X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.diagram%2Fsrc%2Forg%2Fsimantics%2Fdiagram%2Fflag%2FFlagLabelModifier.java;fp=bundles%2Forg.simantics.diagram%2Fsrc%2Forg%2Fsimantics%2Fdiagram%2Fflag%2FFlagLabelModifier.java;h=1d5c7a669f89091ed7e821be2d9b3b9835eb6fa4;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/flag/FlagLabelModifier.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/flag/FlagLabelModifier.java
new file mode 100644
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+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/flag/FlagLabelModifier.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.diagram.flag;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+import org.simantics.databoard.Bindings;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.common.primitiverequest.OrderedSet;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.layer0.adapter.AbstractStringModifier;
+import org.simantics.diagram.stubs.DiagramResource;
+import org.simantics.layer0.Layer0;
+import org.simantics.layer0.utils.binaryPredicates.OrderedSetElementsPredicate;
+
+/**
+ * Makes sure that two things apply:
+ * <ol>
+ * <li>If a flag is joined with another flag, both flags must have the same label property</li>
+ * <li>A flag's label is unique within its own diagram</li>
+ * </ol> 
+ * @author Tuukka Lehtonen
+ */
+public final class FlagLabelModifier extends AbstractStringModifier {
+
+    private Resource             ownerFlag;
+    private Resource             relation;
+    @SuppressWarnings("unused")
+    private Resource             property;
+    private Collection<Resource> diagrams = Collections.emptySet();
+    private Set<String>          originalLabels = new HashSet<String>();
+    private Set<String>          labelsInUse = Collections.emptySet();
+
+    public FlagLabelModifier(ReadGraph graph, Resource flag, Resource relation, Resource label) throws DatabaseException {
+    	super(label);
+        this.ownerFlag = flag;
+        this.relation = relation;
+        this.property = label;
+        initialize(graph);
+    }
+    	
+    private void initialize(ReadGraph graph) throws DatabaseException {
+        if (ownerFlag != null) {
+            diagrams = OrderedSetElementsPredicate.INSTANCE.getSubjects(graph, ownerFlag);
+            Resource correspondence = FlagUtil.getPossibleCounterpart(graph, ownerFlag);
+
+            addPossibleLabel(graph, ownerFlag, originalLabels);
+            if (correspondence != null)
+                addPossibleLabel(graph, correspondence, originalLabels);
+        }
+        refreshUsedLabels(graph);
+    }
+
+    private void addPossibleLabel(ReadGraph graph, Resource flag, Set<String> result) throws DatabaseException {
+        String label = graph.getPossibleRelatedValue(flag, Layer0.getInstance(graph).HasLabel, Bindings.STRING);
+        if (label != null && !label.isEmpty())
+            result.add(label);
+    }
+
+    private void refreshUsedLabels(ReadGraph graph) throws DatabaseException {
+        Set<String> used = new HashSet<String>();
+        DiagramResource DIA = DiagramResource.getInstance(graph);
+        for (Resource diagram : diagrams) {
+            for (Resource element : graph.syncRequest(new OrderedSet(diagram))) {
+                if (graph.isInstanceOf(element, DIA.Flag)) {
+                    addPossibleLabel(graph, element, used);
+                }
+            }
+        }
+        //System.out.println("used labels:" + used);
+        //System.out.println("original labels:" + originalLabels);
+        used.removeAll(originalLabels);
+
+        this.labelsInUse = used;
+        //System.out.println("final used labels:" + used);
+    }
+
+    @Override
+    public String isValid(String value) {
+        if (diagrams.isEmpty() || ownerFlag == null)
+            // No diagram or flag for property, cannot verify, therefore don't care.
+            return null;
+
+        if (labelsInUse.contains(value))
+            return "Label is already in use on the same diagram";
+        return null;
+    }
+
+    @Override
+    final public void modify(WriteGraph graph, String value) throws DatabaseException {
+        DiagramResource DIA = DiagramResource.getInstance(graph);
+
+        graph.claimLiteral(ownerFlag, relation, DIA.FlagLabel, value, Bindings.STRING);
+        Resource counterpart = FlagUtil.getPossibleCounterpart(graph, ownerFlag);
+        if (counterpart != null)
+            graph.claimLiteral(counterpart, relation, DIA.FlagLabel, value, Bindings.STRING);
+    }
+
+}