DataSource.java

/*******************************************************************************
 * Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
 * which accompanies this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.scplugin.model.adapter;

import org.eclipse.persistence.tools.workbench.platformsmodel.DatabasePlatform;
import org.eclipse.persistence.tools.workbench.platformsmodel.DatabasePlatformRepository;
import org.eclipse.persistence.tools.workbench.scplugin.SCPlugin;
import org.eclipse.persistence.tools.workbench.scplugin.model.EisPlatformManager;


/**
 *
 * @author Tran Le
 */
public class DataSource {

    private static final int DATABASE_PLATFORM_ID = 1;
    private static final int EIS_PLATFORM_ID = 2;
    private static final int XML_PLATFORM_ID = 3;
    private static final int DEFAULT_PLATFORM_ID = 4;

    private int platformId;
    private String platformName;
    private String platformClassName;

    private DataSource() {

        this.platformClassName = null;
    }
    /**
     * Constructor for a Database DataSource.
     */
    public DataSource( DatabasePlatform platform) {

        initializeDbDs( platform);
    }
    /**
     * Constructor for a EIS DataSource.
     */
    public DataSource( String shortClassName) {

        initializeEisDs( shortClassName);
    }
    /**
     * Factory method to build a XML DataSource.
     */
    static public DataSource buildXmlDataSource() {
        DataSource ds = new DataSource();

        ds.initializeXmlDs();
        return ds;
    }
    /**
     * Helper method to get the runtime class name.
     */
    static public String getClassNameForDatabasePlatform( DatabasePlatform platform) {

        return platform.getRuntimePlatformClassName();
    }
    /**
     * Helper method to get the runtime class name.
     */
    static public String getClassNameForEisPlatform( String shortClassName) {

        return EisPlatformManager.instance().getRuntimePlatformClassNameForClass( shortClassName);
    }
    /**
     * Factory method to build a Default DataSource.
     * Used when a Login has not been defined in sessions.xml
     */
    static public DataSource buildDefault() {
        DataSource ds = new DataSource();

        ds.initializeDefaultDs();
        return ds;
    }
    /**
     * Factory method to build a DataSource based on user's preferences.
     */
    static public DataSource buildPreferedDataSourceFor( SCAdapter adapter) {

        String platformName = adapter.preferences().get( SCPlugin.DATABASE_PLATFORM_PREFERENCE, SCPlugin.DATABASE_PLATFORM_PREFERENCE_DEFAULT);
        DatabasePlatform platform = DatabasePlatformRepository.getDefault().platformNamed( platformName);

        return new DataSource( platform);
    }

    private void initializeDbDs( DatabasePlatform platform) {

        this.platformId = DATABASE_PLATFORM_ID;
        this.platformName = platform.getName();
        this.platformClassName = platform.getRuntimePlatformClassName();
    }

    private void initializeEisDs( String shortClassName) {

        this.platformId = EIS_PLATFORM_ID;
        this.platformName = shortClassName;
        this.platformClassName = EisPlatformManager.instance().getRuntimePlatformClassNameFor(shortClassName);
    }

    private void initializeXmlDs() {

        this.platformId = XML_PLATFORM_ID;
        this.platformName = "xml-platform";
        this.platformClassName = XMLLoginAdapter.DEFAULT_PLATFORM_CLASS_NAME;
    }

    private void initializeDefaultDs() {

        this.platformId = DEFAULT_PLATFORM_ID;
        this.platformName = "default-platform";
    }

    public boolean isDatabase() {
        return this.platformId == DATABASE_PLATFORM_ID;
    }

    public boolean isEis() {
        return this.platformId == EIS_PLATFORM_ID;
    }

    public boolean isXml() {
        return this.platformId == XML_PLATFORM_ID;
    }

    public boolean isDefault() {
        return this.platformId == DEFAULT_PLATFORM_ID;
    }

    public String getName() {
        return this.platformName;
    }

    public String getPlatformClassName() {
        return this.platformClassName;
    }

    LoginAdapter buildLoginAdapter( DatabaseSessionAdapter parent) {

        if( this.isXml()) {
            return new XMLLoginAdapter( parent);
        }
        else if( this.isDatabase()) {
            return new DatabaseLoginAdapter( parent);
        }
        else if( this.isEis()) {
            return new EISLoginAdapter( parent);
        }
        else if( this.isDefault()) {
            return parent.buildDefaultLogin();
        }
        throw new IllegalArgumentException( platformName);
    }

    public String toString() {

        return this.getName();
    }
}