adds initial version of FTR reader

plugins/com.minres.scviewer.database.ftr/src/com/minres/scviewer/database/ftr/TxRelation.java

@@ -0,0 +1,69 @@
+/*******************************************************************************
+ * Copyright (c) 2020 MINRES Technologies GmbH and others.
+ * 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:
+ *     MINRES Technologies GmbH - initial API and implementation
+ *******************************************************************************/
+package com.minres.scviewer.database.ftr;
+
+import com.minres.scviewer.database.RelationType;
+import com.minres.scviewer.database.tx.ITx;
+import com.minres.scviewer.database.tx.ITxRelation;
+
+/**
+ * The Class TxRelation.
+ */
+class TxRelation implements ITxRelation {
+
+	/** The loader. */
+	final FtrDbLoader loader;
+
+	/** The scv relation. */
+	final FtrRelation scvRelation;
+
+	/**
+	 * Instantiates a new tx relation.
+	 *
+	 * @param loader      the loader
+	 * @param scvRelation the scv relation
+	 */
+	public TxRelation(FtrDbLoader loader, FtrRelation scvRelation) {
+		this.loader = loader;
+		this.scvRelation = scvRelation;
+	}
+
+	/**
+	 * Gets the relation type.
+	 *
+	 * @return the relation type
+	 */
+	@Override
+	public RelationType getRelationType() {
+		return scvRelation.relationType;
+	}
+
+	/**
+	 * Gets the source.
+	 *
+	 * @return the source
+	 */
+	@Override
+	public ITx getSource() {
+		return loader.getTransaction(scvRelation.source);
+	}
+
+	/**
+	 * Gets the target.
+	 *
+	 * @return the target
+	 */
+	@Override
+	public ITx getTarget() {
+		return loader.getTransaction(scvRelation.target);
+	}
+
+}