#28 Adapt Chronograph for Passage Operator

Rework "Structure" to "Storage"

Signed-off-by: Alexander Fedorov <alexander.fedorov@arsysop.ru>

bundles/org.eclipse.chronograph.api/src/org/eclipse/chronograph/internal/api/data/Storage.java

@@ -0,0 +1,73 @@
+/*******************************************************************************
+ * Copyright (c) 2020 ArSysOp
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * https://www.eclipse.org/legal/epl-2.0/.
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     ArSysOp - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.chronograph.internal.api.data;
+
+import java.util.function.Function;
+import java.util.function.Predicate;
+
+/**
+ * 
+ * Provides access to a remote storage with data objects
+ *
+ */
+public interface Storage {
+
+	/**
+	 * Provides function to retrieve domain objects of the given type with given
+	 * predicate from the remote storage
+	 * 
+	 * @param <I>
+	 * @param type
+	 * @return
+	 */
+	<I> Function<Predicate<I>, Iterable<I>> data(Class<I> type);
+
+	/**
+	 * Identification function for the
+	 * 
+	 * @param <D>
+	 * @param type
+	 * @return
+	 */
+	<D> Function<D, String> identification(Class<D> type);
+
+	/**
+	 * "Content" function for the given input to use for grouping
+	 * 
+	 * @param <P>
+	 * @param <C>
+	 * @param parent
+	 * @param child
+	 * @return
+	 */
+	<P, C> Function<P, Iterable<C>> content(Class<P> parent, Class<C> child);
+
+	/**
+	 * Start pointer function to use for representation
+	 * 
+	 * @param <D>
+	 * @param type
+	 * @return
+	 */
+	<D> Function<D, Integer> start(Class<D> type);
+
+	/**
+	 * End pointer function to use for representation
+	 * 
+	 * @param <D>
+	 * @param type
+	 * @return
+	 */
+	<D> Function<D, Integer> end(Class<D> type);
+
+}