classworlds - 1.1-alpha-1

Clover coverage report - classworlds - 1.1-alpha-1

Coverage timestamp: Sun Sep 19 2004 14:08:44 EDT

FRAMES NO FRAMES

file stats:	LOC:	293		Methods:	9
	NCLOC:	131		Classes:	1

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Source file

Conditionals

Statements

Methods

TOTAL

EmbeddedLauncher.java

 package org.codehaus.classworlds;
 
 /*
  $Id: EmbeddedLauncher.java,v 1.1.1.1 2004/07/01 13:59:19 jvanzyl Exp $
 
  Copyright 2002 (C) The Werken Company. All Rights Reserved.
  
  Redistribution and use of this software and associated documentation
  ("Software"), with or without modification, are permitted provided
  that the following conditions are met:
 
  1. Redistributions of source code must retain copyright
     statements and notices.  Redistributions must also contain a
     copy of this document.
  
  2. Redistributions in binary form must reproduce the
     above copyright notice, this list of conditions and the
     following disclaimer in the documentation and/or other
     materials provided with the distribution.
  
  3. The name "classworlds" must not be used to endorse or promote
     products derived from this Software without prior written
     permission of The Werken Company.  For written permission,
     please contact bob@werken.com.
  
  4. Products derived from this Software may not be called "classworlds"
     nor may "classworlds" appear in their names without prior written
     permission of The Werken Company. "classworlds" is a registered
     trademark of The Werken Company.
  
  5. Due credit should be given to The Werken Company.
     (http://classworlds.werken.com/).
  
  THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS
  ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
  NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
  THE WERKEN COMPANY OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  OF THE POSSIBILITY OF SUCH DAMAGE.
  
  */
 
 import java.io.FileInputStream;
 import java.io.InputStream;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
 
 /**
  * Command-line invokable application launcher.
  * <p/>
  * <p/>
  * This launcher class assists in the creation of classloaders and <code>ClassRealm</code>s
  * from a configuration file and the launching of the application's <code>main</code>
  * method from the correct class loaded through the correct classloader.
  * </p>
  * <p/>
  * <p/>
  * The path to the configuration file is specified using the <code>classworlds.conf</code>
  * system property, typically specified using the <code>-D</code> switch to
  * <code>java</code>.
  * </p>
  *
  * @author <a href="mailto:bob@eng.werken.com">bob mcwhirter</a>
  * @version $Id: EmbeddedLauncher.java,v 1.1.1.1 2004/07/01 13:59:19 jvanzyl Exp $
  */
 public class EmbeddedLauncher
     extends Launcher
 {
     private static String LAUNCH_METHOD = "execute";
 
     public EmbeddedLauncher()
     {
         super();
     }
 
     // ------------------------------------------------------------
     //     Instance methods
     // ------------------------------------------------------------
 
     /**
      * Set the application's main entrypoint.
      *
      * @param mainClassName The main class name.
      * @param mainRealmName The realm to load the class from.
      */
     public void setAppMain( String mainClassName,
                             String mainRealmName )
     {
         this.mainClassName = mainClassName;
         this.mainRealmName = mainRealmName;
     }
 
     /**
      * Retrieve the main entry realm name.
      *
      * @return The main entry realm name.
      */
     public String getMainRealmName()
     {
         return this.mainRealmName;
     }
 
     /**
      * Retrieve the main entry class name.
      *
      * @return The main entry class name.
      */
     public String getMainClassName()
     {
         return this.mainClassName;
     }
 
     /**
      * Retrieve the main entry class.
      *
      * @return The main entry class.
      * @throws ClassNotFoundException If the class cannot be found.
      * @throws NoSuchRealmException   If the specified main entry realm does not exist.
      */
     public Class getMainClass()
         throws ClassNotFoundException, NoSuchRealmException
     {
         return getMainRealm().loadClass( getMainClassName() );
     }
 
     /**
      * Retrieve the main entry realm.
      *
      * @return The main entry realm.
      * @throws NoSuchRealmException If the specified main entry realm does not exist.
      */
     public ClassRealm getMainRealm()
         throws NoSuchRealmException
     {
         return getWorld().getRealm( getMainRealmName() );
     }
 
     /**
      * Retrieve the enhanced main entry method.
      *
      * @return The enhanced main entry method.
      * @throws ClassNotFoundException If the main entry class cannot be found.
      * @throws NoSuchMethodException  If the main entry method cannot be found.
      * @throws NoSuchRealmException   If the main entry realm cannot be found.
      */
     protected Method getEnhancedMainMethod()
         throws ClassNotFoundException, NoSuchMethodException, NoSuchRealmException
     {
         Method[] methods = getMainClass().getMethods();
 
         for ( int i = 0; i < methods.length; ++i )
         {
             final Method method = methods[i];
 
             if ( !LAUNCH_METHOD.equals( method.getName() ) )
             {
                 continue;
             }
 
             int modifiers = method.getModifiers();
 
             if ( !( Modifier.isPublic( modifiers ) ) )
             {
                 continue;
             }
 
             if ( method.getReturnType() != Void.TYPE )
             {
                 continue;
             }
 
             Class[] paramTypes = method.getParameterTypes();
 
             if ( paramTypes.length != 2 )
             {
                 continue;
             }
 
             if ( paramTypes[0] != String[].class )
             {
                 continue;
             }
 
             if ( paramTypes[1] != ClassWorld.class )
             {
                 continue;
             }
 
             return method;
         }
 
         throw new NoSuchMethodException( "public void execute(ClassWorld world)" );
     }
 
     /**
      * Attempt to launch the application through the enhanced main method.
      * <p/>
      * <p/>
      * This will seek a method with the exact signature of:
      * </p>
      * <p/>
      * <pre>
      *  public static void main(String[] args, ClassWorld world)
      *  </pre>
      *
      * @throws ClassNotFoundException If the main entry class cannot be found.
      * @throws IllegalAccessException If the method cannot be accessed.
      * @throws java.lang.reflect.InvocationTargetException
      *                                If the target of the invokation is
      *                                invalid.
      * @throws NoSuchMethodException  If the main entry method cannot be found.
      * @throws NoSuchRealmException   If the main entry realm cannot be found.
      */
     protected void launchX()
         throws ClassNotFoundException, IllegalAccessException,
         InvocationTargetException, NoSuchMethodException, NoSuchRealmException
     {
         ClassRealm mainRealm = getMainRealm();
         Class mainClass = getMainClass();
         Method mainMethod = getEnhancedMainMethod();
 
         Thread.currentThread().setContextClassLoader( mainRealm.getClassLoader() );
 
         mainMethod.invoke( mainClass, new Object[]{getWorld()} );
     }
 
     // ------------------------------------------------------------
     //     Class methods
     // ------------------------------------------------------------
 
     public void launch()
         throws Exception
     {
         String classworldsConf = System.getProperty( CLASSWORLDS_CONF );
 
         InputStream is = null;
 
         if ( classworldsConf != null )
         {
             is = new FileInputStream( classworldsConf );
         }
         else
         {
             ClassLoader cl = Thread.currentThread().getContextClassLoader();
 
             if ( "true".equals( System.getProperty( "classworlds.bootstrapped" ) ) )
             {
                 is = cl.getResourceAsStream( UBERJAR_CONF_DIR + CLASSWORLDS_CONF );
             }
             else
             {
                 is = cl.getResourceAsStream( CLASSWORLDS_CONF );
             }
         }
 
         if ( is == null )
         {
             throw new Exception( "classworlds configuration not specified nor found "
                                  + "in the classpath" );
         }
 
         configure( is );
 
         try
         {
             launchX();
         }
         catch ( InvocationTargetException e )
         {
             // Decode ITE (if we can)
             Throwable t = e.getTargetException();
             if ( t instanceof Exception )
             {
                 throw (Exception) t;
             }
             if ( t instanceof Error )
             {
                 throw (Error) t;
             }
 
             // Else just toss the ITE
             throw e;
         }
     }
 }
 

1		package org.codehaus.classworlds;
2
3		/*
4		$Id: EmbeddedLauncher.java,v 1.1.1.1 2004/07/01 13:59:19 jvanzyl Exp $
5
6		Copyright 2002 (C) The Werken Company. All Rights Reserved.
7
8		Redistribution and use of this software and associated documentation
9		("Software"), with or without modification, are permitted provided
10		that the following conditions are met:
11
12		1. Redistributions of source code must retain copyright
13		statements and notices. Redistributions must also contain a
14		copy of this document.
15
16		2. Redistributions in binary form must reproduce the
17		above copyright notice, this list of conditions and the
18		following disclaimer in the documentation and/or other
19		materials provided with the distribution.
20
21		3. The name "classworlds" must not be used to endorse or promote
22		products derived from this Software without prior written
23		permission of The Werken Company. For written permission,
24		please contact bob@werken.com.
25
26		4. Products derived from this Software may not be called "classworlds"
27		nor may "classworlds" appear in their names without prior written
28		permission of The Werken Company. "classworlds" is a registered
29		trademark of The Werken Company.
30
31		5. Due credit should be given to The Werken Company.
32		(http://classworlds.werken.com/).
33
34		THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS
35		``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
36		NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
37		FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
38		THE WERKEN COMPANY OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
39		INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
40		(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
41		SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
42		HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
43		STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
44		ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
45		OF THE POSSIBILITY OF SUCH DAMAGE.
46
47		*/
48
49		import java.io.FileInputStream;
50		import java.io.InputStream;
51		import java.lang.reflect.InvocationTargetException;
52		import java.lang.reflect.Method;
53		import java.lang.reflect.Modifier;
54
55		/**
56		* Command-line invokable application launcher.
57		* <p/>
58		* <p/>
59		* This launcher class assists in the creation of classloaders and <code>ClassRealm</code>s
60		* from a configuration file and the launching of the application's <code>main</code>
61		* method from the correct class loaded through the correct classloader.
62		* </p>
63		* <p/>
64		* <p/>
65		* The path to the configuration file is specified using the <code>classworlds.conf</code>
66		* system property, typically specified using the <code>-D</code> switch to
67		* <code>java</code>.
68		* </p>
69		*
70		* @author <a href="mailto:bob@eng.werken.com">bob mcwhirter</a>
71		* @version $Id: EmbeddedLauncher.java,v 1.1.1.1 2004/07/01 13:59:19 jvanzyl Exp $
72		*/
73		public class EmbeddedLauncher
74		extends Launcher
75		{
76		private static String LAUNCH_METHOD = "execute";
77
78	0	public EmbeddedLauncher()
79		{
80	0	super();
81		}
82
83		// ------------------------------------------------------------
84		// Instance methods
85		// ------------------------------------------------------------
86
87		/**
88		* Set the application's main entrypoint.
89		*
90		* @param mainClassName The main class name.
91		* @param mainRealmName The realm to load the class from.
92		*/
93	0	public void setAppMain( String mainClassName,
94		String mainRealmName )
95		{
96	0	this.mainClassName = mainClassName;
97	0	this.mainRealmName = mainRealmName;
98		}
99
100		/**
101		* Retrieve the main entry realm name.
102		*
103		* @return The main entry realm name.
104		*/
105	0	public String getMainRealmName()
106		{
107	0	return this.mainRealmName;
108		}
109
110		/**
111		* Retrieve the main entry class name.
112		*
113		* @return The main entry class name.
114		*/
115	0	public String getMainClassName()
116		{
117	0	return this.mainClassName;
118		}
119
120		/**
121		* Retrieve the main entry class.
122		*
123		* @return The main entry class.
124		* @throws ClassNotFoundException If the class cannot be found.
125		* @throws NoSuchRealmException If the specified main entry realm does not exist.
126		*/
127	0	public Class getMainClass()
128		throws ClassNotFoundException, NoSuchRealmException
129		{
130	0	return getMainRealm().loadClass( getMainClassName() );
131		}
132
133		/**
134		* Retrieve the main entry realm.
135		*
136		* @return The main entry realm.
137		* @throws NoSuchRealmException If the specified main entry realm does not exist.
138		*/
139	0	public ClassRealm getMainRealm()
140		throws NoSuchRealmException
141		{
142	0	return getWorld().getRealm( getMainRealmName() );
143		}
144
145		/**
146		* Retrieve the enhanced main entry method.
147		*
148		* @return The enhanced main entry method.
149		* @throws ClassNotFoundException If the main entry class cannot be found.
150		* @throws NoSuchMethodException If the main entry method cannot be found.
151		* @throws NoSuchRealmException If the main entry realm cannot be found.
152		*/
153	0	protected Method getEnhancedMainMethod()
154		throws ClassNotFoundException, NoSuchMethodException, NoSuchRealmException
155		{
156	0	Method[] methods = getMainClass().getMethods();
157
158	0	for ( int i = 0; i < methods.length; ++i )
159		{
160	0	final Method method = methods[i];
161
162	0	if ( !LAUNCH_METHOD.equals( method.getName() ) )
163		{
164	0	continue;
165		}
166
167	0	int modifiers = method.getModifiers();
168
169	0	if ( !( Modifier.isPublic( modifiers ) ) )
170		{
171	0	continue;
172		}
173
174	0	if ( method.getReturnType() != Void.TYPE )
175		{
176	0	continue;
177		}
178
179	0	Class[] paramTypes = method.getParameterTypes();
180
181	0	if ( paramTypes.length != 2 )
182		{
183	0	continue;
184		}
185
186	0	if ( paramTypes[0] != String[].class )
187		{
188	0	continue;
189		}
190
191	0	if ( paramTypes[1] != ClassWorld.class )
192		{
193	0	continue;
194		}
195
196	0	return method;
197		}
198
199	0	throw new NoSuchMethodException( "public void execute(ClassWorld world)" );
200		}
201
202		/**
203		* Attempt to launch the application through the enhanced main method.
204		* <p/>
205		* <p/>
206		* This will seek a method with the exact signature of:
207		* </p>
208		* <p/>
209		* <pre>
210		* public static void main(String[] args, ClassWorld world)
211		* </pre>
212		*
213		* @throws ClassNotFoundException If the main entry class cannot be found.
214		* @throws IllegalAccessException If the method cannot be accessed.
215		* @throws java.lang.reflect.InvocationTargetException
216		* If the target of the invokation is
217		* invalid.
218		* @throws NoSuchMethodException If the main entry method cannot be found.
219		* @throws NoSuchRealmException If the main entry realm cannot be found.
220		*/
221	0	protected void launchX()
222		throws ClassNotFoundException, IllegalAccessException,
223		InvocationTargetException, NoSuchMethodException, NoSuchRealmException
224		{
225	0	ClassRealm mainRealm = getMainRealm();
226	0	Class mainClass = getMainClass();
227	0	Method mainMethod = getEnhancedMainMethod();
228
229	0	Thread.currentThread().setContextClassLoader( mainRealm.getClassLoader() );
230
231	0	mainMethod.invoke( mainClass, new Object[]{getWorld()} );
232		}
233
234		// ------------------------------------------------------------
235		// Class methods
236		// ------------------------------------------------------------
237
238	0	public void launch()
239		throws Exception
240		{
241	0	String classworldsConf = System.getProperty( CLASSWORLDS_CONF );
242
243	0	InputStream is = null;
244
245	0	if ( classworldsConf != null )
246		{
247	0	is = new FileInputStream( classworldsConf );
248		}
249		else
250		{
251	0	ClassLoader cl = Thread.currentThread().getContextClassLoader();
252
253	0	if ( "true".equals( System.getProperty( "classworlds.bootstrapped" ) ) )
254		{
255	0	is = cl.getResourceAsStream( UBERJAR_CONF_DIR + CLASSWORLDS_CONF );
256		}
257		else
258		{
259	0	is = cl.getResourceAsStream( CLASSWORLDS_CONF );
260		}
261		}
262
263	0	if ( is == null )
264		{
265	0	throw new Exception( "classworlds configuration not specified nor found "
266		+ "in the classpath" );
267		}
268
269	0	configure( is );
270
271	0	try
272		{
273	0	launchX();
274		}
275		catch ( InvocationTargetException e )
276		{
277		// Decode ITE (if we can)
278	0	Throwable t = e.getTargetException();
279	0	if ( t instanceof Exception )
280		{
281	0	throw (Exception) t;
282		}
283	0	if ( t instanceof Error )
284		{
285	0	throw (Error) t;
286		}
287
288		// Else just toss the ITE
289	0	throw e;
290		}
291		}
292		}
293