Single Report file with embedded subreports

[2006 IR Open Discussion]

By: Peter Henderson - phenderson

Single Report file with embedded subreports

2003-08-19 15:40

I need to compile a report which contains subreports into a single .japser file, with no external dependancies.

 

My current solution is to convert the subreports .japer files into

new ByteArrayInputStream( new byte[]{-84,-19,0,5,115,114 .... )

 

and use java.io.Inputstream as my Subreport expression type.

 

This works, but Im sure im missing an easier solution.

As a down side, this method turns 2 20k japers files into a 300k jasper file, not ideal + it slows down report filling.

 

 

 

 

 

code to convet a jasper file into a byte array input stream.

String subreportFilename = "contact_category_subreport.jasper";

StringBuffer data = new StringBuffer(50000);

try {

FileInputStream fis = new FileInputStream(subreportFilename );

data.append( "new ByteArrayInputStream( new byte[]{" );

int count=0;

int bt = -1;

while( (bt=fis.read())!=-1 ) {

byte bb = (byte)bt;

data.append( Byte.toString(bb) ); // Integer.toString(bt) );

data.append(',');

count++;

if( count%80==0 ) {

data.append('n');

}

}

data.append("})");

} catch(Exception e) {

System.err.println("Failed " + e );

}

System.out.println("Data=" + data);