102 lines
3.4 KiB
Java
102 lines
3.4 KiB
Java
/*
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* Copyright (c) 2004, 2005, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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What is the dead simplest thing to do?
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Extend AbstractMap and don't optimize for anything.
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The only new api is 'getValues()' which returns the values struct as
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long as no map api has been called. If any map api is called,
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create a real map and forward to it, and nuke values because of the
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possibility that the map has been changed. This is easier than
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trying to create a map that only clears values if the map has been
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changed, or implementing the map API directly on top of the values
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struct. We can always do that later if need be.
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*/
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package sun.font;
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import java.awt.Paint;
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import java.awt.font.GraphicAttribute;
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import java.awt.font.NumericShaper;
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import java.awt.font.TextAttribute;
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import java.awt.font.TransformAttribute;
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import java.awt.geom.AffineTransform;
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import java.awt.im.InputMethodHighlight;
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import java.text.AttributedCharacterIterator.Attribute;
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import java.util.AbstractMap;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Set;
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import java.util.Map.Entry;
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import static sun.font.AttributeValues.*;
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public final class AttributeMap extends AbstractMap<TextAttribute, Object> {
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private AttributeValues values;
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private Map<TextAttribute, Object> delegateMap;
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public AttributeMap(AttributeValues values) {
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this.values = values;
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}
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public Set<Entry<TextAttribute, Object>> entrySet() {
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return delegate().entrySet();
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}
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public Object put(TextAttribute key, Object value) {
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return delegate().put(key, value);
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}
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// internal API
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public AttributeValues getValues() {
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return values;
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}
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private static boolean first = false; // debug
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private Map<TextAttribute, Object> delegate() {
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if (delegateMap == null) {
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if (first) {
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first = false;
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Thread.dumpStack();
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}
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delegateMap = values.toMap(new HashMap<TextAttribute, Object>(27));
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// nuke values, once map is accessible it might be mutated and values would
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// no longer reflect its contents
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values = null;
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}
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return delegateMap;
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}
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public String toString() {
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if (values != null) {
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return "map of " + values.toString();
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}
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return super.toString();
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}
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}
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