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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span>// $Id: Syntax.java 482 2012-01-05 23:27:27Z jhyde $<a name="line.2"></a>
<span class="sourceLineNo">003</span>//<a name="line.3"></a>
<span class="sourceLineNo">004</span>// Licensed to Julian Hyde under one or more contributor license<a name="line.4"></a>
<span class="sourceLineNo">005</span>// agreements. See the NOTICE file distributed with this work for<a name="line.5"></a>
<span class="sourceLineNo">006</span>// additional information regarding copyright ownership.<a name="line.6"></a>
<span class="sourceLineNo">007</span>//<a name="line.7"></a>
<span class="sourceLineNo">008</span>// Julian Hyde licenses this file to you under the Apache License,<a name="line.8"></a>
<span class="sourceLineNo">009</span>// Version 2.0 (the "License"); you may not use this file except in<a name="line.9"></a>
<span class="sourceLineNo">010</span>// compliance with the License. You may obtain a copy of the License at:<a name="line.10"></a>
<span class="sourceLineNo">011</span>//<a name="line.11"></a>
<span class="sourceLineNo">012</span>// http://www.apache.org/licenses/LICENSE-2.0<a name="line.12"></a>
<span class="sourceLineNo">013</span>//<a name="line.13"></a>
<span class="sourceLineNo">014</span>// Unless required by applicable law or agreed to in writing, software<a name="line.14"></a>
<span class="sourceLineNo">015</span>// distributed under the License is distributed on an "AS IS" BASIS,<a name="line.15"></a>
<span class="sourceLineNo">016</span>// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.16"></a>
<span class="sourceLineNo">017</span>// See the License for the specific language governing permissions and<a name="line.17"></a>
<span class="sourceLineNo">018</span>// limitations under the License.<a name="line.18"></a>
<span class="sourceLineNo">019</span>*/<a name="line.19"></a>
<span class="sourceLineNo">020</span>package org.olap4j.mdx;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.io.PrintWriter;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.List;<a name="line.23"></a>
<span class="sourceLineNo">024</span><a name="line.24"></a>
<span class="sourceLineNo">025</span>/**<a name="line.25"></a>
<span class="sourceLineNo">026</span> * Enumerated values describing the syntax of an expression.<a name="line.26"></a>
<span class="sourceLineNo">027</span> *<a name="line.27"></a>
<span class="sourceLineNo">028</span> * @author jhyde<a name="line.28"></a>
<span class="sourceLineNo">029</span> * @since 21 July, 2003<a name="line.29"></a>
<span class="sourceLineNo">030</span> * @version $Id: Syntax.java 482 2012-01-05 23:27:27Z jhyde $<a name="line.30"></a>
<span class="sourceLineNo">031</span> */<a name="line.31"></a>
<span class="sourceLineNo">032</span>public enum Syntax {<a name="line.32"></a>
<span class="sourceLineNo">033</span> /**<a name="line.33"></a>
<span class="sourceLineNo">034</span> * Defines syntax for expression invoked <code>FUNCTION()</code> or<a name="line.34"></a>
<span class="sourceLineNo">035</span> * <code>FUNCTION(args)</code>.<a name="line.35"></a>
<span class="sourceLineNo">036</span> */<a name="line.36"></a>
<span class="sourceLineNo">037</span> Function {<a name="line.37"></a>
<span class="sourceLineNo">038</span> public void unparse(<a name="line.38"></a>
<span class="sourceLineNo">039</span> String operatorName,<a name="line.39"></a>
<span class="sourceLineNo">040</span> List<ParseTreeNode> argList,<a name="line.40"></a>
<span class="sourceLineNo">041</span> ParseTreeWriter writer)<a name="line.41"></a>
<span class="sourceLineNo">042</span> {<a name="line.42"></a>
<span class="sourceLineNo">043</span> unparseList(writer, argList, operatorName + "(", ", ", ")");<a name="line.43"></a>
<span class="sourceLineNo">044</span> }<a name="line.44"></a>
<span class="sourceLineNo">045</span> },<a name="line.45"></a>
<span class="sourceLineNo">046</span><a name="line.46"></a>
<span class="sourceLineNo">047</span> /**<a name="line.47"></a>
<span class="sourceLineNo">048</span> * Defines syntax for expression invoked as <code>object.PROPERTY</code>.<a name="line.48"></a>
<span class="sourceLineNo">049</span> */<a name="line.49"></a>
<span class="sourceLineNo">050</span> Property {<a name="line.50"></a>
<span class="sourceLineNo">051</span> public void unparse(<a name="line.51"></a>
<span class="sourceLineNo">052</span> String operatorName,<a name="line.52"></a>
<span class="sourceLineNo">053</span> List<ParseTreeNode> argList,<a name="line.53"></a>
<span class="sourceLineNo">054</span> ParseTreeWriter writer)<a name="line.54"></a>
<span class="sourceLineNo">055</span> {<a name="line.55"></a>
<span class="sourceLineNo">056</span> assert argList.size() == 1;<a name="line.56"></a>
<span class="sourceLineNo">057</span> argList.get(0).unparse(writer); // 'this'<a name="line.57"></a>
<span class="sourceLineNo">058</span> writer.getPrintWriter().print(".");<a name="line.58"></a>
<span class="sourceLineNo">059</span> writer.getPrintWriter().print(operatorName);<a name="line.59"></a>
<span class="sourceLineNo">060</span> }<a name="line.60"></a>
<span class="sourceLineNo">061</span> },<a name="line.61"></a>
<span class="sourceLineNo">062</span><a name="line.62"></a>
<span class="sourceLineNo">063</span> /**<a name="line.63"></a>
<span class="sourceLineNo">064</span> * Defines syntax for expression invoked invoked as<a name="line.64"></a>
<span class="sourceLineNo">065</span> * <code>object.METHOD()</code> or<a name="line.65"></a>
<span class="sourceLineNo">066</span> * <code>object.METHOD(args)</code>.<a name="line.66"></a>
<span class="sourceLineNo">067</span> */<a name="line.67"></a>
<span class="sourceLineNo">068</span> Method {<a name="line.68"></a>
<span class="sourceLineNo">069</span> public void unparse(<a name="line.69"></a>
<span class="sourceLineNo">070</span> String operatorName,<a name="line.70"></a>
<span class="sourceLineNo">071</span> List<ParseTreeNode> argList,<a name="line.71"></a>
<span class="sourceLineNo">072</span> ParseTreeWriter writer)<a name="line.72"></a>
<span class="sourceLineNo">073</span> {<a name="line.73"></a>
<span class="sourceLineNo">074</span> assert argList.size() >= 1;<a name="line.74"></a>
<span class="sourceLineNo">075</span> argList.get(0).unparse(writer); // 'this'<a name="line.75"></a>
<span class="sourceLineNo">076</span> final PrintWriter pw = writer.getPrintWriter();<a name="line.76"></a>
<span class="sourceLineNo">077</span> pw.print(".");<a name="line.77"></a>
<span class="sourceLineNo">078</span> pw.print(operatorName);<a name="line.78"></a>
<span class="sourceLineNo">079</span> pw.print("(");<a name="line.79"></a>
<span class="sourceLineNo">080</span> for (int i = 1; i < argList.size(); i++) {<a name="line.80"></a>
<span class="sourceLineNo">081</span> if (i > 1) {<a name="line.81"></a>
<span class="sourceLineNo">082</span> pw.print(", ");<a name="line.82"></a>
<span class="sourceLineNo">083</span> }<a name="line.83"></a>
<span class="sourceLineNo">084</span> argList.get(i).unparse(writer);<a name="line.84"></a>
<span class="sourceLineNo">085</span> }<a name="line.85"></a>
<span class="sourceLineNo">086</span> pw.print(")");<a name="line.86"></a>
<span class="sourceLineNo">087</span> }<a name="line.87"></a>
<span class="sourceLineNo">088</span> },<a name="line.88"></a>
<span class="sourceLineNo">089</span><a name="line.89"></a>
<span class="sourceLineNo">090</span> /**<a name="line.90"></a>
<span class="sourceLineNo">091</span> * Defines syntax for expression invoked as <code>arg OPERATOR arg</code><a name="line.91"></a>
<span class="sourceLineNo">092</span> * (like '+' or 'AND').<a name="line.92"></a>
<span class="sourceLineNo">093</span> */<a name="line.93"></a>
<span class="sourceLineNo">094</span> Infix {<a name="line.94"></a>
<span class="sourceLineNo">095</span> public void unparse(<a name="line.95"></a>
<span class="sourceLineNo">096</span> String operatorName,<a name="line.96"></a>
<span class="sourceLineNo">097</span> List<ParseTreeNode> argList,<a name="line.97"></a>
<span class="sourceLineNo">098</span> ParseTreeWriter writer)<a name="line.98"></a>
<span class="sourceLineNo">099</span> {<a name="line.99"></a>
<span class="sourceLineNo">100</span> if (needParen(argList)) {<a name="line.100"></a>
<span class="sourceLineNo">101</span> unparseList(<a name="line.101"></a>
<span class="sourceLineNo">102</span> writer,<a name="line.102"></a>
<span class="sourceLineNo">103</span> argList,<a name="line.103"></a>
<span class="sourceLineNo">104</span> "(",<a name="line.104"></a>
<span class="sourceLineNo">105</span> " " + operatorName + " ",<a name="line.105"></a>
<span class="sourceLineNo">106</span> ")");<a name="line.106"></a>
<span class="sourceLineNo">107</span> } else {<a name="line.107"></a>
<span class="sourceLineNo">108</span> unparseList(<a name="line.108"></a>
<span class="sourceLineNo">109</span> writer,<a name="line.109"></a>
<span class="sourceLineNo">110</span> argList,<a name="line.110"></a>
<span class="sourceLineNo">111</span> "",<a name="line.111"></a>
<span class="sourceLineNo">112</span> " " + operatorName + " ",<a name="line.112"></a>
<span class="sourceLineNo">113</span> "");<a name="line.113"></a>
<span class="sourceLineNo">114</span> }<a name="line.114"></a>
<span class="sourceLineNo">115</span> }<a name="line.115"></a>
<span class="sourceLineNo">116</span> },<a name="line.116"></a>
<span class="sourceLineNo">117</span><a name="line.117"></a>
<span class="sourceLineNo">118</span> /**<a name="line.118"></a>
<span class="sourceLineNo">119</span> * Defines syntax for expression invoked as <code>OPERATOR arg</code><a name="line.119"></a>
<span class="sourceLineNo">120</span> * (like unary '-').<a name="line.120"></a>
<span class="sourceLineNo">121</span> */<a name="line.121"></a>
<span class="sourceLineNo">122</span> Prefix {<a name="line.122"></a>
<span class="sourceLineNo">123</span> public void unparse(<a name="line.123"></a>
<span class="sourceLineNo">124</span> String operatorName,<a name="line.124"></a>
<span class="sourceLineNo">125</span> List<ParseTreeNode> argList,<a name="line.125"></a>
<span class="sourceLineNo">126</span> ParseTreeWriter writer)<a name="line.126"></a>
<span class="sourceLineNo">127</span> {<a name="line.127"></a>
<span class="sourceLineNo">128</span> if (needParen(argList)) {<a name="line.128"></a>
<span class="sourceLineNo">129</span> unparseList(<a name="line.129"></a>
<span class="sourceLineNo">130</span> writer,<a name="line.130"></a>
<span class="sourceLineNo">131</span> argList,<a name="line.131"></a>
<span class="sourceLineNo">132</span> "(" + operatorName + " ",<a name="line.132"></a>
<span class="sourceLineNo">133</span> null,<a name="line.133"></a>
<span class="sourceLineNo">134</span> ")");<a name="line.134"></a>
<span class="sourceLineNo">135</span> } else {<a name="line.135"></a>
<span class="sourceLineNo">136</span> unparseList(<a name="line.136"></a>
<span class="sourceLineNo">137</span> writer,<a name="line.137"></a>
<span class="sourceLineNo">138</span> argList,<a name="line.138"></a>
<span class="sourceLineNo">139</span> operatorName + " ",<a name="line.139"></a>
<span class="sourceLineNo">140</span> null,<a name="line.140"></a>
<span class="sourceLineNo">141</span> "");<a name="line.141"></a>
<span class="sourceLineNo">142</span> }<a name="line.142"></a>
<span class="sourceLineNo">143</span> }<a name="line.143"></a>
<span class="sourceLineNo">144</span> },<a name="line.144"></a>
<span class="sourceLineNo">145</span><a name="line.145"></a>
<span class="sourceLineNo">146</span> /**<a name="line.146"></a>
<span class="sourceLineNo">147</span> * Defines syntax for expression invoked as <code>arg OPERATOR</code><a name="line.147"></a>
<span class="sourceLineNo">148</span> * (like <code>IS EMPTY</code>).<a name="line.148"></a>
<span class="sourceLineNo">149</span> */<a name="line.149"></a>
<span class="sourceLineNo">150</span> Postfix {<a name="line.150"></a>
<span class="sourceLineNo">151</span> public void unparse(<a name="line.151"></a>
<span class="sourceLineNo">152</span> String operatorName,<a name="line.152"></a>
<span class="sourceLineNo">153</span> List<ParseTreeNode> argList,<a name="line.153"></a>
<span class="sourceLineNo">154</span> ParseTreeWriter writer)<a name="line.154"></a>
<span class="sourceLineNo">155</span> {<a name="line.155"></a>
<span class="sourceLineNo">156</span> if (needParen(argList)) {<a name="line.156"></a>
<span class="sourceLineNo">157</span> unparseList(<a name="line.157"></a>
<span class="sourceLineNo">158</span> writer,<a name="line.158"></a>
<span class="sourceLineNo">159</span> argList,<a name="line.159"></a>
<span class="sourceLineNo">160</span> "(",<a name="line.160"></a>
<span class="sourceLineNo">161</span> null,<a name="line.161"></a>
<span class="sourceLineNo">162</span> " " + operatorName + ")");<a name="line.162"></a>
<span class="sourceLineNo">163</span> } else {<a name="line.163"></a>
<span class="sourceLineNo">164</span> unparseList(<a name="line.164"></a>
<span class="sourceLineNo">165</span> writer,<a name="line.165"></a>
<span class="sourceLineNo">166</span> argList,<a name="line.166"></a>
<span class="sourceLineNo">167</span> "",<a name="line.167"></a>
<span class="sourceLineNo">168</span> null,<a name="line.168"></a>
<span class="sourceLineNo">169</span> " " + operatorName);<a name="line.169"></a>
<span class="sourceLineNo">170</span> }<a name="line.170"></a>
<span class="sourceLineNo">171</span> }<a name="line.171"></a>
<span class="sourceLineNo">172</span> },<a name="line.172"></a>
<span class="sourceLineNo">173</span><a name="line.173"></a>
<span class="sourceLineNo">174</span> /**<a name="line.174"></a>
<span class="sourceLineNo">175</span> * Defines syntax for expression invoked as<a name="line.175"></a>
<span class="sourceLineNo">176</span> * <code>{ARG, &#46;&#46;&#46;}</code>; that<a name="line.176"></a>
<span class="sourceLineNo">177</span> * is, the set construction operator.<a name="line.177"></a>
<span class="sourceLineNo">178</span> */<a name="line.178"></a>
<span class="sourceLineNo">179</span> Braces {<a name="line.179"></a>
<span class="sourceLineNo">180</span> public void unparse(<a name="line.180"></a>
<span class="sourceLineNo">181</span> String operatorName,<a name="line.181"></a>
<span class="sourceLineNo">182</span> List<ParseTreeNode> argList,<a name="line.182"></a>
<span class="sourceLineNo">183</span> ParseTreeWriter writer)<a name="line.183"></a>
<span class="sourceLineNo">184</span> {<a name="line.184"></a>
<span class="sourceLineNo">185</span> unparseList(<a name="line.185"></a>
<span class="sourceLineNo">186</span> writer,<a name="line.186"></a>
<span class="sourceLineNo">187</span> argList,<a name="line.187"></a>
<span class="sourceLineNo">188</span> "{",<a name="line.188"></a>
<span class="sourceLineNo">189</span> ", ",<a name="line.189"></a>
<span class="sourceLineNo">190</span> "}");<a name="line.190"></a>
<span class="sourceLineNo">191</span> }<a name="line.191"></a>
<span class="sourceLineNo">192</span> },<a name="line.192"></a>
<span class="sourceLineNo">193</span><a name="line.193"></a>
<span class="sourceLineNo">194</span> /**<a name="line.194"></a>
<span class="sourceLineNo">195</span> * Defines syntax for expression invoked as <code>(ARG)</code> or<a name="line.195"></a>
<span class="sourceLineNo">196</span> * <code>(ARG, &#46;&#46;&#46;)</code>; that is, parentheses for grouping<a name="line.196"></a>
<span class="sourceLineNo">197</span> * expressions, and the tuple construction operator.<a name="line.197"></a>
<span class="sourceLineNo">198</span> */<a name="line.198"></a>
<span class="sourceLineNo">199</span> Parentheses {<a name="line.199"></a>
<span class="sourceLineNo">200</span> public void unparse(<a name="line.200"></a>
<span class="sourceLineNo">201</span> String operatorName,<a name="line.201"></a>
<span class="sourceLineNo">202</span> List<ParseTreeNode> argList,<a name="line.202"></a>
<span class="sourceLineNo">203</span> ParseTreeWriter writer)<a name="line.203"></a>
<span class="sourceLineNo">204</span> {<a name="line.204"></a>
<span class="sourceLineNo">205</span> if (argList.size() == 1<a name="line.205"></a>
<span class="sourceLineNo">206</span> && argList.get(0) instanceof CallNode<a name="line.206"></a>
<span class="sourceLineNo">207</span> && needParen(((CallNode) argList.get(0)).getArgList()))<a name="line.207"></a>
<span class="sourceLineNo">208</span> {<a name="line.208"></a>
<span class="sourceLineNo">209</span> // The parenthesized expression is going to defensively<a name="line.209"></a>
<span class="sourceLineNo">210</span> // parenthesize itself. So, don't add another layer.<a name="line.210"></a>
<span class="sourceLineNo">211</span> argList.get(0).unparse(writer);<a name="line.211"></a>
<span class="sourceLineNo">212</span> } else {<a name="line.212"></a>
<span class="sourceLineNo">213</span> unparseList(<a name="line.213"></a>
<span class="sourceLineNo">214</span> writer,<a name="line.214"></a>
<span class="sourceLineNo">215</span> argList,<a name="line.215"></a>
<span class="sourceLineNo">216</span> "(",<a name="line.216"></a>
<span class="sourceLineNo">217</span> ", ",<a name="line.217"></a>
<span class="sourceLineNo">218</span> ")");<a name="line.218"></a>
<span class="sourceLineNo">219</span> }<a name="line.219"></a>
<span class="sourceLineNo">220</span> }<a name="line.220"></a>
<span class="sourceLineNo">221</span> },<a name="line.221"></a>
<span class="sourceLineNo">222</span><a name="line.222"></a>
<span class="sourceLineNo">223</span> /**<a name="line.223"></a>
<span class="sourceLineNo">224</span> * Defines syntax for expression invoked as <code>CASE ... END</code>.<a name="line.224"></a>
<span class="sourceLineNo">225</span> */<a name="line.225"></a>
<span class="sourceLineNo">226</span> Case {<a name="line.226"></a>
<span class="sourceLineNo">227</span> public void unparse(<a name="line.227"></a>
<span class="sourceLineNo">228</span> String operatorName,<a name="line.228"></a>
<span class="sourceLineNo">229</span> List<ParseTreeNode> argList,<a name="line.229"></a>
<span class="sourceLineNo">230</span> ParseTreeWriter writer)<a name="line.230"></a>
<span class="sourceLineNo">231</span> {<a name="line.231"></a>
<span class="sourceLineNo">232</span> final PrintWriter pw = writer.getPrintWriter();<a name="line.232"></a>
<span class="sourceLineNo">233</span> if (operatorName.equals("_CaseTest")) {<a name="line.233"></a>
<span class="sourceLineNo">234</span> pw.print("CASE");<a name="line.234"></a>
<span class="sourceLineNo">235</span> int j = 0;<a name="line.235"></a>
<span class="sourceLineNo">236</span> int clauseCount = (argList.size() - j) / 2;<a name="line.236"></a>
<span class="sourceLineNo">237</span> for (int i = 0; i < clauseCount; i++) {<a name="line.237"></a>
<span class="sourceLineNo">238</span> pw.print(" WHEN ");<a name="line.238"></a>
<span class="sourceLineNo">239</span> argList.get(j++).unparse(writer);<a name="line.239"></a>
<span class="sourceLineNo">240</span> pw.print(" THEN ");<a name="line.240"></a>
<span class="sourceLineNo">241</span> argList.get(j++).unparse(writer);<a name="line.241"></a>
<span class="sourceLineNo">242</span> }<a name="line.242"></a>
<span class="sourceLineNo">243</span> if (j < argList.size()) {<a name="line.243"></a>
<span class="sourceLineNo">244</span> pw.print(" ELSE ");<a name="line.244"></a>
<span class="sourceLineNo">245</span> argList.get(j++).unparse(writer);<a name="line.245"></a>
<span class="sourceLineNo">246</span> }<a name="line.246"></a>
<span class="sourceLineNo">247</span> assert j == argList.size();<a name="line.247"></a>
<span class="sourceLineNo">248</span> pw.print(" END");<a name="line.248"></a>
<span class="sourceLineNo">249</span> } else {<a name="line.249"></a>
<span class="sourceLineNo">250</span> assert operatorName.equals("_CaseMatch");<a name="line.250"></a>
<span class="sourceLineNo">251</span><a name="line.251"></a>
<span class="sourceLineNo">252</span> pw.print("CASE ");<a name="line.252"></a>
<span class="sourceLineNo">253</span> int j = 0;<a name="line.253"></a>
<span class="sourceLineNo">254</span> argList.get(j++).unparse(writer);<a name="line.254"></a>
<span class="sourceLineNo">255</span> int clauseCount = (argList.size() - j) / 2;<a name="line.255"></a>
<span class="sourceLineNo">256</span> for (int i = 0; i < clauseCount; i++) {<a name="line.256"></a>
<span class="sourceLineNo">257</span> pw.print(" WHEN ");<a name="line.257"></a>
<span class="sourceLineNo">258</span> argList.get(j++).unparse(writer);<a name="line.258"></a>
<span class="sourceLineNo">259</span> pw.print(" THEN ");<a name="line.259"></a>
<span class="sourceLineNo">260</span> argList.get(j++).unparse(writer);<a name="line.260"></a>
<span class="sourceLineNo">261</span> }<a name="line.261"></a>
<span class="sourceLineNo">262</span> if (j < argList.size()) {<a name="line.262"></a>
<span class="sourceLineNo">263</span> pw.print(" ELSE ");<a name="line.263"></a>
<span class="sourceLineNo">264</span> argList.get(j++).unparse(writer);<a name="line.264"></a>
<span class="sourceLineNo">265</span> }<a name="line.265"></a>
<span class="sourceLineNo">266</span> assert j == argList.size();<a name="line.266"></a>
<span class="sourceLineNo">267</span> pw.print(" END");<a name="line.267"></a>
<span class="sourceLineNo">268</span> }<a name="line.268"></a>
<span class="sourceLineNo">269</span> }<a name="line.269"></a>
<span class="sourceLineNo">270</span> },<a name="line.270"></a>
<span class="sourceLineNo">271</span><a name="line.271"></a>
<span class="sourceLineNo">272</span> /**<a name="line.272"></a>
<span class="sourceLineNo">273</span> * Defines syntax for expression generated by the system which<a name="line.273"></a>
<span class="sourceLineNo">274</span> * cannot be specified syntactically.<a name="line.274"></a>
<span class="sourceLineNo">275</span> */<a name="line.275"></a>
<span class="sourceLineNo">276</span> Internal,<a name="line.276"></a>
<span class="sourceLineNo">277</span><a name="line.277"></a>
<span class="sourceLineNo">278</span> /**<a name="line.278"></a>
<span class="sourceLineNo">279</span> * Defines syntax for a CAST expression<a name="line.279"></a>
<span class="sourceLineNo">280</span> * <code>CAST(expression AS type)</code>.<a name="line.280"></a>
<span class="sourceLineNo">281</span> */<a name="line.281"></a>
<span class="sourceLineNo">282</span> Cast {<a name="line.282"></a>
<span class="sourceLineNo">283</span> public void unparse(<a name="line.283"></a>
<span class="sourceLineNo">284</span> String operatorName,<a name="line.284"></a>
<span class="sourceLineNo">285</span> List<ParseTreeNode> argList,<a name="line.285"></a>
<span class="sourceLineNo">286</span> ParseTreeWriter writer)<a name="line.286"></a>
<span class="sourceLineNo">287</span> {<a name="line.287"></a>
<span class="sourceLineNo">288</span> writer.getPrintWriter().print("CAST(");<a name="line.288"></a>
<span class="sourceLineNo">289</span> argList.get(0).unparse(writer);<a name="line.289"></a>
<span class="sourceLineNo">290</span> writer.getPrintWriter().print(" AS ");<a name="line.290"></a>
<span class="sourceLineNo">291</span> argList.get(1).unparse(writer);<a name="line.291"></a>
<span class="sourceLineNo">292</span> writer.getPrintWriter().print(")");<a name="line.292"></a>
<span class="sourceLineNo">293</span> }<a name="line.293"></a>
<span class="sourceLineNo">294</span> },<a name="line.294"></a>
<span class="sourceLineNo">295</span><a name="line.295"></a>
<span class="sourceLineNo">296</span> /**<a name="line.296"></a>
<span class="sourceLineNo">297</span> * Defines syntax for expression invoked <code>object&#46;&PROPERTY</code><a name="line.297"></a>
<span class="sourceLineNo">298</span> * (a variant of {@link #Property}).<a name="line.298"></a>
<span class="sourceLineNo">299</span> */<a name="line.299"></a>
<span class="sourceLineNo">300</span> QuotedProperty,<a name="line.300"></a>
<span class="sourceLineNo">301</span><a name="line.301"></a>
<span class="sourceLineNo">302</span> /**<a name="line.302"></a>
<span class="sourceLineNo">303</span> * Defines syntax for expression invoked <code>object&#46;[&PROPERTY]</code><a name="line.303"></a>
<span class="sourceLineNo">304</span> * (a variant of {@link #Property}).<a name="line.304"></a>
<span class="sourceLineNo">305</span> */<a name="line.305"></a>
<span class="sourceLineNo">306</span> AmpersandQuotedProperty,<a name="line.306"></a>
<span class="sourceLineNo">307</span><a name="line.307"></a>
<span class="sourceLineNo">308</span> /**<a name="line.308"></a>
<span class="sourceLineNo">309</span> * Defines the syntax for an empty expression. Empty expressions can occur<a name="line.309"></a>
<span class="sourceLineNo">310</span> * within function calls, and are denoted by a pair of commas with only<a name="line.310"></a>
<span class="sourceLineNo">311</span> * whitespace between them, for example<a name="line.311"></a>
<span class="sourceLineNo">312</span> *<a name="line.312"></a>
<span class="sourceLineNo">313</span> * <blockquote><a name="line.313"></a>
<span class="sourceLineNo">314</span> * <code>DrillDownLevelTop({[Product].[All Products]}, 3, ,<a name="line.314"></a>
<span class="sourceLineNo">315</span> * [Measures].[Unit Sales])</code><a name="line.315"></a>
<span class="sourceLineNo">316</span> * </blockquote><a name="line.316"></a>
<span class="sourceLineNo">317</span> */<a name="line.317"></a>
<span class="sourceLineNo">318</span> Empty {<a name="line.318"></a>
<span class="sourceLineNo">319</span> public void unparse(<a name="line.319"></a>
<span class="sourceLineNo">320</span> String operatorName,<a name="line.320"></a>
<span class="sourceLineNo">321</span> List<ParseTreeNode> argList,<a name="line.321"></a>
<span class="sourceLineNo">322</span> ParseTreeWriter writer)<a name="line.322"></a>
<span class="sourceLineNo">323</span> {<a name="line.323"></a>
<span class="sourceLineNo">324</span> assert argList.size() == 0;<a name="line.324"></a>
<span class="sourceLineNo">325</span> }<a name="line.325"></a>
<span class="sourceLineNo">326</span> };<a name="line.326"></a>
<span class="sourceLineNo">327</span><a name="line.327"></a>
<span class="sourceLineNo">328</span> /**<a name="line.328"></a>
<span class="sourceLineNo">329</span> * Converts a call to a function of this syntax into source code.<a name="line.329"></a>
<span class="sourceLineNo">330</span> *<a name="line.330"></a>
<span class="sourceLineNo">331</span> * @param operatorName Operator name<a name="line.331"></a>
<span class="sourceLineNo">332</span> * @param argList List of arguments<a name="line.332"></a>
<span class="sourceLineNo">333</span> * @param writer Writer<a name="line.333"></a>
<span class="sourceLineNo">334</span> */<a name="line.334"></a>
<span class="sourceLineNo">335</span> public void unparse(<a name="line.335"></a>
<span class="sourceLineNo">336</span> String operatorName,<a name="line.336"></a>
<span class="sourceLineNo">337</span> List<ParseTreeNode> argList,<a name="line.337"></a>
<span class="sourceLineNo">338</span> ParseTreeWriter writer)<a name="line.338"></a>
<span class="sourceLineNo">339</span> {<a name="line.339"></a>
<span class="sourceLineNo">340</span> throw new UnsupportedOperationException();<a name="line.340"></a>
<span class="sourceLineNo">341</span> }<a name="line.341"></a>
<span class="sourceLineNo">342</span><a name="line.342"></a>
<span class="sourceLineNo">343</span> /**<a name="line.343"></a>
<span class="sourceLineNo">344</span> * Returns whether a collection of parse tree nodes need to be enclosed<a name="line.344"></a>
<span class="sourceLineNo">345</span> * in parentheses.<a name="line.345"></a>
<span class="sourceLineNo">346</span> *<a name="line.346"></a>
<span class="sourceLineNo">347</span> * @param args Parse tree nodes<a name="line.347"></a>
<span class="sourceLineNo">348</span> * @return Whether nodes need to be enclosed in parentheses<a name="line.348"></a>
<span class="sourceLineNo">349</span> */<a name="line.349"></a>
<span class="sourceLineNo">350</span> private static boolean needParen(List<ParseTreeNode> args) {<a name="line.350"></a>
<span class="sourceLineNo">351</span> return !(args.size() == 1<a name="line.351"></a>
<span class="sourceLineNo">352</span> && args.get(0) instanceof CallNode<a name="line.352"></a>
<span class="sourceLineNo">353</span> && ((CallNode) args.get(0)).getSyntax() == Parentheses);<a name="line.353"></a>
<span class="sourceLineNo">354</span> }<a name="line.354"></a>
<span class="sourceLineNo">355</span><a name="line.355"></a>
<span class="sourceLineNo">356</span> private static void unparseList(<a name="line.356"></a>
<span class="sourceLineNo">357</span> ParseTreeWriter writer,<a name="line.357"></a>
<span class="sourceLineNo">358</span> List<ParseTreeNode> argList,<a name="line.358"></a>
<span class="sourceLineNo">359</span> String start,<a name="line.359"></a>
<span class="sourceLineNo">360</span> String mid,<a name="line.360"></a>
<span class="sourceLineNo">361</span> String end)<a name="line.361"></a>
<span class="sourceLineNo">362</span> {<a name="line.362"></a>
<span class="sourceLineNo">363</span> final PrintWriter pw = writer.getPrintWriter();<a name="line.363"></a>
<span class="sourceLineNo">364</span> pw.print(start);<a name="line.364"></a>
<span class="sourceLineNo">365</span> for (int i = 0; i < argList.size(); i++) {<a name="line.365"></a>
<span class="sourceLineNo">366</span> if (i > 0) {<a name="line.366"></a>
<span class="sourceLineNo">367</span> pw.print(mid);<a name="line.367"></a>
<span class="sourceLineNo">368</span> }<a name="line.368"></a>
<span class="sourceLineNo">369</span> argList.get(i).unparse(writer);<a name="line.369"></a>
<span class="sourceLineNo">370</span> }<a name="line.370"></a>
<span class="sourceLineNo">371</span> pw.print(end);<a name="line.371"></a>
<span class="sourceLineNo">372</span> }<a name="line.372"></a>
<span class="sourceLineNo">373</span>}<a name="line.373"></a>
<span class="sourceLineNo">374</span><a name="line.374"></a>
<span class="sourceLineNo">375</span>// End Syntax.java<a name="line.375"></a>
</pre>
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