foundation/org.eclipse.persistence.nosql/src/main/java/org/eclipse/persistence/internal/eis/cobol/CobolRedefinedFieldValue.java

/*
 * Copyright (c) 1998, 2020 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0,
 * or the Eclipse Distribution License v. 1.0 which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
 */

// Contributors:
//     Oracle - initial API and implementation from Oracle TopLink
package org.eclipse.persistence.internal.eis.cobol;


/**
* <b>Purpose</b>: to allow on demand conversions of fields which are redefined.  This is
* necessary because different data formats may be used by different fields that redefine the
* same area of a byte array.
*/
public class CobolRedefinedFieldValue {

    /** byte array the represents the data for the record */
    private byte[] myRecordData;

    /** field meta data associated with the redefine */
    FieldMetaData myFieldMetaData;

    public CobolRedefinedFieldValue() {
        initialize();
    }

    public CobolRedefinedFieldValue(FieldMetaData metaData, byte[] recordData) {
        initialize(metaData, recordData);
    }

    protected void initialize(FieldMetaData metaData, byte[] recordData) {
        myRecordData = recordData;
        myFieldMetaData = metaData;
    }

    /**
    * getter for field meta data
    */
    public FieldMetaData getFieldMetaData() {
        return myFieldMetaData;
    }

    /**
    * setter for field meta data
    */
    public void setFieldMetaData(FieldMetaData newFieldMetaData) {
        myFieldMetaData = newFieldMetaData;
    }

    /**
    * getter for record data
    */
    public byte[] getRecordData() {
        return myRecordData;
    }

    /**
    * setter for record data
    */
    public void setRecordData(byte[] newRecordData) {
        myRecordData = newRecordData;
    }

    protected void initialize() {
    }

    /**
    * calculates and extracts the value from the byte array myRecordData
    */
    public Object getValue() {
        return getFieldMetaData().extractValueFromArray(getRecordData());
    }
}