| <!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>ASTIntegerRange xref</title> |
| <link type="text/css" rel="stylesheet" href="../../../../../../stylesheet.css" /> |
| </head> |
| <body> |
| <div id="overview"><a href="../../../../../../../apidocs/org/apache/velocity/runtime/parser/node/ASTIntegerRange.html">View Javadoc</a></div><pre> |
| |
| <a name="1" href="#1">1</a> <strong class="jxr_keyword">package</strong> org.apache.velocity.runtime.parser.node; |
| <a name="2" href="#2">2</a> |
| <a name="3" href="#3">3</a> <em class="jxr_comment">/*</em> |
| <a name="4" href="#4">4</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one</em> |
| <a name="5" href="#5">5</a> <em class="jxr_comment"> * or more contributor license agreements. See the NOTICE file</em> |
| <a name="6" href="#6">6</a> <em class="jxr_comment"> * distributed with this work for additional information</em> |
| <a name="7" href="#7">7</a> <em class="jxr_comment"> * regarding copyright ownership. The ASF licenses this file</em> |
| <a name="8" href="#8">8</a> <em class="jxr_comment"> * to you under the Apache License, Version 2.0 (the</em> |
| <a name="9" href="#9">9</a> <em class="jxr_comment"> * "License"); you may not use this file except in compliance</em> |
| <a name="10" href="#10">10</a> <em class="jxr_comment"> * with the License. You may obtain a copy of the License at</em> |
| <a name="11" href="#11">11</a> <em class="jxr_comment"> *</em> |
| <a name="12" href="#12">12</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="13" href="#13">13</a> <em class="jxr_comment"> *</em> |
| <a name="14" href="#14">14</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing,</em> |
| <a name="15" href="#15">15</a> <em class="jxr_comment"> * software distributed under the License is distributed on an</em> |
| <a name="16" href="#16">16</a> <em class="jxr_comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em> |
| <a name="17" href="#17">17</a> <em class="jxr_comment"> * KIND, either express or implied. See the License for the</em> |
| <a name="18" href="#18">18</a> <em class="jxr_comment"> * specific language governing permissions and limitations</em> |
| <a name="19" href="#19">19</a> <em class="jxr_comment"> * under the License. </em> |
| <a name="20" href="#20">20</a> <em class="jxr_comment"> */</em> |
| <a name="21" href="#21">21</a> |
| <a name="22" href="#22">22</a> <strong class="jxr_keyword">import</strong> java.util.ArrayList; |
| <a name="23" href="#23">23</a> <strong class="jxr_keyword">import</strong> java.util.List; |
| <a name="24" href="#24">24</a> |
| <a name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> org.apache.velocity.context.InternalContextAdapter; |
| <a name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> org.apache.velocity.exception.MethodInvocationException; |
| <a name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> org.apache.velocity.runtime.parser.Parser; |
| <a name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> org.apache.velocity.runtime.parser.ParserVisitor; |
| <a name="29" href="#29">29</a> |
| <a name="30" href="#30">30</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="31" href="#31">31</a> <em class="jxr_javadoccomment"> * handles the range 'operator' [ n .. m ]</em> |
| <a name="32" href="#32">32</a> <em class="jxr_javadoccomment"> *</em> |
| <a name="33" href="#33">33</a> <em class="jxr_javadoccomment"> * Please look at the Parser.jjt file which is</em> |
| <a name="34" href="#34">34</a> <em class="jxr_javadoccomment"> * what controls the generation of this class.</em> |
| <a name="35" href="#35">35</a> <em class="jxr_javadoccomment"> *</em> |
| <a name="36" href="#36">36</a> <em class="jxr_javadoccomment"> * @author <a href="<a href="mailto:geirm@optonline.net" target="alexandria_uri">mailto:geirm@optonline.net</a>">Geir Magnusson Jr.</a></em> |
| <a name="37" href="#37">37</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="38" href="#38">38</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/apache/velocity/runtime/parser/node/ASTIntegerRange.html">ASTIntegerRange</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../../../org/apache/velocity/runtime/parser/node/SimpleNode.html">SimpleNode</a> |
| <a name="39" href="#39">39</a> { |
| <a name="40" href="#40">40</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="41" href="#41">41</a> <em class="jxr_javadoccomment"> * @param id</em> |
| <a name="42" href="#42">42</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="43" href="#43">43</a> <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/apache/velocity/runtime/parser/node/ASTIntegerRange.html">ASTIntegerRange</a>(<strong class="jxr_keyword">int</strong> id) |
| <a name="44" href="#44">44</a> { |
| <a name="45" href="#45">45</a> <strong class="jxr_keyword">super</strong>(id); |
| <a name="46" href="#46">46</a> } |
| <a name="47" href="#47">47</a> |
| <a name="48" href="#48">48</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="49" href="#49">49</a> <em class="jxr_javadoccomment"> * @param p</em> |
| <a name="50" href="#50">50</a> <em class="jxr_javadoccomment"> * @param id</em> |
| <a name="51" href="#51">51</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="52" href="#52">52</a> <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/apache/velocity/runtime/parser/node/ASTIntegerRange.html">ASTIntegerRange</a>(<a href="../../../../../../org/apache/velocity/runtime/parser/Parser.html">Parser</a> p, <strong class="jxr_keyword">int</strong> id) |
| <a name="53" href="#53">53</a> { |
| <a name="54" href="#54">54</a> <strong class="jxr_keyword">super</strong>(p, id); |
| <a name="55" href="#55">55</a> } |
| <a name="56" href="#56">56</a> |
| <a name="57" href="#57">57</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="58" href="#58">58</a> <em class="jxr_javadoccomment"> * @see org.apache.velocity.runtime.parser.node.SimpleNode#jjtAccept(org.apache.velocity.runtime.parser.ParserVisitor, java.lang.Object)</em> |
| <a name="59" href="#59">59</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="60" href="#60">60</a> <strong class="jxr_keyword">public</strong> Object jjtAccept(<a href="../../../../../../org/apache/velocity/runtime/parser/ParserVisitor.html">ParserVisitor</a> visitor, Object data) |
| <a name="61" href="#61">61</a> { |
| <a name="62" href="#62">62</a> <strong class="jxr_keyword">return</strong> visitor.visit(<strong class="jxr_keyword">this</strong>, data); |
| <a name="63" href="#63">63</a> } |
| <a name="64" href="#64">64</a> |
| <a name="65" href="#65">65</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="66" href="#66">66</a> <em class="jxr_javadoccomment"> * does the real work. Creates an Vector of Integers with the</em> |
| <a name="67" href="#67">67</a> <em class="jxr_javadoccomment"> * right value range</em> |
| <a name="68" href="#68">68</a> <em class="jxr_javadoccomment"> *</em> |
| <a name="69" href="#69">69</a> <em class="jxr_javadoccomment"> * @param context app context used if Left or Right of .. is a ref</em> |
| <a name="70" href="#70">70</a> <em class="jxr_javadoccomment"> * @return Object array of Integers</em> |
| <a name="71" href="#71">71</a> <em class="jxr_javadoccomment"> * @throws MethodInvocationException</em> |
| <a name="72" href="#72">72</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="73" href="#73">73</a> <strong class="jxr_keyword">public</strong> Object value( InternalContextAdapter context) |
| <a name="74" href="#74">74</a> <strong class="jxr_keyword">throws</strong> <a href="../../../../../../org/apache/velocity/exception/MethodInvocationException.html">MethodInvocationException</a> |
| <a name="75" href="#75">75</a> { |
| <a name="76" href="#76">76</a> <em class="jxr_comment">/*</em> |
| <a name="77" href="#77">77</a> <em class="jxr_comment"> * get the two range ends</em> |
| <a name="78" href="#78">78</a> <em class="jxr_comment"> */</em> |
| <a name="79" href="#79">79</a> |
| <a name="80" href="#80">80</a> Object left = jjtGetChild(0).value( context ); |
| <a name="81" href="#81">81</a> Object right = jjtGetChild(1).value( context ); |
| <a name="82" href="#82">82</a> |
| <a name="83" href="#83">83</a> <em class="jxr_comment">/*</em> |
| <a name="84" href="#84">84</a> <em class="jxr_comment"> * if either is null, lets log and bail</em> |
| <a name="85" href="#85">85</a> <em class="jxr_comment"> */</em> |
| <a name="86" href="#86">86</a> |
| <a name="87" href="#87">87</a> <strong class="jxr_keyword">if</strong> (left == <strong class="jxr_keyword">null</strong> || right == <strong class="jxr_keyword">null</strong>) |
| <a name="88" href="#88">88</a> { |
| <a name="89" href="#89">89</a> log.error((left == <strong class="jxr_keyword">null</strong> ? <span class="jxr_string">"Left"</span> : <span class="jxr_string">"Right"</span>) |
| <a name="90" href="#90">90</a> + <span class="jxr_string">" side of range operator [n..m] has null value."</span> |
| <a name="91" href="#91">91</a> + <span class="jxr_string">" Operation not possible. "</span> |
| <a name="92" href="#92">92</a> + context.getCurrentTemplateName() + <span class="jxr_string">" [line "</span> + getLine() |
| <a name="93" href="#93">93</a> + <span class="jxr_string">", column "</span> + getColumn() + <span class="jxr_string">"]"</span>); |
| <a name="94" href="#94">94</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>; |
| <a name="95" href="#95">95</a> } |
| <a name="96" href="#96">96</a> |
| <a name="97" href="#97">97</a> <em class="jxr_comment">/*</em> |
| <a name="98" href="#98">98</a> <em class="jxr_comment"> * if not an Integer, not much we can do either</em> |
| <a name="99" href="#99">99</a> <em class="jxr_comment"> */</em> |
| <a name="100" href="#100">100</a> |
| <a name="101" href="#101">101</a> <strong class="jxr_keyword">if</strong> ( !( left instanceof Integer ) || !( right instanceof Integer )) |
| <a name="102" href="#102">102</a> { |
| <a name="103" href="#103">103</a> log.error((!(left instanceof Integer) ? <span class="jxr_string">"Left"</span> : <span class="jxr_string">"Right"</span>) |
| <a name="104" href="#104">104</a> + <span class="jxr_string">" side of range operator is not a valid type. "</span> |
| <a name="105" href="#105">105</a> + <span class="jxr_string">"Currently only integers (1,2,3...) and Integer type is supported. "</span> |
| <a name="106" href="#106">106</a> + context.getCurrentTemplateName() + <span class="jxr_string">" [line "</span> + getLine() |
| <a name="107" href="#107">107</a> + <span class="jxr_string">", column "</span> + getColumn() + <span class="jxr_string">"]"</span>); |
| <a name="108" href="#108">108</a> |
| <a name="109" href="#109">109</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>; |
| <a name="110" href="#110">110</a> } |
| <a name="111" href="#111">111</a> |
| <a name="112" href="#112">112</a> |
| <a name="113" href="#113">113</a> <em class="jxr_comment">/*</em> |
| <a name="114" href="#114">114</a> <em class="jxr_comment"> * get the two integer values of the ends of the range</em> |
| <a name="115" href="#115">115</a> <em class="jxr_comment"> */</em> |
| <a name="116" href="#116">116</a> |
| <a name="117" href="#117">117</a> <strong class="jxr_keyword">int</strong> l = ( (Integer) left ).intValue() ; |
| <a name="118" href="#118">118</a> <strong class="jxr_keyword">int</strong> r = ( (Integer) right ).intValue(); |
| <a name="119" href="#119">119</a> |
| <a name="120" href="#120">120</a> <em class="jxr_comment">/*</em> |
| <a name="121" href="#121">121</a> <em class="jxr_comment"> * find out how many there are</em> |
| <a name="122" href="#122">122</a> <em class="jxr_comment"> */</em> |
| <a name="123" href="#123">123</a> |
| <a name="124" href="#124">124</a> <strong class="jxr_keyword">int</strong> nbrElements = Math.abs( l - r ); |
| <a name="125" href="#125">125</a> nbrElements += 1; |
| <a name="126" href="#126">126</a> |
| <a name="127" href="#127">127</a> <em class="jxr_comment">/*</em> |
| <a name="128" href="#128">128</a> <em class="jxr_comment"> * Determine whether the increment is positive or negative.</em> |
| <a name="129" href="#129">129</a> <em class="jxr_comment"> */</em> |
| <a name="130" href="#130">130</a> |
| <a name="131" href="#131">131</a> <strong class="jxr_keyword">int</strong> delta = ( l >= r ) ? -1 : 1; |
| <a name="132" href="#132">132</a> |
| <a name="133" href="#133">133</a> <em class="jxr_comment">/*</em> |
| <a name="134" href="#134">134</a> <em class="jxr_comment"> * Fill the range with the appropriate values.</em> |
| <a name="135" href="#135">135</a> <em class="jxr_comment"> */</em> |
| <a name="136" href="#136">136</a> |
| <a name="137" href="#137">137</a> List elements = <strong class="jxr_keyword">new</strong> ArrayList(nbrElements); |
| <a name="138" href="#138">138</a> <strong class="jxr_keyword">int</strong> value = l; |
| <a name="139" href="#139">139</a> |
| <a name="140" href="#140">140</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i < nbrElements; i++) |
| <a name="141" href="#141">141</a> { |
| <a name="142" href="#142">142</a> <em class="jxr_comment">// TODO: JDK 1.4+ -> valueOf()</em> |
| <a name="143" href="#143">143</a> elements.add(<strong class="jxr_keyword">new</strong> Integer(value)); |
| <a name="144" href="#144">144</a> value += delta; |
| <a name="145" href="#145">145</a> } |
| <a name="146" href="#146">146</a> |
| <a name="147" href="#147">147</a> <strong class="jxr_keyword">return</strong> elements; |
| <a name="148" href="#148">148</a> } |
| <a name="149" href="#149">149</a> } |
| </pre> |
| <hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body> |
| </html> |
| |
