teichmann@7040: /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
teichmann@7040:  * Software engineering by Intevation GmbH
teichmann@7040:  *
teichmann@7040:  * This file is Free Software under the GNU AGPL (>=v3)
teichmann@7040:  * and comes with ABSOLUTELY NO WARRANTY! Check out the
teichmann@7040:  * documentation coming with Dive4Elements River for details.
teichmann@7040:  */
teichmann@7040: 
teichmann@7040: package org.dive4elements.river.exports;
teichmann@7040: 
teichmann@7040: import java.util.ArrayList;
teichmann@7040: import java.util.List;
teichmann@7040: 
teichmann@7040: import org.w3c.dom.Element;
teichmann@7040: import org.w3c.dom.NodeList;
teichmann@7040: 
teichmann@7040: import org.dive4elements.river.exports.process.Processor;
teichmann@7040: 
teichmann@7040: import org.apache.log4j.Logger;
teichmann@7040: 
teichmann@7048: import org.dive4elements.artifacts.CallContext;
teichmann@7048: 
teichmann@7048: import org.dive4elements.river.artifacts.resources.Resources;
teichmann@7048: import org.dive4elements.river.artifacts.D4EArtifact;
teichmann@7048: 
teichmann@7040: public class DiagramAttributes
teichmann@7040: {
teichmann@7040:     private static Logger log = Logger.getLogger(DiagramAttributes.class);
teichmann@7040: 
teichmann@7048:     public static class AxisAttributes {
teichmann@7040:         // TODO: More Attributes
teichmann@7040:         private String name;
teichmann@7040: 
teichmann@7040:         public AxisAttributes() {
teichmann@7040:         }
teichmann@7040: 
teichmann@7040:         public AxisAttributes(String name) {
teichmann@7040:             this.name = name;
teichmann@7040:         }
teichmann@7040: 
teichmann@7040:         public String getName() {
teichmann@7040:             return name;
teichmann@7040:         }
teichmann@7040:     } // class AxisAttributes
teichmann@7040: 
teichmann@7048:     public static class AxisProcessor {
teichmann@7040:         private Processor processor;
teichmann@7040:         private String axisName;
teichmann@7040: 
teichmann@7040:         public AxisProcessor() {
teichmann@7040:         }
teichmann@7040: 
teichmann@7040:         public AxisProcessor(Processor processor, String axisName) {
teichmann@7040:             this.processor = processor;
teichmann@7040:             this.axisName  = axisName;
teichmann@7040:         }
teichmann@7040: 
teichmann@7040:         public Processor getProcessor() {
teichmann@7040:             return processor;
teichmann@7040:         }
teichmann@7040: 
teichmann@7042:         public String getAxisName() {
teichmann@7040:             return axisName;
teichmann@7040:         }
teichmann@7040:     } // class AxisProcessor
teichmann@7040: 
teichmann@7048:     public static class Argument {
teichmann@7048:         private String expression;
teichmann@7048:         private String type;
teichmann@7048: 
teichmann@7048:         public Argument() {
teichmann@7048:         }
teichmann@7048: 
teichmann@7048:         public Argument(String expression, String type) {
teichmann@7048:             this.expression = expression;
teichmann@7048:             this.type = type;
teichmann@7048:         }
teichmann@7048: 
teichmann@7048:         public Object evaluate(D4EArtifact artifact, CallContext context) {
teichmann@7048:             if (expression.startsWith("artifact.")) {
teichmann@7048:                 String value = artifact.getDataAsString(
teichmann@7048:                     expression.substring("artifact.".length()));
teichmann@7048:                 return convert(value);
teichmann@7048:             }
teichmann@7048:             if (expression.startsWith("context.")) {
teichmann@7048:                 return context.getContextValue(
teichmann@7048:                     expression.substring("context.".length()));
teichmann@7048:             }
teichmann@7048:             return expression;
teichmann@7048:         }
teichmann@7048: 
teichmann@7048:         private Object convert(String value) {
teichmann@7048:             if (value == null || type == null) {
teichmann@7048:                 return value;
teichmann@7048:             }
teichmann@7048:             if ("double".equals(type)) {
teichmann@7048:                 return Double.valueOf(value);
teichmann@7048:             }
teichmann@7048:             if ("int".equals(type)) {
teichmann@7048:                 return Integer.valueOf(value);
teichmann@7048:             }
teichmann@7048:             // TODO: more types
teichmann@7048:             return value;
teichmann@7048:         }
teichmann@7048:     } // class Argument
teichmann@7048: 
teichmann@7048:     public static class Title {
teichmann@7048: 
teichmann@7048:         private String key;
teichmann@7048:         private String def;
teichmann@7048:         private List<Argument> arguments;
teichmann@7048: 
teichmann@7048:         public Title() {
teichmann@7048:             arguments = new ArrayList<Argument>(5);
teichmann@7048:         }
teichmann@7048: 
teichmann@7048:         public Title(String key) {
teichmann@7048:             this(key, key);
teichmann@7048:         }
teichmann@7048: 
teichmann@7048:         public Title(String key, String def) {
teichmann@7048:             this();
teichmann@7048:             this.key = key;
teichmann@7048:             this.def = def;
teichmann@7048:         }
teichmann@7048: 
teichmann@7048:         public String getKey() {
teichmann@7048:             return key;
teichmann@7048:         }
teichmann@7048: 
teichmann@7048:         public void addArgument(Argument argument) {
teichmann@7048:             arguments.add(argument);
teichmann@7048:         }
teichmann@7048: 
teichmann@7048:         public String evalute(D4EArtifact artifact, CallContext context) {
teichmann@7048:             if (key == null || key.isEmpty()) {
teichmann@7048:                 return def;
teichmann@7048:             }
teichmann@7048:             Object [] args = new Object[arguments.size()];
teichmann@7048:             for (int i = 0; i < args.length; ++i) {
teichmann@7048:                 args[i] = arguments.get(i).evaluate(artifact, context);
teichmann@7048:             }
teichmann@7048:             return Resources.getMsg(context.getMeta(), key, def, args);
teichmann@7048:         }
teichmann@7048:     } // class Title
teichmann@7048: 
teichmann@7040:     private List<AxisAttributes> axesAttrs;
teichmann@7040:     private List<AxisProcessor> axesProcessors;
teichmann@7040: 
teichmann@7048:     private Title title;
teichmann@7048:     private Title subtitle;
teichmann@7048: 
teichmann@7040:     public DiagramAttributes() {
teichmann@7040:         axesAttrs      = new ArrayList<AxisAttributes>(5);
teichmann@7040:         axesProcessors = new ArrayList<AxisProcessor>(5);
teichmann@7040:     }
teichmann@7040: 
teichmann@7040:     public DiagramAttributes(Element config) {
teichmann@7040:         this();
teichmann@7040:         parseAxis(config);
teichmann@7040:         parseProcessors(config);
teichmann@7048:         parseTitle(config);
teichmann@7040:     }
teichmann@7040: 
teichmann@7040:     private void parseAxis(Element config) {
teichmann@7040:         NodeList axisNodes = config.getElementsByTagName("axis");
teichmann@7040: 
teichmann@7040:         for (int i = 0, N = axisNodes.getLength(); i < N; ++i) {
teichmann@7040:             Element axisElement = (Element)axisNodes.item(i);
teichmann@7040:             String name = axisElement.getAttribute("name").trim();
teichmann@7040:             if (!name.isEmpty()) {
teichmann@7040:                 axesAttrs.add(new AxisAttributes(name));
teichmann@7040:             }
teichmann@7040:         }
teichmann@7040:     }
teichmann@7040: 
teichmann@7040:     public List<AxisProcessor> getAxesProcessors() {
teichmann@7040:         return axesProcessors;
teichmann@7040:     }
teichmann@7040: 
teichmann@7048:     public Title getTitle() {
teichmann@7048:         return title;
teichmann@7048:     }
teichmann@7048: 
teichmann@7048:     public Title getSubtitle() {
teichmann@7048:         return subtitle;
teichmann@7048:     }
teichmann@7048: 
teichmann@7040:     private void parseProcessors(Element config) {
teichmann@7040:         NodeList processorNodes = config.getElementsByTagName("processor");
teichmann@7040: 
teichmann@7040:         for (int i = 0, N = processorNodes.getLength(); i < N; ++i) {
teichmann@7040:             Element processorElement = (Element)processorNodes.item(i);
teichmann@7040:             String className = processorElement.getAttribute("class").trim();
teichmann@7040:             String axisName = processorElement.getAttribute("axis").trim();
teichmann@7040:             if (className.isEmpty() || axisName.isEmpty()) {
teichmann@7040:                 continue;
teichmann@7040:             }
teichmann@7040: 
teichmann@7040:             try {
teichmann@7040:                 Processor processor =
teichmann@7040:                     (Processor)Class.forName(className).newInstance();
teichmann@7040:                 axesProcessors.add(new AxisProcessor(processor, axisName));
teichmann@7040:             }
teichmann@7040:             catch (ClassNotFoundException cnfe) {
teichmann@7040:                 log.error(cnfe, cnfe);
teichmann@7040:             }
teichmann@7040:             catch (InstantiationException ie) {
teichmann@7040:                 log.error(ie, ie);
teichmann@7040:             }
teichmann@7040:             catch (IllegalAccessException ia) {
teichmann@7040:                 log.error(ia, ia);
teichmann@7040:             }
teichmann@7040:             catch (ClassCastException cce) {
teichmann@7040:                 log.error(cce, cce);
teichmann@7040:             }
teichmann@7040:         }
teichmann@7040:     }
teichmann@7048: 
teichmann@7048:     private void parseTitle(Element config) {
teichmann@7048:         title = extractTitle(config, "title");
teichmann@7048:     }
teichmann@7048: 
teichmann@7048:     private void parseSubtitle(Element config) {
teichmann@7048:         subtitle = extractTitle(config, "subtitle");
teichmann@7048:     }
teichmann@7048: 
teichmann@7048:     private static Title extractTitle(Element config, String tagName) {
teichmann@7048:         NodeList titleNodes = config.getElementsByTagName(tagName);
teichmann@7048:         if (titleNodes.getLength() < 1) {
teichmann@7048:             return null;
teichmann@7048:         }
teichmann@7048:         Element titleElement = (Element)titleNodes.item(0);
teichmann@7048:         String key = titleElement.getAttribute("key");
teichmann@7048:         String def = titleElement.getAttribute("default");
teichmann@7048:         Title title = new Title(key, def);
teichmann@7048:         NodeList argumentNodes = titleElement.getElementsByTagName("arg");
teichmann@7048:         for (int i = 0, N = argumentNodes.getLength(); i < N; ++i) {
teichmann@7048:             Element argumentElement = (Element)argumentNodes.item(i);
teichmann@7048:             String expression = argumentElement.getAttribute("expr");
teichmann@7048:             String type = argumentElement.getAttribute("type");
teichmann@7048:             title.addArgument(new Argument(expression, type));
teichmann@7048:         }
teichmann@7048:         return title;
teichmann@7048:     }
teichmann@7040: }
teichmann@7040: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :