SampleViews.java

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 2002-2005
 *      Sleepycat Software.  All rights reserved.
 *
 * $Id: SampleViews.java,v 12.2 2005/06/16 20:22:41 bostic Exp $
 */

package collections.ship.sentity;

import com.sleepycat.bind.EntityBinding;
import com.sleepycat.bind.EntryBinding;
import com.sleepycat.bind.serial.ClassCatalog;
import com.sleepycat.bind.serial.TupleSerialBinding;
import com.sleepycat.bind.tuple.TupleBinding;
import com.sleepycat.bind.tuple.TupleInput;
import com.sleepycat.bind.tuple.TupleOutput;
import com.sleepycat.collections.StoredSortedMap;
import com.sleepycat.collections.StoredSortedValueSet;

public class SampleViews {

    private StoredSortedMap partMap;
    private StoredSortedMap supplierMap;
    private StoredSortedMap shipmentMap;
    private StoredSortedMap shipmentByPartMap;
    private StoredSortedMap shipmentBySupplierMap;
    private StoredSortedMap supplierByCityMap;

    public SampleViews(SampleDatabase db) {

        // Create the data bindings.
        // In this sample, EntityBinding classes are used to bind the stored
        // key/data entry pair to a combined data object; a "tricky" binding
        // that uses transient fields is used--see PartBinding, etc, for
        // details.  For keys, a one-to-one binding is implemented with
        // EntryBinding classes to bind the stored tuple entry to a key Object.
        //
        ClassCatalog catalog = db.getClassCatalog();
        EntryBinding partKeyBinding =
            new PartKeyBinding();
        EntityBinding partDataBinding =
            new PartBinding(catalog, Part.class);
        EntryBinding supplierKeyBinding =
            new SupplierKeyBinding();
        EntityBinding supplierDataBinding =
            new SupplierBinding(catalog, Supplier.class);
        EntryBinding shipmentKeyBinding =
            new ShipmentKeyBinding();
        EntityBinding shipmentDataBinding =
            new ShipmentBinding(catalog, Shipment.class);
        EntryBinding cityKeyBinding =
            TupleBinding.getPrimitiveBinding(String.class);

        // Create map views for all stores and indices.
        // StoredSortedMap is used since the stores and indices are ordered
        // (they use the DB_BTREE access method).
        //
        partMap =
            new StoredSortedMap(db.getPartDatabase(),
                                partKeyBinding, partDataBinding, true);
        supplierMap =
            new StoredSortedMap(db.getSupplierDatabase(),
                                supplierKeyBinding, supplierDataBinding, true);
        shipmentMap =
            new StoredSortedMap(db.getShipmentDatabase(),
                                shipmentKeyBinding, shipmentDataBinding, true);
        shipmentByPartMap =
            new StoredSortedMap(db.getShipmentByPartDatabase(),
                                partKeyBinding, shipmentDataBinding, true);
        shipmentBySupplierMap =
            new StoredSortedMap(db.getShipmentBySupplierDatabase(),
                                supplierKeyBinding, shipmentDataBinding, true);
        supplierByCityMap =
            new StoredSortedMap(db.getSupplierByCityDatabase(),
                                cityKeyBinding, supplierDataBinding, true);
    }

    // The views returned below can be accessed using the java.util.Map or
    // java.util.Set interfaces, or using the StoredSortedMap and
    // StoredValueSet classes, which provide additional methods.  The entity
    // sets could be obtained directly from the Map.values() method but
    // convenience methods are provided here to return them in order to avoid
    // down-casting elsewhere.

    public StoredSortedMap getPartMap() {

        return partMap;
    }

    public StoredSortedMap getSupplierMap() {

        return supplierMap;
    }

    public StoredSortedMap getShipmentMap() {

        return shipmentMap;
    }

    public StoredSortedValueSet getPartSet() {

        return (StoredSortedValueSet) partMap.values();
    }

    public StoredSortedValueSet getSupplierSet() {

        return (StoredSortedValueSet) supplierMap.values();
    }

    public StoredSortedValueSet getShipmentSet() {

        return (StoredSortedValueSet) shipmentMap.values();
    }

    public StoredSortedMap getShipmentByPartMap() {

        return shipmentByPartMap;
    }

    public StoredSortedMap getShipmentBySupplierMap() {

        return shipmentBySupplierMap;
    }

    public final StoredSortedMap getSupplierByCityMap() {

        return supplierByCityMap;
    }

    private static class PartKeyBinding extends TupleBinding {

        private PartKeyBinding() {
        }

        public Object entryToObject(TupleInput input) {

            String number = input.readString();
            return new PartKey(number);
        }

        public void objectToEntry(Object object, TupleOutput output) {

            PartKey key = (PartKey) object;
            output.writeString(key.getNumber());
        }
    }

    private static class PartBinding extends TupleSerialBinding {

        private PartBinding(ClassCatalog classCatalog, Class dataClass) {

            super(classCatalog, dataClass);
        }

        public Object entryToObject(TupleInput keyInput, Object dataInput) {

            String number = keyInput.readString();
            Part part = (Part) dataInput;
            part.setKey(number);
            return part;
        }

        public void objectToKey(Object object, TupleOutput output) {

            Part part = (Part) object;
            output.writeString(part.getNumber());
        }

        public Object objectToData(Object object) {

            return object;
        }
    }

    private static class SupplierKeyBinding extends TupleBinding {

        private SupplierKeyBinding() {
        }

        public Object entryToObject(TupleInput input) {

            String number = input.readString();
            return new SupplierKey(number);
        }

        public void objectToEntry(Object object, TupleOutput output) {

            SupplierKey key = (SupplierKey) object;
            output.writeString(key.getNumber());
        }
    }

    private static class SupplierBinding extends TupleSerialBinding {

        private SupplierBinding(ClassCatalog classCatalog, Class dataClass) {

            super(classCatalog, dataClass);
        }

        public Object entryToObject(TupleInput keyInput, Object dataInput) {

            String number = keyInput.readString();
            Supplier supplier = (Supplier) dataInput;
            supplier.setKey(number);
            return supplier;
        }

        public void objectToKey(Object object, TupleOutput output) {

            Supplier supplier = (Supplier) object;
            output.writeString(supplier.getNumber());
        }

        public Object objectToData(Object object) {

            return object;
        }
    }

    private static class ShipmentKeyBinding extends TupleBinding {

        private ShipmentKeyBinding() {
        }

        public Object entryToObject(TupleInput input) {

            String partNumber = input.readString();
            String supplierNumber = input.readString();
            return new ShipmentKey(partNumber, supplierNumber);
        }

        public void objectToEntry(Object object, TupleOutput output) {

            ShipmentKey key = (ShipmentKey) object;
            output.writeString(key.getPartNumber());
            output.writeString(key.getSupplierNumber());
        }
    }

    private static class ShipmentBinding extends TupleSerialBinding {

        private ShipmentBinding(ClassCatalog classCatalog, Class dataClass) {

            super(classCatalog, dataClass);
        }

        public Object entryToObject(TupleInput keyInput, Object dataInput) {

            String partNumber = keyInput.readString();
            String supplierNumber = keyInput.readString();
            Shipment shipment = (Shipment) dataInput;
            shipment.setKey(partNumber, supplierNumber);
            return shipment;
        }

        public void objectToKey(Object object, TupleOutput output) {

            Shipment shipment = (Shipment) object;
            output.writeString(shipment.getPartNumber());
            output.writeString(shipment.getSupplierNumber());
        }

        public Object objectToData(Object object) {

            return object;
        }
    }
}

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