| /* |
| * @(#)$Id$ |
| * |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 2001-2003 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xalan" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 2001, Sun |
| * Microsystems., http://www.sun.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| * @author Santiago Pericas-Geertsen |
| * |
| */ |
| |
| package org.apache.xalan.xsltc.compiler; |
| |
| import java.util.Vector; |
| |
| import org.apache.bcel.generic.ConstantPoolGen; |
| import org.apache.bcel.generic.CHECKCAST; |
| import org.apache.bcel.generic.InstructionList; |
| import org.apache.xalan.xsltc.compiler.util.ClassGenerator; |
| import org.apache.xalan.xsltc.compiler.util.MethodGenerator; |
| import org.apache.xalan.xsltc.compiler.util.ErrorMsg; |
| import org.apache.xalan.xsltc.compiler.util.Type; |
| import org.apache.xalan.xsltc.compiler.util.ObjectType; |
| import org.apache.xalan.xsltc.compiler.util.TypeCheckError; |
| |
| final class CastCall extends FunctionCall { |
| |
| /** |
| * Name of the class that is the target of the cast. Must be a |
| * fully-qualified Java class Name. |
| */ |
| private String _className; |
| |
| /** |
| * A reference to the expression being casted. |
| */ |
| private Expression _right; |
| |
| /** |
| * Constructor. |
| */ |
| public CastCall(QName fname, Vector arguments) { |
| super(fname, arguments); |
| } |
| |
| /** |
| * Type check the two parameters for this function |
| */ |
| public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
| // Check that the function was passed exactly two arguments |
| if (argumentCount() != 2) { |
| throw new TypeCheckError(new ErrorMsg(ErrorMsg.ILLEGAL_ARG_ERR, |
| getName(), this)); |
| } |
| |
| // The first argument must be a literal String |
| Expression exp = argument(0); |
| if (exp instanceof LiteralExpr) { |
| _className = ((LiteralExpr) exp).getValue(); |
| _type = Type.newObjectType(_className); |
| } |
| else { |
| throw new TypeCheckError(new ErrorMsg(ErrorMsg.NEED_LITERAL_ERR, |
| getName(), this)); |
| } |
| |
| // Second argument must be of type reference or object |
| _right = argument(1); |
| Type tright = _right.typeCheck(stable); |
| if (tright != Type.Reference && |
| tright instanceof ObjectType == false) |
| { |
| throw new TypeCheckError(new ErrorMsg(ErrorMsg.DATA_CONVERSION_ERR, |
| tright, _type, this)); |
| } |
| |
| return _type; |
| } |
| |
| public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = methodGen.getInstructionList(); |
| |
| _right.translate(classGen, methodGen); |
| il.append(new CHECKCAST(cpg.addClass(_className))); |
| } |
| } |