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118 lines
3.4 KiB
Java
118 lines
3.4 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.marshal;
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import java.io.Serializable;
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import com.sleepycat.bind.tuple.TupleInput;
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import com.sleepycat.bind.tuple.TupleOutput;
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/**
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* A Shipment represents the combined key/data pair for a shipment entity.
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*
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* <p> In this sample, Shipment is bound to the stored key/data entry by
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* implementing the MarshalledEntity interface, which is called by {@link
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* SampleViews.MarshalledEntityBinding}. </p>
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*
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* <p> The binding is "tricky" in that it uses this class for both the stored
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* data entry and the combined entity object. To do this, the key field(s) are
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* transient and are set by the binding after the data object has been
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* deserialized. This avoids the use of a ShipmentData class completely. </p>
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*
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* <p> Since this class is used directly for data storage, it must be
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* Serializable. </p>
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*
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* @author Mark Hayes
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*/
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public class Shipment implements Serializable, MarshalledEntity {
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static final String PART_KEY = "part";
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static final String SUPPLIER_KEY = "supplier";
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private transient String partNumber;
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private transient String supplierNumber;
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private int quantity;
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public Shipment(String partNumber, String supplierNumber, int quantity) {
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this.partNumber = partNumber;
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this.supplierNumber = supplierNumber;
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this.quantity = quantity;
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}
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/**
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* Set the transient key fields after deserializing. This method is only
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* called by data bindings.
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*/
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void setKey(String partNumber, String supplierNumber) {
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this.partNumber = partNumber;
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this.supplierNumber = supplierNumber;
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}
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public final String getPartNumber() {
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return partNumber;
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}
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public final String getSupplierNumber() {
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return supplierNumber;
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}
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public final int getQuantity() {
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return quantity;
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}
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public String toString() {
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return "[Shipment: part=" + partNumber +
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" supplier=" + supplierNumber +
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" quantity=" + quantity + ']';
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}
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// --- MarshalledEntity implementation ---
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Shipment() {
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// A no-argument constructor is necessary only to allow the binding to
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// instantiate objects of this class.
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}
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public void unmarshalPrimaryKey(TupleInput keyInput) {
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this.partNumber = keyInput.readString();
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this.supplierNumber = keyInput.readString();
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}
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public void marshalPrimaryKey(TupleOutput keyOutput) {
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keyOutput.writeString(this.partNumber);
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keyOutput.writeString(this.supplierNumber);
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}
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public boolean marshalSecondaryKey(String keyName, TupleOutput keyOutput) {
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if (keyName.equals(PART_KEY)) {
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keyOutput.writeString(this.partNumber);
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return true;
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} else if (keyName.equals(SUPPLIER_KEY)) {
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keyOutput.writeString(this.supplierNumber);
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return true;
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} else {
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throw new UnsupportedOperationException(keyName);
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}
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}
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}
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