- /*
- * Copyright 2001-2004 The Apache Software Foundation.
- *
- * Licensed 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: LocationPathPattern.java,v 1.6 2004/02/16 22:24:29 minchau Exp $
- */
-
- package com.sun.org.apache.xalan.internal.xsltc.compiler;
-
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
- import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
- import com.sun.org.apache.xalan.internal.xsltc.dom.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()";
- }
- }