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public interface LSParserLSParser provides an API for parsing XML and building the
corresponding DOM document structure. A LSParser instance
can be obtained by invoking the
DOMImplementationLS.createLSParser() method.
As specified in [DOM Level 3 Core]
, when a document is first made available via the LSParser:
value and
nodeValue attributes of an Attr node initially
return the XML 1.0
normalized value. However, if the parameters "
validate-if-schema" and "
datatype-normalization" are set to true, depending on the attribute normalization
used, the attribute values may differ from the ones obtained by the XML
1.0 attribute normalization. If the parameters "
datatype-normalization" is set to false, the XML 1.0 attribute normalization is
guaranteed to occur, and if the attributes list does not contain
namespace declarations, the attributes attribute on
Element node represents the property [attributes] defined in [XML Information Set]
.
LSParser objects are expected to also
implement the events::EventTarget interface so that event
listeners can be registered on asynchronous LSParser
objects.
Events supported by asynchronous LSParser objects are:
LSParserLSLoadEventLSParserLSProgressEvent"http://www.w3.org/2002/DOMLS".
While parsing an input source, errors are reported to the application
through the error handler (LSParser.domConfig's "
error-handler" parameter). This specification does in no way try to define all possible
errors that can occur while parsing XML, or any other markup, but some
common error cases are defined. The types (DOMError.type) of
errors and warnings defined by this specification are:
"check-character-normalization-failure" [error]"doctype-not-allowed" [fatal]true"no-input-specified" [fatal]LSInput"pi-base-uri-not-preserved" [warning]false<!DOCTYPE root [ <!ENTITY e SYSTEM 'subdir/myentity.ent' ]> <root> &e; </root>
subdir/myentity.ent<one> <two/> </one> <?pi 3.14159?> <more/>
"unbound-prefix-in-entity" [warning]true"unknown-character-denormalization" [fatal]false"unsupported-encoding" [fatal]"unsupported-media-type" [fatal]trueField Summary | |
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Method Summary | |
void |
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boolean |
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boolean |
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DOMConfiguration |
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LSParserFilter |
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Document | |
Document |
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Node |
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public static final short ACTION_APPEND_AS_CHILDREN
Append the result of the parse operation as children of the context node. For this action to work, the context node must be anElementor aDocumentFragment.
- Field Value:
- 1
public static final short ACTION_INSERT_AFTER
Insert the result of the parse operation as the immediately following sibling of the context node. For this action to work the context node's parent must be anElementor aDocumentFragment.
- Field Value:
- 4
public static final short ACTION_INSERT_BEFORE
Insert the result of the parse operation as the immediately preceding sibling of the context node. For this action to work the context node's parent must be anElementor aDocumentFragment.
- Field Value:
- 3
public static final short ACTION_REPLACE
Replace the context node with the result of the parse operation. For this action to work, the context node must have a parent, and the parent must be anElementor aDocumentFragment.
- Field Value:
- 5
public static final short ACTION_REPLACE_CHILDREN
Replace all the children of the context node with the result of the parse operation. For this action to work, the context node must be anElement, aDocument, or aDocumentFragment.
- Field Value:
- 2
public void abort()
Abort the loading of the document that is currently being loaded by theLSParser. If theLSParseris currently not busy, a call to this method does nothing.
public boolean getAsync()
trueif theLSParseris asynchronous,falseif it is synchronous.
public boolean getBusy()
trueif theLSParseris currently busy loading a document, otherwisefalse.
public DOMConfiguration getDomConfig()
TheDOMConfigurationobject used when parsing an input source. ThisDOMConfigurationis specific to the parse operation. No parameter values from thisDOMConfigurationobject are passed automatically to theDOMConfigurationobject on theDocumentthat is created, or used, by the parse operation. The DOM application is responsible for passing any needed parameter values from thisDOMConfigurationobject to theDOMConfigurationobject referenced by theDocumentobject.
In addition to the parameters recognized in on the DOMConfiguration interface defined in [DOM Level 3 Core] , theDOMConfigurationobjects forLSParseradd or modify the following parameters:
"charset-overrides-xml-encoding"
true- optionaldefaultIETF RFC 2616XML 1.0
LSInputfalse- required
"disallow-doctype"
true- optional"doctype-not-allowed"
false- requireddefault
"ignore-unknown-character-denormalizations""infoset"DOMConfigurationDOM Level 3 CoretrueLSParser"namespaces"
true- requireddefaultXML NamespacesXML Namespaces 1.1
false- optional
"resource-resolver"required LSResourceResolverLSResourceResolver"supported-media-types-only"
true- optional"unsupported-media-type"IETF RFC 3023
false- requireddefault
"validate"DOMConfigurationDOM Level 3 Corefalse"validate-if-schema"DOMConfigurationDOM Level 3 Corefalse"well-formed"DOMConfigurationDOM Level 3 Corefalse
public LSParserFilter getFilter()
When a filter is provided, the implementation will call out to the filter as it is constructing the DOM tree structure. The filter can choose to remove elements from the document being constructed, or to terminate the parsing early.
The filter is invoked after the operations requested by theDOMConfigurationparameters have been applied. For example, if " validate" is set totrue, the validation is done before invoking the filter.
public Document parse(LSInput input) throws DOMException, LSException
Parse an XML document from a resource identified by aLSInput.
- Parameters:
input- TheLSInputfrom which the source of the document is to be read.
- Returns:
- If the
LSParseris a synchronousLSParser, the newly created and populatedDocumentis returned. If theLSParseris asynchronous,nullis returned since the document object may not yet be constructed when this method returns.
- Throws:
DOMException- INVALID_STATE_ERR: Raised if theLSParser'sLSParser.busyattribute istrue.LSException- PARSE_ERR: Raised if theLSParserwas unable to load the XML document. DOM applications should attach aDOMErrorHandlerusing the parameter " error-handler" if they wish to get details on the error.
public Document parseURI(String uri) throws DOMException, LSException
Parse an XML document from a location identified by a URI reference [IETF RFC 2396]. If the URI contains a fragment identifier (see section 4.1 in [IETF RFC 2396]), the behavior is not defined by this specification, future versions of this specification may define the behavior.
- Parameters:
uri- The location of the XML document to be read.
- Returns:
- If the
LSParseris a synchronousLSParser, the newly created and populatedDocumentis returned, ornullif an error occured. If theLSParseris asynchronous,nullis returned since the document object may not yet be constructed when this method returns.
- Throws:
DOMException- INVALID_STATE_ERR: Raised if theLSParser.busyattribute istrue.LSException- PARSE_ERR: Raised if theLSParserwas unable to load the XML document. DOM applications should attach aDOMErrorHandlerusing the parameter " error-handler" if they wish to get details on the error.
public Node parseWithContext(LSInput input, Node contextArg, short action) throws DOMException, LSException
Parse an XML fragment from a resource identified by aLSInputand insert the content into an existing document at the position specified with thecontextandactionarguments. When parsing the input stream, the context node (or its parent, depending on where the result will be inserted) is used for resolving unbound namespace prefixes. The context node'sownerDocumentnode (or the node itself if the node of typeDOCUMENT_NODE) is used to resolve default attributes and entity references.
As the new data is inserted into the document, at least one mutation event is fired per new immediate child or sibling of the context node.
If the context node is aDocumentnode and the action isACTION_REPLACE_CHILDREN, then the document that is passed as the context node will be changed such that itsxmlEncoding,documentURI,xmlVersion,inputEncoding,xmlStandalone, and all other such attributes are set to what they would be set to if the input source was parsed usingLSParser.parse().
This method is always synchronous, even if theLSParseris asynchronous (LSParser.asyncistrue).
If an error occurs while parsing, the caller is notified through theErrorHandlerinstance associated with the " error-handler" parameter of theDOMConfiguration.
When callingparseWithContext, the values of the following configuration parameters will be ignored and their default values will always be used instead: " validate", " validate-if-schema", and " element-content-whitespace". Other parameters will be treated normally, and the parser is expected to call theLSParserFilterjust as if a whole document was parsed.
- Parameters:
input- TheLSInputfrom which the source document is to be read. The source document must be an XML fragment, i.e. anything except a complete XML document (except in the case where the context node of typeDOCUMENT_NODE, and the action isACTION_REPLACE_CHILDREN), a DOCTYPE (internal subset), entity declaration(s), notation declaration(s), or XML or text declaration(s).contextArg- The node that is used as the context for the data that is being parsed. This node must be aDocumentnode, aDocumentFragmentnode, or a node of a type that is allowed as a child of anElementnode, e.g. it cannot be anAttributenode.action- This parameter describes which action should be taken between the new set of nodes being inserted and the existing children of the context node. The set of possible actions is defined inACTION_TYPESabove.
- Returns:
- Return the node that is the result of the parse operation. If the result is more than one top-level node, the first one is returned.
- Throws:
DOMException- HIERARCHY_REQUEST_ERR: Raised if the content cannot replace, be inserted before, after, or as a child of the context node (see alsoNode.insertBeforeorNode.replaceChildin [DOM Level 3 Core] ).
NOT_SUPPORTED_ERR: Raised if theLSParserdoesn't support this method, or if the context node is of typeDocumentand the DOM implementation doesn't support the replacement of theDocumentTypechild orElementchild.
NO_MODIFICATION_ALLOWED_ERR: Raised if the context node is a read only node and the content is being appended to its child list, or if the parent node of the context node is read only node and the content is being inserted in its child list.
INVALID_STATE_ERR: Raised if theLSParser.busyattribute istrue.LSException- PARSE_ERR: Raised if theLSParserwas unable to load the XML fragment. DOM applications should attach aDOMErrorHandlerusing the parameter " error-handler" if they wish to get details on the error.
public void setFilter(LSParserFilter filter)
When a filter is provided, the implementation will call out to the filter as it is constructing the DOM tree structure. The filter can choose to remove elements from the document being constructed, or to terminate the parsing early.
The filter is invoked after the operations requested by theDOMConfigurationparameters have been applied. For example, if " validate" is set totrue, the validation is done before invoking the filter.