/*
* Copyright (C) 2009-2011 Geometer Plus <contact@geometerplus.com>
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
package org.geometerplus.fbreader.library;
import java.util.HashMap;
public final class Tag {
private static final HashMap<Tag,Tag> ourTagSet = new HashMap<Tag,Tag>();
public static Tag getTag(Tag parent, String name) {
if (name == null) {
return parent;
}
name = name.trim();
if (name.length() == 0) {
return parent;
}
Tag tag = new Tag(parent, name);
Tag stored = ourTagSet.get(tag);
if (stored != null) {
return stored;
}
ourTagSet.put(tag, tag);
return tag;
}
public final Tag Parent;
public final String Name;
private Tag(Tag parent, String name) {
Parent = parent;
Name = name;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof Tag)) {
return false;
}
Tag t = (Tag)o;
return (Parent == t.Parent) && Name.equals(t.Name);
}
@Override
public int hashCode() {
return (Parent == null) ? Name.hashCode() : Parent.hashCode() + Name.hashCode();
}
}