org.hibernate.engine.OptimisticLockStyle.java Source code

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Here is the source code for org.hibernate.engine.OptimisticLockStyle.java

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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.engine;

/**
 * Describes how an entity should be optimistically locked.
 *
 * @author Steve Ebersole
 */
public enum OptimisticLockStyle {
    /**
     * no optimistic locking
     */
    NONE(-1),
    /**
     * use a dedicated version column
     */
    VERSION(0),
    /**
     * dirty columns are compared
     */
    DIRTY(1),
    /**
     * all columns are compared
     */
    ALL(2);

    private final int oldCode;

    private OptimisticLockStyle(int oldCode) {
        this.oldCode = oldCode;
    }

    public int getOldCode() {
        return oldCode;
    }

    /**
     * Given an old code (one of the int constants from Cascade), interpret it as one of the new enums.
     *
     * @param oldCode The old int constant code
     *
     * @return The interpreted enum value
     *
     * @throws IllegalArgumentException If the code did not match any legacy constant.
     */
    public static OptimisticLockStyle interpretOldCode(int oldCode) {
        switch (oldCode) {
        case -1: {
            return NONE;
        }
        case 0: {
            return VERSION;
        }
        case 1: {
            return DIRTY;
        }
        case 2: {
            return ALL;
        }
        default: {
            throw new IllegalArgumentException("Illegal legacy optimistic lock style code :" + oldCode);
        }
        }
    }
}