lombok/website/usageExamples/experimental/DelegateExample_pre.jpage

import java.util.ArrayList;
import java.util.Collection;

import lombok.experimental.Delegate;

public class DelegationExample {
	private interface SimpleCollection {
		boolean add(String item);
		boolean remove(Object item);
	}
	
	@Delegate(types=SimpleCollection.class)
	private final Collection<String> collection = new ArrayList<String>();
}


class ExcludesDelegateExample {
	long counter = 0L;
	
	private interface Add {
		boolean add(String x);
		boolean addAll(Collection<? extends String> x);
	}
	
	@Delegate(excludes=Add.class)
	private final Collection<String> collection = new ArrayList<String>();
	
	public boolean add(String item) {
		counter++;
		return collection.add(item);
	}
	
	public boolean addAll(Collection<? extends String> col) {
		counter += col.size();
		return collection.addAll(col);
	}
}