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*/ |
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/* |
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* Licensed to the Apache Software Foundation (ASF) under one or more |
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* contributor license agreements. See the NOTICE file distributed with |
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* this work for additional information regarding copyright ownership. |
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* The ASF licenses this file to You under the Apache License, Version 2.0 |
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* (the "License"); you may not use this file except in compliance with |
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* the License. You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package com.sun.org.apache.xalan.internal.xsltc.compiler; |
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import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator; |
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import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg; |
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import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator; |
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import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type; |
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import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError; |
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*/ |
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final class UnresolvedRef extends VariableRefBase { |
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private QName _variableName = null; |
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private VariableRefBase _ref = null; |
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public UnresolvedRef(QName name) { |
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super(); |
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_variableName = name; |
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} |
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public QName getName() { |
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return(_variableName); |
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} |
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private ErrorMsg reportError() { |
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ErrorMsg err = new ErrorMsg(ErrorMsg.VARIABLE_UNDEF_ERR, |
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_variableName, this); |
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getParser().reportError(Constants.ERROR, err); |
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return(err); |
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} |
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private VariableRefBase resolve(Parser parser, SymbolTable stable) { |
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// At this point the AST is already built and we should be able to |
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VariableBase ref = parser.lookupVariable(_variableName); |
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if (ref == null) { |
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ref = (VariableBase)stable.lookupName(_variableName); |
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} |
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if (ref == null) { |
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reportError(); |
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return null; |
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} |
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_variable = ref; |
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addParentDependency(); |
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if (ref instanceof Variable) { |
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return new VariableRef((Variable) ref); |
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} |
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else if (ref instanceof Param) { |
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return new ParameterRef((Param)ref); |
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} |
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return null; |
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} |
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public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
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if (_ref != null) { |
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final String name = _variableName.toString(); |
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ErrorMsg err = new ErrorMsg(ErrorMsg.CIRCULAR_VARIABLE_ERR, |
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name, this); |
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} |
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if ((_ref = resolve(getParser(), stable)) != null) { |
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return (_type = _ref.typeCheck(stable)); |
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} |
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throw new TypeCheckError(reportError()); |
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} |
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public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
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if (_ref != null) |
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_ref.translate(classGen, methodGen); |
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else |
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reportError(); |
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} |
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public String toString() { |
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return "unresolved-ref()"; |
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} |
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} |