Description Jason Rogers 2007-04-12 14:13:35 EDT

Build ID: I20070323-1616

Steps To Reproduce:
1. See code in the "More information" section.

In the example, the line "Map.Entry<String, String> entry : myMap().entrySet()" gives the following error: "Type mismatch: cannot convert from element type Object to Map.Entry<String,String>".

I could be wrong but this smells like a bug (the cream-filled, crunchy kind).  The generic nature of "myMap" has nothing to do with the generic nature of the enclosing class nor of the inner class.  The error is fixed if you change the extends clause of the inner class to include the generic markup (eg. "extends GenericsBugInEclipse<T>" instead of "extends GenericsBugInEclipse").

This happens in a 3.2 build as well.

More information:
import java.util.HashMap;
import java.util.Map;

public class GenericsBugInEclipse<T> {
	
	private final Map<String, String> myMap;
	private final T theGenericThing;
	
	private GenericsBugInEclipse(T something) {
		this.myMap = new HashMap<String, String>();
		this.theGenericThing = something;
	}
	
    public static class InnerClassThatShowsBug extends GenericsBugInEclipse {
    	public InnerClassThatShowsBug() {
    		super(null);
		}
    	
    	public void printMap() {
    		for (Map.Entry<String, String> entry : myMap().entrySet()) {
				System.out.println(entry.getKey() + " => " + entry.getValue());
			}
    	}
    }
    
    protected Map<String, String> myMap() {
    	return myMap;
	}
}