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| <FONT color="green">001</FONT> /*<a name="line.1"></a> |
| <FONT color="green">002</FONT> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <FONT color="green">003</FONT> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <FONT color="green">004</FONT> * distributed with this work for additional information<a name="line.4"></a> |
| <FONT color="green">005</FONT> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <FONT color="green">006</FONT> * to you under the Apache License, Version 2.0 (the "License");<a name="line.6"></a> |
| <FONT color="green">007</FONT> * you may not use this file except in compliance with the License.<a name="line.7"></a> |
| <FONT color="green">008</FONT> * You may obtain a copy of the License at<a name="line.8"></a> |
| <FONT color="green">009</FONT> *<a name="line.9"></a> |
| <FONT color="green">010</FONT> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <FONT color="green">011</FONT> *<a name="line.11"></a> |
| <FONT color="green">012</FONT> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <FONT color="green">013</FONT> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <FONT color="green">014</FONT> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <FONT color="green">015</FONT> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <FONT color="green">016</FONT> * limitations under the License.<a name="line.16"></a> |
| <FONT color="green">017</FONT> */<a name="line.17"></a> |
| <FONT color="green">018</FONT> /*<a name="line.18"></a> |
| <FONT color="green">019</FONT> * $Id: If.java 468650 2006-10-28 07:03:30Z minchau $<a name="line.19"></a> |
| <FONT color="green">020</FONT> */<a name="line.20"></a> |
| <FONT color="green">021</FONT> <a name="line.21"></a> |
| <FONT color="green">022</FONT> package org.apache.xalan.xsltc.compiler;<a name="line.22"></a> |
| <FONT color="green">023</FONT> <a name="line.23"></a> |
| <FONT color="green">024</FONT> import org.apache.bcel.generic.InstructionHandle;<a name="line.24"></a> |
| <FONT color="green">025</FONT> import org.apache.bcel.generic.InstructionList;<a name="line.25"></a> |
| <FONT color="green">026</FONT> import org.apache.xalan.xsltc.compiler.util.BooleanType;<a name="line.26"></a> |
| <FONT color="green">027</FONT> import org.apache.xalan.xsltc.compiler.util.ClassGenerator;<a name="line.27"></a> |
| <FONT color="green">028</FONT> import org.apache.xalan.xsltc.compiler.util.ErrorMsg;<a name="line.28"></a> |
| <FONT color="green">029</FONT> import org.apache.xalan.xsltc.compiler.util.MethodGenerator;<a name="line.29"></a> |
| <FONT color="green">030</FONT> import org.apache.xalan.xsltc.compiler.util.Type;<a name="line.30"></a> |
| <FONT color="green">031</FONT> import org.apache.xalan.xsltc.compiler.util.TypeCheckError;<a name="line.31"></a> |
| <FONT color="green">032</FONT> import org.apache.xalan.xsltc.compiler.util.Util;<a name="line.32"></a> |
| <FONT color="green">033</FONT> <a name="line.33"></a> |
| <FONT color="green">034</FONT> /**<a name="line.34"></a> |
| <FONT color="green">035</FONT> * @author Jacek Ambroziak<a name="line.35"></a> |
| <FONT color="green">036</FONT> * @author Santiago Pericas-Geertsen<a name="line.36"></a> |
| <FONT color="green">037</FONT> * @author Morten Jorgensen<a name="line.37"></a> |
| <FONT color="green">038</FONT> */<a name="line.38"></a> |
| <FONT color="green">039</FONT> final class If extends Instruction {<a name="line.39"></a> |
| <FONT color="green">040</FONT> <a name="line.40"></a> |
| <FONT color="green">041</FONT> private Expression _test;<a name="line.41"></a> |
| <FONT color="green">042</FONT> private boolean _ignore = false;<a name="line.42"></a> |
| <FONT color="green">043</FONT> <a name="line.43"></a> |
| <FONT color="green">044</FONT> /**<a name="line.44"></a> |
| <FONT color="green">045</FONT> * Display the contents of this element<a name="line.45"></a> |
| <FONT color="green">046</FONT> */<a name="line.46"></a> |
| <FONT color="green">047</FONT> public void display(int indent) {<a name="line.47"></a> |
| <FONT color="green">048</FONT> indent(indent);<a name="line.48"></a> |
| <FONT color="green">049</FONT> Util.println("If");<a name="line.49"></a> |
| <FONT color="green">050</FONT> indent(indent + IndentIncrement);<a name="line.50"></a> |
| <FONT color="green">051</FONT> System.out.print("test ");<a name="line.51"></a> |
| <FONT color="green">052</FONT> Util.println(_test.toString());<a name="line.52"></a> |
| <FONT color="green">053</FONT> displayContents(indent + IndentIncrement);<a name="line.53"></a> |
| <FONT color="green">054</FONT> }<a name="line.54"></a> |
| <FONT color="green">055</FONT> <a name="line.55"></a> |
| <FONT color="green">056</FONT> /**<a name="line.56"></a> |
| <FONT color="green">057</FONT> * Parse the "test" expression and contents of this element.<a name="line.57"></a> |
| <FONT color="green">058</FONT> */<a name="line.58"></a> |
| <FONT color="green">059</FONT> public void parseContents(Parser parser) {<a name="line.59"></a> |
| <FONT color="green">060</FONT> // Parse the "test" expression<a name="line.60"></a> |
| <FONT color="green">061</FONT> _test = parser.parseExpression(this, "test", null);<a name="line.61"></a> |
| <FONT color="green">062</FONT> <a name="line.62"></a> |
| <FONT color="green">063</FONT> // Make sure required attribute(s) have been set<a name="line.63"></a> |
| <FONT color="green">064</FONT> if (_test.isDummy()) {<a name="line.64"></a> |
| <FONT color="green">065</FONT> reportError(this, parser, ErrorMsg.REQUIRED_ATTR_ERR, "test");<a name="line.65"></a> |
| <FONT color="green">066</FONT> return;<a name="line.66"></a> |
| <FONT color="green">067</FONT> }<a name="line.67"></a> |
| <FONT color="green">068</FONT> <a name="line.68"></a> |
| <FONT color="green">069</FONT> // Ignore xsl:if when test is false (function-available() and<a name="line.69"></a> |
| <FONT color="green">070</FONT> // element-available())<a name="line.70"></a> |
| <FONT color="green">071</FONT> Object result = _test.evaluateAtCompileTime();<a name="line.71"></a> |
| <FONT color="green">072</FONT> if (result != null && result instanceof Boolean) {<a name="line.72"></a> |
| <FONT color="green">073</FONT> _ignore = !((Boolean) result).booleanValue();<a name="line.73"></a> |
| <FONT color="green">074</FONT> }<a name="line.74"></a> |
| <FONT color="green">075</FONT> <a name="line.75"></a> |
| <FONT color="green">076</FONT> parseChildren(parser);<a name="line.76"></a> |
| <FONT color="green">077</FONT> }<a name="line.77"></a> |
| <FONT color="green">078</FONT> <a name="line.78"></a> |
| <FONT color="green">079</FONT> /**<a name="line.79"></a> |
| <FONT color="green">080</FONT> * Type-check the "test" expression and contents of this element.<a name="line.80"></a> |
| <FONT color="green">081</FONT> * The contents will be ignored if we know the test will always fail.<a name="line.81"></a> |
| <FONT color="green">082</FONT> */<a name="line.82"></a> |
| <FONT color="green">083</FONT> public Type typeCheck(SymbolTable stable) throws TypeCheckError {<a name="line.83"></a> |
| <FONT color="green">084</FONT> // Type-check the "test" expression<a name="line.84"></a> |
| <FONT color="green">085</FONT> if (_test.typeCheck(stable) instanceof BooleanType == false) {<a name="line.85"></a> |
| <FONT color="green">086</FONT> _test = new CastExpr(_test, Type.Boolean);<a name="line.86"></a> |
| <FONT color="green">087</FONT> }<a name="line.87"></a> |
| <FONT color="green">088</FONT> // Type check the element contents<a name="line.88"></a> |
| <FONT color="green">089</FONT> if (!_ignore) {<a name="line.89"></a> |
| <FONT color="green">090</FONT> typeCheckContents(stable);<a name="line.90"></a> |
| <FONT color="green">091</FONT> }<a name="line.91"></a> |
| <FONT color="green">092</FONT> return Type.Void;<a name="line.92"></a> |
| <FONT color="green">093</FONT> }<a name="line.93"></a> |
| <FONT color="green">094</FONT> <a name="line.94"></a> |
| <FONT color="green">095</FONT> /**<a name="line.95"></a> |
| <FONT color="green">096</FONT> * Translate the "test" expression and contents of this element.<a name="line.96"></a> |
| <FONT color="green">097</FONT> * The contents will be ignored if we know the test will always fail.<a name="line.97"></a> |
| <FONT color="green">098</FONT> */<a name="line.98"></a> |
| <FONT color="green">099</FONT> public void translate(ClassGenerator classGen, MethodGenerator methodGen) {<a name="line.99"></a> |
| <FONT color="green">100</FONT> final InstructionList il = methodGen.getInstructionList();<a name="line.100"></a> |
| <FONT color="green">101</FONT> _test.translateDesynthesized(classGen, methodGen);<a name="line.101"></a> |
| <FONT color="green">102</FONT> // remember end of condition<a name="line.102"></a> |
| <FONT color="green">103</FONT> final InstructionHandle truec = il.getEnd();<a name="line.103"></a> |
| <FONT color="green">104</FONT> if (!_ignore) {<a name="line.104"></a> |
| <FONT color="green">105</FONT> translateContents(classGen, methodGen);<a name="line.105"></a> |
| <FONT color="green">106</FONT> }<a name="line.106"></a> |
| <FONT color="green">107</FONT> _test.backPatchFalseList(il.append(NOP));<a name="line.107"></a> |
| <FONT color="green">108</FONT> _test.backPatchTrueList(truec.getNext());<a name="line.108"></a> |
| <FONT color="green">109</FONT> }<a name="line.109"></a> |
| <FONT color="green">110</FONT> }<a name="line.110"></a> |
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| </PRE> |
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