jpa/plugins/org.eclipse.jpt.jpa.db/src/org/eclipse/jpt/jpa/db/DatabaseObject.java

/*******************************************************************************
 * Copyright (c) 2008, 2009 Oracle. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0, which accompanies this distribution
 * and is available at http://www.eclipse.org/legal/epl-v10.html.
 * 
 * Contributors:
 *     Oracle - initial API and implementation
 ******************************************************************************/
package org.eclipse.jpt.jpa.db;

import java.util.Comparator;

import org.eclipse.jpt.common.utility.internal.Transformer;

import com.ibm.icu.text.Collator;

/**
 * Common behavior to all database objects
 * <p>
 * Provisional API: This interface is part of an interim API that is still
 * under development and expected to change significantly before reaching
 * stability. It is available at this early stage to solicit feedback from
 * pioneering adopters on the understanding that any code that uses this API
 * will almost certainly be broken (repeatedly) as the API evolves.
 */
public interface DatabaseObject {

	/**
	 * Return the database object's name.
	 */
	String getName();

	/**
	 * Return the database object's "identifier", which is the object's name
	 * modified so it can be used in an SQL statement (e.g. if the name contains
	 * special characters or is mixed case, it will be delimited, typically by
	 * double-quotes).
	 * Return null if the database object's identifier matches the specified
	 * "default name".
	 * <p>
	 * This is used by the old entity generation code to determine whether
	 * a generated annotation must explicitly identify a database object
	 * (e.g. a table) or the specified default adequately identifies the database object
	 * (taking into consideration case-sensitivity and special characters).
	 */
	String getIdentifier(String defaultName);

	/**
	 * Return the database object's "identifier", which is the object's name
	 * modified so it can be used in an SQL statement (e.g. if the name contains
	 * special characters or is mixed case, it will be delimited, typically by
	 * double-quotes).
	 */
	String getIdentifier();

	/**
	 * Return the database object's database.
	 */
	Database getDatabase();

	/**
	 * Return the database object's connection profile.
	 */
	ConnectionProfile getConnectionProfile();


	Comparator<DatabaseObject> DEFAULT_COMPARATOR =
			new Comparator<DatabaseObject>() {
				public int compare(DatabaseObject dbObject1, DatabaseObject dbObject2) {
					return Collator.getInstance().compare(dbObject1.getName(), dbObject2.getName());
				}
				@Override
				public String toString() {
					return "DatabaseObject.DEFAULT_COMPARATOR"; //$NON-NLS-1$
				}
			};

	Transformer<DatabaseObject, String> NAME_TRANSFORMER =
			new Transformer<DatabaseObject, String>() {
				public String transform(DatabaseObject dbObject) {
					return dbObject.getName();
				}
				@Override
				public String toString() {
					return "DatabaseObject.NAME_TRANSFORMER"; //$NON-NLS-1$
				}
			};

	Transformer<DatabaseObject, String> IDENTIFIER_TRANSFORMER =
			new Transformer<DatabaseObject, String>() {
				public String transform(DatabaseObject dbObject) {
					return dbObject.getIdentifier();
				}
				@Override
				public String toString() {
					return "DatabaseObject.IDENTIFIER_TRANSFORMER"; //$NON-NLS-1$
				}
			};

}