📄 gzippedinputstreamtest.html
字号:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head><meta http-equiv="content-type" content="text/html; charset=ISO-8859-1" /><title>GzippedInputStreamTest xref</title><link type="text/css" rel="stylesheet" href="../../../stylesheet.css" /></head><body><pre><a name="1" href="#1">1</a> <em class="comment">/*<em class="comment"> GzippedInputStreamTest</em></em><a name="2" href="#2">2</a> <em class="comment"> * </em><a name="3" href="#3">3</a> <em class="comment"> * Created on May 4, 2005</em><a name="4" href="#4">4</a> <em class="comment"> *</em><a name="5" href="#5">5</a> <em class="comment"> * Copyright (C) 2005 Internet Archive.</em><a name="6" href="#6">6</a> <em class="comment"> * </em><a name="7" href="#7">7</a> <em class="comment"> * This file is part of the Heritrix web crawler (crawler.archive.org).</em><a name="8" href="#8">8</a> <em class="comment"> * </em><a name="9" href="#9">9</a> <em class="comment"> * Heritrix is free software; you can redistribute it and/or modify</em><a name="10" href="#10">10</a> <em class="comment"> * it under the terms of the GNU Lesser Public License as published by</em><a name="11" href="#11">11</a> <em class="comment"> * the Free Software Foundation; either version 2.1 of the License, or</em><a name="12" href="#12">12</a> <em class="comment"> * any later version.</em><a name="13" href="#13">13</a> <em class="comment"> * </em><a name="14" href="#14">14</a> <em class="comment"> * Heritrix is distributed in the hope that it will be useful, </em><a name="15" href="#15">15</a> <em class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</em><a name="16" href="#16">16</a> <em class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</em><a name="17" href="#17">17</a> <em class="comment"> * GNU Lesser Public License for more details.</em><a name="18" href="#18">18</a> <em class="comment"> * </em><a name="19" href="#19">19</a> <em class="comment"> * You should have received a copy of the GNU Lesser Public License</em><a name="20" href="#20">20</a> <em class="comment"> * along with Heritrix; if not, write to the Free Software</em><a name="21" href="#21">21</a> <em class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</em><a name="22" href="#22">22</a> <em class="comment"> */</em><a name="23" href="#23">23</a> <strong>package</strong> <a href="../../../org/archive/io/package-summary.html">org.archive.io</a>;<a name="24" href="#24">24</a> <a name="25" href="#25">25</a> <strong>import</strong> it.unimi.dsi.fastutil.io.RepositionableStream;<a name="26" href="#26">26</a> <a name="27" href="#27">27</a> <strong>import</strong> java.io.BufferedOutputStream;<a name="28" href="#28">28</a> <strong>import</strong> java.io.ByteArrayInputStream;<a name="29" href="#29">29</a> <strong>import</strong> java.io.File;<a name="30" href="#30">30</a> <strong>import</strong> java.io.FileOutputStream;<a name="31" href="#31">31</a> <strong>import</strong> java.io.IOException;<a name="32" href="#32">32</a> <strong>import</strong> java.io.InputStream;<a name="33" href="#33">33</a> <strong>import</strong> java.io.OutputStream;<a name="34" href="#34">34</a> <strong>import</strong> java.util.Iterator;<a name="35" href="#35">35</a> <a name="36" href="#36">36</a> <strong>import</strong> org.archive.util.TmpDirTestCase;<a name="37" href="#37">37</a> <a name="38" href="#38">38</a> <em>/**<em>*</em></em><a name="39" href="#39">39</a> <em> * @author stack</em><a name="40" href="#40">40</a> <em> * @version $Date: 2006/08/04 00:13:51 $, $Revision: 1.5 $</em><a name="41" href="#41">41</a> <em> */</em><a name="42" href="#42">42</a> <strong>public</strong> <strong>class</strong> <a href="../../../org/archive/io/GzippedInputStreamTest.html">GzippedInputStreamTest</a> <strong>extends</strong> <a href="../../../org/archive/util/TmpDirTestCase.html">TmpDirTestCase</a> {<a name="43" href="#43">43</a> <em>/**<em>*</em></em><a name="44" href="#44">44</a> <em> * Number of records in gzip member file.</em><a name="45" href="#45">45</a> <em> */</em><a name="46" href="#46">46</a> <strong>final</strong> <strong>static</strong> <strong>int</strong> GZIPMEMBER_COUNT = 4;<a name="47" href="#47">47</a> <strong>final</strong> <strong>static</strong> String TEXT = <span class="string">"Some old text to compress."</span>;<a name="48" href="#48">48</a> <em class="comment">// Create file to use in tests below.</em><a name="49" href="#49">49</a> <strong>private</strong> File compressedFile = <strong>null</strong>;<a name="50" href="#50">50</a> <a name="51" href="#51">51</a> <strong>protected</strong> <strong>void</strong> setUp() throws Exception {<a name="52" href="#52">52</a> <strong>super</strong>.setUp();<a name="53" href="#53">53</a> <strong>this</strong>.compressedFile = createMultiGzipMembers();<a name="54" href="#54">54</a> }<a name="55" href="#55">55</a> <a name="56" href="#56">56</a> <strong>protected</strong> <strong>void</strong> tearDown() throws Exception {<a name="57" href="#57">57</a> <strong>if</strong> (<strong>this</strong>.compressedFile != <strong>null</strong>) {<a name="58" href="#58">58</a> <strong>this</strong>.compressedFile.delete();<a name="59" href="#59">59</a> }<a name="60" href="#60">60</a> <strong>super</strong>.tearDown();<a name="61" href="#61">61</a> }<a name="62" href="#62">62</a> <a name="63" href="#63">63</a> <strong>public</strong> <strong>static</strong> <strong>void</strong> main(String [] args) {<a name="64" href="#64">64</a> junit.textui.TestRunner.run(GzippedInputStreamTest.<strong>class</strong>);<a name="65" href="#65">65</a> }<a name="66" href="#66">66</a> <a name="67" href="#67">67</a> <strong>protected</strong> <strong>class</strong> RepositionableRandomAccessInputStream<a name="68" href="#68">68</a> <strong>extends</strong> <a href="../../../org/archive/io/RandomAccessInputStream.html">RandomAccessInputStream</a><a name="69" href="#69">69</a> implements RepositionableStream {<a name="70" href="#70">70</a> <strong>public</strong> RepositionableRandomAccessInputStream(<strong>final</strong> File file)<a name="71" href="#71">71</a> throws IOException {<a name="72" href="#72">72</a> <strong>super</strong>(file);<a name="73" href="#73">73</a> }<a name="74" href="#74">74</a> <a name="75" href="#75">75</a> <strong>public</strong> RepositionableRandomAccessInputStream(<strong>final</strong> File file,<a name="76" href="#76">76</a> <strong>final</strong> <strong>long</strong> offset)<a name="77" href="#77">77</a> throws IOException {<a name="78" href="#78">78</a> <strong>super</strong>(file, offset);<a name="79" href="#79">79</a> }<a name="80" href="#80">80</a> }<a name="81" href="#81">81</a> <a name="82" href="#82">82</a> <strong>protected</strong> File createMultiGzipMembers() throws IOException {<a name="83" href="#83">83</a> <strong>final</strong> File f =<a name="84" href="#84">84</a> <strong>new</strong> File(getTmpDir(), <strong>this</strong>.getClass().getName() + <span class="string">".gz"</span>);<a name="85" href="#85">85</a> OutputStream os = <strong>new</strong> BufferedOutputStream(<strong>new</strong> FileOutputStream(f));<a name="86" href="#86">86</a> <strong>for</strong> (<strong>int</strong> i = 0; i < GZIPMEMBER_COUNT; i++) {<a name="87" href="#87">87</a> os.write(GzippedInputStream.gzip(TEXT.getBytes()));<a name="88" href="#88">88</a> }<a name="89" href="#89">89</a> os.close();<a name="90" href="#90">90</a> <strong>return</strong> f;<a name="91" href="#91">91</a> }<a name="92" href="#92">92</a> <a name="93" href="#93">93</a> <strong>public</strong> <strong>void</strong> testCountOfMembers()<a name="94" href="#94">94</a> throws IOException {<a name="95" href="#95">95</a> InputStream is =<a name="96" href="#96">96</a> <strong>new</strong> RepositionableRandomAccessInputStream(<strong>this</strong>.compressedFile);<a name="97" href="#97">97</a> <a href="../../../org/archive/io/GzippedInputStream.html">GzippedInputStream</a> gis = <strong>new</strong> <a href="../../../org/archive/io/GzippedInputStream.html">GzippedInputStream</a>(is);<a name="98" href="#98">98</a> <strong>int</strong> records = 0;<a name="99" href="#99">99</a> <em class="comment">// Get offset of second record. Will use it later in tests below.</em><a name="100" href="#100">100</a> <strong>long</strong> offsetOfSecondRecord = -1;<a name="101" href="#101">101</a> <strong>for</strong> (Iterator i = gis.iterator(); i.hasNext();) {<a name="102" href="#102">102</a> <strong>long</strong> offset = gis.position();<a name="103" href="#103">103</a> <strong>if</strong> (records == 1) {<a name="104" href="#104">104</a> offsetOfSecondRecord = offset;<a name="105" href="#105">105</a> }<a name="106" href="#106">106</a> is = (InputStream)i.next();<a name="107" href="#107">107</a> records++;<a name="108" href="#108">108</a> }<a name="109" href="#109">109</a> assertTrue(<span class="string">"Record count is off "</span> + records,<a name="110" href="#110">110</a> records == GZIPMEMBER_COUNT);<a name="111" href="#111">111</a> gis.close();<a name="112" href="#112">112</a> <a name="113" href="#113">113</a> <em class="comment">// Test random record read.</em><a name="114" href="#114">114</a> is = <strong>new</strong> RepositionableRandomAccessInputStream(<strong>this</strong>.compressedFile);<a name="115" href="#115">115</a> gis = <strong>new</strong> <a href="../../../org/archive/io/GzippedInputStream.html">GzippedInputStream</a>(is);<a name="116" href="#116">116</a> byte [] buffer = <strong>new</strong> byte[TEXT.length()];<a name="117" href="#117">117</a> <em class="comment">// Seek to second record, read in gzip header.</em><a name="118" href="#118">118</a> gis.gzipMemberSeek(offsetOfSecondRecord);<a name="119" href="#119">119</a> gis.read(buffer);<a name="120" href="#120">120</a> String readString = <strong>new</strong> String(buffer);<a name="121" href="#121">121</a> assertEquals(<span class="string">"Failed read"</span>, TEXT, readString);<a name="122" href="#122">122</a> gis.close();<a name="123" href="#123">123</a> <a name="124" href="#124">124</a> <em class="comment">// Test the count we get makes sense after iterating through</em><a name="125" href="#125">125</a> <em class="comment">// starting at second record.</em><a name="126" href="#126">126</a> is = <strong>new</strong> RepositionableRandomAccessInputStream(<strong>this</strong>.compressedFile,<a name="127" href="#127">127</a> offsetOfSecondRecord);<a name="128" href="#128">128</a> gis = <strong>new</strong> <a href="../../../org/archive/io/GzippedInputStream.html">GzippedInputStream</a>(is);<a name="129" href="#129">129</a> records = 0;<a name="130" href="#130">130</a> <strong>for</strong> (<strong>final</strong> Iterator i = gis.iterator(); i.hasNext(); i.next()) {<a name="131" href="#131">131</a> records++;<a name="132" href="#132">132</a> }<a name="133" href="#133">133</a> assertEquals(records,<a name="134" href="#134">134</a> GZIPMEMBER_COUNT - 1 <em class="comment">/*<em class="comment">We started at 2nd record*/</em>);</em><a name="135" href="#135">135</a> gis.close();<a name="136" href="#136">136</a> }<a name="137" href="#137">137</a> <a name="138" href="#138">138</a> <strong>public</strong> <strong>void</strong> testCompressedStream() throws IOException {<a name="139" href="#139">139</a> byte [] bytes = <span class="string">"test"</span>.getBytes();<a name="140" href="#140">140</a> ByteArrayInputStream baos = <strong>new</strong> ByteArrayInputStream(bytes);<a name="141" href="#141">141</a> assertFalse(GzippedInputStream.isCompressedStream(baos));<a name="142" href="#142">142</a> <a name="143" href="#143">143</a> byte [] gzippedMetaData = GzippedInputStream.gzip(bytes);<a name="144" href="#144">144</a> baos = <strong>new</strong> ByteArrayInputStream(gzippedMetaData);<a name="145" href="#145">145</a> assertTrue(GzippedInputStream.isCompressedStream(baos));<a name="146" href="#146">146</a> <a name="147" href="#147">147</a> gzippedMetaData = GzippedInputStream.gzip(bytes);<a name="148" href="#148">148</a> <strong>final</strong> RepositionableByteArrayInputStream rbaos =<a name="149" href="#149">149</a> <strong>new</strong> RepositionableByteArrayInputStream(gzippedMetaData);<a name="150" href="#150">150</a> <strong>final</strong> <strong>int</strong> totalBytes = gzippedMetaData.length;<a name="151" href="#151">151</a> assertTrue(GzippedInputStream.isCompressedRepositionableStream(rbaos));<a name="152" href="#152">152</a> <strong>long</strong> available = rbaos.available();<a name="153" href="#153">153</a> assertEquals(available, totalBytes);<a name="154" href="#154">154</a> assertEquals(rbaos.position(), 0);<a name="155" href="#155">155</a> }<a name="156" href="#156">156</a> <a name="157" href="#157">157</a> <strong>private</strong> <strong>class</strong> RepositionableByteArrayInputStream<a name="158" href="#158">158</a> <strong>extends</strong> ByteArrayInputStream implements RepositionableStream {<a name="159" href="#159">159</a> <strong>public</strong> RepositionableByteArrayInputStream(<strong>final</strong> byte [] bytes) {<a name="160" href="#160">160</a> <strong>super</strong>(bytes);<a name="161" href="#161">161</a> }<a name="162" href="#162">162</a> <a name="163" href="#163">163</a> <strong>public</strong> <strong>void</strong> position(<strong>long</strong> p) {<a name="164" href="#164">164</a> <strong>this</strong>.pos = (<strong>int</strong>)p;<a name="165" href="#165">165</a> }<a name="166" href="#166">166</a> <strong>public</strong> <strong>long</strong> position() {<a name="167" href="#167">167</a> <strong>return</strong> <strong>this</strong>.pos;<a name="168" href="#168">168</a> }<a name="169" href="#169">169</a> }<a name="170" href="#170">170</a> }</pre><hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -