/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.kernel.plugins.dependency;
import java.security.AccessControlContext;
import java.security.AccessController;
import java.security.SecurityPermission;
import java.util.HashSet;
import java.util.Set;
import org.jboss.beans.info.spi.BeanInfo;
import org.jboss.beans.metadata.plugins.AbstractBeanMetaData;
import org.jboss.beans.metadata.spi.AliasMetaData;
import org.jboss.beans.metadata.spi.BeanMetaData;
import org.jboss.dependency.plugins.AbstractControllerContext;
import org.jboss.dependency.plugins.AbstractDependencyInfo;
import org.jboss.dependency.spi.Controller;
import org.jboss.dependency.spi.ControllerMode;
import org.jboss.dependency.spi.DependencyInfo;
import org.jboss.dependency.spi.DependencyItem;
import org.jboss.dependency.spi.ErrorHandlingMode;
import org.jboss.kernel.Kernel;
import org.jboss.kernel.plugins.config.Configurator;
import org.jboss.kernel.spi.dependency.KernelController;
import org.jboss.kernel.spi.dependency.KernelControllerContext;
import org.jboss.reflect.spi.MethodInfo;
import org.jboss.util.JBossStringBuilder;
/**
* Controller context.
*
* @author <a href="adrian@jboss.com">Adrian Brock</a>
* @author <a href="ales.justin@jboss.com">Ales Justin</a>
* @version $Revision: 81226 $
*/
public class AbstractKernelControllerContext extends AbstractControllerContext implements KernelControllerContext
{
/** The default actions */
private static final KernelControllerContextActions actions = KernelControllerContextActions.getInstance();
/** The no instantiate actions */
private static final KernelControllerContextActions noInstantiate = KernelControllerContextActions.getNoInstantiate();
/** The get classloader permission */
private static final RuntimePermission GET_CLASSLOADER_PERMISSION = new RuntimePermission("getClassLoader");
/** The access control context permission */
private static final SecurityPermission GET_ACCESS_CONTROL_CONTEXT_PERMISSION = new SecurityPermission("getAccessControlContext");
/** The BeanInfo */
private BeanInfo info;
/** The meta data */
private BeanMetaData metaData;
/** The access control context */
private AccessControlContext accessContext;
/** Did we do a initialVisit */
private boolean isInitialProcessed;
/** Did we do a describeVisit */
private boolean isDescribeProcessed;
/**
* Determine the aliases
*
* @param metaData the bean meta data
* @return the aliases
*/
private static Set<Object> determineAliases(BeanMetaData metaData)
{
if (metaData == null)
return null;
// FIXME THIS IS HACK
if (metaData instanceof AbstractBeanMetaData)
{
AbstractBeanMetaData abmd = (AbstractBeanMetaData) metaData;
Set<AliasMetaData> aliasMetaDatas = abmd.getAliasMetaData();
if (aliasMetaDatas != null && aliasMetaDatas.isEmpty() == false)
{
Set<Object> aliases = abmd.getAliases();
if (aliases == null)
{
aliases = new HashSet<Object>();
abmd.setAliases(aliases);
}
for (AliasMetaData aliasMetaData : aliasMetaDatas)
aliases.add(aliasMetaData.getAliasValue());
}
}
return metaData.getAliases();
}
/**
* Create an abstract controller context
*
* @param info the bean info
* @param metaData the meta data
* @param target any target object
*/
public AbstractKernelControllerContext(BeanInfo info, BeanMetaData metaData, Object target)
{
super(metaData.getName(), determineAliases(metaData), target == null ? actions : noInstantiate, new AbstractDependencyInfo(), target);
this.info = info;
this.metaData = metaData;
ControllerMode mode = metaData.getMode();
if (mode != null)
setMode(mode);
ErrorHandlingMode errorHandlingMode = metaData.getErrorHandlingMode();
if (errorHandlingMode != null)
setErrorHandlingMode(errorHandlingMode);
boolean autowireCandidate = metaData.isAutowireCandidate();
getDependencyInfo().setAutowireCandidate(autowireCandidate);
if (System.getSecurityManager() != null)
accessContext = AccessController.getContext();
initKernelScopeInfo();
}
public Kernel getKernel()
{
KernelController controller = (KernelController) getController();
if (controller == null)
throw new IllegalStateException("Context is not installed in controller");
return controller.getKernel();
}
public BeanInfo getBeanInfo()
{
return info;
}
/**
* Set the bean info
*
* @param info the bean info
*/
public void setBeanInfo(BeanInfo info)
{
this.info = info;
infoprocessMetaData();
flushJBossObjectCache();
}
public BeanMetaData getBeanMetaData()
{
return metaData;
}
public void toString(JBossStringBuilder buffer)
{
if (metaData != null)
buffer.append(" metadata=").append(metaData);
super.toString(buffer);
}
public void setController(Controller controller)
{
super.setController(controller);
preprocessMetaData();
}
@Override
protected void initScopeInfo()
{
// nothing
}
protected void initKernelScopeInfo()
{
String className = null;
Object target = getTarget();
if (target != null)
className = target.getClass().getName();
BeanMetaData bmd = getBeanMetaData();
if (bmd != null)
{
String bean = bmd.getBean();
if (bean != null)
className = bean;
}
setScopeInfo(new KernelScopeInfo(getName(), className, bmd));
}
/**
* Preprocess the metadata for this context
*/
protected void preprocessMetaData()
{
if (metaData == null)
return;
if (isInitialProcessed) return;
PreprocessMetaDataVisitor visitor = new PreprocessMetaDataVisitor(metaData, this);
AccessController.doPrivileged(visitor);
isInitialProcessed = true;
}
/**
* Preprocess the metadata for this context
*/
protected void infoprocessMetaData()
{
if (info == null)
{
removeClassContextReference();
return;
}
if (isDescribeProcessed) return;
DescribedMetaDataVisitor visitor = new DescribedMetaDataVisitor(metaData, this);
AccessController.doPrivileged(visitor);
isDescribeProcessed = true;
}
/**
* Get the access control context of the code that created this context.<p>
* <p/>
* This will be null when there is no security manager.
*
* @return any access control context
*/
public AccessControlContext getAccessControlContext()
{
SecurityManager sm = System.getSecurityManager();
if (sm != null)
sm.checkPermission(GET_ACCESS_CONTROL_CONTEXT_PERMISSION);
return accessContext;
}
private void removeClassContextReference()
{
DependencyInfo dependencyInfo = getDependencyInfo();
if (dependencyInfo != null)
{
// remove all dependency items that hold class ref
Set<DependencyItem> dependencys = dependencyInfo.getIDependOn(ClassContextDependencyItem.class);
dependencys.addAll(dependencyInfo.getIDependOn(CallbackDependencyItem.class));
for (DependencyItem di : dependencys)
{
// can cast because of getIDepend method impl
ClassDependencyItem cdi = (ClassDependencyItem)di;
cdi.clear(getController());
}
}
}
protected BeanInfo getInfo()
{
if (info == null)
throw new IllegalArgumentException("Null BeanInfo");
return info;
}
public Object get(final String name) throws Throwable
{
return getInfo().getProperty(getTarget(), name);
}
public void set(final String name, final Object value) throws Throwable
{
getInfo().setProperty(getTarget(), name, value);
}
public Object invoke(final String name, final Object[] parameters, final String[] signature) throws Throwable
{
validateMethodValues(name, signature, parameters);
return getInfo().invoke(getTarget(), name, signature, parameters);
}
// todo - remove or better security
public ClassLoader getClassLoader() throws Throwable
{
SecurityManager sm = System.getSecurityManager();
if (sm != null)
sm.checkPermission(GET_CLASSLOADER_PERMISSION);
return Configurator.getClassLoader(getBeanMetaData());
}
/**
* Validate method invocation.
* Use jsr303 constraints.
*
* @param name the method name
* @param signature the method signature
* @param paramaters the parameter values
* @throws Throwable for any error
*/
protected void validateMethodValues(String name, String[] signature, Object[] paramaters) throws Throwable
{
BeanValidatorBridge bridge = KernelControllerContextAction.getBeanValidatorBridge(this);
if (bridge != null)
{
MethodInfo methodInfo = Configurator.findMethodInfo(getInfo().getClassInfo(), name, signature);
bridge.validateMethodValues(this, getTarget(), methodInfo, paramaters);
}
}
}