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425 lines
14 KiB
Java
425 lines
14 KiB
Java
/*-
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* Copyright (C) 2002, 2017, Oracle and/or its affiliates. All rights reserved.
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*
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* This file was distributed by Oracle as part of a version of Oracle Berkeley
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* DB Java Edition made available at:
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*
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* http://www.oracle.com/technetwork/database/database-technologies/berkeleydb/downloads/index.html
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*
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* Please see the LICENSE file included in the top-level directory of the
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* appropriate version of Oracle Berkeley DB Java Edition for a copy of the
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* license and additional information.
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*/
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package collections.ship.sentity;
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import com.sleepycat.bind.EntityBinding;
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import com.sleepycat.bind.EntryBinding;
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import com.sleepycat.bind.serial.ClassCatalog;
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import com.sleepycat.bind.serial.TupleSerialBinding;
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import com.sleepycat.bind.tuple.TupleBinding;
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import com.sleepycat.bind.tuple.TupleInput;
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import com.sleepycat.bind.tuple.TupleOutput;
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import com.sleepycat.collections.StoredSortedMap;
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import com.sleepycat.collections.StoredSortedValueSet;
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/**
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* SampleViews defines the data bindings and collection views for the sample
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* database.
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*
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* @author Mark Hayes
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*/
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public class SampleViews {
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private StoredSortedMap partMap;
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private StoredSortedMap supplierMap;
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private StoredSortedMap shipmentMap;
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private StoredSortedMap shipmentByPartMap;
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private StoredSortedMap shipmentBySupplierMap;
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private StoredSortedMap supplierByCityMap;
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/**
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* Create the data bindings and collection views.
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*/
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public SampleViews(SampleDatabase db) {
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// Create the data bindings.
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// In this sample, EntityBinding classes are used to bind the stored
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// key/data entry pair to a combined data object; a "tricky" binding
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// that uses transient fields is used--see PartBinding, etc, for
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// details. For keys, a one-to-one binding is implemented with
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// EntryBinding classes to bind the stored tuple entry to a key Object.
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//
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ClassCatalog catalog = db.getClassCatalog();
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EntryBinding partKeyBinding =
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new PartKeyBinding();
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EntityBinding partDataBinding =
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new PartBinding(catalog, Part.class);
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EntryBinding supplierKeyBinding =
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new SupplierKeyBinding();
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EntityBinding supplierDataBinding =
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new SupplierBinding(catalog, Supplier.class);
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EntryBinding shipmentKeyBinding =
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new ShipmentKeyBinding();
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EntityBinding shipmentDataBinding =
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new ShipmentBinding(catalog, Shipment.class);
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EntryBinding cityKeyBinding =
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TupleBinding.getPrimitiveBinding(String.class);
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// Create map views for all stores and indices.
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// StoredSortedMap is used since the stores and indices are ordered
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// (they use the DB_BTREE access method).
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//
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partMap =
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new StoredSortedMap(db.getPartDatabase(),
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partKeyBinding, partDataBinding, true);
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supplierMap =
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new StoredSortedMap(db.getSupplierDatabase(),
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supplierKeyBinding, supplierDataBinding, true);
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shipmentMap =
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new StoredSortedMap(db.getShipmentDatabase(),
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shipmentKeyBinding, shipmentDataBinding, true);
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shipmentByPartMap =
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new StoredSortedMap(db.getShipmentByPartDatabase(),
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partKeyBinding, shipmentDataBinding, true);
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shipmentBySupplierMap =
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new StoredSortedMap(db.getShipmentBySupplierDatabase(),
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supplierKeyBinding, shipmentDataBinding, true);
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supplierByCityMap =
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new StoredSortedMap(db.getSupplierByCityDatabase(),
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cityKeyBinding, supplierDataBinding, true);
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}
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// The views returned below can be accessed using the java.util.Map or
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// java.util.Set interfaces, or using the StoredSortedMap and
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// StoredValueSet classes, which provide additional methods. The entity
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// sets could be obtained directly from the Map.values() method but
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// convenience methods are provided here to return them in order to avoid
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// down-casting elsewhere.
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/**
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* Return a map view of the part storage container.
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*/
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public StoredSortedMap getPartMap() {
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return partMap;
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}
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/**
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* Return a map view of the supplier storage container.
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*/
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public StoredSortedMap getSupplierMap() {
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return supplierMap;
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}
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/**
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* Return a map view of the shipment storage container.
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*/
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public StoredSortedMap getShipmentMap() {
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return shipmentMap;
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}
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/**
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* Return an entity set view of the part storage container.
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*/
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public StoredSortedValueSet getPartSet() {
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return (StoredSortedValueSet) partMap.values();
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}
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/**
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* Return an entity set view of the supplier storage container.
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*/
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public StoredSortedValueSet getSupplierSet() {
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return (StoredSortedValueSet) supplierMap.values();
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}
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/**
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* Return an entity set view of the shipment storage container.
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*/
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public StoredSortedValueSet getShipmentSet() {
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return (StoredSortedValueSet) shipmentMap.values();
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}
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/**
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* Return a map view of the shipment-by-part index.
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*/
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public StoredSortedMap getShipmentByPartMap() {
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return shipmentByPartMap;
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}
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/**
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* Return a map view of the shipment-by-supplier index.
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*/
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public StoredSortedMap getShipmentBySupplierMap() {
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return shipmentBySupplierMap;
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}
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/**
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* Return a map view of the supplier-by-city index.
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*/
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public final StoredSortedMap getSupplierByCityMap() {
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return supplierByCityMap;
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}
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/**
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* PartKeyBinding is used to bind the stored key tuple entry for a part to
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* a key object representation.
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*/
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private static class PartKeyBinding extends TupleBinding {
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/**
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* Construct the binding object.
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*/
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private PartKeyBinding() {
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}
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/**
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* Create the key object from the stored key tuple entry.
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*/
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public Object entryToObject(TupleInput input) {
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String number = input.readString();
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return new PartKey(number);
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}
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/**
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* Create the stored key tuple entry from the key object.
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*/
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public void objectToEntry(Object object, TupleOutput output) {
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PartKey key = (PartKey) object;
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output.writeString(key.getNumber());
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}
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}
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/**
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* PartBinding is used to bind the stored key/data entry pair for a part
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* to a combined data object (entity).
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*
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* <p> The binding is "tricky" in that it uses the Part class for both the
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* stored data entry and the combined entity object. To do this, Part's
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* key field(s) are transient and are set by the binding after the data
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* object has been deserialized. This avoids the use of a PartData class
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* completely. </p>
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*/
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private static class PartBinding extends TupleSerialBinding {
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/**
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* Construct the binding object.
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*/
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private PartBinding(ClassCatalog classCatalog, Class dataClass) {
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super(classCatalog, dataClass);
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}
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/**
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* Create the entity by combining the stored key and data.
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* This "tricky" binding returns the stored data as the entity, but
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* first it sets the transient key fields from the stored key.
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*/
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public Object entryToObject(TupleInput keyInput, Object dataInput) {
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String number = keyInput.readString();
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Part part = (Part) dataInput;
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part.setKey(number);
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return part;
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}
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/**
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* Create the stored key from the entity.
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*/
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public void objectToKey(Object object, TupleOutput output) {
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Part part = (Part) object;
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output.writeString(part.getNumber());
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}
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/**
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* Return the entity as the stored data. There is nothing to do here
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* since the entity's key fields are transient.
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*/
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public Object objectToData(Object object) {
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return object;
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}
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}
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/**
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* SupplierKeyBinding is used to bind the stored key tuple entry for a
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* supplier to a key object representation.
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*/
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private static class SupplierKeyBinding extends TupleBinding {
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/**
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* Construct the binding object.
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*/
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private SupplierKeyBinding() {
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}
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/**
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* Create the key object from the stored key tuple entry.
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*/
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public Object entryToObject(TupleInput input) {
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String number = input.readString();
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return new SupplierKey(number);
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}
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/**
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* Create the stored key tuple entry from the key object.
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*/
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public void objectToEntry(Object object, TupleOutput output) {
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SupplierKey key = (SupplierKey) object;
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output.writeString(key.getNumber());
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}
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}
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/**
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* SupplierBinding is used to bind the stored key/data entry pair for a
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* supplier to a combined data object (entity).
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*
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* <p> The binding is "tricky" in that it uses the Supplier class for both
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* the stored data entry and the combined entity object. To do this,
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* Supplier's key field(s) are transient and are set by the binding after
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* the data object has been deserialized. This avoids the use of a
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* SupplierData class completely. </p>
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*/
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private static class SupplierBinding extends TupleSerialBinding {
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/**
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* Construct the binding object.
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*/
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private SupplierBinding(ClassCatalog classCatalog, Class dataClass) {
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super(classCatalog, dataClass);
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}
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/**
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* Create the entity by combining the stored key and data.
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* This "tricky" binding returns the stored data as the entity, but
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* first it sets the transient key fields from the stored key.
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*/
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public Object entryToObject(TupleInput keyInput, Object dataInput) {
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String number = keyInput.readString();
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Supplier supplier = (Supplier) dataInput;
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supplier.setKey(number);
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return supplier;
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}
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/**
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* Create the stored key from the entity.
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*/
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public void objectToKey(Object object, TupleOutput output) {
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Supplier supplier = (Supplier) object;
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output.writeString(supplier.getNumber());
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}
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/**
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* Return the entity as the stored data. There is nothing to do here
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* since the entity's key fields are transient.
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*/
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public Object objectToData(Object object) {
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return object;
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}
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}
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/**
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* ShipmentKeyBinding is used to bind the stored key tuple entry for a
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* shipment to a key object representation.
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*/
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private static class ShipmentKeyBinding extends TupleBinding {
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/**
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* Construct the binding object.
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*/
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private ShipmentKeyBinding() {
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}
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/**
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* Create the key object from the stored key tuple entry.
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*/
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public Object entryToObject(TupleInput input) {
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String partNumber = input.readString();
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String supplierNumber = input.readString();
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return new ShipmentKey(partNumber, supplierNumber);
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}
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/**
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* Create the stored key tuple entry from the key object.
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*/
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public void objectToEntry(Object object, TupleOutput output) {
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ShipmentKey key = (ShipmentKey) object;
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output.writeString(key.getPartNumber());
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output.writeString(key.getSupplierNumber());
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}
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}
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/**
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* ShipmentBinding is used to bind the stored key/data entry pair for a
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* shipment to a combined data object (entity).
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*
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* <p> The binding is "tricky" in that it uses the Shipment class for both
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* the stored data entry and the combined entity object. To do this,
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* Shipment's key field(s) are transient and are set by the binding after
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* the data object has been deserialized. This avoids the use of a
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* ShipmentData class completely. </p>
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*/
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private static class ShipmentBinding extends TupleSerialBinding {
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/**
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* Construct the binding object.
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*/
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private ShipmentBinding(ClassCatalog classCatalog, Class dataClass) {
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super(classCatalog, dataClass);
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}
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/**
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* Create the entity by combining the stored key and data.
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* This "tricky" binding returns the stored data as the entity, but
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* first it sets the transient key fields from the stored key.
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*/
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public Object entryToObject(TupleInput keyInput, Object dataInput) {
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String partNumber = keyInput.readString();
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String supplierNumber = keyInput.readString();
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Shipment shipment = (Shipment) dataInput;
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shipment.setKey(partNumber, supplierNumber);
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return shipment;
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}
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/**
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* Create the stored key from the entity.
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*/
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public void objectToKey(Object object, TupleOutput output) {
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Shipment shipment = (Shipment) object;
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output.writeString(shipment.getPartNumber());
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output.writeString(shipment.getSupplierNumber());
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}
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/**
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* Return the entity as the stored data. There is nothing to do here
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* since the entity's key fields are transient.
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*/
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public Object objectToData(Object object) {
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return object;
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}
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}
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}
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