/****************************************************************************** | |
* Copyright (c) 2006, 2015 THALES GLOBAL SERVICES. | |
* 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: | |
* Thales - initial API and implementation | |
*****************************************************************************/ | |
package org.eclipse.amalgam.explorer.contextual.core.internal; | |
/** | |
* | |
*/ | |
public class TypeHelper { | |
/** | |
* Singleton. | |
*/ | |
protected static TypeHelper typeHelper = null; | |
/** | |
* Constructor. | |
*/ | |
private TypeHelper() { | |
} | |
public static TypeHelper getInstance() { | |
if (typeHelper == null) { | |
typeHelper = new TypeHelper(); | |
} | |
return typeHelper; | |
} | |
/** | |
* | |
* @param element | |
* @param type | |
* @return | |
*/ | |
public boolean isInstanceOf(Object element, String type) { | |
// null isn't an instance of of anything. | |
if (element == null) | |
return false; | |
return isSubtype(element.getClass(), type); | |
} | |
/** | |
* | |
* @param clazz | |
* @param type | |
* @return | |
*/ | |
@SuppressWarnings("rawtypes") | |
private boolean isSubtype(Class clazz, String type) { | |
if (clazz.getName().equals(type)) | |
return true; | |
Class superClass = clazz.getSuperclass(); | |
if (superClass != null && isSubtype(superClass, type)) | |
return true; | |
Class[] interfaces = clazz.getInterfaces(); | |
for (int i = 0; i < interfaces.length; i++) { | |
if (isSubtype(interfaces[i], type)) | |
return true; | |
} | |
return false; | |
} | |
} |