java - update list according to complex logic -

i'm having following code , need add instance (type object) item object list(done in last if) need find full key match . fromprop , toprop field type object in instance (are keys can username , customer ,number,f1 etc ). code working on first match field (in last if statement), if first match found add data item list want find full key match i.e if have 3 keys when match add 'toentityinstance' item object. how should ?

for (object fromentityinstance : fromentityinstances) {              list<object> itemobject = new arraylist<object>();              (string[] prop : deppropmappings) {                  // properties related keys                 fromprop = prop[0];                 toprop = prop[1];                  object fromvalue = getinstancevalue(fromprop, fromentityinstance);                  (object toentityinstance : toentityinstances) {                      object tovalue = getinstancevalue(toprop, toentityinstance);                      if (fromvalue.equals(tovalue)) {                      itemobject.add(toentityinstance);                      }                  }             } 

for example entities can fromentityinstance

f1=mark f2=abc f3=test1 f4=test1 f5=test1 

toentityinstance

f1=mark f2=abc f3=test1 f4=test1 f5=test1  f1=mark f2=abc f3=test1 f4=test1 f5=test1  f1=jhon f2=yyyy f3=test1 f4=test1 f5=test1 

and in deppropmappings have 2 instances keys

first instance

  fromprop = f1;   toprop = f1; 

second instance

 fromprop = f2;  toprop = f2; 

so need add 2 first enities (where f1=mark & f2=abc ) toentityinstance itemobject . code work if found match between f1 ignore f2...

i think count num of key @ begining , if num of key are indentica l update list not sure how that

your loop nesting has wrong order. current code add toentityinstance list twice if both deppropmappings match. try this:

for (object fromentityinstance : fromentityinstances) {      list<object> itemobject = new arraylist<object>();      (object toentityinstance : toentityinstances) {         boolean matches = true;          (string[] prop : deppropmappings) {              // properties related keys             fromprop = prop[0];             toprop = prop[1];              object fromvalue = getinstancevalue(fromprop, fromentityinstance);             object tovalue = getinstancevalue(toprop, toentityinstance);              // note: make sure fromvalue cannot null. if cannot             // guaranteed, add check here.             if (!fromvalue.equals(tovalue)) {                 // if value mismatches, can stop checking remaining                 // properties.                 matches = false;                 break;             }         }          if (matches) {             // properties match             itemobject.add(toentityinstance);         }     } }