| /* |
| * 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 org.apache.xalan.xsltc.compiler.util.ClassGenerator; |
| import org.apache.xalan.xsltc.compiler.util.ErrorMsg; |
| import org.apache.xalan.xsltc.compiler.util.MethodGenerator; |
| import org.apache.xalan.xsltc.compiler.util.Type; |
| import org.apache.xalan.xsltc.compiler.util.TypeCheckError; |
| |
| /** |
| * @author Morten Jorgensen |
| */ |
| final class UnresolvedRef extends VariableRefBase { |
| |
| private QName _variableName = null; |
| private VariableRefBase _ref = null; |
| |
| public UnresolvedRef(QName name) { |
| super(); |
| _variableName = name; |
| } |
| |
| 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; |
| } |
| |
| // If in a top-level element, create dependency to the referenced var |
| _variable = ref; |
| addParentDependency(); |
| |
| if (ref instanceof Variable) { |
| return new VariableRef((Variable) ref); |
| } |
| else if (ref instanceof Param) { |
| return new ParameterRef((Param)ref); |
| } |
| 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()"; |
| } |
| |
| } |