Language for binding scalable vector graphics elements to java classes

• US 7,962,895 B2
• Filed: 07/20/2006
• Issued: 06/14/2011
• Est. Priority Date: 07/20/2006
• Status: Active Grant

• Current Assignee: Oracle America, Inc. (Oracle Corporation)
• Original Assignee: Oracle America, Inc. (Oracle Corporation)
• Inventors: Liu, Peter T.
• Primary Examiner(s): Dam; Tuan Q
• Assistant Examiner(s): Lee; Marina
• Application Number:
  US11/490,651
• Publication Number:
  US 20080127153A1
• Time in Patent Office: 1,790 Days
• Field of Search: None
• US Class Current: 717/116
• CPC Class Codes: G06F 9/4486 Formation of subprogram jump address

Abstract

According to a technique described herein, a binding document comprises one or more “<bind>” element instances. Each “<bind>” element instance indicates an association between (a) an SVG element instance and (b) a class. When a binding'"'"'s name is passed to a “createFromTemplate( )” method, the method processes all of the “<bind>” element instances that are associated within that name. For each such “<bind>” element instance, the method (a) creates, in an SVG DOM tree, a clone of a node that corresponds to an SVG element instance indicated in that “<bind>” element instance, (b) instantiates an object that is an instance of a class that is indicated in that “<bind>” element instance, and (c) stores data that establishes a binding between the clone node and the object. Methods of the object can be invoked to affect and/or alter attributes of the clone node to which the object is bound.

Claims

1. A machine-implemented method for binding program-defined objects to Document Object Model (DOM) nodes, the method comprising:

receiving a request to create a scalable vector graphics (SVG) element instance from an SVG element template, wherein the request comprises a binding name, and wherein the SVG element instance comprises an extensible markup language (XML) code for describing two-dimensional graphics;

selecting, from a binding document, the SVG element template using the binding name, wherein the binding document comprises an association between the SVG element template, a node in a SVG DOM tree, and a software object class, wherein the association is written in XML;

obtaining, from the binding document, a software object class identifier, wherein the software object class identifier indicates the software object class associated with the SVG element template;

obtaining, from the binding document, a node reference indicating the node in the SVG DOM tree associated with the SVG element template;

selecting, in the SVG DOM tree, the node that corresponds to the SVG element template using the node reference;

creating, in the SVG DOM tree, a clone of the selected node for the SVG element instance;

instantiating, in response to the creating, a software object instance of the software object class; and

storing data that indicates a binding between the software object instance and the clone.

2. The method of claim 1, wherein the binding document comprises one or more binding expressions that are expressed as XML elements.

3. The method of claim 1, wherein said creating of the clone causes a display to show a shape that corresponds to the clone.

4. The method of claim 1, further comprising:

invoking, in response to said instantiating, a particular method of the software object class that alters one or more attributes of the clone,

wherein, when the one or more attributes are altered, a display that shows a shape that corresponds to the clone is automatically updated to reflect alterations in the one or more attributes.

5. The method of claim 1,

wherein the request to create the SVG element instance is an invocation of a creation method, and

wherein the binding name is passed as a parameter of the creation method.

6. The method of claim 5, wherein selecting the SVG element template from the binding document comprises:

locating, in the binding document, a “

template”

element instance whose “

id”

attribute value matches the binding name; and

locating, in the binding document, a “

bind”

element instance that is enclosed within the “

template”

element instance.

7. The method of claim 6,

wherein obtaining the node reference comprises:

reading an attribute value of an “

svg-ref”

attribute of the “

bind”

element instance; and

locating, in an SVG document, an SVG element instance whose “

id”

attribute value matches the attribute value of the “

svg-ref”

attribute.

8. The method of claim 6,

wherein obtaining the software object class identifier comprises:

reading an attribute value of a “

class”

attribute of the “

bind”

element instance;

wherein instantiating the software object instance comprises instantiating the software object instance from a JAVA class whose class name matches the attribute value of the “

class”

attribute.

9. The method of claim 6,

wherein selecting obtaining the node reference comprises:

reading an attribute value of an “

svg-ref”

attribute of the “

bind”

element instance; and

locating, in an SVG document, an SVG element instance whose “

id”

attribute value matches the attribute value of said “

svg-ref”

attribute;

wherein obtaining the software object class identifier comprises;

reading an attribute value of a “

class”

attribute of the “

bind”

element instance; and

wherein instantiating the software object instance comprises instantiating the software object instance from a JAVA class whose class name matches the attribute value of the “

class”

attribute.

10. The method of claim 1, wherein the binding document indicates at least one binding between (a) another binding defined in the binding document and (b) an invocable method of a JAVA class.

11. The method of claim 1, further comprising:

reading an updated version of the binding document in which one or more attributes have been added to a “

<

bind>

”

element in the binding document; and

invoking a “

setBindingAttributes( )”

method of the object, wherein invoking the “

setBindingAttributes( )”

method includes passing, as a parameter to the “

setBindingAttributes( )”

method, a “

Binding”

instance that can be queried to return attributes in the “

<

bind>

”

element.

12. The method of claim 11, further comprising:

overriding the “

setBindingAttributes( )”

method to process customized attribute extensions.

13. A non-transitory machine-readable medium carrying one or more sequences of instructions, which instructions, when executed by one or more processors, cause the one or more processors to carry out steps comprising:

receiving a request to create a scalable vector graphics (SVG) element instance from an SVG element template, wherein the request comprises a binding name, and wherein the SVG element instance comprises an extensible markup language (XML) code for describing two-dimensional graphics;

selecting, from a binding document, the SVG element template using the binding name, wherein the binding document comprises an association between the SVG element template, a node in a SVG DOM tree, and a software object class, wherein the association is written in XML;

obtaining, from the binding document, a software object class identifier associated with the SVG element template, wherein the software object class identifier indicates a software object class;

obtaining, from the binding document, a node reference indicating the node in the SVG DOM tree associated with the SVG element template;

selecting, in the SVG DOM tree, the node that corresponds to the SVG element template using the node reference;

creating, in the SVG DOM tree, a clone of the selected node for the SVG element;

instantiating, in response to the creating, a software object instance of the software object class; and

storing data that indicates a binding between the software object instance and the clone.

14. The non-transitory machine-readable medium of claim 13, wherein the binding document comprises one or more binding expressions that are expressed as XML elements.

15. The non-transitory machine-readable medium of claim 13, wherein said creating of the clone causes a display to show a shape that corresponds to the clone.

16. The non-transitory machine-readable medium of claim 13, wherein said steps further comprise:

invoking, in response to said instantiating, a particular method of the software object class that alters one or more attributes of the clone,

wherein, when the one or more attributes are altered, a display that shows a shape that corresponds to the clone is automatically updated to reflect alterations in the one or more attributes.

17. The non-transitory machine-readable medium of claim 13,

wherein the request to create the SVG element instance is an invocation of a creation method, and

wherein the binding name is passed as a parameter of the creation method.

18. The non-transitory machine-readable medium of claim 17, wherein selecting the SVG element template from the binding document comprises:

locating, in the binding document, a “

template”

element instance whose “

id”

attribute value matches the binding name; and

locating, in the binding document, a “

bind”

element instance that is enclosed within the “

template”

element instance.

19. The non-transitory machine-readable medium of claim 18,

wherein obtaining the node reference comprises:

reading an attribute value of an “

svg-ref”

attribute of the “

bind”

element instance; and

locating, in an SVG document, an SVG element instance whose “

id”

attribute value matches the attribute value of the “

svg-ref”

attribute.

20. The non-transitory machine-readable medium of claim 18,

wherein obtaining the software object class identifier comprises:

reading an attribute value of a “

class”

attribute of the “

bind”

element instance;

wherein instantiating the software object instance comprises instantiating the software object instance from a JAVA class whose class name matches the attribute value of the “

class”

attribute.

21. The non-transitory machine-readable medium of claim 18,

wherein obtaining the node reference comprises:

reading an attribute value of an “

svg-ref”

attribute of the “

bind”

element instance; and

locating, in an SVG document, an SVG element instance whose “

id”

attribute value matches the attribute value of said “

svg-ref”

attribute;

wherein obtaining the software object class identifier comprises;

reading an attribute value of a “

class”

attribute of the “

bind”

element instance; and

wherein instantiating the software object instance comprises instantiating the software object instance from a JAVA class whose class name matches the attribute value of the “

class”

attribute.

22. The non-transitory machine-readable medium of claim 13, wherein the binding document indicates at least one binding between (a) another binding defined in the binding document and (b) an invocable method of a JAVA class.

23. The non-transitory machine-readable medium of claim 13, wherein said steps further comprise:

reading an updated version of the binding document in which one or more attributes have been added to a “

<

bind>

”

element in the binding document; and

invoking a “

setBindingAttributes( )”

method of the object, wherein invoking the “

setBindingAttributes( )”

method includes passing, as a parameter to the “

setBindingAttributes( )”

method, a “

Binding”

instance that can be queried to return attributes in the “

<

bind>

”

element.

24. the machine-readable medium of claim 23, wherein said steps further comrpise:

overriding the “

setBinding attributes( )”

method to process customized attribute extension.