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JDBC Type 4 driver for MySQL
/*
* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, version 2.0, as published by the
* Free Software Foundation.
*
* This program is also distributed with certain software (including but not
* limited to OpenSSL) that is licensed under separate terms, as designated in a
* particular file or component or in included license documentation. The
* authors of MySQL hereby grant you an additional permission to link the
* program and your derivative works with the separately licensed software that
* they have included with MySQL.
*
* Without limiting anything contained in the foregoing, this file, which is
* part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
* version 1.0, a copy of which can be found at
* http://oss.oracle.com/licenses/universal-foss-exception.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0,
* for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.mysql.cj.xdevapi;
import java.util.Arrays;
import java.util.stream.Collectors;
public class ForeignKeyDef implements ForeignKeyDefinition {
private String name;
protected String[] columns;
protected String toTable;
protected String[] toColumns;
protected ChangeMode onDelete = ChangeMode.RESTRICT;
protected ChangeMode onUpdate = ChangeMode.RESTRICT;
@Override
public ForeignKeyDefinition setName(String fkName) {
this.name = fkName;
return this;
}
@Override
public ForeignKeyDefinition fields(String... column) {
this.columns = column;
return this;
}
@Override
public ForeignKeyDefinition refersTo(String table, String... column) {
this.toTable = table;
this.toColumns = column;
return this;
}
@Override
public ForeignKeyDefinition onDelete(ChangeMode mode) {
this.onDelete = mode;
return this;
}
@Override
public ForeignKeyDefinition onUpdate(ChangeMode mode) {
this.onUpdate = mode;
return this;
}
/**
* [CONSTRAINT [symbol]] FOREIGN KEY
* [index_name] (index_col_name, ...)
* REFERENCES tbl_name (index_col_name,...)
* [ON DELETE reference_option]
* [ON UPDATE reference_option]
*/
@Override
public String toString() {
StringBuilder sb = new StringBuilder("FOREIGN KEY");
sb.append(" ").append(this.name);
if (this.columns == null || this.columns.length == 0) {
throw new XDevAPIError("ForeignKeyDefinition is incomplete, fields are empty.");
}
sb.append(Arrays.stream(this.columns).collect(Collectors.joining(", ", " (", ")")));
if (this.toTable == null) {
throw new XDevAPIError("ForeignKeyDefinition is incomplete, to-table isn't set.");
}
sb.append(" REFERENCES ").append(this.toTable);
if (this.toColumns == null || this.toColumns.length == 0) {
throw new XDevAPIError("ForeignKeyDefinition is incomplete, to-columns are empty.");
}
sb.append(Arrays.stream(this.toColumns).collect(Collectors.joining(", ", " (", ")")));
if (this.onDelete != ChangeMode.RESTRICT) {
sb.append(" ON DELETE ").append(this.onDelete.getExpr());
}
if (this.onUpdate != ChangeMode.RESTRICT) {
sb.append(" ON UPDATE ").append(this.onUpdate.getExpr());
}
return sb.toString();
}
}