X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.layer0.utils%2Fsrc%2Forg%2Fsimantics%2Flayer0%2Futils%2Fcollections%2FConditionalList.java;fp=bundles%2Forg.simantics.layer0.utils%2Fsrc%2Forg%2Fsimantics%2Flayer0%2Futils%2Fcollections%2FConditionalList.java;h=2791f9b6c5805915cbb75d0e75a7e51abb09a6a0;hp=0000000000000000000000000000000000000000;hb=969bd23cab98a79ca9101af33334000879fb60c5;hpb=866dba5cd5a3929bbeae85991796acb212338a08

diff --git a/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/collections/ConditionalList.java b/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/collections/ConditionalList.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.layer0.utils.collections;
+
+import java.util.Collection;
+
+import org.simantics.db.Resource;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.layer0.utils.operations.IOperation;
+import org.simantics.layer0.utils.predicates.IUnaryPredicate;
+import org.simantics.utils.datastructures.persistent.IContextMap;
+
+public class ConditionalList implements IContextualList {
+
+	IUnaryPredicate predicate;
+	Resource thenElement;
+	Resource elseElement;
+
+	public ConditionalList(IUnaryPredicate predicate, Resource thenElement,
+			Resource elseElement) {
+		this.predicate = predicate;
+		this.thenElement = thenElement;
+		this.elseElement = elseElement;
+	}
+
+	@Override
+	public void fill(ReadGraph g, IContextMap parameters, Collection<Resource> c) throws DatabaseException {
+		Resource r = (Resource)parameters.get(IOperation.SUBJECT);
+		
+		if(predicate.has(g, r))
+			ContextualListUtils.fill(g, thenElement, parameters, c);
+		else if(elseElement != null)
+			ContextualListUtils.fill(g, elseElement, parameters, c);
+	}
+
+}