Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/themes/ThemeFactory.java @ 5285:05eaecd2be42
merge
author | Tom Gottfried <tom@intevation.de> |
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date | Thu, 14 Mar 2013 11:56:13 +0100 |
parents | a5f65e8983be |
children |
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package de.intevation.flys.themes; import de.intevation.artifacts.common.utils.XMLUtils; import de.intevation.flys.artifacts.FLYSArtifact; import de.intevation.flys.artifacts.context.FLYSContext; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.xml.xpath.XPathConstants; import org.apache.log4j.Logger; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NamedNodeMap; import org.w3c.dom.Node; import org.w3c.dom.NodeList; /** * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> * * Mapping-matching rules: * */ public class ThemeFactory { private static Logger logger = Logger.getLogger(ThemeFactory.class); /** Trivial, hidden constructor. */ private ThemeFactory() { } /** * Creates a new theme from <i>config</i>. * * @param themeCfg The theme config document that is used to fetch parent * themes. * @param config The theme config node. * * @return a new theme. */ public static Theme createTheme(Document themeCfg, Node config) { String name = getName(config); String desc = getDescription(config); logger.debug("Create new theme: " + name); Theme theme = new DefaultTheme(name, desc); parseInherits(themeCfg, config, theme); parseFields(config, theme); parseAttrs(config, theme); return theme; } /** * Get first matching theme for facet. * * @param name Name to match "from" of theme mapping. * @param pattern String to 'compare' to pattern in mapping. * @param output Name of the current output * * @return First matching theme. */ public static Theme getTheme( FLYSContext c, String name, String pattern, String output, String groupName) { if (logger.isDebugEnabled()) { logger.debug( "Search theme for: " + name + " - pattern: " + pattern); } if (c == null || name == null) { logger.warn("Cannot search for theme."); return null; } // Fetch mapping and themes. @SuppressWarnings("unchecked") Map<String, List<ThemeMapping>> map = (Map<String, List<ThemeMapping>>) c.get(FLYSContext.THEME_MAPPING); @SuppressWarnings("unchecked") List<ThemeGroup> tgs = (List<ThemeGroup>) c.get(FLYSContext.THEMES); ThemeGroup group = null; for (ThemeGroup tg: tgs) { if (tg.getName().equals(groupName)) { group = tg; break; } } if (group == null) { logger.warn("No theme group found: '" + groupName + "'"); return null; } Map<String, Theme> t = group.getThemes(); FLYSArtifact artifact = (FLYSArtifact) c.get(FLYSContext.ARTIFACT_KEY); if (map == null || map.isEmpty() || t == null || t.isEmpty()) { logger.warn("No mappings or themes found. Cannot retrieve theme!"); return null; } List<ThemeMapping> mapping = map.get(name); if (mapping == null) { logger.warn("No theme found for mapping: " + name); return null; } // Take first mapping of which all conditions are satisfied. for (ThemeMapping tm: mapping) { if (name.equals(tm.getFrom()) && tm.applyPattern(pattern) && tm.masterAttrMatches(artifact) && tm.outputMatches(output)) { String target = tm.getTo(); logger.debug("Found theme '" + target + "'"); return t.get(target); } } String msg = "No theme found for '" + name + "' with pattern '" + pattern + "' and output " + output + "."; logger.warn(msg); return null; } @SuppressWarnings("unchecked") public static List<ThemeGroup> getThemeGroups(FLYSContext c) { List<ThemeGroup> tgs = (List<ThemeGroup>) c.get(FLYSContext.THEMES); return tgs; } @SuppressWarnings("unchecked") public static List<Theme> getThemes (FLYSContext c, String name) { List<ThemeGroup> tgs = (List<ThemeGroup>) c.get(FLYSContext.THEMES); if (tgs == null) { return null; } List<Theme> themes = new ArrayList<Theme>(); for (ThemeGroup tg: tgs) { themes.add(tg.getThemeByName(name)); } return themes; } protected static String getName(Node config) { return ((Element)config).getAttribute("name"); } protected static String getDescription(Node config) { return ((Element)config).getAttribute("desc"); } protected static void parseInherits(Document themeCfg, Node cfg, Theme t) { parseInherits(themeCfg, cfg, t, null); } protected static void parseInherits( Document themeCfg, Node cfg, Theme t, Map<String, Node> themes ) { logger.debug("ThemeFactory.parseInherits"); NodeList inherits = ((Element)cfg).getElementsByTagName("inherit"); int num = inherits.getLength(); if (num == 0) { logger.debug("Theme does not inherit from other themes."); return; } logger.debug("Theme inherits from " + num + " other themes."); if (themes == null) { themes = buildThemeMap(themeCfg); } for (int i = 0; i < num; i++) { Node inherit = inherits.item(i); String from = ((Element)inherit).getAttribute("from"); Node tmp = themes.get(from); parseInherits(themeCfg, tmp, t, themes); parseFields(tmp, t); } } protected static Map<String, Node> buildThemeMap(Document themeCfg) { Map<String, Node> map = new HashMap<String, Node>(); String xpath = "/themes/themegroup/theme"; NodeList nodes = (NodeList)XMLUtils.xpath( themeCfg, xpath, XPathConstants.NODESET); if (nodes != null) { for (int i = 0, N = nodes.getLength(); i < N; ++i) { Node node = nodes.item(i); String name = ((Element)node).getAttribute("name"); map.put(name, node); } } return map; } protected static void parseFields(Node config, Theme theme) { if (config == null || theme == null) { logger.warn("Parsing fields without node or theme is senseless!"); return; } NodeList fields = ((Element)config).getElementsByTagName("field"); int num = fields.getLength(); logger.debug("Found " + num + " own fields in this theme."); if (num == 0) { logger.debug("Theme has no own fields."); return; } for (int i = 0; i < num; i++) { Node field = fields.item(i); addField(theme, field); } } protected static void addField(Theme theme, Node field) { String name = ((Element)field).getAttribute("name"); logger.debug("Add field " + name + " to theme " + theme.getName()); NamedNodeMap attrs = field.getAttributes(); int num = attrs != null ? attrs.getLength() : 0; if (num == 0) { logger.warn("This field has no attributes."); return; } ThemeField theField = new DefaultThemeField(name); for (int i = 0; i < num; i++) { Node attr = attrs.item(i); String key = attr.getNodeName(); String value = attr.getNodeValue(); theField.setAttribute(key, value); } theme.addField(name, theField); } protected static void parseAttrs(Node config, Theme theme) { NamedNodeMap attrs = config.getAttributes(); int num = attrs != null ? attrs.getLength() : 0; if (num == 0) { logger.debug("Theme has no attributes set."); return; } for (int i = 0; i < num; i++) { Node attr = attrs.item(i); String name = attr.getNodeName(); String value = attr.getNodeValue(); theme.addAttribute(name, value); } } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :