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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: FunctionAvailableCall.java 1225364 2011-12-28 22:45:16Z mrglavas $<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 java.lang.reflect.Method;<a name="line.24"></a> |
| <FONT color="green">025</FONT> import java.lang.reflect.Modifier;<a name="line.25"></a> |
| <FONT color="green">026</FONT> import java.util.Vector;<a name="line.26"></a> |
| <FONT color="green">027</FONT> <a name="line.27"></a> |
| <FONT color="green">028</FONT> import org.apache.bcel.generic.ConstantPoolGen;<a name="line.28"></a> |
| <FONT color="green">029</FONT> import org.apache.bcel.generic.PUSH;<a name="line.29"></a> |
| <FONT color="green">030</FONT> import org.apache.xalan.xsltc.compiler.util.ClassGenerator;<a name="line.30"></a> |
| <FONT color="green">031</FONT> import org.apache.xalan.xsltc.compiler.util.ErrorMsg;<a name="line.31"></a> |
| <FONT color="green">032</FONT> import org.apache.xalan.xsltc.compiler.util.MethodGenerator;<a name="line.32"></a> |
| <FONT color="green">033</FONT> import org.apache.xalan.xsltc.compiler.util.Type;<a name="line.33"></a> |
| <FONT color="green">034</FONT> import org.apache.xalan.xsltc.compiler.util.TypeCheckError;<a name="line.34"></a> |
| <FONT color="green">035</FONT> import org.apache.xalan.xsltc.compiler.util.Util;<a name="line.35"></a> |
| <FONT color="green">036</FONT> <a name="line.36"></a> |
| <FONT color="green">037</FONT> /**<a name="line.37"></a> |
| <FONT color="green">038</FONT> * @author G. Todd Miller <a name="line.38"></a> |
| <FONT color="green">039</FONT> * @author Santiago Pericas-Geertsen<a name="line.39"></a> |
| <FONT color="green">040</FONT> */<a name="line.40"></a> |
| <FONT color="green">041</FONT> final class FunctionAvailableCall extends FunctionCall {<a name="line.41"></a> |
| <FONT color="green">042</FONT> <a name="line.42"></a> |
| <FONT color="green">043</FONT> private Expression _arg; <a name="line.43"></a> |
| <FONT color="green">044</FONT> private String _nameOfFunct = null; <a name="line.44"></a> |
| <FONT color="green">045</FONT> private String _namespaceOfFunct = null; <a name="line.45"></a> |
| <FONT color="green">046</FONT> private boolean _isFunctionAvailable = false; <a name="line.46"></a> |
| <FONT color="green">047</FONT> <a name="line.47"></a> |
| <FONT color="green">048</FONT> /**<a name="line.48"></a> |
| <FONT color="green">049</FONT> * Constructs a FunctionAvailableCall FunctionCall. Takes the<a name="line.49"></a> |
| <FONT color="green">050</FONT> * function name qname, for example, 'function-available', and <a name="line.50"></a> |
| <FONT color="green">051</FONT> * a list of arguments where the arguments must be instances of <a name="line.51"></a> |
| <FONT color="green">052</FONT> * LiteralExpression. <a name="line.52"></a> |
| <FONT color="green">053</FONT> */<a name="line.53"></a> |
| <FONT color="green">054</FONT> public FunctionAvailableCall(QName fname, Vector arguments) {<a name="line.54"></a> |
| <FONT color="green">055</FONT> super(fname, arguments);<a name="line.55"></a> |
| <FONT color="green">056</FONT> _arg = (Expression)arguments.elementAt(0);<a name="line.56"></a> |
| <FONT color="green">057</FONT> _type = null; <a name="line.57"></a> |
| <FONT color="green">058</FONT> <a name="line.58"></a> |
| <FONT color="green">059</FONT> if (_arg instanceof LiteralExpr) {<a name="line.59"></a> |
| <FONT color="green">060</FONT> LiteralExpr arg = (LiteralExpr) _arg;<a name="line.60"></a> |
| <FONT color="green">061</FONT> _namespaceOfFunct = arg.getNamespace();<a name="line.61"></a> |
| <FONT color="green">062</FONT> _nameOfFunct = arg.getValue();<a name="line.62"></a> |
| <FONT color="green">063</FONT> <a name="line.63"></a> |
| <FONT color="green">064</FONT> if (!isInternalNamespace()) {<a name="line.64"></a> |
| <FONT color="green">065</FONT> _isFunctionAvailable = hasMethods();<a name="line.65"></a> |
| <FONT color="green">066</FONT> }<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> <a name="line.69"></a> |
| <FONT color="green">070</FONT> /**<a name="line.70"></a> |
| <FONT color="green">071</FONT> * Argument of function-available call must be literal, typecheck<a name="line.71"></a> |
| <FONT color="green">072</FONT> * returns the type of function-available to be boolean. <a name="line.72"></a> |
| <FONT color="green">073</FONT> */<a name="line.73"></a> |
| <FONT color="green">074</FONT> public Type typeCheck(SymbolTable stable) throws TypeCheckError {<a name="line.74"></a> |
| <FONT color="green">075</FONT> if (_type != null) {<a name="line.75"></a> |
| <FONT color="green">076</FONT> return _type;<a name="line.76"></a> |
| <FONT color="green">077</FONT> }<a name="line.77"></a> |
| <FONT color="green">078</FONT> if (_arg instanceof LiteralExpr) {<a name="line.78"></a> |
| <FONT color="green">079</FONT> return _type = Type.Boolean;<a name="line.79"></a> |
| <FONT color="green">080</FONT> }<a name="line.80"></a> |
| <FONT color="green">081</FONT> ErrorMsg err = new ErrorMsg(ErrorMsg.NEED_LITERAL_ERR,<a name="line.81"></a> |
| <FONT color="green">082</FONT> "function-available", this);<a name="line.82"></a> |
| <FONT color="green">083</FONT> throw new TypeCheckError(err);<a name="line.83"></a> |
| <FONT color="green">084</FONT> }<a name="line.84"></a> |
| <FONT color="green">085</FONT> <a name="line.85"></a> |
| <FONT color="green">086</FONT> /**<a name="line.86"></a> |
| <FONT color="green">087</FONT> * Returns an object representing the compile-time evaluation <a name="line.87"></a> |
| <FONT color="green">088</FONT> * of an expression. We are only using this for function-available<a name="line.88"></a> |
| <FONT color="green">089</FONT> * and element-available at this time.<a name="line.89"></a> |
| <FONT color="green">090</FONT> */<a name="line.90"></a> |
| <FONT color="green">091</FONT> public Object evaluateAtCompileTime() {<a name="line.91"></a> |
| <FONT color="green">092</FONT> return getResult() ? Boolean.TRUE : Boolean.FALSE;<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> * for external java functions only: reports on whether or not<a name="line.96"></a> |
| <FONT color="green">097</FONT> * the specified method is found in the specifed class. <a name="line.97"></a> |
| <FONT color="green">098</FONT> */<a name="line.98"></a> |
| <FONT color="green">099</FONT> private boolean hasMethods() {<a name="line.99"></a> |
| <FONT color="green">100</FONT> <a name="line.100"></a> |
| <FONT color="green">101</FONT> // Get the class name from the namespace uri<a name="line.101"></a> |
| <FONT color="green">102</FONT> String className = getClassNameFromUri(_namespaceOfFunct);<a name="line.102"></a> |
| <FONT color="green">103</FONT> <a name="line.103"></a> |
| <FONT color="green">104</FONT> // Get the method name from the argument to function-available<a name="line.104"></a> |
| <FONT color="green">105</FONT> String methodName = null;<a name="line.105"></a> |
| <FONT color="green">106</FONT> int colonIndex = _nameOfFunct.indexOf(":");<a name="line.106"></a> |
| <FONT color="green">107</FONT> if (colonIndex > 0) {<a name="line.107"></a> |
| <FONT color="green">108</FONT> String functionName = _nameOfFunct.substring(colonIndex+1);<a name="line.108"></a> |
| <FONT color="green">109</FONT> int lastDotIndex = functionName.lastIndexOf('.');<a name="line.109"></a> |
| <FONT color="green">110</FONT> if (lastDotIndex > 0) {<a name="line.110"></a> |
| <FONT color="green">111</FONT> methodName = functionName.substring(lastDotIndex+1);<a name="line.111"></a> |
| <FONT color="green">112</FONT> if (className != null && className.length() != 0)<a name="line.112"></a> |
| <FONT color="green">113</FONT> className = className + "." + functionName.substring(0, lastDotIndex);<a name="line.113"></a> |
| <FONT color="green">114</FONT> else<a name="line.114"></a> |
| <FONT color="green">115</FONT> className = functionName.substring(0, lastDotIndex);<a name="line.115"></a> |
| <FONT color="green">116</FONT> }<a name="line.116"></a> |
| <FONT color="green">117</FONT> else<a name="line.117"></a> |
| <FONT color="green">118</FONT> methodName = functionName;<a name="line.118"></a> |
| <FONT color="green">119</FONT> }<a name="line.119"></a> |
| <FONT color="green">120</FONT> else<a name="line.120"></a> |
| <FONT color="green">121</FONT> methodName = _nameOfFunct;<a name="line.121"></a> |
| <FONT color="green">122</FONT> <a name="line.122"></a> |
| <FONT color="green">123</FONT> if (className == null || methodName == null) {<a name="line.123"></a> |
| <FONT color="green">124</FONT> return false;<a name="line.124"></a> |
| <FONT color="green">125</FONT> }<a name="line.125"></a> |
| <FONT color="green">126</FONT> <a name="line.126"></a> |
| <FONT color="green">127</FONT> // Replace the '-' characters in the method name<a name="line.127"></a> |
| <FONT color="green">128</FONT> if (methodName.indexOf('-') > 0)<a name="line.128"></a> |
| <FONT color="green">129</FONT> methodName = replaceDash(methodName);<a name="line.129"></a> |
| <FONT color="green">130</FONT> <a name="line.130"></a> |
| <FONT color="green">131</FONT> try {<a name="line.131"></a> |
| <FONT color="green">132</FONT> final Class clazz = ObjectFactory.findProviderClass(<a name="line.132"></a> |
| <FONT color="green">133</FONT> className, ObjectFactory.findClassLoader(), true);<a name="line.133"></a> |
| <FONT color="green">134</FONT> <a name="line.134"></a> |
| <FONT color="green">135</FONT> if (clazz == null) {<a name="line.135"></a> |
| <FONT color="green">136</FONT> return false;<a name="line.136"></a> |
| <FONT color="green">137</FONT> }<a name="line.137"></a> |
| <FONT color="green">138</FONT> <a name="line.138"></a> |
| <FONT color="green">139</FONT> final Method[] methods = clazz.getMethods();<a name="line.139"></a> |
| <FONT color="green">140</FONT> <a name="line.140"></a> |
| <FONT color="green">141</FONT> for (int i = 0; i < methods.length; i++) {<a name="line.141"></a> |
| <FONT color="green">142</FONT> final int mods = methods[i].getModifiers();<a name="line.142"></a> |
| <FONT color="green">143</FONT> <a name="line.143"></a> |
| <FONT color="green">144</FONT> if (Modifier.isPublic(mods) && Modifier.isStatic(mods)<a name="line.144"></a> |
| <FONT color="green">145</FONT> && methods[i].getName().equals(methodName))<a name="line.145"></a> |
| <FONT color="green">146</FONT> {<a name="line.146"></a> |
| <FONT color="green">147</FONT> return true;<a name="line.147"></a> |
| <FONT color="green">148</FONT> }<a name="line.148"></a> |
| <FONT color="green">149</FONT> }<a name="line.149"></a> |
| <FONT color="green">150</FONT> }<a name="line.150"></a> |
| <FONT color="green">151</FONT> catch (ClassNotFoundException e) {<a name="line.151"></a> |
| <FONT color="green">152</FONT> return false;<a name="line.152"></a> |
| <FONT color="green">153</FONT> }<a name="line.153"></a> |
| <FONT color="green">154</FONT> return false; <a name="line.154"></a> |
| <FONT color="green">155</FONT> }<a name="line.155"></a> |
| <FONT color="green">156</FONT> <a name="line.156"></a> |
| <FONT color="green">157</FONT> /**<a name="line.157"></a> |
| <FONT color="green">158</FONT> * Reports on whether the function specified in the argument to<a name="line.158"></a> |
| <FONT color="green">159</FONT> * xslt function 'function-available' was found.<a name="line.159"></a> |
| <FONT color="green">160</FONT> */<a name="line.160"></a> |
| <FONT color="green">161</FONT> public boolean getResult() {<a name="line.161"></a> |
| <FONT color="green">162</FONT> if (_nameOfFunct == null) { <a name="line.162"></a> |
| <FONT color="green">163</FONT> return false;<a name="line.163"></a> |
| <FONT color="green">164</FONT> }<a name="line.164"></a> |
| <FONT color="green">165</FONT> <a name="line.165"></a> |
| <FONT color="green">166</FONT> if (isInternalNamespace()) {<a name="line.166"></a> |
| <FONT color="green">167</FONT> final Parser parser = getParser();<a name="line.167"></a> |
| <FONT color="green">168</FONT> _isFunctionAvailable = <a name="line.168"></a> |
| <FONT color="green">169</FONT> parser.functionSupported(Util.getLocalName(_nameOfFunct));<a name="line.169"></a> |
| <FONT color="green">170</FONT> }<a name="line.170"></a> |
| <FONT color="green">171</FONT> return _isFunctionAvailable;<a name="line.171"></a> |
| <FONT color="green">172</FONT> }<a name="line.172"></a> |
| <FONT color="green">173</FONT> <a name="line.173"></a> |
| <FONT color="green">174</FONT> /**<a name="line.174"></a> |
| <FONT color="green">175</FONT> * Return true if the namespace uri is null or it is the XSLTC translet uri.<a name="line.175"></a> |
| <FONT color="green">176</FONT> */<a name="line.176"></a> |
| <FONT color="green">177</FONT> private boolean isInternalNamespace() {<a name="line.177"></a> |
| <FONT color="green">178</FONT> return (_namespaceOfFunct == null ||<a name="line.178"></a> |
| <FONT color="green">179</FONT> _namespaceOfFunct.equals(EMPTYSTRING) ||<a name="line.179"></a> |
| <FONT color="green">180</FONT> _namespaceOfFunct.equals(TRANSLET_URI));<a name="line.180"></a> |
| <FONT color="green">181</FONT> }<a name="line.181"></a> |
| <FONT color="green">182</FONT> <a name="line.182"></a> |
| <FONT color="green">183</FONT> /**<a name="line.183"></a> |
| <FONT color="green">184</FONT> * Calls to 'function-available' are resolved at compile time since <a name="line.184"></a> |
| <FONT color="green">185</FONT> * the namespaces declared in the stylsheet are not available at run<a name="line.185"></a> |
| <FONT color="green">186</FONT> * time. Consequently, arguments to this function must be literals.<a name="line.186"></a> |
| <FONT color="green">187</FONT> */<a name="line.187"></a> |
| <FONT color="green">188</FONT> public void translate(ClassGenerator classGen, MethodGenerator methodGen) {<a name="line.188"></a> |
| <FONT color="green">189</FONT> final ConstantPoolGen cpg = classGen.getConstantPool();<a name="line.189"></a> |
| <FONT color="green">190</FONT> methodGen.getInstructionList().append(new PUSH(cpg, getResult()));<a name="line.190"></a> |
| <FONT color="green">191</FONT> }<a name="line.191"></a> |
| <FONT color="green">192</FONT> <a name="line.192"></a> |
| <FONT color="green">193</FONT> }<a name="line.193"></a> |
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