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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