c# - Custom resolve nested dependencies -
suppose following class structure:
classa (iclassb classb, iclassc classc) : iclassa classb (iclassc classc) : iclassb classc1 () : iclassc classc2 () : iclassc suppose want use classc1 whenever used resolve iclassa, i.e. container.getinstance<iclassa>() return
new classa( new classb (new classc1()), new classc1() ) can in structuremap? (ideally, for<classa>().nest(x => x.for<iclassc>().use<classc1>()), do.)
this got:
public interface iclassa { } public interface iclassb { } public interface iclassc { } public class classa: iclassa { public classa(iclassb classb, iclassc classc) { console.writeline("classa"); console.writeline(" classb: {0}", classb.gettype()); console.writeline(" classc: {0}", classc.gettype()); } } public class classb : iclassb { public classb(iclassc classc) { console.writeline("classb"); console.writeline(" classc: {0}", classc.gettype()); } } public class classc1 : iclassc { public classc1() { console.writeline("classc1"); } } public class classc2 : iclassc { public classc2() { console.writeline("classc2"); } } class program { static void main(string[] args) { icontainer container = configuredependencies(); container.getinstance<iclassa>(); container.getinstance<iclassb>(); } private static icontainer configuredependencies() { return new container(x => { x.for<iclassa>().use<classa>(); x.for<iclassb>().use<classb>(); x.for<iclassc>().use(z => z.roottype == typeof(classa) ? (iclassc) z.getinstance<classc1>() : z.getinstance<classc2>()); }); } } concrete type of iclassc determined roottype.
this output:
classc1 classb classc: mongodbenumerable.classc1 classa classb: mongodbenumerable.classb classc: mongodbenumerable.classc1 classc2 classb classc: mongodbenumerable.classc2 it shows classc1 used constructing classa , dependencies constructing separate iclassb used classc2.
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