Michael Peter Christen
12 years ago
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/**
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* CommonPattern
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* Copyright 2012 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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* First published 26.11.2012 on http://yacy.net
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program in the file lgpl21.txt
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.yacy.cora.util;
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import java.util.regex.Pattern;
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/**
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* This class provides Pattern constants to be used
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* to replace a regex in s.split(regex) method calls.
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* Because s.split(regex) causes an execution of
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* Pattern.compile(regex).split(s, 0), it is wise to pre-compile
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* all regex to a pattern p.
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* Therefore do the following: transform your code into
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* Pattern p = Pattern.compile(regex); p.split(s);
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* The compilation of a specific pattern should be done only once.
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* Therefore this class provides Pattern objects for the most common regex Strings.
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*
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* The same applies to s.replaceall(regex, replacement) which is equal to
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* Pattern.compile(regex).matcher(s).replaceAll(replacement);
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*/
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public class CommonPattern {
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public final static Pattern SPACE = Pattern.compile(" ");
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public final static Pattern COMMA = Pattern.compile(",");
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public final static Pattern SEMICOLON = Pattern.compile(";");
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public final static Pattern DOUBLEPOINT = Pattern.compile(":");
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public final static Pattern SLASH = Pattern.compile("/");
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public final static Pattern AMP = Pattern.compile("&");
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public final static Pattern PLUS = Pattern.compile(Pattern.quote("+"));
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public final static Pattern DOT = Pattern.compile("\\.");
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public final static Pattern NEWLINE = Pattern.compile("\n");
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}
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