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This test suite checks GeoPackage 1.2 files for standards conformance.
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/* The MIT License (MIT)
 *
 * Copyright (c) 2015 Reinventing Geospatial, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.opengis.cite.gpkg12;

/**
 * @author Luke Lambert
 *
 */
public class ForeignKeyDefinition {

	/**
	 * @param referenceTableName the table name with the foreign key constraint
	 * @param fromColumnName the name of the column that the link between two tables is
	 * from
	 * @param toColumnName the name of the column that the link between two tables is to
	 */
	public ForeignKeyDefinition(final String referenceTableName, final String fromColumnName,
			final String toColumnName) {
		if (referenceTableName == null || referenceTableName.isEmpty()) {
			throw new IllegalArgumentException("Reference table name may not be null or empty");
		}

		if (fromColumnName == null || fromColumnName.isEmpty()) {
			throw new IllegalArgumentException("From column name table name may not be null or empty");
		}

		if (toColumnName == null || toColumnName.isEmpty()) {
			throw new IllegalArgumentException("To column name may not be null or empty");
		}

		this.referenceTableName = referenceTableName;
		this.fromColumnName = fromColumnName;
		this.toColumnName = toColumnName;
	}

	@Override
	public boolean equals(final Object object) {
		if (!(object instanceof ForeignKeyDefinition)) {
			return false;
		}

		if (object == this) {
			return true;
		}

		final ForeignKeyDefinition other = (ForeignKeyDefinition) object;

		return this.referenceTableName.equals(other.referenceTableName)
				&& this.fromColumnName.equals(other.fromColumnName) && this.toColumnName.equals(other.toColumnName);

	}

	@Override
	public int hashCode() {
		return this.referenceTableName.hashCode() ^ this.fromColumnName.hashCode() ^ this.toColumnName.hashCode();
	}

	/**
	 * @return the referenceTableName
	 */
	public String getReferenceTableName() {
		return this.referenceTableName;
	}

	/**
	 * @return the fromColumnName
	 */
	public String getFromColumnName() {
		return this.fromColumnName;
	}

	/**
	 * @return the toColumnName
	 */
	public String getToColumnName() {
		return this.toColumnName;
	}

	private final String referenceTableName;

	private final String fromColumnName;

	private final String toColumnName;

}