/*
 * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
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package javax.swing;

import java.util.Enumeration;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Locale;
import java.util.Map.Entry;
import java.util.Set;



Author:Hans Muller
/** * * @author Hans Muller */
class MultiUIDefaults extends UIDefaults { private UIDefaults[] tables; public MultiUIDefaults(UIDefaults[] defaults) { super(); tables = defaults; } public MultiUIDefaults() { super(); tables = new UIDefaults[0]; } @Override public Object get(Object key) { Object value = super.get(key); if (value != null) { return value; } for (UIDefaults table : tables) { value = (table != null) ? table.get(key) : null; if (value != null) { return value; } } return null; } @Override public Object get(Object key, Locale l) { Object value = super.get(key,l); if (value != null) { return value; } for (UIDefaults table : tables) { value = (table != null) ? table.get(key,l) : null; if (value != null) { return value; } } return null; } @Override public int size() { return entrySet().size(); } @Override public boolean isEmpty() { return size() == 0; } @Override public Enumeration<Object> keys() { return new MultiUIDefaultsEnumerator( MultiUIDefaultsEnumerator.Type.KEYS, entrySet()); } @Override public Enumeration<Object> elements() { return new MultiUIDefaultsEnumerator( MultiUIDefaultsEnumerator.Type.ELEMENTS, entrySet()); } @Override public Set<Entry<Object, Object>> entrySet() { Set<Entry<Object, Object>> set = new HashSet<Entry<Object, Object>>(); for (int i = tables.length - 1; i >= 0; i--) { if (tables[i] != null) { set.addAll(tables[i].entrySet()); } } set.addAll(super.entrySet()); return set; } @Override protected void getUIError(String msg) { if (tables.length > 0) { tables[0].getUIError(msg); } else { super.getUIError(msg); } } private static class MultiUIDefaultsEnumerator implements Enumeration<Object> { public static enum Type { KEYS, ELEMENTS }; private Iterator<Entry<Object, Object>> iterator; private Type type; MultiUIDefaultsEnumerator(Type type, Set<Entry<Object, Object>> entries) { this.type = type; this.iterator = entries.iterator(); } public boolean hasMoreElements() { return iterator.hasNext(); } public Object nextElement() { switch (type) { case KEYS: return iterator.next().getKey(); case ELEMENTS: return iterator.next().getValue(); default: return null; } } } @Override public Object remove(Object key) { Object value = null; for (int i = tables.length - 1; i >= 0; i--) { if (tables[i] != null) { Object v = tables[i].remove(key); if (v != null) { value = v; } } } Object v = super.remove(key); if (v != null) { value = v; } return value; } @Override public void clear() { super.clear(); for (UIDefaults table : tables) { if (table != null) { table.clear(); } } } @Override public synchronized String toString() { StringBuffer buf = new StringBuffer(); buf.append("{"); Enumeration keys = keys(); while (keys.hasMoreElements()) { Object key = keys.nextElement(); buf.append(key + "=" + get(key) + ", "); } int length = buf.length(); if (length > 1) { buf.delete(length-2, length); } buf.append("}"); return buf.toString(); } }