/*
* JBoss, Home of Professional Open Source
* Copyright 2012, Red Hat Middleware LLC, and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jboss.shrinkwrap.resolver.impl.maven.bootstrap;
import java.lang.reflect.Constructor;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.util.Properties;
SecurityActions
A set of privileged actions that are not to leak out of this package
Author: ALR, Karel Piwko Version: $Revision: $
/**
* SecurityActions
*
* A set of privileged actions that are not to leak out of this package
*
*
* @author <a href="mailto:andrew.rubinger@jboss.org">ALR</a>
* @author <a href="mailto:kpiwko@redhat.com">Karel Piwko</a>
*
* @version $Revision: $
*/
final class SecurityActions {
// -------------------------------------------------------------------------------||
// Constructor -------------------------------------------------------------------||
// -------------------------------------------------------------------------------||
No instantiation
/**
* No instantiation
*/
private SecurityActions() {
throw new UnsupportedOperationException("No instantiation");
}
// -------------------------------------------------------------------------------||
// Utility Methods ---------------------------------------------------------------||
// -------------------------------------------------------------------------------||
static String getProperty(final String key) {
try {
String value = AccessController.doPrivileged(new PrivilegedExceptionAction<String>() {
@Override
public String run() {
return System.getProperty(key);
}
});
return value;
}
// Unwrap
catch (final PrivilegedActionException pae) {
final Throwable t = pae.getCause();
// Rethrow
if (t instanceof SecurityException) {
throw (SecurityException) t;
}
if (t instanceof NullPointerException) {
throw (NullPointerException) t;
} else if (t instanceof IllegalArgumentException) {
throw (IllegalArgumentException) t;
} else {
// No other checked Exception thrown by System.getProperty
try {
throw (RuntimeException) t;
}
// Just in case we've really messed up
catch (final ClassCastException cce) {
throw new RuntimeException("Obtained unchecked Exception; this code should never be reached", t);
}
}
}
}
static String getEnvProperty(final String key) {
try {
String value = AccessController.doPrivileged(new PrivilegedExceptionAction<String>() {
@Override
public String run() {
return System.getenv(key);
}
});
return value;
}
// Unwrap
catch (final PrivilegedActionException pae) {
final Throwable t = pae.getCause();
// Rethrow
if (t instanceof SecurityException) {
throw (SecurityException) t;
}
if (t instanceof NullPointerException) {
throw (NullPointerException) t;
} else if (t instanceof IllegalArgumentException) {
throw (IllegalArgumentException) t;
} else {
// No other checked Exception thrown by System.getProperty
try {
throw (RuntimeException) t;
}
// Just in case we've really messed up
catch (final ClassCastException cce) {
throw new RuntimeException("Obtained unchecked Exception; this code should never be reached", t);
}
}
}
}
static Properties getProperties() {
try {
return AccessController.doPrivileged(new PrivilegedExceptionAction<Properties>() {
@Override
public Properties run() {
return System.getProperties();
}
});
}
// Unwrap
catch (final PrivilegedActionException pae) {
final Throwable t = pae.getCause();
// Rethrow
if (t instanceof SecurityException) {
throw (SecurityException) t;
}
if (t instanceof NullPointerException) {
throw (NullPointerException) t;
} else if (t instanceof IllegalArgumentException) {
throw (IllegalArgumentException) t;
} else {
// No other checked Exception thrown by System.getProperty
try {
throw (RuntimeException) t;
}
// Just in case we've really messed up
catch (final ClassCastException cce) {
throw new RuntimeException("Obtained unchecked Exception; this code should never be reached", t);
}
}
}
}
Create a new instance by finding a constructor that matches the argumentTypes signature
using the arguments for instantiation.
Author: Aslak Knutsen, ALR Params: - className – Full classname of class to create
- argumentTypes – The constructor argument types
- arguments – The constructor arguments
Throws: - IllegalArgumentException – if className, argumentTypes, or arguments are null
- RuntimeException – if any exceptions during creation
Returns: a new instance
/**
* Create a new instance by finding a constructor that matches the argumentTypes signature
* using the arguments for instantiation.
*
* @param className Full classname of class to create
* @param argumentTypes The constructor argument types
* @param arguments The constructor arguments
* @return a new instance
* @throws IllegalArgumentException if className, argumentTypes, or arguments are null
* @throws RuntimeException if any exceptions during creation
* @author <a href="mailto:aslak@conduct.no">Aslak Knutsen</a>
* @author <a href="mailto:andrew.rubinger@jboss.org">ALR</a>
*/
static <T> T newInstance(final Class<T> implClass, final Class<?>[] argumentTypes, final Object[] arguments) {
if (implClass == null) {
throw new IllegalArgumentException("ImplClass must be specified");
}
if (argumentTypes == null) {
throw new IllegalArgumentException("ArgumentTypes must be specified. Use empty array if no arguments");
}
if (arguments == null) {
throw new IllegalArgumentException("Arguments must be specified. Use empty array if no arguments");
}
final T obj;
try {
Constructor<T> constructor = getConstructor(implClass, argumentTypes);
if (!constructor.isAccessible()) {
constructor.setAccessible(true);
}
obj = constructor.newInstance(arguments);
} catch (Exception e) {
throw new RuntimeException("Could not create new instance of " + implClass, e);
}
return obj;
}
Obtains the Constructor specified from the given Class and argument types
Params: - clazz –
- argumentTypes –
Throws: Returns:
/**
* Obtains the Constructor specified from the given Class and argument types
*
* @param clazz
* @param argumentTypes
* @return
* @throws NoSuchMethodException
*/
static <T> Constructor<T> getConstructor(final Class<T> clazz, final Class<?>... argumentTypes)
throws NoSuchMethodException {
try {
return AccessController.doPrivileged(new PrivilegedExceptionAction<Constructor<T>>() {
public Constructor<T> run() throws NoSuchMethodException {
return clazz.getDeclaredConstructor(argumentTypes);
}
});
}
// Unwrap
catch (final PrivilegedActionException pae) {
final Throwable t = pae.getCause();
// Rethrow
if (t instanceof NoSuchMethodException) {
throw (NoSuchMethodException) t;
}
else {
// No other checked Exception thrown by Class.getConstructor
try {
throw (RuntimeException) t;
}
// Just in case we've really messed up
catch (final ClassCastException cce) {
throw new RuntimeException("Obtained unchecked Exception; this code should never be reached", t);
}
}
}
}
}