/*
* Copyright 2004-2023 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (https://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.engine;
import org.h2.message.DbException;
/**
* Modes of generated keys' gathering.
*/
public final class GeneratedKeysMode {
/**
* Generated keys are not needed.
*/
public static final int NONE = 0;
/**
* Generated keys should be configured automatically.
*/
public static final int AUTO = 1;
/**
* Use specified column indices to return generated keys from.
*/
public static final int COLUMN_NUMBERS = 2;
/**
* Use specified column names to return generated keys from.
*/
public static final int COLUMN_NAMES = 3;
/**
* Determines mode of generated keys' gathering.
*
* @param generatedKeysRequest
* {@code null} or {@code false} if generated keys are not
* needed, {@code true} if generated keys should be configured
* automatically, {@code int[]} to specify column indices to
* return generated keys from, or {@code String[]} to specify
* column names to return generated keys from
* @return mode for the specified generated keys request
*/
public static int valueOf(Object generatedKeysRequest) {
if (generatedKeysRequest == null || Boolean.FALSE.equals(generatedKeysRequest)) {
return NONE;
}
if (Boolean.TRUE.equals(generatedKeysRequest)) {
return AUTO;
}
if (generatedKeysRequest instanceof int[]) {
return ((int[]) generatedKeysRequest).length > 0 ? COLUMN_NUMBERS : NONE;
}
if (generatedKeysRequest instanceof String[]) {
return ((String[]) generatedKeysRequest).length > 0 ? COLUMN_NAMES : NONE;
}
throw DbException.getInternalError();
}
private GeneratedKeysMode() {
}
}