org.apache.lucene.analysis.compound.hyphenation.Hyphen Maven / Gradle / Ivy
/*
* 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.compound.hyphenation;
/**
* This class represents a hyphen. A 'full' hyphen is made of 3 parts: the
* pre-break text, post-break text and no-break. If no line-break is generated
* at this position, the no-break text is used, otherwise, pre-break and
* post-break are used. Typically, pre-break is equal to the hyphen character
* and the others are empty. However, this general scheme allows support for
* cases in some languages where words change spelling if they're split across
* lines, like german's 'backen' which hyphenates 'bak-ken'. BTW, this comes
* from TeX.
*
* This class has been taken from the Apache FOP project (http://xmlgraphics.apache.org/fop/). They have been slightly modified.
*/
public class Hyphen {
public String preBreak;
public String noBreak;
public String postBreak;
Hyphen(String pre, String no, String post) {
preBreak = pre;
noBreak = no;
postBreak = post;
}
Hyphen(String pre) {
preBreak = pre;
noBreak = null;
postBreak = null;
}
@Override
public String toString() {
if (noBreak == null && postBreak == null && preBreak != null
&& preBreak.equals("-")) {
return "-";
}
StringBuilder res = new StringBuilder("{");
res.append(preBreak);
res.append("}{");
res.append(postBreak);
res.append("}{");
res.append(noBreak);
res.append('}');
return res.toString();
}
}