code: /*
   * 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.INVOKESTATIC;
  import org.apache.bcel.generic.INVOKEVIRTUAL;
  import org.apache.bcel.generic.InstructionList;
  import org.apache.bcel.generic.PUSH;
  import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
  import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
  import org.apache.xalan.xsltc.compiler.util.RealType;
  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 Jacek Ambroziak
   * @author Santiago Pericas-Geertsen
   * @author Morten Jorgensen
   */
  final class FormatNumberCall extends FunctionCall {
      private Expression _value;
      private Expression _format;
      private Expression _name;
      private QName      _resolvedQName = null;
  
      public FormatNumberCall(QName fname, Vector arguments) {
  	super(fname, arguments);
  	_value = argument(0);
  	_format = argument(1);
  	_name = argumentCount() == 3 ? argument(2) : null;
      }
  
      public Type typeCheck(SymbolTable stable) throws TypeCheckError {
  
  	// Inform stylesheet to instantiate a DecimalFormat object
  	getStylesheet().numberFormattingUsed();
  
  	final Type tvalue = _value.typeCheck(stable);
  	if (tvalue instanceof RealType == false) {
  	    _value = new CastExpr(_value, Type.Real);
  	}
  	final Type tformat = _format.typeCheck(stable);
  	if (tformat instanceof StringType == false) {
  	    _format = new CastExpr(_format, Type.String);
  	}
  	if (argumentCount() == 3) {
  	    final Type tname = _name.typeCheck(stable);
  
  	    if (_name instanceof LiteralExpr) {
  		final LiteralExpr literal = (LiteralExpr) _name;
  		_resolvedQName = 
  		    getParser().getQNameIgnoreDefaultNs(literal.getValue());
  	    }
  	    else if (tname instanceof StringType == false) {
  		_name = new CastExpr(_name, Type.String);
  	    }
  	}
  	return _type = Type.String;
      }
      
      public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
  	final ConstantPoolGen cpg = classGen.getConstantPool();
  	final InstructionList il = methodGen.getInstructionList();
  
  	_value.translate(classGen, methodGen);
  	_format.translate(classGen, methodGen);
  
  	final int fn3arg = cpg.addMethodref(BASIS_LIBRARY_CLASS,
  					    "formatNumber",
  					    "(DLjava/lang/String;"+
  					    "Ljava/text/DecimalFormat;)"+
  					    "Ljava/lang/String;");
  	final int get = cpg.addMethodref(TRANSLET_CLASS,
  					 "getDecimalFormat",
  					 "(Ljava/lang/String;)"+
  					 "Ljava/text/DecimalFormat;");
  	
  	il.append(classGen.loadTranslet());
  	if (_name == null) {
  	    il.append(new PUSH(cpg, EMPTYSTRING));
  	}
  	else if (_resolvedQName != null) {
  	    il.append(new PUSH(cpg, _resolvedQName.toString()));
  	}
  	else {
  	    _name.translate(classGen, methodGen);
  	}
  	il.append(new INVOKEVIRTUAL(get));
  	il.append(new INVOKESTATIC(fn3arg));
      }
  }
  