/**
 * JBoss, Home of Professional Open Source.
 * Copyright 2014-2019 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jboss.pnc.client;

/**
 * @author <a href="mailto:matejonnet@gmail.com">Matej Lazar</a>
 */
public interface RemoteCollection<T> extends Iterable<T> {
    int size();
}

/**
 * JBoss, Home of Professional Open Source.
 * Copyright 2014-2019 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jboss.pnc.client;

import java.util.Iterator;
import java.util.NoSuchElementException;

/**
 * @author <a href="mailto:matejonnet@gmail.com">Matej Lazar</a>
 */
public interface RemoteCollection<T> extends Iterable<T> {
    int size();

    static<T> RemoteCollection<T> empty() {
        return new RemoteCollection<T>() {
            @Override
            public int size() {
                return 0;
            }

            @Override
            public Iterator<T> iterator() {
                return new Iterator<T>() {
                    @Override
                    public boolean hasNext() {
                        return false;
                    }

                    @Override
                    public T next() {
                        throw new NoSuchElementException();
                    }
                };
            }
        };
    }
}

Add RemoteCollection.empty method.