| /* |
| * 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.MethodGenerator; |
| import org.apache.xalan.xsltc.compiler.util.Type; |
| import org.apache.xalan.xsltc.compiler.util.TypeCheckError; |
| import org.apache.xml.dtm.Axis; |
| |
| /** |
| * @author Jacek Ambroziak |
| * @author Santiago Pericas-Geertsen |
| * @author Morten Jorgensen |
| */ |
| public abstract class LocationPathPattern extends Pattern { |
| private Template _template; |
| private int _importPrecedence; |
| private double _priority = Double.NaN; |
| private int _position = 0; |
| |
| public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
| return Type.Void; // TODO |
| } |
| |
| public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
| // TODO: What does it mean to translate a Pattern ? |
| } |
| |
| public void setTemplate(final Template template) { |
| _template = template; |
| _priority = template.getPriority(); |
| _importPrecedence = template.getImportPrecedence(); |
| _position = template.getPosition(); |
| } |
| |
| public Template getTemplate() { |
| return _template; |
| } |
| |
| public final double getPriority() { |
| return Double.isNaN(_priority) ? getDefaultPriority() : _priority; |
| } |
| |
| public double getDefaultPriority() { |
| return 0.5; |
| } |
| |
| /** |
| * This method is used by the Mode class to prioritise patterns and |
| * template. This method is called for templates that are in the same |
| * mode and that match on the same core pattern. The rules used are: |
| * o) first check precedence - highest precedence wins |
| * o) then check priority - highest priority wins |
| * o) then check the position - the template that occured last wins |
| */ |
| public boolean noSmallerThan(LocationPathPattern other) { |
| if (_importPrecedence > other._importPrecedence) { |
| return true; |
| } |
| else if (_importPrecedence == other._importPrecedence) { |
| if (_priority > other._priority) { |
| return true; |
| } |
| else if (_priority == other._priority) { |
| if (_position > other._position) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| public abstract StepPattern getKernelPattern(); |
| |
| public abstract void reduceKernelPattern(); |
| |
| public abstract boolean isWildcard(); |
| |
| public int getAxis() { |
| final StepPattern sp = getKernelPattern(); |
| return (sp != null) ? sp.getAxis() : Axis.CHILD; |
| } |
| |
| public String toString() { |
| return "root()"; |
| } |
| } |