defaultentry.html
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<!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>DefaultEntry 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"> DefaultEntry</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 September 12, 2006</em><a name="4" href="#4">4</a> <em class="comment">*</em><a name="5" href="#5">5</a> <em class="comment">* Copyright (C) 2006 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/util/ms/package-summary.html">org.archive.util.ms</a>;<a name="24" href="#24">24</a> <a name="25" href="#25">25</a> <strong>import</strong> java.io.IOException;<a name="26" href="#26">26</a> <strong>import</strong> java.nio.ByteBuffer;<a name="27" href="#27">27</a> <strong>import</strong> java.nio.ByteOrder;<a name="28" href="#28">28</a> <strong>import</strong> java.util.ArrayList;<a name="29" href="#29">29</a> <strong>import</strong> java.util.List;<a name="30" href="#30">30</a> <a name="31" href="#31">31</a> <strong>import</strong> org.archive.util.IoUtils;<a name="32" href="#32">32</a> <strong>import</strong> org.archive.io.SeekInputStream;<a name="33" href="#33">33</a> <a name="34" href="#34">34</a> <strong>class</strong> <a href="../../../../org/archive/util/ms/DefaultEntry.html">DefaultEntry</a> implements <a href="../../../../org/archive/util/ms/Entry.html">Entry</a> {<a name="35" href="#35">35</a> <a name="36" href="#36">36</a> <a name="37" href="#37">37</a> <strong>private</strong> <a href="../../../../org/archive/util/ms/DefaultBlockFileSystem.html">DefaultBlockFileSystem</a> origin;<a name="38" href="#38">38</a> <strong>private</strong> String name;<a name="39" href="#39">39</a> <strong>private</strong> EntryType type;<a name="40" href="#40">40</a> <strong>private</strong> <strong>int</strong> previous;<a name="41" href="#41">41</a> <strong>private</strong> <strong>int</strong> next;<a name="42" href="#42">42</a> <strong>private</strong> <strong>int</strong> child;<a name="43" href="#43">43</a> <strong>private</strong> <strong>int</strong> startBlock;<a name="44" href="#44">44</a> <strong>private</strong> <strong>int</strong> size;<a name="45" href="#45">45</a> <strong>private</strong> <strong>int</strong> index;<a name="46" href="#46">46</a> <a name="47" href="#47">47</a> <a name="48" href="#48">48</a> <strong>public</strong> <a href="../../../../org/archive/util/ms/DefaultEntry.html">DefaultEntry</a>(<a href="../../../../org/archive/util/ms/DefaultBlockFileSystem.html">DefaultBlockFileSystem</a> origin, <a href="../../../../org/archive/io/SeekInputStream.html">SeekInputStream</a> input, <strong>int</strong> index) <a name="49" href="#49">49</a> throws IOException {<a name="50" href="#50">50</a> <strong>this</strong>.index = index;<a name="51" href="#51">51</a> <em class="comment">// FIXME: Read directly from the stream</em><a name="52" href="#52">52</a> <strong>this</strong>.origin = origin;<a name="53" href="#53">53</a> byte[] temp = <strong>new</strong> byte[128];<a name="54" href="#54">54</a> IoUtils.readFully(input, temp);<a name="55" href="#55">55</a> ByteBuffer buf = ByteBuffer.wrap(temp);<a name="56" href="#56">56</a> buf.order(ByteOrder.LITTLE_ENDIAN);<a name="57" href="#57">57</a> buf.position(0);<a name="58" href="#58">58</a> <a name="59" href="#59">59</a> StringBuilder nameBuf = <strong>new</strong> StringBuilder();<a name="60" href="#60">60</a> <a name="61" href="#61">61</a> <strong>char</strong> ch = buf.getChar();<a name="62" href="#62">62</a> <strong>while</strong> (ch != 0) {<a name="63" href="#63">63</a> nameBuf.append(ch);<a name="64" href="#64">64</a> ch = buf.getChar();<a name="65" href="#65">65</a> }<a name="66" href="#66">66</a> <strong>this</strong>.name = nameBuf.toString();<a name="67" href="#67">67</a> <a name="68" href="#68">68</a> byte typeFlag = buf.get(0x42);<a name="69" href="#69">69</a> <strong>switch</strong> (typeFlag) {<a name="70" href="#70">70</a> <strong>case</strong> 1:<a name="71" href="#71">71</a> <strong>this</strong>.type = EntryType.DIRECTORY;<a name="72" href="#72">72</a> <strong>break</strong>;<a name="73" href="#73">73</a> <strong>case</strong> 2:<a name="74" href="#74">74</a> <strong>this</strong>.type = EntryType.FILE;<a name="75" href="#75">75</a> <strong>break</strong>;<a name="76" href="#76">76</a> <strong>case</strong> 5:<a name="77" href="#77">77</a> <strong>this</strong>.type = EntryType.ROOT;<a name="78" href="#78">78</a> <strong>break</strong>;<a name="79" href="#79">79</a> <strong>default</strong>:<a name="80" href="#80">80</a> <strong>throw</strong> <strong>new</strong> IllegalStateException(<span class="string">"Invalid type: "</span> + typeFlag);<a name="81" href="#81">81</a> }<a name="82" href="#82">82</a> <a name="83" href="#83">83</a> <strong>this</strong>.previous = buf.getInt(0x44);<a name="84" href="#84">84</a> <strong>this</strong>.next = buf.getInt(0x48);<a name="85" href="#85">85</a> <strong>this</strong>.child = buf.getInt(0x4C);<a name="86" href="#86">86</a> <strong>this</strong>.startBlock = buf.getInt(0x74);<a name="87" href="#87">87</a> <strong>this</strong>.size = buf.getInt(0x78);<a name="88" href="#88">88</a> }<a name="89" href="#89">89</a> <a name="90" href="#90">90</a> <a name="91" href="#91">91</a> <strong>public</strong> String getName() {<a name="92" href="#92">92</a> <strong>return</strong> name;<a name="93" href="#93">93</a> }<a name="94" href="#94">94</a> <a name="95" href="#95">95</a> <a name="96" href="#96">96</a> <strong>public</strong> EntryType getType() {<a name="97" href="#97">97</a> <strong>return</strong> type;<a name="98" href="#98">98</a> }<a name="99" href="#99">99</a> <a name="100" href="#100">100</a> <a name="101" href="#101">101</a> <strong>public</strong> <a href="../../../../org/archive/util/ms/Entry.html">Entry</a> getNext() throws IOException {<a name="102" href="#102">102</a> <strong>return</strong> origin.getEntry(next);<a name="103" href="#103">103</a> }<a name="104" href="#104">104</a> <a name="105" href="#105">105</a> <a name="106" href="#106">106</a> <strong>public</strong> <a href="../../../../org/archive/util/ms/Entry.html">Entry</a> getPrevious() throws IOException {<a name="107" href="#107">107</a> <strong>return</strong> origin.getEntry(previous);<a name="108" href="#108">108</a> }<a name="109" href="#109">109</a> <a name="110" href="#110">110</a> <a name="111" href="#111">111</a> <strong>public</strong> <a href="../../../../org/archive/util/ms/Entry.html">Entry</a> getChild() throws IOException {<a name="112" href="#112">112</a> <strong>return</strong> origin.getEntry(child);<a name="113" href="#113">113</a> }<a name="114" href="#114">114</a> <a name="115" href="#115">115</a> <strong>public</strong> <a href="../../../../org/archive/io/SeekInputStream.html">SeekInputStream</a> open() throws IOException {<a name="116" href="#116">116</a> <strong>return</strong> <strong>new</strong> <a href="../../../../org/archive/util/ms/BlockInputStream.html">BlockInputStream</a>(origin, startBlock);<a name="117" href="#117">117</a> }<a name="118" href="#118">118</a> <a name="119" href="#119">119</a> <a name="120" href="#120">120</a> <strong>public</strong> List<Entry> list() throws IOException {<a name="121" href="#121">121</a> <strong>if</strong> (child < 0) {<a name="122" href="#122">122</a> <strong>throw</strong> <strong>new</strong> IllegalStateException(<span class="string">"Can't list non-directory."</span>);<a name="123" href="#123">123</a> }<a name="124" href="#124">124</a> <a href="../../../../org/archive/util/ms/Entry.html">Entry</a> child = getChild();<a name="125" href="#125">125</a> ArrayList<Entry> r = <strong>new</strong> ArrayList<Entry>();<a name="126" href="#126">126</a> list(r, child);<a name="127" href="#127">127</a> <strong>return</strong> r;<a name="128" href="#128">128</a> }<a name="129" href="#129">129</a> <a name="130" href="#130">130</a> <a name="131" href="#131">131</a> <strong>public</strong> <strong>static</strong> <strong>void</strong> list(List<Entry> list, <a href="../../../../org/archive/util/ms/Entry.html">Entry</a> e) throws IOException {<a name="132" href="#132">132</a> <strong>if</strong> (e == <strong>null</strong>) {<a name="133" href="#133">133</a> <strong>return</strong>;<a name="134" href="#134">134</a> }<a name="135" href="#135">135</a> list.add(e);<a name="136" href="#136">136</a> list(list, e.getPrevious());<a name="137" href="#137">137</a> list(list, e.getNext());<a name="138" href="#138">138</a> }<a name="139" href="#139">139</a> <a name="140" href="#140">140</a> <a name="141" href="#141">141</a> <strong>public</strong> <strong>int</strong> getIndex() {<a name="142" href="#142">142</a> <strong>return</strong> index;<a name="143" href="#143">143</a> }<a name="144" href="#144">144</a> <a name="145" href="#145">145</a> <a name="146" href="#146">146</a> <strong>public</strong> String toString() {<a name="147" href="#147">147</a> StringBuilder result = <strong>new</strong> StringBuilder(<span class="string">"Entry{"</span>);<a name="148" href="#148">148</a> result.append(<span class="string">"name="</span>).append(name);<a name="149" href="#149">149</a> result.append(<span class="string">" index="</span>).append(index);<a name="150" href="#150">150</a> result.append(<span class="string">" type="</span>).append(type);<a name="151" href="#151">151</a> result.append(<span class="string">" size="</span>).append(size);<a name="152" href="#152">152</a> result.append(<span class="string">" prev="</span>).append(previous);<a name="153" href="#153">153</a> result.append(<span class="string">" next="</span>).append(next);<a name="154" href="#154">154</a> result.append(<span class="string">" child="</span>).append(child);<a name="155" href="#155">155</a> result.append(<span class="string">" startBlock="</span>).append(startBlock);<a name="156" href="#156">156</a> result.append(<span class="string">"}"</span>);<a name="157" href="#157">157</a> <strong>return</strong> result.toString();<a name="158" href="#158">158</a> }<a name="159" href="#159">159</a> <a name="160" href="#160">160</a> <a name="161" href="#161">161</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
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