| <?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml" lang="en"><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/><link rel="stylesheet" href="../jacoco-resources/report.css" type="text/css"/><link rel="shortcut icon" href="../jacoco-resources/report.gif" type="image/gif"/><title>CollectionUtils.java</title><link rel="stylesheet" href="../jacoco-resources/prettify.css" type="text/css"/><script type="text/javascript" src="../jacoco-resources/prettify.js"></script></head><body onload="window['PR_TAB_WIDTH']=4;prettyPrint()"><div class="breadcrumb" id="breadcrumb"><span class="info"><a href="../jacoco-sessions.html" class="el_session">Sessions</a></span><a href="../index.html" class="el_report">Apache Shiro :: Core</a> > <a href="index.source.html" class="el_package">org.apache.shiro.util</a> > <span class="el_source">CollectionUtils.java</span></div><h1>CollectionUtils.java</h1><pre class="source lang-java linenums">/* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.shiro.util; |
| |
| import org.apache.shiro.subject.PrincipalCollection; |
| |
| import java.util.*; |
| |
| /** |
| * Static helper class for use dealing with Collections. |
| * |
| * @since 0.9 |
| */ |
| <span class="nc" id="L30">public class CollectionUtils {</span> |
| |
| //TODO - complete JavaDoc |
| |
| public static <E> Set<E> asSet(E... elements) { |
| <span class="pc bpc" id="L35" title="1 of 4 branches missed."> if (elements == null || elements.length == 0) {</span> |
| <span class="fc" id="L36"> return Collections.emptySet();</span> |
| } |
| |
| <span class="fc bfc" id="L39" title="All 2 branches covered."> if (elements.length == 1) {</span> |
| <span class="fc" id="L40"> return Collections.singleton(elements[0]);</span> |
| } |
| |
| <span class="fc" id="L43"> LinkedHashSet<E> set = new LinkedHashSet<E>(elements.length * 4 / 3 + 1);</span> |
| <span class="fc" id="L44"> Collections.addAll(set, elements);</span> |
| <span class="fc" id="L45"> return set;</span> |
| } |
| |
| /** |
| * Returns {@code true} if the specified {@code Collection} is {@code null} or {@link Collection#isEmpty empty}, |
| * {@code false} otherwise. |
| * |
| * @param c the collection to check |
| * @return {@code true} if the specified {@code Collection} is {@code null} or {@link Collection#isEmpty empty}, |
| * {@code false} otherwise. |
| * @since 1.0 |
| */ |
| public static boolean isEmpty(Collection c) { |
| <span class="fc bfc" id="L58" title="All 4 branches covered."> return c == null || c.isEmpty();</span> |
| } |
| |
| /** |
| * Returns {@code true} if the specified {@code Map} is {@code null} or {@link Map#isEmpty empty}, |
| * {@code false} otherwise. |
| * |
| * @param m the {@code Map} to check |
| * @return {@code true} if the specified {@code Map} is {@code null} or {@link Map#isEmpty empty}, |
| * {@code false} otherwise. |
| * @since 1.0 |
| */ |
| public static boolean isEmpty(Map m) { |
| <span class="fc bfc" id="L71" title="All 4 branches covered."> return m == null || m.isEmpty();</span> |
| } |
| |
| /** |
| * Returns the size of the specified collection or {@code 0} if the collection is {@code null}. |
| * |
| * @param c the collection to check |
| * @return the size of the specified collection or {@code 0} if the collection is {@code null}. |
| * @since 1.2 |
| */ |
| public static int size(Collection c) { |
| <span class="nc bnc" id="L82" title="All 2 branches missed."> return c != null ? c.size() : 0;</span> |
| } |
| |
| /** |
| * Returns the size of the specified map or {@code 0} if the map is {@code null}. |
| * |
| * @param m the map to check |
| * @return the size of the specified map or {@code 0} if the map is {@code null}. |
| * @since 1.2 |
| */ |
| public static int size(Map m) { |
| <span class="nc bnc" id="L93" title="All 2 branches missed."> return m != null ? m.size() : 0;</span> |
| } |
| |
| |
| /** |
| * Returns {@code true} if the specified {@code PrincipalCollection} is {@code null} or |
| * {@link PrincipalCollection#isEmpty empty}, {@code false} otherwise. |
| * |
| * @param principals the principals to check. |
| * @return {@code true} if the specified {@code PrincipalCollection} is {@code null} or |
| * {@link PrincipalCollection#isEmpty empty}, {@code false} otherwise. |
| * @since 1.0 |
| */ |
| public static boolean isEmpty(PrincipalCollection principals) { |
| <span class="pc bpc" id="L107" title="1 of 4 branches missed."> return principals == null || principals.isEmpty();</span> |
| } |
| |
| public static <E> List<E> asList(E... elements) { |
| <span class="pc bpc" id="L111" title="2 of 4 branches missed."> if (elements == null || elements.length == 0) {</span> |
| <span class="nc" id="L112"> return Collections.emptyList();</span> |
| } |
| |
| // Integer overflow does not occur when a large array is passed in because the list array already exists |
| <span class="fc" id="L116"> return Arrays.asList(elements);</span> |
| } |
| |
| /*public static <E> Deque<E> asDeque(E... elements) { |
| if (elements == null || elements.length == 0) { |
| return new ArrayDeque<E>(); |
| } |
| // Avoid integer overflow when a large array is passed in |
| int capacity = computeListCapacity(elements.length); |
| ArrayDeque<E> deque = new ArrayDeque<E>(capacity); |
| Collections.addAll(deque, elements); |
| return deque; |
| }*/ |
| |
| static int computeListCapacity(int arraySize) { |
| <span class="nc" id="L131"> return (int) Math.min(5L + arraySize + (arraySize / 10), Integer.MAX_VALUE);</span> |
| } |
| } |
| </pre><div class="footer"><span class="right">Created with <a href="http://www.eclemma.org/jacoco">JaCoCo</a> 0.7.7.201606060606</span></div></body></html> |
