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package org.jooq.meta;

An SPI that can be used to provide a schema version to the jOOQ code
generator.
 If between subsequent meta data accesses, at least one SchemaDefinition's version changes, that schema's CatalogDefinition's version must change as well. In other words, it can be safely assumed that when between two subsequent schema meta data accesses, the CatalogDefinition's version stays the same, all SchemaDefinition's versions have stayed the same as well. 
 A SchemaDefinition is said to be unversioned if version(SchemaDefinition) returns null.
Author:
Lukas Eder
See Also:
CatalogVersionProvider/**
 * An SPI that can be used to provide a schema version to the jOOQ code
 * generator.
 * <p>
 * If between subsequent meta data accesses, at least one
 * {@link SchemaDefinition}'s version changes, that schema's
 * {@link CatalogDefinition}'s version must change as well. In other words, it
 * can be safely assumed that when between two subsequent schema meta data
 * accesses, the {@link CatalogDefinition}'s version stays the same, all
 * {@link SchemaDefinition}'s versions have stayed the same as well.
 * <p>
 * A {@link SchemaDefinition} is said to be unversioned if
 * {@link #version(SchemaDefinition)} returns <code>null</code>.
 *
 * @author Lukas Eder
 * @see CatalogVersionProvider
 */
public interface SchemaVersionProvider {

    
Get a custom schema version.
/**
     * Get a custom schema version.
     */
    String version(SchemaDefinition schema);
}