org.w3c.dom
Interface DOMConfiguration
- DomLSParser, DomLSSerializer, GnomeDocument
public interface DOMConfiguration
The
DOMConfiguration interface represents the configuration
of a document and maintains a table of recognized parameters. Using the
configuration, it is possible to change
Document.normalizeDocument() behavior, such as replacing the
CDATASection nodes with
Text nodes or
specifying the type of the schema that must be used when the validation
of the
Document is requested.
DOMConfiguration
objects are also used in [
DOM Level 3 Load and Save]
in the
DOMParser and
DOMSerializer interfaces.
The parameter names used by the
DOMConfiguration object
are defined throughout the DOM Level 3 specifications. Names are
case-insensitive. To avoid possible conflicts, as a convention, names
referring to parameters defined outside the DOM specification should be
made unique. Because parameters are exposed as properties in the , names
are recommended to follow the section 5.16 Identifiers of [Unicode] with the addition of the character '-' (HYPHEN-MINUS) but it is not
enforced by the DOM implementation. DOM Level 3 Core Implementations are
required to recognize all parameters defined in this specification. Some
parameter values may also be required to be supported by the
implementation. Refer to the definition of the parameter to know if a
value must be supported or not.
Note: Parameters are similar to features and properties used in
SAX2 [
SAX].
The following list of parameters defined in the DOM:
-
"canonical-form"
-
true- [optional] Canonicalize the document according to the rules specified in [Canonical XML],
such as removing the
DocumentType node (if any) from the
tree, or removing superfluous namespace declarations from each element.
Note that this is limited to what can be represented in the DOM; in
particular, there is no way to specify the order of the attributes in the
DOM. In addition, Setting this parameter to true will also
set the state of the parameters listed below. Later changes to the state
of one of those parameters will revert "canonical-form" back to
false. Parameters set to false: "entities", "
normalize-characters", "cdata-sections". Parameters set to
true: "namespaces", "namespace-declarations", "well-formed",
"element-content-whitespace". Other parameters are not changed unless
explicitly specified in the description of the parameters.
-
false
- [required] (default)Do not canonicalize the document.
"cdata-sections"
-
true
- [required] (default)Keep
CDATASection nodes in the document.
false- [required]Transform
CDATASection nodes in the document into
Text nodes. The new Text node is then combined
with any adjacent Text node.
"check-character-normalization"
true- [optional] Check if the characters in the document are fully
normalized, as defined in appendix B of [XML 1.1]. When a
sequence of characters is encountered that fails normalization checking,
an error with the
DOMError.type equals to
"check-character-normalization-failure" is issued.
false- [required] (default)Do not check if characters are normalized.
"comments"
-
true
- [required] (default)Keep
Comment nodes in the document.
false- [required]Discard
Comment nodes in the document.
"datatype-normalization"
true- [optional] Expose schema normalized values in the tree, such as XML
Schema normalized values in the case of XML Schema. Since this parameter requires to have schema
information, the "validate" parameter will also be set to
true. Having this parameter activated when "validate" is
false has no effect and no schema-normalization will happen.
Note: Since the document contains the result of the XML 1.0
processing, this parameter does not apply to attribute value
normalization as defined in section 3.3.3 of [XML 1.0] and is only
meant for schema languages other than Document Type Definition (DTD).
-
false
- [required] (default) Do not perform schema normalization on the tree.
"element-content-whitespace"
true- [required] (default)Keep all whitespaces in the document.
false- [optional] Discard all
Text nodes that contain whitespaces in element
content, as described in
[element content whitespace]. The implementation is expected to use the attribute
Text.isElementContentWhitespace to determine if a
Text node should be discarded or not.
"entities"
-
true
- [required] (default)Keep
EntityReference nodes in the document.
-
false
- [required] Remove all
EntityReference nodes from the document,
putting the entity expansions directly in their place. Text
nodes are normalized, as defined in Node.normalize. Only
unexpanded entity references are kept in the document.
Note: This parameter does not affect Entity nodes.
"error-handler"
[required] Contains a DOMErrorHandler object. If an error is
encountered in the document, the implementation will call back the
DOMErrorHandler registered using this parameter. The
implementation may provide a default DOMErrorHandler object.
When called, DOMError.relatedData will contain the closest
node to where the error occurred. If the implementation is unable to
determine the node where the error occurs,
DOMError.relatedData will contain the Document
node. Mutations to the document from within an error handler will result
in implementation dependent behavior.
"infoset"
-
true
- [required]Keep in the document the information defined in the XML Information Set [XML Information Set]
.This forces the following parameters to
false: "
validate-if-schema", "entities", "datatype-normalization", "cdata-sections
".This forces the following parameters to true: "
namespace-declarations", "well-formed", "element-content-whitespace", "
comments", "namespaces".Other parameters are not changed unless
explicitly specified in the description of the parameters. Note that
querying this parameter with getParameter returns
true only if the individual parameters specified above are
appropriately set.
false- Setting
infoset to
false has no effect.
"namespaces"
-
true
- [required] (default) Perform the namespace processing as defined in .
false- [optional] Do not perform the namespace processing.
"namespace-declarations"
This parameter has no effect if the
parameter "namespaces" is set to false.
true- [required] (default) Include namespace declaration attributes, specified or defaulted from
the schema, in the document. See also the sections "Declaring Namespaces"
in [XML Namespaces]
and [XML Namespaces 1.1]
.
false- [required]Discard all namespace declaration attributes. The namespace prefixes (
Node.prefix) are retained even if this parameter is set to
false.
"normalize-characters"
true- [optional] Fully
normalized the characters in the document as defined in appendix B of [XML 1.1].
-
false
- [required] (default)Do not perform character normalization.
"schema-location"
[optional] Represent a DOMString object containing a list of URIs,
separated by whitespaces (characters matching the nonterminal
production S defined in section 2.3 [XML 1.0]), that
represents the schemas against which validation should occur, i.e. the
current schema. The types of schemas referenced in this list must match
the type specified with schema-type, otherwise the behavior
of an implementation is undefined. The schemas specified using this
property take precedence to the schema information specified in the
document itself. For namespace aware schema, if a schema specified using
this property and a schema specified in the document instance (i.e. using
the schemaLocation attribute) in a schema document (i.e.
using schema import mechanisms) share the same
targetNamespace, the schema specified by the user using this
property will be used. If two schemas specified using this property share
the same targetNamespace or have no namespace, the behavior
is implementation dependent. If no location has been provided, this
parameter is null.
Note: The "schema-location" parameter is ignored
unless the "schema-type" parameter value is set. It is strongly
recommended that Document.documentURI will be set so that an
implementation can successfully resolve any external entities referenced.
"schema-type"
[optional] Represent a DOMString object containing an absolute URI
and representing the type of the schema language used to validate a
document against. Note that no lexical checking is done on the absolute
URI. If this parameter is not set, a default value may be provided by
the implementation, based on the schema languages supported and on the
schema language used at load time. If no value is provided, this
parameter is null.
Note: For XML Schema [XML Schema Part 1]
, applications must use the value
"http://www.w3.org/2001/XMLSchema". For XML DTD [XML 1.0],
applications must use the value
"http://www.w3.org/TR/REC-xml". Other schema languages are
outside the scope of the W3C and therefore should recommend an absolute
URI in order to use this method.
"split-cdata-sections"
-
true
- [required] (default)Split CDATA sections containing the CDATA section termination marker
']]>'. When a CDATA section is split a warning is issued with a
DOMError.type equals to
"cdata-sections-splitted" and
DOMError.relatedData equals to the first
CDATASection node in document order resulting from the split.
-
false
- [required]Signal an error if a
CDATASection contains an
unrepresentable character.
"validate"
true- [optional] Require the validation against a schema (i.e. XML schema, DTD, any
other type or representation of schema) of the document as it is being
normalized as defined by [XML 1.0]. If
validation errors are found, or no schema was found, the error handler is
notified. Schema-normalized values will not be exposed according to the
schema in used unless the parameter "datatype-normalization" is
true. This parameter will reevaluate:
- Attribute nodes with
Attr.specified equals to false, as specified in
the description of the Attr interface;
- The value of the
attribute
Text.isElementContentWhitespace for all
Text nodes;
- The value of the attribute
Attr.isId for all Attr nodes;
- The attributes
Element.schemaTypeInfo and Attr.schemaTypeInfo.
Note: "validate-if-schema" and "validate" are mutually
exclusive, setting one of them to true will set the other
one to false. Applications should also consider setting the
parameter "well-formed" to true, which is the default for
that option, when validating the document.
false- [required] (default) Do not accomplish schema processing, including the internal subset
processing. Default attribute values information are kept. Note that
validation might still happen if "validate-if-schema" is
true
.
"validate-if-schema"
true- [optional]Enable validation only if a declaration for the document element can be
found in a schema (independently of where it is found, i.e. XML schema,
DTD, or any other type or representation of schema). If validation is
enabled, this parameter has the same behavior as the parameter "validate"
set to
true.
Note: "validate-if-schema" and "validate" are mutually
exclusive, setting one of them to true will set the other
one to false.
false- [required] (default) No schema processing should be performed if the document has a schema,
including internal subset processing. Default attribute values
information are kept. Note that validation must still happen if "validate
" is
true.
"well-formed"
true- [required] (default) Check if all nodes are XML well formed according to the XML version in
use in
Document.xmlVersion:
- check if the attribute
Node.nodeName contains invalid characters according to its
node type and generate a DOMError of type
"wf-invalid-character-in-node-name", with a
DOMError.SEVERITY_ERROR severity, if necessary;
- check if
the text content inside
Attr, Element,
Comment, Text, CDATASection nodes
for invalid characters and generate a DOMError of type
"wf-invalid-character", with a
DOMError.SEVERITY_ERROR severity, if necessary;
- check if
the data inside
ProcessingInstruction nodes for invalid
characters and generate a DOMError of type
"wf-invalid-character", with a
DOMError.SEVERITY_ERROR severity, if necessary;
-
false
- [optional] Do not check for XML well-formedness.
The resolution of the system identifiers associated with entities is
done using
Document.documentURI. However, when the feature
"LS" defined in [
DOM Level 3 Load and Save]
is supported by the DOM implementation, the parameter
"resource-resolver" can also be used on
DOMConfiguration
objects attached to
Document nodes. If this parameter is
set,
Document.normalizeDocument() will invoke the resource
resolver instead of using
Document.documentURI.
See also the
Document Object Model (DOM) Level 3 Core Specification.
- DOM Level 3
boolean | canSetParameter(String name, Object value)- Check if setting a parameter to a specific value is supported.
|
Object | getParameter(String name)- Return the value of a parameter if known.
|
DOMStringList | getParameterNames()- The list of the parameters supported by this
DOMConfiguration object and for which at least one value
can be set by the application.
|
void | setParameter(String name, Object value)- Set the value of a parameter.
|
canSetParameter
public boolean canSetParameter(String name,
Object value) Check if setting a parameter to a specific value is supported.
name - The name of the parameter to check.value - An object. if null, the returned value is
true.
true if the parameter could be successfully set
to the specified value, or false if the parameter is
not recognized or the requested value is not supported. This does
not change the current value of the parameter itself.
getParameter
public Object getParameter(String name)
throws DOMException Return the value of a parameter if known.
name - The name of the parameter.
- The current object associated with the specified parameter or
null if no object has been associated or if the
parameter is not supported.
DOMException - NOT_FOUND_ERR: Raised when the parameter name is not recognized.
getParameterNames
public DOMStringList getParameterNames()
The list of the parameters supported by this
DOMConfiguration object and for which at least one value
can be set by the application. Note that this list can also contain
parameter names defined outside this specification.
setParameter
public void setParameter(String name,
Object value)
throws DOMException Set the value of a parameter.
name - The name of the parameter to set.value - The new value or null if the user wishes to
unset the parameter. While the type of the value parameter is
defined as DOMUserData, the object type must match the
type defined by the definition of the parameter. For example, if
the parameter is "error-handler", the value must be of type
DOMErrorHandler.
DOMException - NOT_FOUND_ERR: Raised when the parameter name is not recognized.
NOT_SUPPORTED_ERR: Raised when the parameter name is recognized
but the requested value cannot be set.
TYPE_MISMATCH_ERR: Raised if the value type for this parameter
name is incompatible with the expected value type.