| /* |
| * @(#)$Id$ |
| * |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 2001 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 Morten Jorgensen |
| * |
| */ |
| |
| package org.apache.xalan.xsltc.compiler; |
| |
| import org.apache.xalan.xsltc.compiler.util.Type; |
| import org.apache.bcel.generic.*; |
| import org.apache.xalan.xsltc.compiler.util.*; |
| |
| final class UnresolvedRef extends VariableRefBase { |
| |
| private QName _variableName = null; |
| private VariableRefBase _ref = null; |
| private VariableBase _var = null; |
| private Stylesheet _sheet = null; |
| |
| public UnresolvedRef(QName name) { |
| super(); |
| _variableName = name; |
| _sheet = getStylesheet(); |
| } |
| |
| public QName getName() { |
| return(_variableName); |
| } |
| |
| private ErrorMsg reportError() { |
| ErrorMsg err = new ErrorMsg(ErrorMsg.VARIABLE_UNDEF_ERR, |
| _variableName, this); |
| getParser().reportError(Constants.ERROR, err); |
| return(err); |
| } |
| |
| private VariableRefBase resolve(Parser parser, SymbolTable stable) { |
| // At this point the AST is already built and we should be able to |
| // find any declared global variable or parameter |
| VariableBase ref = parser.lookupVariable(_variableName); |
| if (ref == null) ref = (VariableBase)stable.lookupName(_variableName); |
| if (ref == null) { |
| reportError(); |
| return null; |
| } |
| |
| // Insert the referenced variable as something the parent variable |
| // is dependent of (this class should only be used under variables) |
| if ((_var = findParentVariable()) != null) _var.addDependency(ref); |
| |
| // Instanciate a true variable/parameter ref |
| if (ref instanceof Variable) |
| return(new VariableRef((Variable)ref)); |
| else if (ref instanceof Param) |
| return(new ParameterRef((Param)ref)); |
| else |
| return null; |
| } |
| |
| public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
| if (_ref != null) { |
| final String name = _variableName.toString(); |
| ErrorMsg err = new ErrorMsg(ErrorMsg.CIRCULAR_VARIABLE_ERR, |
| name, this); |
| } |
| if ((_ref = resolve(getParser(), stable)) != null) { |
| return (_type = _ref.typeCheck(stable)); |
| } |
| throw new TypeCheckError(reportError()); |
| } |
| |
| public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
| if (_ref != null) |
| _ref.translate(classGen, methodGen); |
| else |
| reportError(); |
| } |
| |
| public String toString() { |
| return "unresolved-ref()"; |
| } |
| |
| } |