/*
* JBoss, by Red Hat.
* Copyright 2010, Red Hat, Inc., and individual contributors
* 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.forge.shell.command;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.Set;
import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
import javax.inject.Inject;
import org.jboss.forge.shell.Shell;
import org.jboss.forge.shell.constraint.ConstraintEnforcer;
import org.jboss.forge.shell.constraint.ConstraintException;
import org.jboss.forge.shell.events.CommandExecuted;
import org.jboss.forge.shell.events.CommandExecuted.Status;
import org.jboss.forge.shell.exceptions.CommandExecutionException;
import org.jboss.forge.shell.exceptions.NoSuchCommandException;
import org.jboss.forge.shell.plugins.PipeOut;
import org.jboss.forge.shell.plugins.Plugin;
import org.jboss.forge.shell.util.Enums;
import org.mvel2.DataConversion;
import org.mvel2.util.ParseTools;
/**
* @author <a href="mailto:lincolnbaxter@gmail.com">Lincoln Baxter, III</a>
* @author <a href="mailto:koen.aers@gmail.com">Koen Aers</a>
*/
public class Execution
{
private final BeanManager manager;
private CommandMetadata command;
private Object[] parameterArray;
private String originalStatement;
private boolean scriptOnly;
@Inject
public Execution(final BeanManager manager)
{
this.manager = manager;
}
public void verifyConstraints(final Shell shell)
{
ConstraintEnforcer enforcer = new ConstraintEnforcer();
if (command != null)
{
try
{
// TODO this is where more complex constraints could be handled on individual commands
if (!command.isSetup())
enforcer.verifyAvailable(shell.getCurrentProject(), command.getParent());
}
catch (ConstraintException e)
{
throw new CommandExecutionException(command, e);
}
}
}
@SuppressWarnings("unchecked")
public void perform(final PipeOut pipeOut)
{
if (command != null)
{
Class<? extends Plugin> pluginType = command.getParent().getType();
Set<Bean<?>> beans = manager.getBeans(pluginType);
Bean<?> bean = manager.resolve(beans);
Method method = command.getMethod();
Class<?>[] parmTypes = method.getParameterTypes();
Object[] paramStaging = new Object[parameterArray.length];
for (int i = 0; i < parmTypes.length; i++)
{
try
{
if (parmTypes[i].isEnum())
{
paramStaging[i] = Enums.valueOf(parmTypes[i], parameterArray[i]);
}
else
{
paramStaging[i] = DataConversion.convert(parameterArray[i], parmTypes[i]);
if (isBooleanOption(parmTypes[i]) && (null == paramStaging[i]))
{
paramStaging[i] = false;
}
}
}
catch (Exception e)
{
OptionMetadata option = command.getOptionByAbsoluteIndex(i);
String name = null;
if (option.isNamed())
{
name = "--" + option.getName();
}
else
{
name = "at index [" + option.getIndex() + "]";
}
throw new CommandExecutionException(command, "command option '"
+ name
+ "' must be of type '" + parmTypes[i].getSimpleName() + "'", e);
}
}
Plugin plugin;
if (bean != null)
{
CreationalContext<? extends Plugin> context = (CreationalContext<? extends Plugin>) manager
.createCreationalContext(bean);
if (context != null)
{
plugin = (Plugin) manager.getReference(bean, pluginType, context);
boolean success = false;
try
{
command.getMethod().invoke(plugin, paramStaging);
success = true;
}
catch (Exception e)
{
throw new CommandExecutionException(command, e);
}
finally
{
if (success)
manager.fireEvent(new CommandExecuted(Status.SUCCESS, command), new Annotation[] {});
else
manager.fireEvent(new CommandExecuted(Status.FAILURE, command), new Annotation[] {});
}
}
}
}
else
{
// TODO it would be nice if this delegated to the system forge
throw new NoSuchCommandException(command, "No such command: " + originalStatement);
}
}
private static boolean isBooleanOption(final Class<?> type)
{
return ParseTools.unboxPrimitive(type) == boolean.class;
}
public CommandMetadata getCommand()
{
return command;
}
public void setCommand(final CommandMetadata command)
{
this.command = command;
}
public boolean isScriptOnly()
{
return scriptOnly;
}
public void setScriptOnly(final boolean scriptOnly)
{
this.scriptOnly = scriptOnly;
}
public Object[] getParameterArray()
{
return parameterArray;
}
public void setParameterArray(final Object... parameters)
{
this.parameterArray = parameters;
}
public String getOriginalStatement()
{
return originalStatement;
}
public void setOriginalStatement(final String originalStatement)
{
this.originalStatement = originalStatement;
}
@Override
public String toString()
{
return "Execution [" + originalStatement + "]";
}
}