+++ /dev/null
-package org.apache.lucene.analysis.position;
-
-/**
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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.
- */
-
-import java.io.IOException;
-
-import org.apache.lucene.analysis.TokenFilter;
-import org.apache.lucene.analysis.TokenStream;
-import org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute;
-
-/** Set the positionIncrement of all tokens to the "positionIncrement",
- * except the first return token which retains its original positionIncrement value.
- * The default positionIncrement value is zero.
- */
-public final class PositionFilter extends TokenFilter {
-
- /** Position increment to assign to all but the first token - default = 0 */
- private int positionIncrement = 0;
-
- /** The first token must have non-zero positionIncrement **/
- private boolean firstTokenPositioned = false;
-
- private PositionIncrementAttribute posIncrAtt = addAttribute(PositionIncrementAttribute.class);
-
- /**
- * Constructs a PositionFilter that assigns a position increment of zero to
- * all but the first token from the given input stream.
- *
- * @param input the input stream
- */
- public PositionFilter(final TokenStream input) {
- super(input);
- }
-
- /**
- * Constructs a PositionFilter that assigns the given position increment to
- * all but the first token from the given input stream.
- *
- * @param input the input stream
- * @param positionIncrement position increment to assign to all but the first
- * token from the input stream
- */
- public PositionFilter(final TokenStream input, final int positionIncrement) {
- this(input);
- this.positionIncrement = positionIncrement;
- }
-
- @Override
- public final boolean incrementToken() throws IOException {
- if (input.incrementToken()) {
- if (firstTokenPositioned) {
- posIncrAtt.setPositionIncrement(positionIncrement);
- } else {
- firstTokenPositioned = true;
- }
- return true;
- } else {
- return false;
- }
- }
-
- @Override
- public void reset() throws IOException {
- super.reset();
- firstTokenPositioned = false;
- }
-}