/*******************************************************************************
* Copyright 2014 University of Southern California
*
* 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.
*
* This code was developed by the Information Integration Group as part
* of the Karma project at the Information Sciences Institute of the
* University of Southern California. For more information, publications,
* and related projects, please see: http://www.isi.edu/integration
******************************************************************************/
package edu.isi.karma.kr2rml.affinity;
import edu.isi.karma.rep.HNodePath;
public class ParentRowColumnAffinity implements ColumnAffinity {
public static final ColumnAffinity INSTANCE = new ParentRowColumnAffinity();
private int distanceToParent;
private ParentRowColumnAffinity()
{
}
private ParentRowColumnAffinity(HNodePath a, HNodePath b)
{
setDistanceToParent(b.length() - a.length());
}
@Override
public ColumnAffinity generateAffinity(HNodePath a, HNodePath b)
{
return new ParentRowColumnAffinity(a, b);
}
@Override
public int compareTo(ColumnAffinity o) {
if(o instanceof RowColumnAffinity)
{
return 1;
}
else if(o instanceof ParentRowColumnAffinity)
{
ParentRowColumnAffinity p = (ParentRowColumnAffinity) o;
return getDistanceToParent() - p.getDistanceToParent();
}
else
{
return -1;
}
}
@Override
public boolean isValidFor(HNodePath a, HNodePath b) {
HNodePath commonPath = HNodePath.findCommon(a, b);
if(commonPath.length() == a.length() && b.length() > a.length())
{
return true;
}
return false;
}
@Override
public boolean isCloserThan(ColumnAffinity otherAffinity) {
return compareTo(otherAffinity) < 0;
}
public int getDistanceToParent() {
return distanceToParent;
}
public void setDistanceToParent(int distanceToParent) {
this.distanceToParent = distanceToParent;
}
}