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/*
* reserved comment block
* DO NOT REMOVE OR ALTER!
*/
/*
* 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 1.2.4.1 2005/09/12 10:42:42 pvedula 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.xml.internal.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()";
}
}
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