncoding()
Returns the input encoding if known, null otherwise.
|
int |
getLineNumber()
Returns the current line number, starting from 1.
|
String |
getName()
For START_TAG or END_TAG events, the (local) name of the current element is returned when namespaces are enabled.
|
String |
getNamespace()
Returns the namespace URI of the current element.
|
String |
getNamespace(String prefix)
Returns the URI corresponding to the given prefix, depending on current state of the parser.
|
int |
getNamespaceCount(int depth)
Returns the numbers of elements in the namespace stack for the given depth.
|
String |
getNamespacePrefix(int pos)
Returns the namespace prefixe for the given position in the namespace stack.
|
String |
getNamespaceUri(int pos)
Returns the namespace URI for the given position in the namespace stack If the position is out of range, an
exception is thrown.
|
String |
getPositionDescription()
Returns a short text describing the current parser state, including the position, a description of the current
event and the data source if known.
|
String |
getPrefix()
Returns the prefix of the current element.
|
Object |
getProperty(String property)
Look up the value of a property.
|
String |
getText()
Returns the text content of the current event as String.
|
char[] |
getTextCharacters(int[] poslen)
Returns the buffer that contains the text of the current event, as well as the start offset and length relevant
for the current event.
|
int |
getWapCode()
Returns the token ID for start tags or the event type for wap proprietary events
such as OPAQUE.
|
Object |
getWapExtensionData() |
boolean |
isAttributeDefault(int index)
Returns if the specified attribute was not in input was declared in XML.
|
boolean |
isEmptyElementTag()
Returns true if the current event is START_TAG and the tag is degenerated (e.g.
|
boolean |
isWhitespace()
Checks whether the current TEXT event contains only whitespace characters.
|
int |
next()
Get next parsing event - element content wil be coalesced and only one TEXT event must be returned for whole
element content (comments and processing instructions will be ignored and emtity references must be expanded or
exception mus be thrown if entity reerence can not be exapnded).
|
int |
nextTag()
Call next() and return event if it is START_TAG or END_TAG otherwise throw an exception.
|
String |
nextText()
If current event is START_TAG then if next element is TEXT then element content is returned or if next event is
END_TAG then empty string is returned, otherwise exception is thrown.
|
int |
nextToken()
This method works similarly to next() but will expose additional event types (COMMENT, CDSECT, DOCDECL,
ENTITY_REF, PROCESSING_INSTRUCTION, or IGNORABLE_WHITESPACE) if they are available in input.
|
Object |
parseWapExtension(int id)
Overwrite this method to intercept all wap events
|
void |
readAttr() |
void |
require(int type,
String namespace,
String name)
Test if the current event is of the given type and if the namespace and name do match.
|
protected String |
resolveWapExtension(int id,
Object data)
overwrite for own WAP extension handling in attributes and high level parsing
(above nextToken() level)
|
void |
setAttrStartTable(int page,
String[] table)
Sets the attribute start Table for a given page.
|
void |
setAttrValueTable(int page,
String[] table)
Sets the attribute value Table for a given page.
|
void |
setFeature(String feature,
boolean value)
Use this call to change the general behaviour of the parser, such as namespace processing or doctype declaration
handling.
|
void |
setInput(InputStream in,
String enc)
Sets the input stream the parser is going to process.
|
void |
setInput(Reader reader)
Set the input source for parser to the given reader and resets the parser.
|
void |
setProperty(String property,
Object value)
Set the value of a property.
|
void |
setTagTable(int page,
String[] table)
Sets the tag table for a given page.
|
public static final int WAP_EXTENSION
public void defineEntityReplacementText(String entity, String value) throws XmlPullParserException
XmlPullParserThe motivation for this function is to allow very small implementations of XMLPULL that will work in J2ME environments. Though these implementations may not be able to process the document type declaration, they still can work with known DTDs by using this function.
Please notes: The given value is used literally as replacement text and it corresponds to declaring entity in DTD that has all special characters escaped: left angle bracket is replaced with <, ampersnad with & and so on.
Note: The given value is the literal replacement text and must not contain any other entity reference (if it contains any entity reference there will be no further replacement).
Note: The list of pre-defined entity names will always contain standard XML entities such as amp (&), lt (<), gt (>), quot ("), and apos ('). Those cannot be redefined by this method!
defineEntityReplacementText in interface XmlPullParserXmlPullParserExceptionXmlPullParser.setInput(java.io.Reader),
XmlPullParser.FEATURE_PROCESS_DOCDECL,
XmlPullParser.FEATURE_VALIDATIONpublic int getAttributeCount()
XmlPullParsergetAttributeCount in interface XmlPullParserXmlPullParser.getAttributeNamespace(int),
XmlPullParser.getAttributeName(int),
XmlPullParser.getAttributePrefix(int),
XmlPullParser.getAttributeValue(int)public String getAttributeName(int index)
XmlPullParsergetAttributeName in interface XmlPullParserindex - based index of attributepublic String getAttributeNamespace(int index)
XmlPullParserNOTE: if FEATURE_REPORT_NAMESPACE_ATTRIBUTES is set then namespace attributes (xmlns:ns='...') must be reported with namespace http://www.w3.org/2000/xmlns/ (visit this URL for description!). The default namespace attribute (xmlns="...") will be reported with empty namespace.
NOTE:The xml prefix is bound as defined in Namespaces in XML specification to "http://www.w3.org/XML/1998/namespace".
getAttributeNamespace in interface XmlPullParserindex - based index of attributepublic String getAttributePrefix(int index)
XmlPullParsergetAttributePrefix in interface XmlPullParserindex - based index of attributepublic String getAttributeType(int index)
XmlPullParsergetAttributeType in interface XmlPullParserindex - based index of attributepublic String getAttributeValue(int index)
XmlPullParserNOTE: attribute value must be normalized (including entity replacement text if PROCESS_DOCDECL is false) as described in XML 1.0 section 3.3.3 Attribute-Value Normalization
getAttributeValue in interface XmlPullParserindex - based index of attributeXmlPullParser.defineEntityReplacementText(java.lang.String, java.lang.String)public String getAttributeValue(String namespace, String name)
XmlPullParserNOTE: attribute value must be normalized (including entity replacement text if PROCESS_DOCDECL is false) as described in XML 1.0 section 3.3.3 Attribute-Value Normalization
getAttributeValue in interface XmlPullParsernamespace - Namespace of the attribute if namespaces are enabled otherwise must be nullname - If namespaces enabled local name of attribute otherwise just attribute nameXmlPullParser.defineEntityReplacementText(java.lang.String, java.lang.String)public int getColumnNumber()
XmlPullParsergetColumnNumber in interface XmlPullParserpublic int getDepth()
XmlPullParser
<!-- outside --> 0
<root> 1
sometext 1
<foobar> 2
</foobar> 2
</root> 1
<!-- outside --> 0
getDepth in interface XmlPullParserpublic int getEventType()
throws XmlPullParserException
XmlPullParsergetEventType in interface XmlPullParserXmlPullParserExceptionXmlPullParser.next(),
XmlPullParser.nextToken()public boolean getFeature(String feature)
XmlPullParserPlease note: unknown features are always returned as false.
getFeature in interface XmlPullParserfeature - The name of feature to be retrieved.public String getInputEncoding()
XmlPullParsergetInputEncoding in interface XmlPullParserpublic int getLineNumber()
XmlPullParsergetLineNumber in interface XmlPullParserpublic String getName()
XmlPullParserPlease note: 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..
getName in interface XmlPullParserpublic String getNamespace()
XmlPullParsergetNamespace in interface XmlPullParserpublic String getNamespace(String prefix)
XmlPullParserIf 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).
This method is a convenience method for
for (int i = getNamespaceCount(getDepth()) - 1; i >= 0; i--) {
if (getNamespacePrefix(i).equals(prefix)) {
return getNamespaceUri(i);
}
}
return null;
Please note: 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 Namespaces in XML specification. Analogous, the 'xmlns' prefix is resolved to http://www.w3.org/2000/xmlns/
getNamespace in interface XmlPullParserXmlPullParser.getNamespaceCount(int),
XmlPullParser.getNamespacePrefix(int),
XmlPullParser.getNamespaceUri(int)public int getNamespaceCount(int depth)
XmlPullParserNOTE: when parser is on END_TAG then it is allowed to call this function with getDepth()+1 argument to retrieve position of namespace prefixes and URIs that were declared on corresponding START_TAG.
NOTE: to retrieve lsit of namespaces declared in current element:
XmlPullParser pp = ...
int nsStart = pp.getNamespaceCount(pp.getDepth()-1);
int nsEnd = pp.getNamespaceCount(pp.getDepth());
for (int i = nsStart; i < nsEnd; i++) {
String prefix = pp.getNamespacePrefix(i);
String ns = pp.getNamespaceUri(i);
// ...
}
getNamespaceCount in interface XmlPullParserXmlPullParser.getNamespacePrefix(int),
XmlPullParser.getNamespaceUri(int),
XmlPullParser.getNamespace(),
XmlPullParser.getNamespace(String)public String getNamespacePrefix(int pos)
XmlPullParserPlease note: 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.
getNamespacePrefix in interface XmlPullParserpublic String getNamespaceUri(int pos)
XmlPullParserNOTE: 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
getNamespaceUri in interface XmlPullParserpublic String getPositionDescription()
XmlPullParsergetPositionDescription in interface XmlPullParserpublic String getPrefix()
XmlPullParsergetPrefix in interface XmlPullParserpublic Object getProperty(String property)
XmlPullParserNOTE: unknown properties are always returned as null.
getProperty in interface XmlPullParserproperty - The name of property to be retrieved.public String getText()
XmlPullParserNOTE: 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.
getText in interface XmlPullParserXmlPullParser.getEventType(),
XmlPullParser.next(),
XmlPullParser.nextToken()public char[] getTextCharacters(int[] poslen)
XmlPullParserPlease note: 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).
getTextCharacters in interface XmlPullParserposlen - Must hold an 2-element int array into which the start offset and length values will be written.XmlPullParser.getText(),
XmlPullParser.next(),
XmlPullParser.nextToken()public int getWapCode()
public Object getWapExtensionData()
public boolean isAttributeDefault(int index)
XmlPullParserisAttributeDefault in interface XmlPullParserindex - based index of attributepublic boolean isEmptyElementTag()
throws XmlPullParserException
XmlPullParserNOTE: if the parser is not on START_TAG, an exception will be thrown.
isEmptyElementTag in interface XmlPullParserXmlPullParserExceptionpublic boolean isWhitespace()
throws XmlPullParserException
XmlPullParserPlease note: 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.
isWhitespace in interface XmlPullParserXmlPullParserExceptionpublic int next()
throws XmlPullParserException,
IOException
XmlPullParserNOTE: empty element (such as <tag/>) will be reported with two separate events: START_TAG, END_TAG - it must be so to preserve parsing equivalency of empty element to <tag></tag>. (see isEmptyElementTag ())
next in interface XmlPullParserXmlPullParserExceptionIOExceptionXmlPullParser.isEmptyElementTag(),
XmlPullParser.START_TAG,
XmlPullParser.TEXT,
XmlPullParser.END_TAG,
XmlPullParser.END_DOCUMENTpublic int nextTag()
throws XmlPullParserException,
IOException
XmlPullParseressentially it does this
int eventType = next();
if (eventType == TEXT && isWhitespace()) { // skip whitespace
eventType = next();
}
if (eventType != START_TAG && eventType != END_TAG) {
throw new XmlPullParserException("expected start or end tag", this, null);
}
return eventType;
nextTag in interface XmlPullParserXmlPullParserExceptionIOExceptionpublic String nextText() throws XmlPullParserException, IOException
XmlPullParserThe motivation for this function is to allow to parse consistently both empty elements and elements that has non empty content, for example for input:
p.nextTag() p.requireEvent(p.START_TAG, "", "tag"); String content = p.nextText(); p.requireEvent(p.END_TAG, "", "tag");This function together with nextTag make it very easy to parse XML that has no mixed content.
Essentially it does this
if (getEventType() != START_TAG) {
throw new XmlPullParserException("parser must be on START_TAG to read next text", this, null);
}
int eventType = next();
if (eventType == TEXT) {
String result = getText();
eventType = next();
if (eventType != END_TAG) {
throw new XmlPullParserException("event TEXT it must be immediately followed by END_TAG", this, null);
}
return result;
} else if (eventType == END_TAG) {
return "";
} else {
throw new XmlPullParserException("parser must be on START_TAG or TEXT to read text", this, null);
}
nextText in interface XmlPullParserXmlPullParserExceptionIOExceptionpublic int nextToken()
throws XmlPullParserException,
IOException
XmlPullParserIf special feature FEATURE_XML_ROUNDTRIP (identified by URI: http://xmlpull.org/v1/doc/features.html#xml-roundtrip) is enabled it is possible to do XML document round trip ie. reproduce exectly on output the XML input using getText(): returned content is always unnormalized (exactly as in input). Otherwise returned content is end-of-line normalized as described XML 1.0 End-of-Line Handling and. Also when this feature is enabled exact content of START_TAG, END_TAG, DOCDECL and PROCESSING_INSTRUCTION is available.
Here is the list of tokens that can be returned from nextToken() and what getText() and getTextCharacters() returns:
" titlepage SYSTEM "http://www.foo.bar/dtds/typo.dtd" [<!ENTITY % active.links "INCLUDE">]"
for input document that contained:
<!DOCTYPE titlepage SYSTEM "http://www.foo.bar/dtds/typo.dtd" [<!ENTITY % active.links "INCLUDE">]>otherwise if FEATURE_XML_ROUNDTRIP is false and PROCESS_DOCDECL is true then what is returned is undefined (it may be even null)
NOTE: there is no gurantee that there will only one TEXT or IGNORABLE_WHITESPACE event from nextToken() as parser may chose to deliver element content in multiple tokens (dividing element content into chunks)
NOTE: whether returned text of token is end-of-line normalized is depending on FEATURE_XML_ROUNDTRIP.
NOTE: XMLDecl (<?xml ...?>) is not reported but its content is available through optional properties (see class description above).
nextToken in interface XmlPullParserXmlPullParserExceptionIOExceptionXmlPullParser.next(),
XmlPullParser.START_TAG,
XmlPullParser.TEXT,
XmlPullParser.END_TAG,
XmlPullParser.END_DOCUMENT,
XmlPullParser.COMMENT,
XmlPullParser.DOCDECL,
XmlPullParser.PROCESSING_INSTRUCTION,
XmlPullParser.ENTITY_REF,
XmlPullParser.IGNORABLE_WHITESPACEpublic Object parseWapExtension(int id) throws IOException, XmlPullParserException
IOExceptionXmlPullParserExceptionpublic void readAttr()
throws IOException,
XmlPullParserException
IOExceptionXmlPullParserExceptionpublic void require(int type,
String namespace,
String name)
throws XmlPullParserException,
IOException
XmlPullParserEssentially it does this
if (type != getEventType() || (namespace != null && !namespace.equals(getNamespace()))
|| (name != null && !name.equals(getName())))
throw new XmlPullParserException("expected " + TYPES[type] + getPositionDescription());
require in interface XmlPullParserXmlPullParserExceptionIOExceptionprotected String resolveWapExtension(int id, Object data)
public void setAttrStartTable(int page,
String[] table)
public void setAttrValueTable(int page,
String[] table)
public void setFeature(String feature, boolean value) throws XmlPullParserException
XmlPullParserExample: call setFeature(FEATURE_PROCESS_NAMESPACES, true) in order to switch on namespace processing. The initial settings correspond to the properties requested from the XML Pull Parser factory. If none were requested, all feautures are deactivated by default.
setFeature in interface XmlPullParserXmlPullParserException - If the feature is not supported or can not be setpublic void setInput(InputStream in, String enc) throws XmlPullParserException
XmlPullParserNOTE: If an input encoding string is passed, it MUST be used. Otherwise, if inputEncoding is null, the parser SHOULD try to determine input encoding following XML 1.0 specification (see below). If encoding detection is supported then following feature http://xmlpull.org/v1/doc/features.html#detect- encoding MUST be true amd otherwise it must be false
setInput in interface XmlPullParserin - contains a raw byte input stream of possibly unknown encoding (when inputEncoding is null).enc - if not null it MUST be used as encoding for inputStreamXmlPullParserExceptionpublic void setInput(Reader reader) throws XmlPullParserException
XmlPullParsersetInput in interface XmlPullParserXmlPullParserExceptionpublic void setProperty(String property, Object value) throws XmlPullParserException
XmlPullParsersetProperty in interface XmlPullParserXmlPullParserException - If the property is not supported or can not be setpublic void setTagTable(int page,
String[] table)