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This library is a fork of Apache DdlUtils. DdlUtils is a small, easy-to-use component for working with Database Definition (DDL) files.

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package org.jumpmind.db.alter;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * 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,
 * 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.
 */

import org.jumpmind.db.model.Column;
import org.jumpmind.db.model.Database;
import org.jumpmind.db.model.Table;

/**
 * Represents the change of the required constraint of a column. Since it is a
 * boolean value, this means the required constraint will simply be toggled.
 */
public class ColumnRequiredChange extends TableChangeImplBase implements ColumnChange {
    
    /** The column. */
    private Column column;

    /**
     * Creates a new change object.
     * 
     * @param table
     *            The table of the column
     * @param column
     *            The column
     */
    public ColumnRequiredChange(Table table, Column column) {
        super(table);
        this.column = column;
    }

    /**
     * Returns the column.
     * 
     * @return The column
     */
    public Column getChangedColumn() {
        return column;
    }

    public void apply(Database database, boolean caseSensitive) {
        Table table = database.findTable(getChangedTable().getName(), caseSensitive);
        Column column = table.findColumn(this.column.getName(), caseSensitive);
        column.setRequired(!column.isRequired());
    }
}