feat: disable foreign keys during dataset setup/teardown

- Add postgres foreign key manager
- Add mysql foreign key manager
- Add mariadb foreign key manager
- Add mssql foreign key manager
- Add oracle foreign key manager
- Add hsqldb foreign key manager

src/main/java/com/github/mjeanroy/dbunit/commons/lang/PreConditions.java

@@ -25,6 +25,7 @@
 package com.github.mjeanroy.dbunit.commons.lang;
 
 import static com.github.mjeanroy.dbunit.commons.lang.Strings.isBlank;
+import static com.github.mjeanroy.dbunit.commons.lang.Strings.isEmpty;
 
 /**
  * Static PreConditions Utilities.
@@ -52,6 +53,26 @@ public static <T> T notNull(T value, String message, Object... params) {
 		return value;
 	}
 
+	/**
+	 * Ensure that given {@code value} is not {@code null}, empty.
+	 *
+	 * @param value Value to check.
+	 * @param message Error message.
+	 * @param params Optional error message parameters.
+	 * @return Value if it is not {@code null}, empty.
+	 * @throws NullPointerException If {@code value} is null.
+	 * @throws IllegalArgumentException If {@code value} is empty.
+	 */
+	public static String notEmpty(String value, String message, Object... params) {
+		notNull(value, message, params);
+
+		if (isEmpty(value)) {
+			throw new IllegalArgumentException(format(message, params));
+		}
+
+		return value;
+	}
+
 	/**
 	 * Ensure that given {@code value} is not {@code null}, empty or blank.
 	 *

src/main/java/com/github/mjeanroy/dbunit/commons/lang/ToStringBuilder.java

@@ -80,6 +80,17 @@ public static ToStringBuilder create(Class<?> klass) {
 		return new ToStringBuilder(klass);
 	}
 
+	/**
+	 * Create the builder with given class of instance (the simple name will be used to start
+	 * the {@code toString} value).
+	 *
+	 * @param instance The instance.
+	 * @return The builder.
+	 */
+	public static ToStringBuilder create(Object instance) {
+		return new ToStringBuilder(instance.getClass());
+	}
+
 	/**
 	 * The internal string builder.
 	 */

src/main/java/com/github/mjeanroy/dbunit/core/jdbc/AbstractJdbcDropCreateForeignKeyManager.java

@@ -0,0 +1,128 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015-2021 Mickael Jeanroy
+ *
+ * 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 com.github.mjeanroy.dbunit.core.jdbc;
+
+import com.github.mjeanroy.dbunit.exception.JdbcException;
+import com.github.mjeanroy.dbunit.loggers.Logger;
+import com.github.mjeanroy.dbunit.loggers.Loggers;
+
+import java.sql.Connection;
+import java.util.ArrayList;
+import java.util.List;
+
+import static com.github.mjeanroy.dbunit.core.jdbc.JdbcUtils.executeUpdates;
+
+abstract class AbstractJdbcDropCreateForeignKeyManager<T> implements JdbcForeignKeyManager {
+
+	private static final Logger log = Loggers.getLogger(AbstractJdbcDropCreateForeignKeyManager.class);
+
+	private List<T> foreignKeys;
+
+	AbstractJdbcDropCreateForeignKeyManager() {
+		// Initial state.
+		this.foreignKeys = null;
+	}
+
+	@Override
+	public final synchronized void disable(Connection connection) {
+		checkInitialState();
+
+		// Introspect foreign keys, so we can drop them
+		// and re-create them in the exact same configuration later.
+		foreignKeys = introspectForeignKeys(connection);
+
+		// We can now drop foreign these foreign keys.
+		dropForeignKeys(connection);
+	}
+
+	@Override
+	public final synchronized void enable(Connection connection) {
+		// Re-create foreign keys with the same initial configuration.
+		reCreateForeignKeys(connection);
+
+		// Go back to initial state.
+		foreignKeys = null;
+	}
+
+	private void checkInitialState() {
+		if (foreignKeys != null) {
+			throw new IllegalStateException(
+				"Cannot disable constraints, foreign keys have been dropped, please re-enable them before"
+			);
+		}
+	}
+
+	private void dropForeignKeys(Connection connection) {
+		if (foreignKeys == null) {
+			throw new IllegalStateException(
+				"Cannot disable constraints, foreign keys have not been introspected"
+			);
+		}
+
+		List<String> queries = new ArrayList<>(foreignKeys.size());
+		for (T foreignKey : foreignKeys) {
+			queries.add(
+				generateDropForeignKeyQuery(foreignKey)
+			);
+		}
+
+		try {
+			executeUpdates(connection, queries);
+		}
+		catch (Exception ex) {
+			log.error(ex.getMessage(), ex);
+			throw new JdbcException("Cannot disable foreign key constraints", ex);
+		}
+	}
+
+	private void reCreateForeignKeys(Connection connection) {
+		if (foreignKeys == null) {
+			throw new IllegalStateException(
+				"Cannot enable constraints, foreign keys have not been introspected, try disabling constraints first"
+			);
+		}
+
+		List<String> queries = new ArrayList<>(foreignKeys.size());
+		for (T foreignKey : foreignKeys) {
+			queries.add(
+				generateAddForeignKeyQuery(foreignKey)
+			);
+		}
+
+		try {
+			executeUpdates(connection, queries);
+		}
+		catch (Exception ex) {
+			log.error(ex.getMessage(), ex);
+			throw new JdbcException("Cannot enable foreign key constraints, please check your dataset", ex);
+		}
+	}
+
+	abstract List<T> introspectForeignKeys(Connection connection);
+
+	abstract String generateDropForeignKeyQuery(T foreignKey);
+
+	abstract String generateAddForeignKeyQuery(T foreignKey);
+}