Mercurial > dive4elements > river
view flys-client/src/main/java/de/intevation/flys/client/server/ChartServiceHelper.java @ 1575:0f2b94408bd1
Added further methods to DataFactory to create concrete Data instances.
flys-client/trunk@3841 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Tue, 31 Jan 2012 15:20:17 +0000 |
parents | ab8eb2f544f2 |
children | 1780841d79af |
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package de.intevation.flys.client.server; import java.util.Map; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.apache.log4j.Logger; import de.intevation.artifacts.common.ArtifactNamespaceContext; import de.intevation.artifacts.common.utils.XMLUtils; import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator; /** * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class ChartServiceHelper { private static final Logger logger = Logger.getLogger(ChartServiceHelper.class); /** The default chart width if no value is specified in the request.*/ public static final int DEFAULT_CHART_WIDTH = 600; /** The default chart height if no value is specified in the request.*/ public static final int DEFAULT_CHART_HEIGHT = 400; private ChartServiceHelper() { } /** * This method returns a document which might contain parameters to adjust * chart settings. The document is created using the information that are * contained in the request object. * * @param req The request document. * * @return a document to adjust chart settings. */ protected static Document getChartAttributes(Map<String, String> req) { logger.debug("ChartServiceHelper.getChartAttributes"); Document doc = XMLUtils.newDocument(); ElementCreator ec = new ElementCreator( doc, ArtifactNamespaceContext.NAMESPACE_URI, ArtifactNamespaceContext.NAMESPACE_PREFIX); Element attributes = ec.create("attributes"); appendChartSize(req, attributes, ec); appendFormat(req, attributes, ec); appendXRange(req, attributes, ec); appendYRange(req, attributes, ec); doc.appendChild(attributes); return doc; } /** * This method extracts the size (width/height) of a chart from request * object and append those values - if they exist - to the attribute * document used to adjust chart settings. * * @param req The request object that might contain the chart size. * @param attributes The attributes element used to adjust chart settings. * @param ec The ElementCreator that might be used to create new Elements. */ protected static void appendChartSize( Map<String, String> req, Element attributes, ElementCreator ec) { logger.debug("ChartServiceHelper.appendChartSize"); Element size = ec.create("size"); String width = req.get("width"); String height = req.get("height"); if (width == null || height == null) { width = String.valueOf(DEFAULT_CHART_WIDTH); height = String.valueOf(DEFAULT_CHART_HEIGHT); } ec.addAttr(size, "width", width, true); ec.addAttr(size, "height", height, true); attributes.appendChild(size); } /** * This method extracts the x range for the chart from request object and * appends those range - if it exists - to the attribute document used to * adjust the chart settings. * * @param req The request object that might contain the chart size. * @param doc The attribute document used to adjust chart settings. * @param ec The ElementCreator that might be used to create new Elements. */ protected static void appendXRange( Map<String, String> req, Element attributes, ElementCreator ec) { logger.debug("ChartServiceHelper.appendXRange"); Element range = ec.create("xrange"); String from = req.get("minx"); String to = req.get("maxx"); if (from != null && to != null) { ec.addAttr(range, "from", from, true); ec.addAttr(range, "to", to, true); attributes.appendChild(range); } } /** * This method extracts the x range for the chart from request object and * appends those range - if it exists - to the attribute document used to * adjust the chart settings. * * @param req The request object that might contain the chart size. * @param doc The attribute document used to adjust chart settings. * @param ec The ElementCreator that might be used to create new Elements. */ protected static void appendYRange( Map<String, String> req, Element attributes, ElementCreator ec) { logger.debug("ChartServiceHelper.appendYRange"); Element range = ec.create("yrange"); String from = req.get("miny"); String to = req.get("maxy"); if (from != null && to != null) { ec.addAttr(range, "from", from, true); ec.addAttr(range, "to", to, true); attributes.appendChild(range); } } /** * This method extracts the format string from request object and appends * those format - if existing - to the attribute document used to adjust * the chart settings. * * @param req The request object that might contain the chart format. * @param doc The attribute document used to adjust chart settings. * @param ec The ElementCreator that might be used to create new Elements. */ protected static void appendFormat( Map<String, String> req, Element attributes, ElementCreator ec ) { logger.debug("ChartServiceHelper.appendFormat"); String formatStr = req.get("format"); if (formatStr == null || formatStr.length() == 0) { return; } Element format = ec.create("format"); ec.addAttr(format, "value", formatStr, true); attributes.appendChild(format); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :