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50 lines
2.4 KiB
50 lines
2.4 KiB
/*
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XOWA: the XOWA Offline Wiki Application
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Copyright (C) 2012 gnosygnu@gmail.com
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program 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
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package gplx.core.lists; import gplx.*; import gplx.core.*;
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public abstract class Hash_adp_base implements Hash_adp {
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public boolean Has(Object key) {return Has_base(key);}
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public Object Get_by(Object key) {return Fetch_base(key);}
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public Object Get_by_or_fail(Object key) {return Get_by_or_fail_base(key);}
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public void Add(Object key, Object val) {Add_base(key, val);}
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public void Add_as_key_and_val(Object val) {Add_base(val, val);}
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public void Add_if_dupe_use_nth(Object key, Object val) {
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Object existing = Fetch_base(key); if (existing != null) Del(key); // overwrite if exists
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Add(key, val);
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}
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public boolean Add_if_dupe_use_1st(Object key, Object val) {
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if (Has(key)) return false;
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Add(key, val);
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return true;
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}
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@gplx.Virtual public void Del(Object key) {Del_base(key);}
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protected Object Get_by_or_fail_base(Object key) {
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if (key == null) throw Err_.new_wo_type("key cannot be null");
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if (!Has_base(key)) throw Err_.new_wo_type("key not found", "key", key);
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return Fetch_base(key);
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}
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private final java.util.Hashtable hash = new java.util.Hashtable();
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@gplx.Virtual public int Count() {return hash.size();}
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@gplx.Virtual public void Clear() {hash.clear();}
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@gplx.Virtual protected void Add_base(Object key, Object val) {hash.put(key, val);}
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@gplx.Virtual protected void Del_base(Object key) {hash.remove(key);}
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@gplx.Virtual protected boolean Has_base(Object key) {return hash.containsKey(key);}
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@gplx.Virtual protected Object Fetch_base(Object key) {return hash.get(key);}
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@gplx.Virtual public java.util.Iterator iterator() {return hash.values().iterator();}
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}
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