regex - replacing the carriage return with white space in java -


i having below string in string variable in java.

rule "6" no-loop true     when         string prefix = null;     prefix = "900";     string style = null;     style = "490";     string  grade = null;     grade = "gl";     double baseprice = 0.0;     baseprice = 837.00;     string rulename = null;     rulename = "sivm_base_price_006 rahul kumar singh";     productconfigurationcreator.createfact(drools, prefix, style,grade,baseprice,rulename); end rule "5" no-loop true     when         string prefix = null;     prefix = "800";     string style = null;     style = "481";     string  grade = null;     grade = "fl";     double baseprice = 0.0;     baseprice = 882.00;     string rulename = null;     rulename = "sivm_base_price_005";     productconfigurationcreator.createfact(drools, prefix, style,grade,baseprice,rulename); end

i need replace carriage return between "then" , "end" keyword white space becomes below code:

rule "6" no-loop true     when         string prefix = null;     prefix = "900";     string style = null;     style = "490";     string  grade = null;     grade = "gl";     double baseprice = 0.0;     baseprice = 837.00;     string rulename = null;     rulename = "sivm_base_price_006 rahul kumar singh";     productconfigurationcreator.createfact(drools, prefix, style,grade,baseprice,rulename); end  rule "5" no-loop true     when         string prefix = null;     prefix = "800";     string style = null;     style = "481";     string  grade = null;     grade = "fl";     double baseprice = 0.0;     baseprice = 882.00;     string rulename = null;     rulename = "sivm_base_price_005";     productconfigurationcreator.createfact(drools, prefix, style,grade,baseprice,rulename); end

in above 2 example of string set, second correct format need. however, in first set, getting :

rulename = "sivm_base_price_006 rahul kumar singh";

this perticulerly needs this:

rulename = "sivm_base_price_006 rahul kumar singh";

and need ensure doesn't effect thing else in string. need replace "carriage return" white space , make in 1 line. requirment. tried replace , replaceall method of string not works properly.

problem:

i need in between string "then" , "end" , in whenever there carriage return in between 2 double quaotes "" ""; need replace carriage return white space , make in 1 line.

thanks

edit:

drt:

template header prefix style product  package com.xx import com.xx.drools.productconfigurationcreator;  template "productsetup" rule "product_@{row.rownumber}" no-loop true     when           string prefix = null;       prefix = "@{prefix}";       string style = null;       prefix = "@{style}";       string product = null;       product = "@{product}";       productconfigurationcreator.createproductfact(drools,prefix,style,product); end end template

the excel , drt demostration purpose. in image, in product column, there "sofas \rkumar shorav". creating problem. generate below:

product = "sofas kumar shorav";

i need below:

product = "sofas kumar shorav";

then excel data :

attached image.enter image description here

you might there bug in org.drools.template.parser.stringcell, method 

public void addvalue(map<string, object> vars) {     vars.put(column.getname(), value); }

here, value added map string not take account string values expanded string literals. therefore, embedded newline should converted escape sequence \n. might try patch:

public void addvalue(map<string, object> vars) {     string h = value.replaceall( "\n", "\\\\n" );     vars.put(column.getname(), h); }

take source file, put suitable subdirectory, compile class file , make sure root directory precedes drools-templates-6.2.0.final-sources.jar in class path. should see

rulename = "sivm_base_price_006\nrahul kumar singh";

in generated drl file. obviously, not space, but written in spreadsheet cell!

i suggest (urgently) do not follow approach. reason strings not always expanded between quotes, , replacement result in invalid code. there no remedy template compiler "dumb" , not "know" expanding.

if string in spreadsheet contains line break, template expansion must render faithfully, , break line there. if produces invalid (java) code: why line break entered in first place? there absolutely no reason not have space in cell if that's want.


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