| /* |
| * 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. |
| */ |
| /* |
| * $Id$ |
| */ |
| |
| 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)); |
| } |
| } |