/* * Copyright 2014, Simon Matić Langford * Copyright 2014, The Sporting Exchange Limited * * 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 com.betfair.cougar.core.api.builder; import java.util.*; import java.util.concurrent.ConcurrentSkipListSet; import java.util.concurrent.CopyOnWriteArraySet; /** * Builder implementation for sets. Initial set by default is a HashSet, but this can * be changed using the toXXX() methods. */ public class SetBuilder<T> implements Builder<Set<T>> { private Set<T> ret; private boolean seal = true; public SetBuilder() { ret = new HashSet<>(); } public SetBuilder(Set<T> set) { ret = set; } public SetBuilder<T> add(Builder<T> value) { add(value.build()); return this; } public SetBuilder<T> add(T value) { ret.add(value); return this; } public SetBuilder<T> leaveModifiable() { seal = false; return this; } @Override public Set<T> build() { if (seal) { ret = Collections.unmodifiableSet(ret); } return ret; } public SetBuilder<T> toLinkedHashSet() { ret = new LinkedHashSet<>(ret); return this; } public SetBuilder<T> toConcurrentSkipListSet() { ret = new ConcurrentSkipListSet<>(ret); return this; } public SetBuilder<T> toCopyOnWriteArraySet() { ret = new CopyOnWriteArraySet<>(ret); return this; } }