Say I have this code -
public interface ParentInterface1 {
public List<? extends ChildInterface1> getChildren();
public void setChildren(List<? extends ChildInterface1> children);
}
public interface ParentInterface2 {
public List<? extends ChildInterface2> getChildren();
public void setChildren(List<? extends ChildInterface2> children);
}
public interface ChildInterface1 {
public String getField();
public void setField(String field);
}
public interface ChildInterface2 {
public String getField();
public void setField(String field);
}
public class LParentImpl implements ParentInterface1, ParentInterface2 {
private List<ChildImpl> list;
public List<ChildImpl> getChildren() {
return list;
}
public void setChildren(List<... wants to accept ChildImpl, which
implements ChildInterface1 & ChildInterface2> children) {
throw new UnsupportedOperationException("Not supported yet.");
}
}
public class ChildImpl implements ChildInterface1, ChildInterface2 {
private String field;
public String getField() {
return field;
}
public void setField(String field) {
this.field = field;
}
}
Is there a way to make the setChildren() in the ParentImpl class work, without removing the Generic typing completely from the interfaces and implementation?
I'd like to do something like -
public void setChildren(List<? extends ChildInterface1 & ChildInterface2> children)
This sort of interface/implementation structure is valid for non Generic types, but it seems some aspect of the run-time erasure of Generics might make this impossible? Or am I missing some magic syntax?
Edit: Using the List<? extends ChildInterface1 & ChildInterface2> yields this compile error -
...\ParentImpl.java:20: > expected
public void setChildren(List<? extends ChildInterface1 & ChildInterface2> children) {