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Merged gcj-eclipse branch to trunk.

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From-SVN: r120621
This commit is contained in:
Tom Tromey 2007-01-09 19:58:05 +00:00
parent c648dedbde
commit 97b8365caf
17478 changed files with 606493 additions and 100744 deletions
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174
libjava/classpath/gnu/java/security/Engine.java
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@ -79,158 +79,170 @@ public final class Engine
/** This class cannot be instantiated. */
private Engine() { }
// Class method.
// ------------------------------------------------------------------------
/**
* Get the implementation for <i>algorithm</i> for service
* <i>service</i> from <i>provider</i>. The service is e.g.
* "Signature", and the algorithm "DSA".
*
* @param service The service name.
* Return the implementation for <i>algorithm</i> for service <i>service</i>
* from <i>provider</i>. The service is e.g. "Signature", and the algorithm
* "DSA".
*
* @param service The service name.
* @param algorithm The name of the algorithm to get.
* @param provider The provider to get the implementation from.
* @return The engine class for the specified algorithm; the object
* returned is typically a subclass of the SPI class for that
* service, but callers should check that this is so.
* @throws NoSuchAlgorithmException If the implementation cannot be
* found or cannot be instantiated.
* @throws InvocationTargetException If the SPI class's constructor
* throws an exception.
* @throws IllegalArgumentException If any of the three arguments are null.
* @param provider The provider to get the implementation from.
* @return The engine class for the specified algorithm; the object returned
* is typically a subclass of the SPI class for that service, but
* callers should check that this is so.
* @throws NoSuchAlgorithmException If the implementation cannot be found or
* cannot be instantiated.
* @throws InvocationTargetException If the SPI class's constructor throws an
* exception.
* @throws IllegalArgumentException If any of the three arguments is null.
*/
public static Object getInstance(String service, String algorithm,
Provider provider)
throws InvocationTargetException, NoSuchAlgorithmException
throws InvocationTargetException, NoSuchAlgorithmException
{
return getInstance(service, algorithm, provider, NO_ARGS);
}
/**
* Get the implementation for <i>algorithm</i> for service
* <i>service</i> from <i>provider</i>, passing <i>initArgs</i> to the
* SPI class's constructor (which cannot be null; pass a zero-length
* array if the SPI takes no arguments). The service is e.g.
* "Signature", and the algorithm "DSA".
*
* @param service The service name.
* Return the implementation for <i>algorithm</i> for service <i>service</i>
* from <i>provider</i>, passing <i>initArgs</i> to the SPI class's
* constructor (which cannot be null; pass a zero-length array if the SPI
* takes no arguments). The service is e.g. "Signature", and the algorithm
* "DSA".
*
* @param service The service name.
* @param algorithm The name of the algorithm to get.
* @param provider The provider to get the implementation from.
* @param initArgs The arguments to pass to the SPI class's
* constructor (cannot be null).
* @return The engine class for the specified algorithm; the object
* returned is typically a subclass of the SPI class for that
* service, but callers should check that this is so.
* @throws NoSuchAlgorithmException If the implementation cannot be
* found or cannot be instantiated.
* @throws InvocationTargetException If the SPI class's constructor
* throws an exception.
* @throws IllegalArgumentException If any of the four arguments are null.
* @param provider The provider to get the implementation from.
* @param initArgs The arguments to pass to the SPI class's constructor
* (cannot be null).
* @return The engine class for the specified algorithm; the object returned
* is typically a subclass of the SPI class for that service, but
* callers should check that this is so.
* @throws NoSuchAlgorithmException If the implementation cannot be found or
* cannot be instantiated.
* @throws InvocationTargetException If the SPI class's constructor throws an
* exception.
* @throws IllegalArgumentException If any of the four arguments is
* <code>null</code> or if either <code>service</code>, or
* <code>algorithm</code> is an empty string.
*/
public static Object getInstance(String service, String algorithm,
Provider provider, Object[] initArgs)
throws InvocationTargetException, NoSuchAlgorithmException
throws InvocationTargetException, NoSuchAlgorithmException
{
if (service != null)
service = service.trim();
if (service == null)
throw new IllegalArgumentException("service MUST NOT be null");
service = service.trim();
if (service.length() == 0)
throw new IllegalArgumentException("service MUST NOT be empty");
if (algorithm == null)
throw new IllegalArgumentException("algorithm MUST NOT be null");
algorithm = algorithm.trim();
if (algorithm.length() == 0)
throw new IllegalArgumentException("algorithm MUST NOT be empty");
if (provider == null)
throw new IllegalArgumentException("provider MUST NOT be null");
if (initArgs == null)
throw new IllegalArgumentException("Constructor's parameters MUST NOT be null");
if (algorithm != null)
algorithm = algorithm.trim();
if (service == null || service.length() == 0
|| algorithm == null || algorithm.length() == 0
|| provider == null || initArgs == null)
throw new IllegalArgumentException();
Enumeration enumer = provider.propertyNames();
String key;
String alias;
int count = 0;
boolean algorithmFound = false;
StringBuilder sb = new StringBuilder();
while (enumer.hasMoreElements())
{
key = (String) enumer.nextElement();
if (key.equalsIgnoreCase(service + "." + algorithm))
{
// remove the service portion from the key
algorithm = key.substring(service.length() + 1);
algorithmFound = true;
break;
}
else if (key.equalsIgnoreCase(ALG_ALIAS + service + "." + algorithm))
{
alias = (String) provider.getProperty(key);
if (! algorithm.equalsIgnoreCase(alias)) // does not refer to itself
{
algorithm = alias;
if (count++ > MAX_ALIASES)
throw new NoSuchAlgorithmException("too many aliases");
{
sb.append("Algorithm [").append(algorithm)
.append("] of type [").append(service)
.append("] from provider [").append(provider)
.append("] has too many aliases");
throw new NoSuchAlgorithmException(sb.toString());
}
// need to reset enumeration to now look for the alias
enumer = provider.propertyNames();
}
}
}
if (! algorithmFound)
{
throw new NoSuchAlgorithmException(algorithm);
sb.append("Algorithm [").append(algorithm).append("] of type [")
.append(service).append("] from provider [")
.append(provider).append("] is not found");
throw new NoSuchAlgorithmException(sb.toString());
}
// Find and instantiate the implementation.
// Find and instantiate the implementation
Class clazz = null;
ClassLoader loader = provider.getClass().getClassLoader();
Constructor constructor = null;
String error = algorithm;
String className = provider.getProperty(service + "." + algorithm);
sb.append("Class [").append(className).append("] for algorithm [")
.append(algorithm).append("] of type [").append(service)
.append("] from provider [").append(provider).append("] ");
Throwable cause = null;
try
{
if (loader != null)
clazz = loader.loadClass(provider.getProperty(service+"."+algorithm));
clazz = loader.loadClass(className);
else
clazz = Class.forName(provider.getProperty(service+"."+algorithm));
clazz = Class.forName(className);
constructor = getCompatibleConstructor(clazz, initArgs);
return constructor.newInstance(initArgs);
}
catch (ClassNotFoundException cnfe)
catch (ClassNotFoundException x)
{
error = "class not found: " + algorithm;
sb.append("cannot not be found");
cause = x;
}
catch (IllegalAccessException iae)
catch (IllegalAccessException x)
{
error = "illegal access: " + iae.getMessage();
sb.append("cannot be accessed");
cause = x;
}
catch (InstantiationException ie)
catch (InstantiationException x)
{
error = "instantiation exception: " + ie.getMessage();
sb.append("cannot be instantiated");
cause = x;
}
catch (ExceptionInInitializerError eiie)
catch (ExceptionInInitializerError x)
{
error = "exception in initializer: " + eiie.getMessage();
sb.append("cannot be initialized");
cause = x;
}
catch (SecurityException se)
catch (SecurityException x)
{
error = "security exception: " + se.getMessage();
sb.append("caused a security violation");
cause = x;
}
catch (NoSuchMethodException nsme)
catch (NoSuchMethodException x)
{
error = "no appropriate constructor found";
sb.append("does not have/expose an appropriate constructor");
cause = x;
}
throw new NoSuchAlgorithmException(error);
NoSuchAlgorithmException x = new NoSuchAlgorithmException(sb.toString());
x.initCause(cause);
throw x;
}
// Own methods.
// ------------------------------------------------------------------------
/**
* Find a constructor in the given class that can take the specified
* argument list, allowing any of which to be null.