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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: ObjectType.java 468649 2006-10-28 07:00:55Z 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.util;<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.ALOAD;<a name="line.24"></a>
<FONT color="green">025</FONT> import org.apache.bcel.generic.ASTORE;<a name="line.25"></a>
<FONT color="green">026</FONT> import org.apache.bcel.generic.BranchHandle;<a name="line.26"></a>
<FONT color="green">027</FONT> import org.apache.bcel.generic.ConstantPoolGen;<a name="line.27"></a>
<FONT color="green">028</FONT> import org.apache.bcel.generic.GOTO;<a name="line.28"></a>
<FONT color="green">029</FONT> import org.apache.bcel.generic.IFNULL;<a name="line.29"></a>
<FONT color="green">030</FONT> import org.apache.bcel.generic.INVOKEVIRTUAL;<a name="line.30"></a>
<FONT color="green">031</FONT> import org.apache.bcel.generic.Instruction;<a name="line.31"></a>
<FONT color="green">032</FONT> import org.apache.bcel.generic.InstructionList;<a name="line.32"></a>
<FONT color="green">033</FONT> import org.apache.bcel.generic.PUSH;<a name="line.33"></a>
<FONT color="green">034</FONT> import org.apache.xalan.xsltc.compiler.Constants;<a name="line.34"></a>
<FONT color="green">035</FONT> <a name="line.35"></a>
<FONT color="green">036</FONT> /**<a name="line.36"></a>
<FONT color="green">037</FONT> * @author Todd Miller<a name="line.37"></a>
<FONT color="green">038</FONT> * @author Santiago Pericas-Geertsen<a name="line.38"></a>
<FONT color="green">039</FONT> */<a name="line.39"></a>
<FONT color="green">040</FONT> public final class ObjectType extends Type {<a name="line.40"></a>
<FONT color="green">041</FONT> <a name="line.41"></a>
<FONT color="green">042</FONT> private String _javaClassName = "java.lang.Object";<a name="line.42"></a>
<FONT color="green">043</FONT> private Class _clazz = java.lang.Object.class;<a name="line.43"></a>
<FONT color="green">044</FONT> <a name="line.44"></a>
<FONT color="green">045</FONT> /**<a name="line.45"></a>
<FONT color="green">046</FONT> * Used to represent a Java Class type such is required to support <a name="line.46"></a>
<FONT color="green">047</FONT> * non-static java functions. <a name="line.47"></a>
<FONT color="green">048</FONT> * @param javaClassName name of the class such as 'com.foo.Processor'<a name="line.48"></a>
<FONT color="green">049</FONT> */<a name="line.49"></a>
<FONT color="green">050</FONT> protected ObjectType(String javaClassName) {<a name="line.50"></a>
<FONT color="green">051</FONT> _javaClassName = javaClassName;<a name="line.51"></a>
<FONT color="green">052</FONT> <a name="line.52"></a>
<FONT color="green">053</FONT> try {<a name="line.53"></a>
<FONT color="green">054</FONT> _clazz = ObjectFactory.findProviderClass(<a name="line.54"></a>
<FONT color="green">055</FONT> javaClassName, ObjectFactory.findClassLoader(), true);<a name="line.55"></a>
<FONT color="green">056</FONT> }<a name="line.56"></a>
<FONT color="green">057</FONT> catch (ClassNotFoundException e) {<a name="line.57"></a>
<FONT color="green">058</FONT> _clazz = null;<a name="line.58"></a>
<FONT color="green">059</FONT> }<a name="line.59"></a>
<FONT color="green">060</FONT> }<a name="line.60"></a>
<FONT color="green">061</FONT> <a name="line.61"></a>
<FONT color="green">062</FONT> protected ObjectType(Class clazz) {<a name="line.62"></a>
<FONT color="green">063</FONT> _clazz = clazz;<a name="line.63"></a>
<FONT color="green">064</FONT> _javaClassName = clazz.getName(); <a name="line.64"></a>
<FONT color="green">065</FONT> }<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> * Must return the same value for all ObjectType instances. This is<a name="line.68"></a>
<FONT color="green">069</FONT> * needed in CastExpr to ensure the mapping table is used correctly.<a name="line.69"></a>
<FONT color="green">070</FONT> */<a name="line.70"></a>
<FONT color="green">071</FONT> public int hashCode() {<a name="line.71"></a>
<FONT color="green">072</FONT> return java.lang.Object.class.hashCode();<a name="line.72"></a>
<FONT color="green">073</FONT> }<a name="line.73"></a>
<FONT color="green">074</FONT> <a name="line.74"></a>
<FONT color="green">075</FONT> public boolean equals(Object obj) {<a name="line.75"></a>
<FONT color="green">076</FONT> return (obj instanceof ObjectType);<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> public String getJavaClassName() {<a name="line.79"></a>
<FONT color="green">080</FONT> return _javaClassName;<a name="line.80"></a>
<FONT color="green">081</FONT> }<a name="line.81"></a>
<FONT color="green">082</FONT> <a name="line.82"></a>
<FONT color="green">083</FONT> public Class getJavaClass() {<a name="line.83"></a>
<FONT color="green">084</FONT> return _clazz; <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> public String toString() {<a name="line.87"></a>
<FONT color="green">088</FONT> return _javaClassName;<a name="line.88"></a>
<FONT color="green">089</FONT> }<a name="line.89"></a>
<FONT color="green">090</FONT> <a name="line.90"></a>
<FONT color="green">091</FONT> public boolean identicalTo(Type other) {<a name="line.91"></a>
<FONT color="green">092</FONT> return this == other;<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> public String toSignature() {<a name="line.95"></a>
<FONT color="green">096</FONT> final StringBuffer result = new StringBuffer("L");<a name="line.96"></a>
<FONT color="green">097</FONT> result.append(_javaClassName.replace('.', '/')).append(';');<a name="line.97"></a>
<FONT color="green">098</FONT> return result.toString();<a name="line.98"></a>
<FONT color="green">099</FONT> }<a name="line.99"></a>
<FONT color="green">100</FONT> <a name="line.100"></a>
<FONT color="green">101</FONT> public org.apache.bcel.generic.Type toJCType() {<a name="line.101"></a>
<FONT color="green">102</FONT> return Util.getJCRefType(toSignature());<a name="line.102"></a>
<FONT color="green">103</FONT> }<a name="line.103"></a>
<FONT color="green">104</FONT> <a name="line.104"></a>
<FONT color="green">105</FONT> /**<a name="line.105"></a>
<FONT color="green">106</FONT> * Translates a void into an object of internal type &lt;code&gt;type&lt;/code&gt;.<a name="line.106"></a>
<FONT color="green">107</FONT> * This translation is needed when calling external functions<a name="line.107"></a>
<FONT color="green">108</FONT> * that return void.<a name="line.108"></a>
<FONT color="green">109</FONT> *<a name="line.109"></a>
<FONT color="green">110</FONT> * @see org.apache.xalan.xsltc.compiler.util.Type#translateTo<a name="line.110"></a>
<FONT color="green">111</FONT> */<a name="line.111"></a>
<FONT color="green">112</FONT> public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, <a name="line.112"></a>
<FONT color="green">113</FONT> Type type) {<a name="line.113"></a>
<FONT color="green">114</FONT> if (type == Type.String) {<a name="line.114"></a>
<FONT color="green">115</FONT> translateTo(classGen, methodGen, (StringType) type);<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> ErrorMsg err = new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR,<a name="line.118"></a>
<FONT color="green">119</FONT> toString(), type.toString());<a name="line.119"></a>
<FONT color="green">120</FONT> classGen.getParser().reportError(Constants.FATAL, err);<a name="line.120"></a>
<FONT color="green">121</FONT> }<a name="line.121"></a>
<FONT color="green">122</FONT> }<a name="line.122"></a>
<FONT color="green">123</FONT> <a name="line.123"></a>
<FONT color="green">124</FONT> /**<a name="line.124"></a>
<FONT color="green">125</FONT> * Expects an integer on the stack and pushes its string value by calling<a name="line.125"></a>
<FONT color="green">126</FONT> * &lt;code&gt;Integer.toString(int i)&lt;/code&gt;.<a name="line.126"></a>
<FONT color="green">127</FONT> *<a name="line.127"></a>
<FONT color="green">128</FONT> * @see org.apache.xalan.xsltc.compiler.util.Type#translateTo<a name="line.128"></a>
<FONT color="green">129</FONT> */<a name="line.129"></a>
<FONT color="green">130</FONT> public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, <a name="line.130"></a>
<FONT color="green">131</FONT> StringType type) {<a name="line.131"></a>
<FONT color="green">132</FONT> final ConstantPoolGen cpg = classGen.getConstantPool();<a name="line.132"></a>
<FONT color="green">133</FONT> final InstructionList il = methodGen.getInstructionList();<a name="line.133"></a>
<FONT color="green">134</FONT> <a name="line.134"></a>
<FONT color="green">135</FONT> il.append(DUP);<a name="line.135"></a>
<FONT color="green">136</FONT> final BranchHandle ifNull = il.append(new IFNULL(null));<a name="line.136"></a>
<FONT color="green">137</FONT> il.append(new INVOKEVIRTUAL(cpg.addMethodref(_javaClassName,<a name="line.137"></a>
<FONT color="green">138</FONT> "toString",<a name="line.138"></a>
<FONT color="green">139</FONT> "()" + STRING_SIG)));<a name="line.139"></a>
<FONT color="green">140</FONT> final BranchHandle gotobh = il.append(new GOTO(null));<a name="line.140"></a>
<FONT color="green">141</FONT> ifNull.setTarget(il.append(POP));<a name="line.141"></a>
<FONT color="green">142</FONT> il.append(new PUSH(cpg, ""));<a name="line.142"></a>
<FONT color="green">143</FONT> gotobh.setTarget(il.append(NOP));<a name="line.143"></a>
<FONT color="green">144</FONT> }<a name="line.144"></a>
<FONT color="green">145</FONT> <a name="line.145"></a>
<FONT color="green">146</FONT> /**<a name="line.146"></a>
<FONT color="green">147</FONT> * Translates an object of this type to the external (Java) type denoted<a name="line.147"></a>
<FONT color="green">148</FONT> * by &lt;code&gt;clazz&lt;/code&gt;. This method is used to translate parameters <a name="line.148"></a>
<FONT color="green">149</FONT> * when external functions are called.<a name="line.149"></a>
<FONT color="green">150</FONT> */ <a name="line.150"></a>
<FONT color="green">151</FONT> public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, <a name="line.151"></a>
<FONT color="green">152</FONT> Class clazz) {<a name="line.152"></a>
<FONT color="green">153</FONT> if (clazz.isAssignableFrom(_clazz))<a name="line.153"></a>
<FONT color="green">154</FONT> methodGen.getInstructionList().append(NOP);<a name="line.154"></a>
<FONT color="green">155</FONT> else {<a name="line.155"></a>
<FONT color="green">156</FONT> ErrorMsg err = new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR,<a name="line.156"></a>
<FONT color="green">157</FONT> toString(), clazz.getClass().toString());<a name="line.157"></a>
<FONT color="green">158</FONT> classGen.getParser().reportError(Constants.FATAL, err); <a name="line.158"></a>
<FONT color="green">159</FONT> }<a name="line.159"></a>
<FONT color="green">160</FONT> }<a name="line.160"></a>
<FONT color="green">161</FONT> <a name="line.161"></a>
<FONT color="green">162</FONT> /**<a name="line.162"></a>
<FONT color="green">163</FONT> * Translates an external Java type into an Object type <a name="line.163"></a>
<FONT color="green">164</FONT> */<a name="line.164"></a>
<FONT color="green">165</FONT> public void translateFrom(ClassGenerator classGen, <a name="line.165"></a>
<FONT color="green">166</FONT> MethodGenerator methodGen, Class clazz) {<a name="line.166"></a>
<FONT color="green">167</FONT> methodGen.getInstructionList().append(NOP);<a name="line.167"></a>
<FONT color="green">168</FONT> }<a name="line.168"></a>
<FONT color="green">169</FONT> <a name="line.169"></a>
<FONT color="green">170</FONT> public Instruction LOAD(int slot) {<a name="line.170"></a>
<FONT color="green">171</FONT> return new ALOAD(slot);<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> public Instruction STORE(int slot) {<a name="line.174"></a>
<FONT color="green">175</FONT> return new ASTORE(slot);<a name="line.175"></a>
<FONT color="green">176</FONT> }<a name="line.176"></a>
<FONT color="green">177</FONT> }<a name="line.177"></a>
</PRE>
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