/*
* Copyright 2012 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Eclipse Public License version 1.0, available at
* http://www.eclipse.org/legal/epl-v10.html
*/
package org.jboss.forge.shell.command;
import java.lang.annotation.Annotation;
import java.lang.reflect.Array;
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.events.CommandMissing;
import org.jboss.forge.shell.events.PreCommandExecution;
import org.jboss.forge.shell.exceptions.CommandExecutionException;
import org.jboss.forge.shell.plugins.AliasLiteral;
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, new AliasLiteral(command.getParent().getName()));
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 if(parmTypes[i].isArray() && parmTypes[i].getComponentType().isEnum())
{
Object[] array = (Object[]) parameterArray[i];
if (array != null)
{
Object enums = Array.newInstance(parmTypes[i].getComponentType(), array.length);
for (int ctr = 0; ctr < array.length; ctr++)
{
Array.set(enums, ctr, Enums.valueOf(parmTypes[i].getComponentType(), array[ctr]));
}
paramStaging[i] = enums;
}
}
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);
Status status = Status.FAILURE;
ClassLoader current = Thread.currentThread().getContextClassLoader();
boolean vetoed = false;
try
{
Thread.currentThread().setContextClassLoader(plugin.getClass().getClassLoader());
PreCommandExecution event = new PreCommandExecution(command, originalStatement, parameterArray);
manager.fireEvent(event, new Annotation[0]);
vetoed = event.isVetoed();
if (!vetoed)
{
command.getMethod().invoke(plugin, paramStaging);
status = Status.SUCCESS;
}
}
catch (Exception e)
{
throw new CommandExecutionException(command, e);
}
finally
{
Thread.currentThread().setContextClassLoader(current);
if (!vetoed)
{
manager.fireEvent(new CommandExecuted(status, command, originalStatement, parameterArray),
new Annotation[0]);
}
}
}
}
}
else
{
manager.fireEvent(new CommandMissing(originalStatement, parameterArray));
}
}
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 + "]";
}
}