Mercurial > dive4elements > river
diff flys-client/src/main/java/de/intevation/flys/client/server/GetArtifactServiceImpl.java @ 221:f03c34bec364
Added a new service to query an artifact description.
flys-client/trunk@1666 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Tue, 12 Apr 2011 07:56:33 +0000 |
parents | |
children | 924da6695800 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-client/src/main/java/de/intevation/flys/client/server/GetArtifactServiceImpl.java Tue Apr 12 07:56:33 2011 +0000 @@ -0,0 +1,74 @@ +package de.intevation.flys.client.server; + +import org.w3c.dom.Document; + +import com.google.gwt.user.server.rpc.RemoteServiceServlet; + +import de.intevation.artifacts.common.ArtifactNamespaceContext; +import de.intevation.artifacts.common.utils.ClientProtocolUtils; +import de.intevation.artifacts.common.utils.XMLUtils; + +import de.intevation.artifacts.httpclient.exceptions.ConnectionException; +import de.intevation.artifacts.httpclient.http.HttpClient; +import de.intevation.artifacts.httpclient.http.HttpClientImpl; +import de.intevation.artifacts.httpclient.http.response.DocumentResponseHandler; + +import de.intevation.flys.client.shared.exceptions.ServerException; +import de.intevation.flys.client.shared.model.Artifact; +import de.intevation.flys.client.client.services.GetArtifactService; + + +/** + * This service provides a method that returns an artifact based on its + * identifier. + * + * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> + */ +public class GetArtifactServiceImpl +extends RemoteServiceServlet +implements GetArtifactService +{ + public static final String ERROR_DESCRIBE_ARTIFACT = + "error_describe_artifact"; + + public static final String XPATH_RESULT = "/art:result/text()"; + + public static final String OPERATION_FAILURE = "FAILED"; + + + public Artifact getArtifact(String serverUrl, String uuid, String hash) + throws ServerException + { + Document describe = ClientProtocolUtils.newDescribeDocument( + uuid, hash, true); + + HttpClient client = new HttpClientImpl(serverUrl); + + try { + Document description = (Document) client.describe( + new de.intevation.artifacts.httpclient.objects.Artifact( + uuid, hash), + describe, + new DocumentResponseHandler()); + + if (description == null) { + throw new ServerException(ERROR_DESCRIBE_ARTIFACT); + } + + String result = XMLUtils.xpathString( + description, + XPATH_RESULT, + ArtifactNamespaceContext.INSTANCE); + + if (result == null || !result.equals(OPERATION_FAILURE)) { + return (Artifact) new FLYSArtifactCreator().create(description); + } + } + catch (ConnectionException ce) { + System.err.println(ce.getLocalizedMessage()); + } + + throw new ServerException(ERROR_DESCRIBE_ARTIFACT); + } +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :