/******************************************************************************* | |
* Copyright (c) 1998, 2013 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.internal.helper; | |
import java.security.AccessController; | |
import java.security.PrivilegedActionException; | |
import java.sql.SQLException; | |
import org.eclipse.persistence.Version; | |
import org.eclipse.persistence.internal.security.PrivilegedAccessHelper; | |
import org.eclipse.persistence.internal.security.PrivilegedNewInstanceFromClass; | |
import org.eclipse.persistence.internal.security.PrivilegedClassForName; | |
/** | |
* INTERNAL: | |
* JavaPlatform abstracts the version of the JDK we are using. It allows any operation | |
* which is dependent on JDK version to be called from a single place and then delegates | |
* the call to its JDKPlatform | |
* @see JDPlatform | |
* @author Tom Ware | |
*/ | |
public class JavaPlatform { | |
protected static JDKPlatform platform = null; | |
/** | |
* INTERNAL: | |
* Get the version of JDK being used from the Version class. | |
* @return JDKPlatform a platform appropriate for the version of JDK being used. | |
*/ | |
protected static JDKPlatform getPlatform() { | |
if (platform == null) { | |
if (Version.isJDK16()) { | |
try { | |
Class platformClass = null; | |
// use class.forName() to avoid loading the JDK 1.6 class unless it is needed. | |
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){ | |
try { | |
platformClass = (Class)AccessController.doPrivileged(new PrivilegedClassForName("org.eclipse.persistence.internal.helper.JDK16Platform")); | |
} catch (PrivilegedActionException exception) { | |
} | |
} else { | |
platformClass = org.eclipse.persistence.internal.security.PrivilegedAccessHelper.getClassForName("org.eclipse.persistence.internal.helper.JDK16Platform"); | |
} | |
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){ | |
try { | |
platform = (JDKPlatform)AccessController.doPrivileged(new PrivilegedNewInstanceFromClass(platformClass)); | |
} catch (PrivilegedActionException exception) { | |
} | |
} else { | |
platform = (JDKPlatform)PrivilegedAccessHelper.newInstanceFromClass(platformClass); | |
} | |
} catch (Exception exception) { | |
} | |
} | |
if (platform == null) { | |
platform = new JDK15Platform(); | |
} | |
} | |
return platform; | |
} | |
/** | |
* INTERNAL: | |
* Conform an expression which uses the operator "like" for an in-memory query | |
* @return Boolean (TRUE, FALSE, null == unknown) | |
*/ | |
public static Boolean conformLike(Object left, Object right) { | |
return getPlatform().conformLike(left, right); | |
} | |
/** | |
* INTERNAL: | |
* Conform an expression which uses the operator "regexp" for an in-memory query | |
* @return Boolean (TRUE, FALSE, null == unknown) | |
*/ | |
public static Boolean conformRegexp(Object left, Object right) { | |
return getPlatform().conformRegexp(left, right); | |
} | |
/** | |
* INTERNAL: | |
* Indicates whether the passed object implements java.sql.SQLXML introduced in jdk 1.6 | |
*/ | |
public static boolean isSQLXML(Object object) { | |
return getPlatform().isSQLXML(object); | |
} | |
/** | |
* INTERNAL: | |
* Casts the passed object to SQLXML and calls getString and free methods | |
*/ | |
public static String getStringAndFreeSQLXML(Object sqlXml) throws SQLException { | |
return getPlatform().getStringAndFreeSQLXML(sqlXml); | |
} | |
} |