Read functioning value from XML file using java

Question

I have 2 XML file . In one XML file is the form which contains x and y coordinate values . In second XML file contains all the functioning/operation related to first XML which gives an output as an graph image .

I need to know how can I read the function XML file specially for functioning in java program on button click ? I know to parse , but just normal parsing will work for the operation. What libraries do I have to pass for this ?

The functioning part is already there in XML . I just need to call it to show output.

part of form XML which will be used to save x and y coordinate:-

<cont format="%9.2f" hotlink="true" name="cont_2" refvar="gud/_ZSFR[29]" type="float" width="20" xpos="545" ypos="454">
            <PROPERTY min="0"/>
            <PROPERTY max="5000"/>
        </cont>

part of function xml file which will actually do operation of generating image by passing those form xml x and y values:-

<function name="string.length" return="filenamelength">file_name</function>
    <IF>
        <CONDITION>filenamelength>=1</CONDITION>
        <THEN>
            <op>new1content=new1content+_T"\\nR250="+_F%.3f"gud/_ZSFR[29]"</op>
            <op>new1content=new1content+_T"\\nR251="+_F%.3f"gud/_ZSFR[28]"</op>
<function name="doc.exist" return="mpf1ok">_T"\mpf\1.mpf" </function>

@SeeKing Not yet in terms of getting image from functioning xml file. I did just to parse form xml file from java to fill x and y coordinates . The coordinate functionality of generating image is in function xml file . Which I am unable to understand how to use it in java to read entire function and the library tht will do the functioning in java . — Rohit Ghosh
– Rohit Ghosh, Commented Feb 2, 2017 at 7:11

Kashif Sohail EF · Accepted Answer · 2017-02-02 06:29:47Z

1

There are two kinds of Libraries in java for parsing XML files. Streaming based and Tree based. If you just need to parse XML (Not concerned with generating XML) you can use Streaming API's are memory efficient. Stax is recommended in your case.

answered Feb 2, 2017 at 6:29

Kashif Sohail EF

191 bronze badge

Sign up to request clarification or add additional context in comments.

3 Comments

Rohit Ghosh Over a year ago

If I simply parse that XML file , will it create Image on the java file as the functioning of that XML file include creation of image ?

Kashif Sohail EF Over a year ago

What kind of image?

Kashif Sohail EF Over a year ago

Not, it will not directly create the image. When you are reading XML file, you need to decide on content you retrieved from XML file.

Jan Hanson · Accepted Answer · 2017-02-02 06:48:30Z

1

It sounds like what you need is a combination of:

javax.xml.parsers...
org.w3c.dom....

there is a good tutorial on extracting data from XML here at tutorialspoint their basic example shows the use of a method called Document.getElementByTagName(String tagName) which returns an Element object. depending on how specific your element is you can also check attributes using:

Element.getAttribute(String attrName)
Element.hasAttribute(String attrName)

this should allow you to pinpoint the tag that you need after which you can use the methods shown in the tutorial to extract the content of the tags.

Another simple XML tutorial in Java

answered Feb 2, 2017 at 6:48

Jan Hanson

1945 silver badges13 bronze badges

3 Comments

Rohit Ghosh Over a year ago

Yes , but not exactly this I want . I need to call libraries to do the function in java. this is the line doing the entire functioning <op>new1content=new1content+_T"\\nR250="+_F%.3f"gud/_ZSFR[29]"</op>

Jan Hanson Over a year ago

unless there is some framework i am unaware of that does this, XML is simply a markup language used for describing data, not for performing computation. Are you saying that you want your "functioning" lines to be an API call of some description, if so then you might want to have a look at JAXB which allows you to marshall/unmarshall XML into/from data objects that you can then manipulate in java. Either way the XML is only data, any generation of images will need to be done in java using the data provided in the XML, unless you embed the base64 image data directly into the XML.

Rohit Ghosh Over a year ago

That's valuable info . The thing is that data is in x and y coordinate and rest creation of graph(not exactly image) is in functioning xml . I am looking to it.

Collectives™ on Stack Overflow

Read functioning value from XML file using java

2 Answers 2

3 Comments

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related