import java.util.Enumeration;

/**
 * An empty {@link Enumeration}.
 *
 * @author higa
 * @param <T> the type of elements
 */
public class EmptyEnumeration<T> extends IteratorEnumeration<T> {

    /**
     * Creates an {@link EmptyEnumeration}.
     */
    public EmptyEnumeration() {
        super(new EmptyIterator<T>());
    }

        @Override
        public java.util.Enumeration<String> getHeaders(String name) {
            return java.util.Collections.emptyEnumeration();
        }

        @Override
        public java.util.Enumeration<String> getHeaderNames() {
            return java.util.Collections.emptyEnumeration();
        }

        @Override
        public int getIntHeader(String name) {
            return -1;
        }

        @Override
        public java.util.Enumeration<String> getHeaders(String name) {
            return java.util.Collections.emptyEnumeration();
        }

        @Override
        public java.util.Enumeration<String> getHeaderNames() {
            return java.util.Collections.emptyEnumeration();
        }

        @Override
        public int getIntHeader(String name) {
            return -1;
        }

        // Setup servlet config
        lenient().when(servletConfig.getServletContext()).thenReturn(servletContext);
        lenient().when(servletConfig.getInitParameterNames()).thenReturn(Collections.emptyEnumeration());

        // Setup request session
        lenient().when(request.getSession()).thenReturn(session);
        lenient().when(request.getSession(false)).thenReturn(session);