| /* |
| * 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. |
| */ |
| package org.apache.lucene.analysis.hunspell; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| class RepEntry { |
| private final String pattern; |
| private final String replacement; |
| private final boolean mustStart; |
| private final boolean mustEnd; |
| private final int patternLen; |
| |
| RepEntry(String rawPattern, String rawReplacement) { |
| mustStart = rawPattern.startsWith("^"); |
| mustEnd = rawPattern.endsWith("$"); |
| pattern = rawPattern.substring(mustStart ? 1 : 0, rawPattern.length() - (mustEnd ? 1 : 0)); |
| replacement = rawReplacement.replace('_', ' '); |
| patternLen = pattern.length(); |
| } |
| |
| boolean isMiddle() { |
| return !mustStart && !mustEnd; |
| } |
| |
| List<String> substitute(String word) { |
| if (mustStart) { |
| boolean matches = mustEnd ? word.equals(pattern) : word.startsWith(pattern); |
| return matches |
| ? Collections.singletonList(replacement + word.substring(patternLen)) |
| : Collections.emptyList(); |
| } |
| |
| if (mustEnd) { |
| return word.endsWith(pattern) |
| ? Collections.singletonList(word.substring(0, word.length() - patternLen) + replacement) |
| : Collections.emptyList(); |
| } |
| |
| int pos = word.indexOf(pattern); |
| if (pos < 0) return Collections.emptyList(); |
| |
| List<String> result = new ArrayList<>(); |
| while (pos >= 0) { |
| result.add(word.substring(0, pos) + replacement + word.substring(pos + patternLen)); |
| pos = word.indexOf(pattern, pos + 1); |
| } |
| return result; |
| } |
| |
| @Override |
| public String toString() { |
| return (mustStart ? "^" : "") + pattern + (mustEnd ? "$" : "") + "->" + replacement; |
| } |
| } |