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/*
This file is part of Subsonic.
Subsonic is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Subsonic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Subsonic. If not, see <http://www.gnu.org/licenses/>.
Copyright 2009 (C) Sindre Mehus
*/
package github.daneren2005.dsub.domain;
import java.util.regex.Pattern;
/**
* The criteria for a music search.
*
* @author Sindre Mehus
*/
public class SearchCritera {
private final String query;
private final int artistCount;
private final int albumCount;
private final int songCount;
private Pattern pattern;
public SearchCritera(String query, int artistCount, int albumCount, int songCount) {
this.query = query;
this.artistCount = artistCount;
this.albumCount = albumCount;
this.songCount = songCount;
}
public String getQuery() {
return query;
}
public int getArtistCount() {
return artistCount;
}
public int getAlbumCount() {
return albumCount;
}
public int getSongCount() {
return songCount;
}
/**
* Returns and caches a pattern instance that can be used to check if a
* string matches the query.
*/
public Pattern getPattern() {
// If the pattern wasn't already cached, create a new regular expression
// from the search string :
// * Surround the search string with ".*" (match anything)
// * Replace spaces and wildcard '*' characters with ".*"
// * All other characters are properly quoted
if (this.pattern == null) {
StringBuilder regex = new StringBuilder(".*");
StringBuilder currentPart = new StringBuilder();
for (int i = 0; i < query.length(); i++) {
char c = query.charAt(i);
if (c == '*' || c == ' ') {
regex.append(Pattern.quote(currentPart.toString()));
regex.append(".*");
currentPart = new StringBuilder();
} else {
currentPart.append(c);
}
}
if (currentPart.length() > 0) {
regex.append(Pattern.quote(currentPart.toString()));
}
regex.append(".*");
this.pattern = Pattern.compile(regex.toString(), Pattern.CASE_INSENSITIVE);
}
return this.pattern;
}
}
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