Mercurial > dive4elements > framework
comparison artifact-database/src/main/java/de/intevation/artifactdatabase/rest/BaseOutResource.java @ 143:7e20702a90ed
Implemented an abstract class for the output of artifacts and collections. Added a CollectionOutResource.
artifacts/trunk@1368 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
|---|---|
| date | Wed, 02 Mar 2011 16:02:47 +0000 |
| parents | |
| children | b2115f484edb |
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| 142:e986e32bc7d4 | 143:7e20702a90ed |
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| 1 /* | |
| 2 * Copyright (c) 2011 by Intevation GmbH | |
| 3 * | |
| 4 * This program is free software under the LGPL (>=v2.1) | |
| 5 * Read the file LGPL.txt coming with the software for details | |
| 6 * or visit http://www.gnu.org/licenses/ if it does not exist. | |
| 7 */ | |
| 8 package de.intevation.artifactdatabase.rest; | |
| 9 | |
| 10 import de.intevation.artifactdatabase.XMLUtils; | |
| 11 | |
| 12 import de.intevation.artifacts.ArtifactDatabase; | |
| 13 import de.intevation.artifacts.ArtifactDatabaseException; | |
| 14 import de.intevation.artifacts.ArtifactNamespaceContext; | |
| 15 import de.intevation.artifacts.CallMeta; | |
| 16 | |
| 17 import java.io.IOException; | |
| 18 | |
| 19 import org.apache.log4j.Logger; | |
| 20 | |
| 21 import org.restlet.Request; | |
| 22 import org.restlet.Response; | |
| 23 | |
| 24 import org.restlet.data.MediaType; | |
| 25 import org.restlet.data.Status; | |
| 26 | |
| 27 import org.restlet.ext.xml.DomRepresentation; | |
| 28 | |
| 29 import org.restlet.representation.EmptyRepresentation; | |
| 30 import org.restlet.representation.Representation; | |
| 31 | |
| 32 import org.restlet.resource.ResourceException; | |
| 33 | |
| 34 import org.w3c.dom.Document; | |
| 35 | |
| 36 | |
| 37 /** | |
| 38 * Base Resource to serve the out()-outputs of collections and artifacts. | |
| 39 * | |
| 40 * @author <a href="mailto:ingo.weinzierl@intevation">Ingo Weinzierl</a> | |
| 41 */ | |
| 42 public abstract class BaseOutResource | |
| 43 extends BaseResource | |
| 44 { | |
| 45 /** The logger used in this class.*/ | |
| 46 private static Logger logger = Logger.getLogger(BaseOutResource.class); | |
| 47 | |
| 48 /** XPath to figure out the MIME type of the requested result.*/ | |
| 49 public static final String XPATH_MIME_TYPE = | |
| 50 "/art:action/art:out/art:mime-type/@value"; | |
| 51 | |
| 52 /** Default result MIME type: octet stream.*/ | |
| 53 public static final MediaType DEFAULT_MIME_TYPE = | |
| 54 MediaType.APPLICATION_OCTET_STREAM; | |
| 55 | |
| 56 | |
| 57 @Override | |
| 58 protected Representation innerPost(Representation requestRepr) | |
| 59 throws ResourceException | |
| 60 { | |
| 61 Document inputDocument = null; | |
| 62 | |
| 63 try { | |
| 64 DomRepresentation input = new DomRepresentation(requestRepr); | |
| 65 input.setNamespaceAware(true); | |
| 66 inputDocument = input.getDocument(); | |
| 67 } | |
| 68 catch (IOException ioe) { | |
| 69 logger.error(ioe.getMessage()); | |
| 70 Response response = getResponse(); | |
| 71 response.setStatus(Status.CLIENT_ERROR_BAD_REQUEST, ioe); | |
| 72 return new EmptyRepresentation(); | |
| 73 } | |
| 74 | |
| 75 ArtifactDatabase db = getArtifactDatabase(); | |
| 76 | |
| 77 Request request = getRequest(); | |
| 78 | |
| 79 String identifier = getIdentifier(); | |
| 80 | |
| 81 if (logger.isDebugEnabled()) { | |
| 82 logger.debug("looking for artifact id '" + identifier + "'"); | |
| 83 } | |
| 84 | |
| 85 String mimeTypeString = XMLUtils.xpathString( | |
| 86 inputDocument, | |
| 87 XPATH_MIME_TYPE, | |
| 88 ArtifactNamespaceContext.INSTANCE); | |
| 89 | |
| 90 MediaType mimeType = DEFAULT_MIME_TYPE; | |
| 91 | |
| 92 if (mimeTypeString != null && mimeTypeString.length() != 0) { | |
| 93 try { | |
| 94 mimeType = MediaType.valueOf(mimeTypeString); | |
| 95 } | |
| 96 catch (Exception e) { | |
| 97 logger.error(e.getLocalizedMessage()); | |
| 98 } | |
| 99 } | |
| 100 | |
| 101 try { | |
| 102 return new OutRepresentation( | |
| 103 mimeType, | |
| 104 doOut(identifier, inputDocument, db, getCallMeta())); | |
| 105 } | |
| 106 catch (ArtifactDatabaseException adbe) { | |
| 107 Response response = getResponse(); | |
| 108 response.setStatus( | |
| 109 Status.CLIENT_ERROR_NOT_FOUND, adbe.getMessage()); | |
| 110 return new EmptyRepresentation(); | |
| 111 } | |
| 112 } | |
| 113 | |
| 114 /** | |
| 115 * Returns the identifier of the artifact or collection. | |
| 116 * | |
| 117 * @return the identifier. | |
| 118 */ | |
| 119 protected abstract String getIdentifier(); | |
| 120 | |
| 121 /** | |
| 122 * This method is called to process the operation on artifacts or | |
| 123 * collections. | |
| 124 * | |
| 125 * @param identifier The identifier of the artifact or collection. | |
| 126 * @param input The input document of the request. | |
| 127 * @param db The artifact database. | |
| 128 * @param meta The CallMeta object. | |
| 129 * | |
| 130 * @return the result of the operation. | |
| 131 */ | |
| 132 protected abstract ArtifactDatabase.DeferredOutput doOut( | |
| 133 String identifier, | |
| 134 Document input, | |
| 135 ArtifactDatabase db, | |
| 136 CallMeta meta) | |
| 137 throws ArtifactDatabaseException; | |
| 138 } | |
| 139 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |