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| <div class="title">HdfsCompression.java</div> </div> |
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| <a href="HdfsCompression_8java.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright (c) 2012 Cloudera, Inc. All rights reserved.</span></div> |
| <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="keyword">package </span>com.cloudera.impala.catalog;</div> |
| <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> </div> |
| <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="keyword">import</span> com.cloudera.impala.thrift.THdfsCompression;</div> |
| <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="keyword">import</span> com.google.common.base.Preconditions;</div> |
| <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="keyword">import</span> com.google.common.collect.ImmutableMap;</div> |
| <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> </div> |
| <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment">// TODO: Add LZ4?</span></div> |
| <div class="line"><a name="l00016"></a><span class="lineno"><a class="line" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html"> 16</a></span> <span class="keyword">public</span> <span class="keyword">enum</span> <a class="code" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html">HdfsCompression</a> {</div> |
| <div class="line"><a name="l00017"></a><span class="lineno"><a class="line" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#a3f309676b74c490036d0ac83935601c0"> 17</a></span>  <a class="code" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#a3f309676b74c490036d0ac83935601c0">NONE</a>,</div> |
| <div class="line"><a name="l00018"></a><span class="lineno"><a class="line" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#a2abedba210737919b074a61d584cfcb0"> 18</a></span>  <a class="code" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#a2abedba210737919b074a61d584cfcb0">DEFLATE</a>,</div> |
| <div class="line"><a name="l00019"></a><span class="lineno"><a class="line" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#ad88f45684b5e64f059e6f31f9ce0005a"> 19</a></span>  <a class="code" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#ad88f45684b5e64f059e6f31f9ce0005a">GZIP</a>,</div> |
| <div class="line"><a name="l00020"></a><span class="lineno"><a class="line" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#ab35b4f724240bcd60e60b61add16cbc3"> 20</a></span>  <a class="code" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#ab35b4f724240bcd60e60b61add16cbc3">BZIP2</a>,</div> |
| <div class="line"><a name="l00021"></a><span class="lineno"><a class="line" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#ac7c191b73d59d5e9ef46e55b9e5f4b66"> 21</a></span>  <a class="code" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#ac7c191b73d59d5e9ef46e55b9e5f4b66">SNAPPY</a>,</div> |
| <div class="line"><a name="l00022"></a><span class="lineno"><a class="line" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#af27215baeda610fdf54aa390e55b14ef"> 22</a></span>  <a class="code" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#af27215baeda610fdf54aa390e55b14ef">LZO</a>,</div> |
| <div class="line"><a name="l00023"></a><span class="lineno"><a class="line" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#a318e47e6a431d5dbb10534b5a464d35a"> 23</a></span>  <a class="code" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#a318e47e6a431d5dbb10534b5a464d35a">LZO_INDEX</a>; <span class="comment">//Lzo index file.</span></div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  <span class="comment">/* Map from a suffix to a compression type */</span></div> |
| <div class="line"><a name="l00026"></a><span class="lineno"><a class="line" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#ab35e61d94c0d74a474b24003108b9e6d"> 26</a></span>  <span class="keyword">private</span> <span class="keyword">static</span> <span class="keyword">final</span> ImmutableMap<String, HdfsCompression> SUFFIX_MAP =</div> |
| <div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  ImmutableMap.<String, <a class="code" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html">HdfsCompression</a>>builder().</div> |
| <div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  put(<span class="stringliteral">"deflate"</span>, DEFLATE).</div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  put(<span class="stringliteral">"gz"</span>, GZIP).</div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  put(<span class="stringliteral">"bz2"</span>, BZIP2).</div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  put(<span class="stringliteral">"snappy"</span>, SNAPPY).</div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  put(<span class="stringliteral">"lzo"</span>, LZO).</div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  put(<span class="stringliteral">"index"</span>, LZO_INDEX).</div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  build();</div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="comment">/* Given a file name return its compression type, if any. */</span></div> |
| <div class="line"><a name="l00037"></a><span class="lineno"><a class="line" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#a588dd70d035b24ebae1ae8bf131ccadb"> 37</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> <a class="code" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html">HdfsCompression</a> <a class="code" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#a588dd70d035b24ebae1ae8bf131ccadb">fromFileName</a>(String fileName) {</div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordtype">int</span> index = fileName.lastIndexOf(<span class="stringliteral">"."</span>);</div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keywordflow">if</span> (index == -1) {</div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="keywordflow">return</span> NONE;</div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  }</div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  String suffix = fileName.substring(index + 1);</div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <a class="code" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html">HdfsCompression</a> compression = SUFFIX_MAP.get(suffix.toLowerCase());</div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordflow">return</span> compression == null ? NONE : compression;</div> |
| <div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  }</div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span> </div> |
| <div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#a0a3ec1569de126ae2efd01374198f5c8"> 48</a></span>  <span class="keyword">public</span> THdfsCompression <a class="code" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#a0a3ec1569de126ae2efd01374198f5c8">toThrift</a>() {</div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordflow">switch</span> (<span class="keyword">this</span>) {</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">case</span> NONE: <span class="keywordflow">return</span> THdfsCompression.NONE;</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordflow">case</span> DEFLATE: <span class="keywordflow">return</span> THdfsCompression.DEFLATE;</div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordflow">case</span> GZIP: <span class="keywordflow">return</span> THdfsCompression.GZIP;</div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">case</span> BZIP2: <span class="keywordflow">return</span> THdfsCompression.BZIP2;</div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">case</span> SNAPPY: <span class="keywordflow">return</span> THdfsCompression.SNAPPY_BLOCKED;</div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">case</span> LZO: <span class="keywordflow">return</span> THdfsCompression.LZO;</div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordflow">default</span>: <span class="keywordflow">throw</span> <span class="keyword">new</span> IllegalStateException(<span class="stringliteral">"Unexpected codec: "</span> + <span class="keyword">this</span>);</div> |
| <div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  }</div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  }</div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span> </div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="comment">/* Returns a compression type based on (Hive's) intput format. Special case for LZO. */</span></div> |
| <div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#a83a78613ca0eb6524f2fbbf7cf1f8771"> 61</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> <a class="code" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html">HdfsCompression</a> <a class="code" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#a83a78613ca0eb6524f2fbbf7cf1f8771">fromHdfsInputFormatClass</a>(String inputFormatClass) {</div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="comment">// TODO: Remove when we have the native LZO writer.</span></div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  Preconditions.checkNotNull(inputFormatClass);</div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">if</span> (inputFormatClass.equals(<a class="code" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsFileFormat.html">HdfsFileFormat</a>.<a class="code" href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsFileFormat.html#a10ed82638e48809b977122e2f755add6">LZO_TEXT_INPUT_FORMAT</a>)) {</div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">return</span> LZO;</div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  }</div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">return</span> NONE;</div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  }</div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span> }</div> |
| <div class="ttc" id="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression_html_a588dd70d035b24ebae1ae8bf131ccadb"><div class="ttname"><a href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#a588dd70d035b24ebae1ae8bf131ccadb">com.cloudera.impala.catalog.HdfsCompression.fromFileName</a></div><div class="ttdeci">static HdfsCompression fromFileName(String fileName)</div><div class="ttdef"><b>Definition:</b> <a href="HdfsCompression_8java_source.html#l00037">HdfsCompression.java:37</a></div></div> |
| <div class="ttc" id="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression_html_af27215baeda610fdf54aa390e55b14ef"><div class="ttname"><a href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#af27215baeda610fdf54aa390e55b14ef">com.cloudera.impala.catalog.HdfsCompression.LZO</a></div><div class="ttdeci">LZO</div><div class="ttdef"><b>Definition:</b> <a href="HdfsCompression_8java_source.html#l00022">HdfsCompression.java:22</a></div></div> |
| <div class="ttc" id="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression_html_ac7c191b73d59d5e9ef46e55b9e5f4b66"><div class="ttname"><a href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#ac7c191b73d59d5e9ef46e55b9e5f4b66">com.cloudera.impala.catalog.HdfsCompression.SNAPPY</a></div><div class="ttdeci">SNAPPY</div><div class="ttdef"><b>Definition:</b> <a href="HdfsCompression_8java_source.html#l00021">HdfsCompression.java:21</a></div></div> |
| <div class="ttc" id="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsFileFormat_html_a10ed82638e48809b977122e2f755add6"><div class="ttname"><a href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsFileFormat.html#a10ed82638e48809b977122e2f755add6">com.cloudera.impala.catalog.HdfsFileFormat.LZO_TEXT_INPUT_FORMAT</a></div><div class="ttdeci">staticfinal String LZO_TEXT_INPUT_FORMAT</div><div class="ttdef"><b>Definition:</b> <a href="HdfsFileFormat_8java_source.html#l00042">HdfsFileFormat.java:42</a></div></div> |
| <div class="ttc" id="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression_html_a3f309676b74c490036d0ac83935601c0"><div class="ttname"><a href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#a3f309676b74c490036d0ac83935601c0">com.cloudera.impala.catalog.HdfsCompression.NONE</a></div><div class="ttdeci">NONE</div><div class="ttdef"><b>Definition:</b> <a href="HdfsCompression_8java_source.html#l00017">HdfsCompression.java:17</a></div></div> |
| <div class="ttc" id="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression_html_ad88f45684b5e64f059e6f31f9ce0005a"><div class="ttname"><a href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#ad88f45684b5e64f059e6f31f9ce0005a">com.cloudera.impala.catalog.HdfsCompression.GZIP</a></div><div class="ttdeci">GZIP</div><div class="ttdef"><b>Definition:</b> <a href="HdfsCompression_8java_source.html#l00019">HdfsCompression.java:19</a></div></div> |
| <div class="ttc" id="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression_html_a2abedba210737919b074a61d584cfcb0"><div class="ttname"><a href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#a2abedba210737919b074a61d584cfcb0">com.cloudera.impala.catalog.HdfsCompression.DEFLATE</a></div><div class="ttdeci">DEFLATE</div><div class="ttdef"><b>Definition:</b> <a href="HdfsCompression_8java_source.html#l00018">HdfsCompression.java:18</a></div></div> |
| <div class="ttc" id="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression_html_a0a3ec1569de126ae2efd01374198f5c8"><div class="ttname"><a href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#a0a3ec1569de126ae2efd01374198f5c8">com.cloudera.impala.catalog.HdfsCompression.toThrift</a></div><div class="ttdeci">THdfsCompression toThrift()</div><div class="ttdef"><b>Definition:</b> <a href="HdfsCompression_8java_source.html#l00048">HdfsCompression.java:48</a></div></div> |
| <div class="ttc" id="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression_html_a83a78613ca0eb6524f2fbbf7cf1f8771"><div class="ttname"><a href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#a83a78613ca0eb6524f2fbbf7cf1f8771">com.cloudera.impala.catalog.HdfsCompression.fromHdfsInputFormatClass</a></div><div class="ttdeci">static HdfsCompression fromHdfsInputFormatClass(String inputFormatClass)</div><div class="ttdef"><b>Definition:</b> <a href="HdfsCompression_8java_source.html#l00061">HdfsCompression.java:61</a></div></div> |
| <div class="ttc" id="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression_html_a318e47e6a431d5dbb10534b5a464d35a"><div class="ttname"><a href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#a318e47e6a431d5dbb10534b5a464d35a">com.cloudera.impala.catalog.HdfsCompression.LZO_INDEX</a></div><div class="ttdef"><b>Definition:</b> <a href="HdfsCompression_8java_source.html#l00023">HdfsCompression.java:23</a></div></div> |
| <div class="ttc" id="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression_html_ab35b4f724240bcd60e60b61add16cbc3"><div class="ttname"><a href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html#ab35b4f724240bcd60e60b61add16cbc3">com.cloudera.impala.catalog.HdfsCompression.BZIP2</a></div><div class="ttdeci">BZIP2</div><div class="ttdef"><b>Definition:</b> <a href="HdfsCompression_8java_source.html#l00020">HdfsCompression.java:20</a></div></div> |
| <div class="ttc" id="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsFileFormat_html"><div class="ttname"><a href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsFileFormat.html">com.cloudera.impala.catalog.HdfsFileFormat</a></div><div class="ttdef"><b>Definition:</b> <a href="HdfsFileFormat_8java_source.html#l00026">HdfsFileFormat.java:26</a></div></div> |
| <div class="ttc" id="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression_html"><div class="ttname"><a href="enumcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsCompression.html">com.cloudera.impala.catalog.HdfsCompression</a></div><div class="ttdef"><b>Definition:</b> <a href="HdfsCompression_8java_source.html#l00016">HdfsCompression.java:16</a></div></div> |
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