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A Speedment bundle that shades all dependencies into one jar. This is
useful when deploying an application on a server.
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/*
*
* Copyright (c) 2006-2019, Speedment, Inc. All Rights Reserved.
*
* Licensed 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, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.speedment.runtime.join.stage;
import static java.util.Objects.requireNonNull;
/**
*
* @author Per Minborg
*/
public enum JoinType {
INNER_JOIN("INNER JOIN", false, false),
LEFT_JOIN("LEFT JOIN", true, false),
RIGHT_JOIN("RIGHT JOIN", false, true),
//FULL_OUTER_JOIN("FULL OUTER JOIN", true, true),
CROSS_JOIN("CROSS JOIN", false, false);
private final String sql;
private final boolean nullableSelf;
private final boolean nullableOther;
JoinType(String sql, boolean nullableSelf, boolean nullableOther) {
this.sql = requireNonNull(sql);
this.nullableSelf = nullableSelf;
this.nullableOther = nullableOther;
}
/**
* Returns the SQL representation of the JoinType.
*
* @return the SQL representation of the JoinType
*/
public String sql() {
return sql;
}
/**
* Returns if this JoinType can produce results that are {@code null} for
* entities belonging to the same Stage where this JoinType is present.
*
* @return if this JoinType can produce results that are {@code null} for
* entities belonging to the same Stage where this JoinType is present
*/
public boolean isNullableSelf() {
return nullableSelf;
}
/**
* Returns if this JoinType can produce results that are {@code null} for
* entities belonging to another Stage.
*
* @return if this JoinType can produce results that are {@code null} for
* entities belonging to another Stage
*/
public boolean isNullableOther() {
return nullableOther;
}
/**
* Returns if this JoinType always produce results that are NEVER
* {@code null} for entities belonging to another Stage.
*
* @return if this JoinType always produce results that are NEVER
* {@code null} for entities belonging to another Stage.
*/
public boolean isNeverNullable() {
return !nullableSelf && !nullableOther;
}
}