X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.objmap2%2Fsrc%2Forg%2Fsimantics%2Fobjmap%2Fgraph%2Frules%2FMappedElementsRule.java;fp=bundles%2Forg.simantics.objmap2%2Fsrc%2Forg%2Fsimantics%2Fobjmap%2Fgraph%2Frules%2FMappedElementsRule.java;h=202c9abc1f2195a7cc717048accb6a520f87efca;hp=0000000000000000000000000000000000000000;hb=969bd23cab98a79ca9101af33334000879fb60c5;hpb=866dba5cd5a3929bbeae85991796acb212338a08

diff --git a/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/rules/MappedElementsRule.java b/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/rules/MappedElementsRule.java
new file mode 100644
index 000000000..202c9abc1
--- /dev/null
+++ b/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/rules/MappedElementsRule.java
@@ -0,0 +1,82 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2013 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.objmap.graph.rules;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+import org.apache.log4j.Logger;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.WriteGraph;
+import org.simantics.objmap.backward.IBackwardMapping;
+import org.simantics.objmap.bidirectional.IBidirectionalMappingRule;
+import org.simantics.objmap.exceptions.MappingException;
+import org.simantics.objmap.forward.IForwardMapping;
+import org.simantics.objmap.graph.rules.domain.IDomainAccessor;
+import org.simantics.objmap.graph.rules.range.IRangeAccessor;
+
+
+/**
+ * A rule that synchronizes collection of elements between
+ * domain and range accessors. Elements are mapped from
+ * between domain and range during the synchronization.
+ * @author Hannu Niemistö
+ */
+public class MappedElementsRule<Domain, Range> implements IBidirectionalMappingRule<Domain, Range> {
+
+    static Logger LOGGER = Logger.getLogger("org.simantics.objmap");
+
+    IDomainAccessor<Domain,Collection<Domain>> domainAccessor;
+    IRangeAccessor<Range,Collection<Range>> rangeAccessor;
+
+    public MappedElementsRule(IDomainAccessor<Domain,Collection<Domain>> domainAccessor,
+            IRangeAccessor<Range,Collection<Range>> rangeAccessor) {
+        this.domainAccessor = domainAccessor;
+        this.rangeAccessor = rangeAccessor;
+    }
+
+    @Override
+    public boolean updateDomain(WriteGraph g, IBackwardMapping<Domain, Range> map,
+            Domain domainElement, Range rangeElement)
+    throws MappingException {
+        LOGGER.info("    MappedElementsRule.updateDomain");
+        // Snapshot the accessed range value for concurrency safety.
+        // NOTE: still assumes that the accessed collection is concurrent or
+        // synchronized for toArray to be atomic.
+        Collection<Range> value = rangeAccessor.get(rangeElement);
+        Object[] rangeSnapshot = value.toArray();
+        ArrayList<Domain> mappedValue = new ArrayList<Domain>(rangeSnapshot.length);
+        for (Object obj : rangeSnapshot)
+            mappedValue.add(map.inverseMap(g, (Range)obj));//map.inverseGet((Range)obj));
+        return domainAccessor.set(g, domainElement, mappedValue);
+    }
+
+    @Override
+    public boolean updateRange(ReadGraph g, IForwardMapping<Domain, Range> map,
+            Domain domainElement, Range rangeElement)
+    throws MappingException {
+        LOGGER.info("    MappedElementsRule.updateRange");
+        Collection<Domain> value = domainAccessor.get(g, domainElement);
+        ArrayList<Range> mappedValue = new ArrayList<Range>(value.size());
+        for(Domain r : value)
+            mappedValue.add(map.map(g, r));//map.get(r));
+        return rangeAccessor.set(rangeElement, mappedValue);
+    }
+    
+    public void createDomain(WriteGraph g, IBackwardMapping<Domain,Range> map, Domain domainElement, Range rangeElement) throws MappingException {
+    	updateDomain(g, map, domainElement, rangeElement);
+    };
+    
+    public void createRange(ReadGraph g, IForwardMapping<Domain,Range> map, Domain domainElement, Range rangeElement) throws MappingException {
+    	updateRange(g, map, domainElement, rangeElement);
+    };
+}