Source Code Cross Referenced for FxValueRendererImpl.java in  » J2EE » fleXive » com » flexive » shared » value » renderer » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » fleXive » com.flexive.shared.value.renderer 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /***************************************************************
002:         *  This file is part of the [fleXive](R) project.
003:         *
004:         *  Copyright (c) 1999-2008
005:         *  UCS - unique computing solutions gmbh (http://www.ucs.at)
006:         *  All rights reserved
007:         *
008:         *  The [fleXive](R) project is free software; you can redistribute
009:         *  it and/or modify it under the terms of the GNU General Public
010:         *  License as published by the Free Software Foundation;
011:         *  either version 2 of the License, or (at your option) any
012:         *  later version.
013:         *
014:         *  The GNU General Public License can be found at
015:         *  http://www.gnu.org/copyleft/gpl.html.
016:         *  A copy is found in the textfile GPL.txt and important notices to the
017:         *  license from the author are found in LICENSE.txt distributed with
018:         *  these libraries.
019:         *
020:         *  This library is distributed in the hope that it will be useful,
021:         *  but WITHOUT ANY WARRANTY; without even the implied warranty of
022:         *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
023:         *  GNU General Public License for more details.
024:         *
025:         *  For further information about UCS - unique computing solutions gmbh,
026:         *  please see the company website: http://www.ucs.at
027:         *
028:         *  For further information about [fleXive](R), please see the
029:         *  project website: http://www.flexive.org
030:         *
031:         *
032:         *  This copyright notice MUST APPEAR in all copies of the file!
033:         ***************************************************************/package com.flexive.shared.value.renderer;
034:
035:        import com.flexive.shared.FxContext;
036:        import com.flexive.shared.FxLanguage;
037:        import com.flexive.shared.value.FxValue;
038:
039:        import java.io.IOException;
040:        import java.io.Writer;
041:        import java.util.concurrent.ConcurrentHashMap;
042:        import java.util.concurrent.ConcurrentMap;
043:
044:        /**
045:         * <p>
046:         * Default FxValue renderer implementation for a specific language. Forwards requests to an internal
047:         * map of {@link FxValueFormatter} instances.</p>
048:         * <p>
049:         * This renderer stores the target language and a map of {@link FxValueFormatter} instances
050:         * that can be used to override the default formatters. The renderers returned by
051:         * the {@link FxValueRendererFactory} do not use this functionality, but use the
052:         * standard formatters for all instances.
053:         * </p>
054:         * <p>
055:         * <b>Note:</b>: this class is deliberately not public, since this would allow
056:         * static renderer instances to be manipulated through the {@link #put} method.
057:         * </p>
058:         * 
059:         * @author Daniel Lichtenberger (daniel.lichtenberger@flexive.com), UCS - unique computing solutions gmbh (http://www.ucs.at)
060:         * @version $Rev: 181 $
061:         */
062:        class FxValueRendererImpl implements  FxValueRenderer {
063:            private final FxLanguage language;
064:            private final ConcurrentMap<Class, FxValueFormatter> rendererMap = new ConcurrentHashMap<Class, FxValueFormatter>();
065:
066:            /**
067:             * Create a new renderer for the given language.
068:             * @param language  the language
069:             */
070:            FxValueRendererImpl(FxLanguage language) {
071:                this .language = language;
072:            }
073:
074:            /**
075:             * Create a new renderer in the calling user's language.
076:             */
077:            FxValueRendererImpl() {
078:                this (FxContext.get().getTicket().getLanguage());
079:            }
080:
081:            /** {@inheritDoc} */
082:            public String format(FxValue value) {
083:                return format(value, language);
084:            }
085:
086:            /** {@inheritDoc} */
087:            @SuppressWarnings({"unchecked"})
088:            public String format(FxValue value, FxLanguage translationLanguage) {
089:                final FxValueFormatter formatter = get(value.getClass());
090:                if (formatter != null) {
091:                    return formatter.format(value, value
092:                            .getBestTranslation(translationLanguage), language);
093:                }
094:                // use generic object formatter as fallback
095:                return get(FxValue.class)
096:                        .format(value,
097:                                value.getBestTranslation(translationLanguage),
098:                                language);
099:            }
100:
101:            /** {@inheritDoc} */
102:            public FxValueRenderer render(Writer out, FxValue value)
103:                    throws IOException {
104:                out.write(format(value));
105:                return this ;
106:            }
107:
108:            /** {@inheritDoc} */
109:            public FxValueRenderer render(Writer out, FxValue value,
110:                    FxLanguage translationLanguage) throws IOException {
111:                out.write(format(value, translationLanguage));
112:                return this ;
113:            }
114:
115:            <DT, T extends FxValue<DT, T>> void put(Class<T> type,
116:                    FxValueFormatter<DT, T> formatter) {
117:                rendererMap.put(type, formatter);
118:            }
119:
120:            FxValueFormatter get(Class valueType) {
121:                //noinspection unchecked
122:                final FxValueFormatter formatter = rendererMap.get(valueType); // safe because put(...) method is bounded
123:                return formatter != null ? formatter // return formatter
124:                        : (!language.equals(FxValueRendererFactory.DEFAULT) ? FxValueRendererFactory
125:                                .getDefaultFormatter(valueType)
126:                                : null); // use fallback
127:            }
128:        }
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