X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.db.common%2Fsrc%2Forg%2Fsimantics%2Fdb%2Fcommon%2Furi%2FResourceToPossibleURI.java;fp=bundles%2Forg.simantics.db.common%2Fsrc%2Forg%2Fsimantics%2Fdb%2Fcommon%2Furi%2FResourceToPossibleURI.java;h=a8de839131cedd89166b9146f10bd3858fef83b8;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git
diff --git a/bundles/org.simantics.db.common/src/org/simantics/db/common/uri/ResourceToPossibleURI.java b/bundles/org.simantics.db.common/src/org/simantics/db/common/uri/ResourceToPossibleURI.java
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+++ b/bundles/org.simantics.db.common/src/org/simantics/db/common/uri/ResourceToPossibleURI.java
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+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.db.common.uri;
+
+import org.simantics.databoard.Bindings;
+import org.simantics.databoard.util.URIStringUtils;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.common.request.ResourceRead;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.layer0.Layer0;
+
+/**
+ * Tries to retrieve URIs for specified resources. Returns null
if
+ * URI is undefined. This query follows the semantics of
+ * {@link ReadGraph#getPossibleURI(Resource)}.
+ *
+ * @author Antti Villberg
+ */
+public class ResourceToPossibleURI extends ResourceRead {
+
+ public ResourceToPossibleURI(Resource resource) {
+ super(resource);
+ }
+
+ @Override
+ public String perform(ReadGraph g) throws DatabaseException {
+ if(g.getRootLibrary().equals(resource)) return "http:/";
+ Layer0 L0 = Layer0.getInstance(g);
+ String name = g.getPossibleRelatedValue(resource, L0.HasName, Bindings.STRING);
+ if(name == null) return null;
+ String escapedName = URIStringUtils.escape((String) name);
+ Resource parent = g.getPossibleObject(resource, L0.PartOf);
+ if(parent == null) return null;
+ String parentURI = g.syncRequest(new ResourceToPossibleURI(parent));
+ if(parentURI == null) return null;
+ return parentURI + "/" + escapedName;
+ }
+
+}