/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* $Id: LangCall.java 468650 2006-10-28 07:03:30Z minchau $
*/
package org.apache.xalan.xsltc.compiler;
import java.util.Vector;
import org.apache.bcel.generic.ConstantPoolGen;
import org.apache.bcel.generic.ILOAD;
import org.apache.bcel.generic.INVOKESTATIC;
import org.apache.bcel.generic.InstructionList;
import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
import org.apache.xalan.xsltc.compiler.util.FilterGenerator;
import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
import org.apache.xalan.xsltc.compiler.util.StringType;
import org.apache.xalan.xsltc.compiler.util.Type;
import org.apache.xalan.xsltc.compiler.util.TypeCheckError;
/**
* @author Morten Jorgensen
*/
final class LangCall extends FunctionCall {
private Expression _lang;
private Type _langType;
/**
* Get the parameters passed to function:
* lang(string)
*/
public LangCall(QName fname, Vector arguments) {
super(fname, arguments);
_lang = argument(0);
}
/**
*
*/
public Type typeCheck(SymbolTable stable) throws TypeCheckError {
_langType = _lang.typeCheck(stable);
if (!(_langType instanceof StringType)) {
_lang = new CastExpr(_lang, Type.String);
}
return Type.Boolean;
}
/**
*
*/
public Type getType() {
return(Type.Boolean);
}
/**
* This method is called when the constructor is compiled in
* Stylesheet.compileConstructor() and not as the syntax tree is traversed.
*/
public void translate(ClassGenerator classGen,
MethodGenerator methodGen) {
final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
final int tst = cpg.addMethodref(BASIS_LIBRARY_CLASS,
"testLanguage",
"("+STRING_SIG+DOM_INTF_SIG+"I)Z");
_lang.translate(classGen,methodGen);
il.append(methodGen.loadDOM());
if (classGen instanceof FilterGenerator)
il.append(new ILOAD(1));
else
il.append(methodGen.loadContextNode());
il.append(new INVOKESTATIC(tst));
}
}