Examples for Chapter 10 - RESTful Java with JAX-RS 2.0 - page 304

UriBuilder builder = uriInfo . getAbsolutePathBuilder ();
builder . queryParam ( "start" , "{start}" );
builder . queryParam ( "size" , "{size}" );

Here, the code defines a URI template by using the UriBuilder passed back from
UriInfo.getAbsolutePathBuilder() . The start and size query parameters are added to
the template. Their values are populated using template parameters later on when the actual
links are built.

ArrayList < Customer > list = new new ArrayList < Customer >();

ArrayList < Link > links = new new ArrayList < Link >();

synchronized synchronized ( customerDB )

{

int int i = 0 ;

for for ( Customer customer : customerDB . values ())

{

iif ( i >= start && i < start + size )
list . add ( customer );

i ++;

}

The code then gathers up the Customer instances that will be returned to the client based on
the start and size parameters. All this code is done within a synchronized block to pro-
tect against concurrent access on the customerDB map.

// next link
iif ( start + size < customerDB . size ())
{

int int next = start + size ;

URI nextUri = builder . clone (). build ( next , size );
Link nextLink = Link . fromUri ( nextUri )
. rel ( "next" ). type ( "application/xml" ). build ();

links . add ( nextLink );

}
// previous link
iif ( start > 0 )
{

int int previous = start - size ;

iif ( previous < 0 ) previous = 0 ;
URI previousUri = builder . clone (). build ( previous , size );
Link previousLink = Link . fromUri ( previousUri )
. rel ( "previous" )
. type ( "application/xml" ). build ();

links . add ( previousLink );

}