| /******************************************************************************* |
| * Copyright (c) 2003, 2004 IBM Corporation and others. |
| * 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jst.j2ee.internal.wizard; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| |
| /** |
| * @author Sachin |
| * |
| * To change this generated comment edit the template variable "typecomment": |
| * Window>Preferences>Java>Templates. To enable and disable the creation of type comments go to |
| * Window>Preferences>Java>Code Generation. |
| */ |
| public class PackageNameResolver extends ClassLoader { |
| |
| public PackageNameResolver() { |
| super(); |
| } |
| |
| public String getClassName(final String classFile) { |
| File file = new File(classFile); |
| byte[] classbuf = new byte[(int) file.length()]; |
| try { |
| FileInputStream instream = new FileInputStream(file); |
| instream.read(classbuf); |
| instream.close(); |
| } catch (Throwable e) { |
| return null; |
| } |
| boolean badclassname = true; |
| String classname = classFile.replace(java.io.File.separatorChar, '.'); |
| int endi; |
| if (classname.endsWith(".class")) //$NON-NLS-1$ |
| endi = classname.lastIndexOf('.'); |
| else |
| endi = classname.length(); |
| int i = classname.indexOf('.'); |
| while (i < endi && badclassname == true) { |
| badclassname = false; |
| try { |
| defineClass(classname.substring(i + 1, endi), classbuf, 0, classbuf.length); |
| } catch (java.lang.NoClassDefFoundError e) { |
| String msg = e.getMessage(); |
| if (msg == null || msg.indexOf(' ') > 0) { |
| badclassname = true; |
| } |
| } catch (Throwable e) { |
| badclassname = true; |
| } |
| if (badclassname) { |
| i = classname.indexOf('.', i + 1); |
| if (i == -1) |
| i = endi; |
| } |
| } |
| if (badclassname) |
| return null; |
| return classname.substring(i + 1, endi); |
| } |
| |
| } |