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/*===========================================================================
  Copyright (C) 2016-2020 by the Okapi Framework contributors
-----------------------------------------------------------------------------
  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.
===========================================================================*/

package net.sf.okapi.common.resource;

import java.util.Comparator;

public class SegmentComparator implements Comparator {
	/**
	 * Match on id and type (segment or not) or TextFragment. If no id exists match on TextFragment (including
	 * all codes)
	 */
	@Override
	public int compare(final Segment orig, final Segment trans) {
		// not enough info to match
		if (orig == null && trans == null) {
			return -1;
		}

		// we know both can't be null at this point
		if (orig == null || trans == null) {
			return -1;
		}

		// if both have originalId's then we consider this the strongest match
		// some filters like xliff2 require an id - but conversion to xliff1.2 may lose it
		// originalID is the strongest match as id may be autogenerated
		if (orig.originalId != null && orig.originalId.equals(trans.getOriginalId())) {
			return 0;
		}

		if (orig.id != null && orig.id.equals(trans.getId())) {
			return 0;
		}

		return -1;
	}
}