--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifact-database/src/main/java/org/dive4elements/artifactdatabase/rest/BaseOutResource.java	Thu Apr 25 10:57:18 2013 +0200
@@ -0,0 +1,150 @@
+/*
+ * Copyright (c) 2011 by Intevation GmbH
+ *
+ * This program is free software under the LGPL (>=v2.1)
+ * Read the file LGPL.txt coming with the software for details
+ * or visit http://www.gnu.org/licenses/ if it does not exist.
+ */
+package de.intevation.artifactdatabase.rest;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.artifacts.ArtifactDatabase;
+import de.intevation.artifacts.ArtifactDatabaseException;
+import de.intevation.artifacts.ArtifactNamespaceContext;
+import de.intevation.artifacts.CallMeta;
+
+import java.io.IOException;
+
+import org.apache.log4j.Logger;
+
+import org.restlet.Request;
+import org.restlet.Response;
+
+import org.restlet.data.MediaType;
+import org.restlet.data.Status;
+
+import org.restlet.ext.xml.DomRepresentation;
+
+import org.restlet.representation.EmptyRepresentation;
+import org.restlet.representation.Representation;
+
+import org.restlet.resource.ResourceException;
+
+import org.w3c.dom.Document;
+
+
+/**
+ * Base Resource to serve the out()-outputs of collections and artifacts.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation">Ingo Weinzierl</a>
+ */
+public abstract class BaseOutResource
+extends               BaseResource
+{
+    /** The logger used in this class.*/
+    private static Logger logger = Logger.getLogger(BaseOutResource.class);
+
+    /** XPath to figure out the MIME type of the requested result.*/
+    public static final String XPATH_MIME_TYPE =
+        "/art:action/art:out/art:mime-type/@value";
+
+    /** Default result MIME type: octet stream.*/
+    public static final MediaType DEFAULT_MIME_TYPE =
+        MediaType.APPLICATION_OCTET_STREAM;
+
+
+    @Override
+    protected Representation innerPost(Representation requestRepr)
+    throws    ResourceException
+    {
+        Document inputDocument = null;
+
+        try {
+            DomRepresentation input = new DomRepresentation(requestRepr);
+            input.setNamespaceAware(true);
+            inputDocument = input.getDocument();
+        }
+        catch (IOException ioe) {
+            logger.error(ioe.getMessage());
+            Response response = getResponse();
+            response.setStatus(Status.CLIENT_ERROR_BAD_REQUEST, ioe);
+            return new EmptyRepresentation();
+        }
+
+        ArtifactDatabase db = getArtifactDatabase();
+
+        Request request = getRequest();
+
+        String identifier = getIdentifier();
+        String outType    = getType();
+
+        if (logger.isDebugEnabled()) {
+            logger.debug("looking for artifact id '" + identifier + "'");
+        }
+
+        String mimeTypeString = XMLUtils.xpathString(
+            inputDocument,
+            XPATH_MIME_TYPE,
+            ArtifactNamespaceContext.INSTANCE);
+
+        MediaType mimeType = DEFAULT_MIME_TYPE;
+
+        if (mimeTypeString != null && mimeTypeString.length() != 0) {
+            try {
+                mimeType = MediaType.valueOf(mimeTypeString);
+            }
+            catch (Exception e) {
+                logger.error(e.getLocalizedMessage());
+            }
+        }
+
+        try {
+            return new OutRepresentation(
+                mimeType,
+                doOut(identifier, outType, inputDocument, db, getCallMeta()));
+        }
+        catch (ArtifactDatabaseException adbe) {
+            Response response = getResponse();
+            response.setStatus(
+                Status.CLIENT_ERROR_NOT_FOUND, adbe.getMessage());
+            return new EmptyRepresentation();
+        }
+    }
+
+    /**
+     * Returns the identifier of the artifact or collection.
+     *
+     * @return the identifier.
+     */
+    protected abstract String getIdentifier();
+
+
+    /**
+     * Returns the concrete output type of the artifact or collection.
+     *
+     * @return the output type.
+     */
+    protected abstract String getType();
+
+    /**
+     * This method is called to process the operation on artifacts or
+     * collections.
+     *
+     * @param identifier The identifier of the artifact or collection.
+     * @param type The output type.
+     * @param input The input document of the request.
+     * @param db The artifact database.
+     * @param meta The CallMeta object.
+     *
+     * @return the result of the operation.
+     */
+    protected abstract ArtifactDatabase.DeferredOutput doOut(
+        String           identifier,
+        String           type,
+        Document         input,
+        ArtifactDatabase db,
+        CallMeta         meta)
+    throws ArtifactDatabaseException;
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :