001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements. See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership. The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the  "License");
007     * you may not use this file except in compliance with the License.
008     * You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    /*
019     * $Id: NumberCall.java 468650 2006-10-28 07:03:30Z minchau $
020     */
021    
022    package org.apache.xalan.xsltc.compiler;
023    
024    import java.util.Vector;
025    
026    import org.apache.bcel.generic.InstructionList;
027    import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
028    import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
029    import org.apache.xalan.xsltc.compiler.util.Type;
030    import org.apache.xalan.xsltc.compiler.util.TypeCheckError;
031    
032    /**
033     * @author Jacek Ambroziak
034     * @author Santiago Pericas-Geertsen
035     */
036    final class NumberCall extends FunctionCall {
037    
038        public NumberCall(QName fname, Vector arguments) {
039            super(fname, arguments);
040        }
041    
042        public Type typeCheck(SymbolTable stable) throws TypeCheckError {
043            if (argumentCount() > 0) {
044                argument().typeCheck(stable);
045            }
046            return _type = Type.Real;
047        }
048    
049        public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
050            final InstructionList il = methodGen.getInstructionList();
051            Type targ;
052            
053            if (argumentCount() == 0) {
054                il.append(methodGen.loadContextNode());
055                targ = Type.Node;
056            }
057            else {
058                final Expression arg = argument();
059                arg.translate(classGen, methodGen);
060                arg.startIterator(classGen, methodGen);
061                targ = arg.getType();
062            }
063    
064            if (!targ.identicalTo(Type.Real)) {
065                targ.translateTo(classGen, methodGen, Type.Real);
066            }
067        }
068    }