Mercurial > dive4elements > river
view flys-client/src/main/java/de/intevation/flys/client/server/FLYSArtifactCreator.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 | f1f0e9c75026 |
children | fe67f1345687 |
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package de.intevation.flys.client.server; import java.util.ArrayList; import java.util.List; import javax.xml.xpath.XPathConstants; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; import org.apache.log4j.Logger; import de.intevation.artifacts.common.utils.XMLUtils; import de.intevation.artifacts.common.ArtifactNamespaceContext; import de.intevation.artifacts.httpclient.utils.ArtifactCreator; import de.intevation.flys.client.shared.model.Artifact; import de.intevation.flys.client.shared.model.CalculationMessage; import de.intevation.flys.client.shared.model.DefaultArtifact; import de.intevation.flys.client.shared.model.WINFOArtifact; import de.intevation.flys.client.shared.model.MapArtifact; import de.intevation.flys.client.shared.model.ChartArtifact; /** * An implementation of an {@link ArtifactCreator}. This class uses the document * that is returned by the artifact server to parse important information (like * uuid, hash) and returns a new {@link Artifact} instance. * * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class FLYSArtifactCreator implements ArtifactCreator { private static final Logger logger = Logger.getLogger(FLYSArtifactCreator.class); /** The XPath to the artifact's uuid.*/ public static final String XPATH_UUID = "/art:result/art:uuid/@art:value"; /** The XPath to the artifact's hash value.*/ public static final String XPATH_HASH = "/art:result/art:hash/@art:value"; /** The XPath to the artifact's name value.*/ public static final String XPATH_NAME = "/art:result/art:name/@art:value"; /** The XPath to the value that determines if the artifact is processing in * background.*/ public static final String XPATH_BACKGROUND_VALUE = "/art:result/art:background-processing/@art:value"; /** The XPath that points to the (if existing) background messages.*/ public static final String XPATH_BACKGROUND = "/art:result/art:background-processing"; /** * Creates a new instance of an {@link ArtifactCreator}. */ public FLYSArtifactCreator() { } /** * This concreate implementation returns an instance of {@link Artifact} * that is used in the FLYS GWT Client code. * * @param doc A document that describes the artifact that has been created * in the artifact server. * * @return an instance if {@link Artifact}. */ public Object create(Document doc) { Artifact artifact = extractArtifact(doc); artifact.setArtifactDescription( ArtifactDescriptionFactory.createArtifactDescription(doc)); return artifact; } /** * This method extracts the UUID und HASH information of the returned * artifact document. * * @param doc The result of the CREATE operation. * * @return an instance of an {@link Artifact}. */ protected Artifact extractArtifact(Document doc) { logger.debug("FLYSArtifactCreator - extractArtifact()"); String uuid = XMLUtils.xpathString( doc, XPATH_UUID, ArtifactNamespaceContext.INSTANCE); String hash = XMLUtils.xpathString( doc, XPATH_HASH, ArtifactNamespaceContext.INSTANCE); String name = XMLUtils.xpathString( doc, XPATH_NAME, ArtifactNamespaceContext.INSTANCE); String backgroundStr = XMLUtils.xpathString( doc, XPATH_BACKGROUND_VALUE, ArtifactNamespaceContext.INSTANCE); boolean background = false; if (backgroundStr != null && backgroundStr.length() > 0) { background = Boolean.valueOf(backgroundStr); } List<CalculationMessage> msg = parseBackgroundMessages(doc); logger.debug("NEW Artifact UUID: " + uuid); logger.debug("NEW Artifact HASH: " + hash); logger.debug("NEW Artifact NAME: " + name); logger.debug("NEW Artifact IN BACKGROUND: " + background); if (name == null) { return new DefaultArtifact(uuid, hash, background, msg); } name = name.trim(); if (name.length() > 0 && name.equals("winfo")) { logger.debug("+++++ NEW WINFO ARTIFACT."); return new WINFOArtifact(uuid, hash, background, msg); } else if (name.length() > 0 && name.equals("new_map")) { logger.debug("+++++ NEW MAP ARTIFACT."); return new MapArtifact(uuid, hash, background, msg); } else if (name.length() > 0 && name.equals("new_chart")) { logger.debug("+++++ NEW CHART ARTIFACT."); return new ChartArtifact(uuid, hash, background, msg); } return new DefaultArtifact(uuid, hash, background, msg); } public static List<CalculationMessage> parseBackgroundMessages(Document d) { NodeList list = (NodeList) XMLUtils.xpath( d, XPATH_BACKGROUND, XPathConstants.NODESET, ArtifactNamespaceContext.INSTANCE); int len = list != null ? list.getLength() : 0; logger.debug("Found " + len + " background messages."); List<CalculationMessage> res = new ArrayList<CalculationMessage>(len); for (int i = 0; i < len; i++) { CalculationMessage msg = parseBackgroundMessage( (Element) list.item(i)); if (msg != null) { res.add(msg); } } return res; } public static CalculationMessage parseBackgroundMessage(Element e) { String steps = e.getAttribute("art:steps"); String currentStep = e.getAttribute("art:currentStep"); String message = e.getTextContent(); int lenCurStep = currentStep != null ? currentStep.length() : 0; int lenSteps = steps != null ? steps.length() : 0; int lenMessage = message != null ? message.length() : 0; if (lenSteps > 0 && lenMessage > 0 && lenCurStep > 0) { try { return new CalculationMessage( Integer.parseInt(steps), Integer.parseInt(currentStep), message); } catch (NumberFormatException nfe) { nfe.printStackTrace(); } } return null; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :