1 /*
   2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
   3  */
   4 /*
   5  * Licensed to the Apache Software Foundation (ASF) under one or more
   6  * contributor license agreements.  See the NOTICE file distributed with
   7  * this work for additional information regarding copyright ownership.
   8  * The ASF licenses this file to You under the Apache License, Version 2.0
   9  * (the "License"); you may not use this file except in compliance with
  10  * the License.  You may obtain a copy of the License at
  11  *
  12  *      http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing, software
  15  * distributed under the License is distributed on an "AS IS" BASIS,
  16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  * See the License for the specific language governing permissions and
  18  * limitations under the License.
  19  */
  20 
  21 package com.sun.org.apache.xalan.internal.xsltc.compiler;
  22 
  23 import com.sun.org.apache.bcel.internal.generic.InstructionList;
  24 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
  25 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
  26 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
  27 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
  28 import java.util.List;
  29 
  30 /**
  31  * @author Jacek Ambroziak
  32  * @author Santiago Pericas-Geertsen
  33  * @LastModified: Oct 2017
  34  */
  35 final class NumberCall extends FunctionCall {
  36 
  37     public NumberCall(QName fname, List<Expression> arguments) {
  38         super(fname, arguments);
  39     }
  40 
  41     public Type typeCheck(SymbolTable stable) throws TypeCheckError {
  42         if (argumentCount() > 0) {
  43             argument().typeCheck(stable);
  44         }
  45         return _type = Type.Real;
  46     }
  47 
  48     public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
  49         final InstructionList il = methodGen.getInstructionList();
  50         Type targ;
  51 
  52         if (argumentCount() == 0) {
  53             il.append(methodGen.loadContextNode());
  54             targ = Type.Node;
  55         }
  56         else {
  57             final Expression arg = argument();
  58             arg.translate(classGen, methodGen);
  59             arg.startIterator(classGen, methodGen);
  60             targ = arg.getType();
  61         }
  62 
  63         if (!targ.identicalTo(Type.Real)) {
  64             targ.translateTo(classGen, methodGen, Type.Real);
  65         }
  66     }
  67 }