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| <a name="1" href="#1">1</a> <em class="jxr_comment">/*</em> |
| <a name="2" href="#2">2</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one</em> |
| <a name="3" href="#3">3</a> <em class="jxr_comment"> * or more contributor license agreements. See the NOTICE file</em> |
| <a name="4" href="#4">4</a> <em class="jxr_comment"> * distributed with this work for additional information</em> |
| <a name="5" href="#5">5</a> <em class="jxr_comment"> * regarding copyright ownership. The ASF licenses this file</em> |
| <a name="6" href="#6">6</a> <em class="jxr_comment"> * to you under the Apache License, Version 2.0 (the</em> |
| <a name="7" href="#7">7</a> <em class="jxr_comment"> * "License"); you may not use this file except in compliance</em> |
| <a name="8" href="#8">8</a> <em class="jxr_comment"> * with the License. You may obtain a copy of the License at</em> |
| <a name="9" href="#9">9</a> <em class="jxr_comment"> *</em> |
| <a name="10" href="#10">10</a> <em class="jxr_comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em> |
| <a name="11" href="#11">11</a> <em class="jxr_comment"> *</em> |
| <a name="12" href="#12">12</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing,</em> |
| <a name="13" href="#13">13</a> <em class="jxr_comment"> * software distributed under the License is distributed on an</em> |
| <a name="14" href="#14">14</a> <em class="jxr_comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em> |
| <a name="15" href="#15">15</a> <em class="jxr_comment"> * KIND, either express or implied. See the License for the</em> |
| <a name="16" href="#16">16</a> <em class="jxr_comment"> * specific language governing permissions and limitations</em> |
| <a name="17" href="#17">17</a> <em class="jxr_comment"> * under the License.</em> |
| <a name="18" href="#18">18</a> <em class="jxr_comment"> */</em> |
| <a name="19" href="#19">19</a> <strong class="jxr_keyword">package</strong> org.apache.chemistry.opencmis.server.support.query; |
| <a name="20" href="#20">20</a> |
| <a name="21" href="#21">21</a> <strong class="jxr_keyword">import</strong> java.io.IOException; |
| <a name="22" href="#22">22</a> <strong class="jxr_keyword">import</strong> java.io.UnsupportedEncodingException; |
| <a name="23" href="#23">23</a> |
| <a name="24" href="#24">24</a> <strong class="jxr_keyword">import</strong> org.antlr.runtime.ANTLRStringStream; |
| <a name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> org.antlr.runtime.BaseRecognizer; |
| <a name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> org.antlr.runtime.CharStream; |
| <a name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> org.antlr.runtime.CommonTokenStream; |
| <a name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> org.antlr.runtime.RecognitionException; |
| <a name="29" href="#29">29</a> <strong class="jxr_keyword">import</strong> org.antlr.runtime.TokenSource; |
| <a name="30" href="#30">30</a> <strong class="jxr_keyword">import</strong> org.antlr.runtime.TokenStream; |
| <a name="31" href="#31">31</a> <strong class="jxr_keyword">import</strong> org.antlr.runtime.tree.CommonTree; |
| <a name="32" href="#32">32</a> <strong class="jxr_keyword">import</strong> org.antlr.runtime.tree.CommonTreeNodeStream; |
| <a name="33" href="#33">33</a> <strong class="jxr_keyword">import</strong> org.apache.chemistry.opencmis.commons.exceptions.CmisBaseException; |
| <a name="34" href="#34">34</a> <strong class="jxr_keyword">import</strong> org.apache.chemistry.opencmis.commons.exceptions.CmisInvalidArgumentException; |
| <a name="35" href="#35">35</a> <strong class="jxr_keyword">import</strong> org.apache.chemistry.opencmis.server.support.query.CmisQlStrictParser_CmisBaseGrammar.query_<strong class="jxr_keyword">return</strong>; |
| <a name="36" href="#36">36</a> |
| <a name="37" href="#37">37</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="38" href="#38">38</a> <em class="jxr_javadoccomment"> * Utility class providing convenience methods for parsing CMIS queries. </em> |
| <a name="39" href="#39">39</a> <em class="jxr_javadoccomment"> *</em> |
| <a name="40" href="#40">40</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="41" href="#41">41</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../../org/apache/chemistry/opencmis/server/support/query/QueryUtil.html">QueryUtil</a> { |
| <a name="42" href="#42">42</a> |
| <a name="43" href="#43">43</a> <strong class="jxr_keyword">private</strong> CmisQueryWalker walker; |
| <a name="44" href="#44">44</a> |
| <a name="45" href="#45">45</a> <em class="jxr_comment">// convenience method because everybody needs this piece of code</em> |
| <a name="46" href="#46">46</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> CmisQueryWalker getWalker(String statement) <strong class="jxr_keyword">throws</strong> RecognitionException { |
| <a name="47" href="#47">47</a> |
| <a name="48" href="#48">48</a> CharStream input = <strong class="jxr_keyword">new</strong> ANTLRStringStream(statement); |
| <a name="49" href="#49">49</a> TokenSource lexer = <strong class="jxr_keyword">new</strong> CmisQlStrictLexer(input); |
| <a name="50" href="#50">50</a> TokenStream tokens = <strong class="jxr_keyword">new</strong> CommonTokenStream(lexer); |
| <a name="51" href="#51">51</a> CmisQlStrictParser parser = <strong class="jxr_keyword">new</strong> CmisQlStrictParser(tokens); |
| <a name="52" href="#52">52</a> CommonTree parserTree; <em class="jxr_comment">// the ANTLR tree after parsing phase</em> |
| <a name="53" href="#53">53</a> |
| <a name="54" href="#54">54</a> query_<strong class="jxr_keyword">return</strong> parsedStatement = parser.query(); |
| <a name="55" href="#55">55</a> <strong class="jxr_keyword">if</strong> (parser.hasErrors()) { |
| <a name="56" href="#56">56</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> CmisInvalidArgumentException(parser.getErrorMessages()); |
| <a name="57" href="#57">57</a> } |
| <a name="58" href="#58">58</a> parserTree = (CommonTree) parsedStatement.getTree(); |
| <a name="59" href="#59">59</a> |
| <a name="60" href="#60">60</a> CommonTreeNodeStream nodes = <strong class="jxr_keyword">new</strong> CommonTreeNodeStream(parserTree); |
| <a name="61" href="#61">61</a> nodes.setTokenStream(tokens); |
| <a name="62" href="#62">62</a> CmisQueryWalker walker = <strong class="jxr_keyword">new</strong> CmisQueryWalker(nodes); |
| <a name="63" href="#63">63</a> <strong class="jxr_keyword">return</strong> walker; |
| <a name="64" href="#64">64</a> } |
| <a name="65" href="#65">65</a> |
| <a name="66" href="#66">66</a> <strong class="jxr_keyword">public</strong> CmisQueryWalker traverseStatement(String statement, <a href="../../../../../../../org/apache/chemistry/opencmis/server/support/query/QueryObject.html">QueryObject</a> queryObj, <a href="../../../../../../../org/apache/chemistry/opencmis/server/support/query/PredicateWalkerBase.html">PredicateWalkerBase</a> pw) <strong class="jxr_keyword">throws</strong> UnsupportedEncodingException, IOException, RecognitionException { |
| <a name="67" href="#67">67</a> walker = getWalker(statement); |
| <a name="68" href="#68">68</a> walker.query(queryObj, pw); |
| <a name="69" href="#69">69</a> walker.getWherePredicateTree(); |
| <a name="70" href="#70">70</a> <strong class="jxr_keyword">return</strong> walker; |
| <a name="71" href="#71">71</a> } |
| <a name="72" href="#72">72</a> |
| <a name="73" href="#73">73</a> <strong class="jxr_keyword">public</strong> CmisQueryWalker traverseStatementAndCatchExc(String statement, <a href="../../../../../../../org/apache/chemistry/opencmis/server/support/query/QueryObject.html">QueryObject</a> queryObj, <a href="../../../../../../../org/apache/chemistry/opencmis/server/support/query/PredicateWalkerBase.html">PredicateWalkerBase</a> pw) { |
| <a name="74" href="#74">74</a> <strong class="jxr_keyword">try</strong> { |
| <a name="75" href="#75">75</a> <strong class="jxr_keyword">return</strong> traverseStatement(statement, queryObj, pw); |
| <a name="76" href="#76">76</a> } <strong class="jxr_keyword">catch</strong> (RecognitionException e) { |
| <a name="77" href="#77">77</a> String errorMsg = queryObj.getErrorMessage(); |
| <a name="78" href="#78">78</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> CmisInvalidArgumentException(<span class="jxr_string">"Walking of statement failed with RecognitionException error: \n "</span> + errorMsg); |
| <a name="79" href="#79">79</a> } <strong class="jxr_keyword">catch</strong> (CmisBaseException e) { |
| <a name="80" href="#80">80</a> <strong class="jxr_keyword">throw</strong> e; |
| <a name="81" href="#81">81</a> } <strong class="jxr_keyword">catch</strong> (Exception e) { |
| <a name="82" href="#82">82</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> CmisInvalidArgumentException(<span class="jxr_string">"Walking of statement failed with exception: \n "</span> + e); |
| <a name="83" href="#83">83</a> } |
| <a name="84" href="#84">84</a> } |
| <a name="85" href="#85">85</a> |
| <a name="86" href="#86">86</a> <strong class="jxr_keyword">public</strong> String getErrorMessage(RecognitionException e) { |
| <a name="87" href="#87">87</a> <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">null</strong> == walker) |
| <a name="88" href="#88">88</a> <strong class="jxr_keyword">return</strong> e.toString(); |
| <a name="89" href="#89">89</a> <strong class="jxr_keyword">else</strong> |
| <a name="90" href="#90">90</a> <strong class="jxr_keyword">return</strong> getErrorMessage(walker, e); |
| <a name="91" href="#91">91</a> } |
| <a name="92" href="#92">92</a> |
| <a name="93" href="#93">93</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> String getErrorMessage(BaseRecognizer recognizer, RecognitionException e) { |
| <a name="94" href="#94">94</a> String[] tokenNames = recognizer.getTokenNames(); |
| <a name="95" href="#95">95</a> <em class="jxr_comment">// String hdr = walker.getErrorHeader(e);</em> |
| <a name="96" href="#96">96</a> String hdr = <span class="jxr_string">"Line "</span>+e.line+<span class="jxr_string">":"</span>+e.charPositionInLine; |
| <a name="97" href="#97">97</a> String msg = recognizer.getErrorMessage(e, tokenNames); |
| <a name="98" href="#98">98</a> <strong class="jxr_keyword">return</strong> hdr + <span class="jxr_string">" "</span> + msg; |
| <a name="99" href="#99">99</a> } |
| <a name="100" href="#100">100</a> |
| <a name="101" href="#101">101</a> } |
| </pre> |
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