Simple dynamic hyperlink - java

I want to see JR create, if possible, a dynamic (for lack of a better term known to me) hyperlink:
This is the sql query which fetches the data:
select name,ID
from table
where condition1=65537;
What I want JR to do is to change the hyperlink reference expression which is initially:
"https://www.some_site.com/item=X"
X
needs to be the ID number and be able to be parsed as a normal link
I tried the more obvious ideas:
X=$F{ID} /// doesn't work
X=$F{ID}.intValue() /// doesn't work
Is it:
a) even possible?
b) if possible, how?
I might be missing something very obvious, so apologies if this is something already addressed.

Sorry for the possible spam
"https://www.some_site.com/ID="+$F{ID}
is now the hyperlink reference expression and it all works out, in all possible export formats of jasper

Related

Is it possible to remove tags (or sequences) and relate or remember them as indexes?

I'm working with HTML tags, and I need to interpret HTML documents. Here's what I need to achieve:
I have to recognize and remove HTML tags without removing the
original content.
I have to store the index of the previously existing markups.
So here's a example. Imagine that I have the following markup:
This <strong>is a</strong> message.
In this example, we have a String sequence with 35 characters, and markedup with strong tag. As we know, an HTML markup has a start and an end, and if we interpret the start and end markup as a sequence of characters, each also has a start and an end (a character index).
Again, in the previous example, the beggining index of the open/start tag is 5 (starts at index 0), and the end index is 13. The same logic goes to the close tag.
Now, once we remove the markup, we end up with the following:
This is a message.
The question:
How can I remember with this sequence the places where I could enter the markup again?
For example, once the markup has been removed, how do I know that I have to insert the opening tag in the X position/index, and the closing tag in the Y position/index... Like so:
This is a message.
5 9
index 5 = <strong>
index 9 = </strong>
I must remember that it is possible to find the following situation:
<a>T<b attribute="value">h<c>i<d>s</a> <g>i<h>s</h></g> </b>a</c> <e>t</e>e<f>s</d>t</f>.
I need to implement this in Java. I've figured out how to get the start and end index of each tag in a document. For this, I'm using regular expressions (Pattern and Matcher), but I still do not know how to insert the tags again properly (as described). I would like a working example (if possible). It does not have to be the best example (the best solution) in the world, but only that it works the right way for any kind of situation.
If anyone has not understood my question, please comment that I will do it better.
Thanks in advance.
EDIT
People in the comments are saying that I should not use regular expressions to work with HTML. I do not care to use or not regular expressions to solve this problem, I just want to solve it, no matter how (But of course, in the most appropriate way).
I mentioned that I'm using regular expressions, but I do not mind using another approach that presents the same solution. I read that a XML parser could be the solution. Is that correct? Is there an XML parser capable of doing all this what I need?
Again, Thanks in advance.
EDIT 2
I'm doing this edition now to explain the applicability of my problem (as asked). Well, before I start, I want to say that what I'm trying to do is something I've never done before, it's not something on my area, so it may not be the most appropriate way to do it. Anyway...
I'm developing a site where users are allowed to read content but can not edit it (edit or remove text). However, users can still mark/highlight excerpts (ranges) of the content present (with some stylization). This is the big summary.
Now the problem is how to do this (in Java). On the client side, for now, I was thinking of using TinyMCE to enable styling of content without text editing. I could save stylized text to a database, but this would take up a lot of space, since every client is allowed to do this, given that they are many clients. So if a client marks snippets of a paragraph, saving the paragraph back in the database for each client in the system is somewhat costly in terms of memory.
So I thought of just saving the range (indexes) of the markups made by users in a database. It is much easier to save just a few numbers than all the text with the styling required. In the case, for example, I could save a line / record in a table that says:
In X paragraph, from Y to Z index, the user P defined a ABC
stylization.
This would require a translation / conversion, from database to HTML, and HTML to database. Setting a converter can be easy (I guess), but I do not know how to get the indexes (following this logic). And then we stop again at the beginning of my question.
Just to make it clear:
If someone offers a solution that will cost money, such as a paid API, tool, or something similar, unfortunately this option is not feasible for me. I'm sorry :/
In a similar way, I know it would be ideal to do this processing with JavaScript (client-side). It turns out that I do not have a specialized JavaScript team, so this needs to be done on the server side (unfortunately), which is written in Java. I can only use a JavaScript solution if it is already ready, easy and quick to use. Would you know of any ready-made, easy-to-use library that can do it in a simple way? Does it exist?
You can't use a regular expression to parse HTML. See this question (which includes this rather epic answer as well as several other interesting answers) for more information, but HTML isn't a regular language because it has a recursive structure.
Any language that allows recursion isn't regular by definition, so you can't parse it with a regex.
Keep in mind that HTML is a context-free languages (or, at least, pretty close to context-free). See also the Chomsky hierarchy.

Dynamic Content Parsing

I am working with content parsing I executed the sample program for this i have taken a sample link
please visit the below link
http://www.equitymaster.com/stockquotes/sector.asp?sector=0%2CSOFTL&utm_source=top-menu&utm_medium=website&utm_campaign=performance&utm_content=key-sector
or
Click Here
in the above link i parsed the table data and store into java object.
BSE and NSE are not my exact requirement just I am taken sample example. the above link is developed in the tables they are not used id's and classes. in my example I parsed data using XPath
this is my Xpath
/html/body/table[4]/tbody/tr/td/table[2]/tbody/tr[2]/td[2]/font/table[2]
I selected and parsing it is working fine . here is a problem in future if they changed website structure my program will not work for sure. tell me any other way to parse data dynamically and able to store in database. display the results based on the condition even if they changed the webpage structure I used for this JSOUP api for this. Tell me any other ApI's which provide best support for this type of requirement
If you're trying to parse a page without any clear id/class to select your nodes, you have to try and rely on something else. Redefining the whole tree is indeed the weakest way of doing it, if anything is added/changed everything will collapse.
You could try relying on color: //table[#bgcolor="#c9d0e0"], the "GET MORE INFO" field: //table[tr/td//text()="GET MORE INFO"], the "More Info" there is on every line: //table[.//td//text()="&nbspMore Info&nbsp"]...
The idea is to find something ideally unique (if you can't find any unique criteria, table[color condition selecting a few tables][2] is still stronger walking the whole tree), present every time, and use that as an id.

How to use antlr to create SQL Select Query parser?

i am using squiggle to create dynamic select queries for postgresql, in one point of my application i need to reverse engineer the created select query and extract columns, tables, joins, orders,group by and .... from it, i googled a bit and found general sql parser which meets my demands but i need an open source solution to be able to modify it as i wish, i googled a bit more and read some where that i need antlr to write my own parser like fellas in hibernate did. the question is i don't know how to use it and not able to find an easy to understand example. the more important question is, considering scope of problem ( a select query) do i really need antlr to do this?
thank you
Don't reinvent the wheel. Use for example JSqlParser (github/jsqlparser). It comes with examples of extracting tablenames.

Using jquery with java for HTML

I've got a HTML website, in which there is some kind of data inside a table(I have no control in which way data is displayed on that website). I need to get/extract this table data.
i.e. nth row in the table has 2 columns, first columns text is "last update time", and the next column has some datestamp value. Using jquery I could say exactly that I want to get this tables nth row second column text which would give me some timestamp string.
Is there something like this in java, I will basically get the whole site and try to extract that information in the same manner as I described above. Does java have something similar?
Since javascript can be executed as a shell script as long as there is interpreter available, can something similar be done so that jquery functions are possible to invoke from java?
I think jsoup will help you.
Java can parse a DOM and you can interpret it that way. For a brief explanation, check out http://tutorials.jenkov.com/java-xml/dom-document-object.html
Its certainly not going to be as simple as writing a jquery function to do the same.

How best to implement user selectable variables in web application

I have a Java based web-application and a new requirement to allow Users to place variables into text fields that are replaced when a document or other output is produced. How have others gone about this?
I was thinking of having a pre-defined set of variables such as :
#BOOKING_NUMBER#
#INVOICE_NUMBER#
Then when a user enters some text they can specify a variable inline (select it from a modal or similar). For example:
"This is some text for Booking #BOOKING_NUMBER# that is needed by me"
When producing some output (eg. PDF) that uses this text, I would do a regex and find all variables and replace them with the correct value:
"This is some text for Booking 10001 that is needed by me"
My initial thought was something like Freemarker but I think that is too complex for my Users and would require them to know my DataModel (eww).
Thanks for reading!
D.
Have a look at java.text.MessageFormat - particularly the format method - as this is designed for exactly what you are looking for.
i.e.
MessageFormat.format("This is some text for booking {0} that is needed by me, for use with invoice {1}", bookingNumber, invoiceNumber);
You may even want to get the template text from a resource bundle, to allow for support of multiple languages, with the added ability to cope with the fact that {0} and {1} may appear in a different order in some languages.
UPDATE:
I just read your original post properly, and noticed the comment about the PDF.
This suggest that the template text is going to be significantly larger than a line or two.
In such cases, you may want to explore something like StringTemplate which seems better suited for this purpose - this comment is based solely on initial investigations, as I've not used it in anger.
I have used a similiar replacement token system before. I personally like something like.
[MYVALUE]
As it is easy for the user to type, and then I just use replacements to swap out the tokens for the real data.

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