001 /* 002 * Created on Feb 6, 2011 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with 005 * the License. You may obtain a copy of the License at 006 * 007 * http://www.apache.org/licenses/LICENSE-2.0 008 * 009 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on 010 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the 011 * specific language governing permissions and limitations under the License. 012 * 013 * Copyright @2011 the original author or authors. 014 */ 015 package org.fest.assertions.condition; 016 017 import static java.util.Collections.unmodifiableCollection; 018 019 import java.util.*; 020 021 import org.fest.assertions.core.Condition; 022 import org.fest.util.VisibleForTesting; 023 024 /** 025 * Join of two or more <code>{@link Condition}</code>s. 026 * @param <T> the type of object this condition accepts. 027 * 028 * @author Yvonne Wang 029 * @author Mikhail Mazursky 030 */ 031 public abstract class Join<T> extends Condition<T> { 032 033 @VisibleForTesting final Collection<Condition<? super T>> conditions; 034 035 /** 036 * Creates a new </code>{@link Join}</code>. 037 * @param conditions the conditions to join. 038 * @throws NullPointerException if the given array is {@code null}. 039 * @throws NullPointerException if any of the elements in the given array is {@code null}. 040 */ 041 protected Join(Condition<? super T>...conditions) { 042 if (conditions == null) throw conditionsIsNull(); 043 this.conditions = new ArrayList<Condition<? super T>>(); 044 for (Condition<? super T> condition : conditions) this.conditions.add(notNull(condition)); 045 } 046 047 /** 048 * Creates a new </code>{@link Join}</code>. 049 * @param conditions the conditions to join. 050 * @throws NullPointerException if the given iterable is {@code null}. 051 * @throws NullPointerException if any of the elements in the given iterable is {@code null}. 052 */ 053 protected Join(Iterable<? extends Condition<? super T>> conditions) { 054 if (conditions == null) throw conditionsIsNull(); 055 this.conditions = new ArrayList<Condition<? super T>>(); 056 for (Condition<? super T> condition : conditions) this.conditions.add(notNull(condition)); 057 } 058 059 private static NullPointerException conditionsIsNull() { 060 return new NullPointerException("The given conditions should not be null"); 061 } 062 063 private static <T> Condition<T> notNull(Condition<T> condition) { 064 if (condition == null) throw new NullPointerException("The given conditions should not have null entries"); 065 return condition; 066 } 067 068 /** 069 * Returns the conditions to join. 070 * @return the conditions to join. 071 */ 072 protected final Collection<Condition<? super T>> conditions() { 073 return unmodifiableCollection(conditions); 074 } 075 }