nsISupports
Last changed in Gecko 1.9 (Firefox 3)Each result is identified by an id, which must be unique within the set of results produced from a query. The result may optionally be identified by an RDF resource. Generally, the result and its id will be able to uniquely identify a node in the source data, such as an RDF or XML node. In other contexts, such as a database query, a result would represent a particular record. A result is expected to only be created by a query processor. Each result also contains a set of variable bindings. The value for a particular variable may be retrieved using the getBindingFor() and getBindingObjectFor() methods.
Method overview
AString getBindingFor(in nsIAtom aVar); |
nsISupports getBindingObjectFor(in nsIAtom aVar); |
void hasBeenRemoved(); |
void ruleMatched(in nsISupports aQuery, in nsIDOMNode aRuleNode); |
Attributes
| Attribute | Type | Description |
id |
AString |
ID of the result. The DOM element created for this result, if any, will have its id attribute set to this value. The id must be unique for a query. |
isContainer |
boolean |
true if the result represents a container. Read only. |
isEmpty |
boolean |
true if the result represents an empty container. Read only. |
mayProcessChildren |
boolean |
true if the template builder may use this result as the reference point for additional recursive processing of the template. The template builder will reprocess the template using this result as the reference point and generate output content that is expected to be inserted as children of the output generated for this result. If false, child content is not processed. This property identifies only the default handling and may be overridden by syntax used in the template. Read only. |
resource |
|
Resource for the result, which may be null. If set, the resource uri must be the same as the ID property. Read only. |
type |
AString |
The type of the object. The predefined value 'separator' may be used for separators. Other values may be used for application specific purposes. Read only. |
Methods
getBindingFor()
Get the string representation of the value of a variable for this result. This string will be used in the action body from a template as the replacement text. For instance, if the text ?name appears in an attribute within the action body, it will be replaced with the result of this method. The question mark is considered part of the variable name, thus aVar should be ?name and not simply name.
AString getBindingFor( in nsIAtom aVar );
Parameters
-
aVar - The variable to look up.
Return value
The value for the variable or a null string if it has no value.
getBindingObjectFor()
Get an object value for a variable such as ?name for this result. This method may return null for a variable, even if getBindingFor() returns a non-null value for the same variable. This method is provided as a convenience when sorting results.
nsISupports getBindingObjectFor( in nsIAtom aVar );
Parameters
-
aVar - The variable to look up.
Return value
The value for the variable or null if it has no value.
hasBeenRemoved()
Indicate that the output for a result has been removed and that the result is no longer being used by the builder.
void hasBeenRemoved();
Parameters
None.
ruleMatched()
Indicate that a particular rule of a query has matched and that output will be generated for it. Both the query as compiled by the query processor's nsIXULTemplateQueryProcessor.compileQuery() method and the XUL <rule> element are supplied. The query must always be one that was compiled by the query processor that created this result. The <rule> element must always be a child of the <query> element that was used to compile the query.
void ruleMatched( in nsISupports aQuery, in nsIDOMNode aRuleNode );
Parameters
-
aQuery - The query that matched.
-
aRuleNode - The rule node that matched.