com.sun.tools.rngom.binary.DuplicateAttributeDetector Maven / Gradle / Ivy
/*
* Copyright (C) 2004-2011
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.sun.tools.rngom.binary;
import java.util.ArrayList;
import java.util.List;
import com.sun.tools.rngom.nc.NameClass;
class DuplicateAttributeDetector {
private List nameClasses = new ArrayList();
private Alternative alternatives = null;
private static class Alternative {
private int startIndex;
private int endIndex;
private Alternative parent;
private Alternative(int startIndex, Alternative parent) {
this.startIndex = startIndex;
this.endIndex = startIndex;
this.parent = parent;
}
}
boolean addAttribute(NameClass nc) {
int lim = nameClasses.size();
for (Alternative a = alternatives; a != null; a = a.parent) {
for (int i = a.endIndex; i < lim; i++)
if (nc.hasOverlapWith((NameClass) nameClasses.get(i)))
return false;
lim = a.startIndex;
}
for (int i = 0; i < lim; i++)
if (nc.hasOverlapWith((NameClass) nameClasses.get(i)))
return false;
nameClasses.add(nc);
return true;
}
void startChoice() {
alternatives = new Alternative(nameClasses.size(), alternatives);
}
void alternative() {
alternatives.endIndex = nameClasses.size();
}
void endChoice() {
alternatives = alternatives.parent;
}
}