X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.db.common%2Fsrc%2Forg%2Fsimantics%2Fdb%2Fcommon%2Fvalidation%2FL0Validations.java;fp=bundles%2Forg.simantics.db.common%2Fsrc%2Forg%2Fsimantics%2Fdb%2Fcommon%2Fvalidation%2FL0Validations.java;h=4a8122956d8247dc900d92e0893b031da0881b11;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.db.common/src/org/simantics/db/common/validation/L0Validations.java b/bundles/org.simantics.db.common/src/org/simantics/db/common/validation/L0Validations.java
new file mode 100644
index 000000000..4a8122956
--- /dev/null
+++ b/bundles/org.simantics.db.common/src/org/simantics/db/common/validation/L0Validations.java
@@ -0,0 +1,43 @@
+package org.simantics.db.common.validation;
+
+import org.simantics.databoard.Bindings;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.common.utils.NameUtils;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.layer0.Layer0;
+
+public class L0Validations {
+
+	public static String checkValueType(ReadGraph graph, Resource subject, Resource predicate) throws DatabaseException {
+		if (subject == null)
+			return null;
+		if (predicate == null)
+			return null;
+
+		Layer0 L0 = Layer0.getInstance(graph);
+	    if(graph.isSubrelationOf(predicate, L0.HasProperty)) {
+			Resource object = graph.getPossibleObject(subject, predicate);
+			if(object == null) return null;
+	    	String valueType = graph.getPossibleRelatedValue(predicate, L0.RequiresValueType, Bindings.STRING);
+	    	if(valueType != null) {
+	    		String valueType2 = graph.getPossibleRelatedValue(object, L0.HasValueType, Bindings.STRING);
+	    		if(!valueType.equals(valueType2)) {
+					StringBuilder sb = new StringBuilder()
+					.append("The value type ")
+					.append(valueType)
+					.append(" of predicate ")
+					.append(NameUtils.getSafeName(graph, predicate, true))
+					.append(" does not match the value type ")
+					.append(valueType2)
+					.append(" of object ")
+					.append(NameUtils.getSafeName(graph, object, true))
+					.append(".");
+					return sb.toString();
+	    		}
+	    	}
+	    }
+	    return null;
+	}
+	
+}