org.apache.openjpa.persistence.jdbc.JoinSyntax Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
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package org.apache.openjpa.persistence.jdbc;
import org.apache.openjpa.jdbc.sql.JoinSyntaxes;
/**
* Type of join syntax to use.
*
* @since 1.0.0
* @published
*/
public enum JoinSyntax {
SQL92(JoinSyntaxes.SYNTAX_SQL92),
TRADITIONAL(JoinSyntaxes.SYNTAX_TRADITIONAL),
DATABASE(JoinSyntaxes.SYNTAX_DATABASE);
private final int joinSyntaxConstant;
private JoinSyntax(int value) {
joinSyntaxConstant = value;
}
int toKernelConstant() {
return joinSyntaxConstant;
}
static JoinSyntax fromKernelConstant(int kernelConstant) {
switch (kernelConstant) {
case JoinSyntaxes.SYNTAX_SQL92:
return SQL92;
case JoinSyntaxes.SYNTAX_TRADITIONAL:
return TRADITIONAL;
case JoinSyntaxes.SYNTAX_DATABASE:
return DATABASE;
default:
throw new IllegalArgumentException(kernelConstant + "");
}
}
}