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/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file 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.system.metadata;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import org.jboss.beans.info.spi.BeanInfo;
import org.jboss.dependency.plugins.AbstractDependencyItem;
import org.jboss.dependency.spi.ControllerContext;
import org.jboss.dependency.spi.ControllerState;
import org.jboss.dependency.spi.DependencyItem;
import org.jboss.dependency.spi.dispatch.InvokeDispatchContext;
import org.jboss.kernel.spi.dependency.KernelController;
import org.jboss.kernel.spi.dependency.KernelControllerContext;
import org.jboss.reflect.spi.MethodInfo;
import org.jboss.reflect.spi.TypeInfo;
import org.jboss.system.microcontainer.ServiceControllerContext;
/**
* ServiceInjectionValueMetaData.
*
* @author Brian Stansberry
* @version $Revision: 85290 $
*/
public class ServiceValueFactoryValueMetaData extends AbstractMetaDataVisitorNode
implements ServiceValueMetaData, Serializable
{
private static final long serialVersionUID = 2;
/** The dependency */
private final Object dependency;
/** The method */
private final String method;
private final ServiceTextValueMetaData defaultValue;
private final List parameterMetaData;
private Object[] parameterValues;
private String[] parameterTypes;
/** The required state of the dependency */
private final ControllerState dependentState;
/**
* Create a new ServiceInjectionValueMetaData.
*
* @param dependency the dependency
* @param method the property name
* @param parameters the parameters
* @param dependentState the dependent state
* @param defaultValue the default value
*/
@SuppressWarnings("unchecked")
public ServiceValueFactoryValueMetaData(Object dependency, String method, List parameters, ControllerState dependentState, ServiceTextValueMetaData defaultValue)
{
if (dependency == null)
throw new IllegalArgumentException("Null dependency");
this.dependency = dependency;
if (method == null)
throw new IllegalArgumentException("Null method");
this.method = method;
this.parameterMetaData = (parameters == null ? Collections.EMPTY_LIST : parameters);
this.dependentState = (dependentState == null ? ControllerState.INSTALLED : dependentState);
this.defaultValue = defaultValue;
}
/**
* Get the dependency.
*
* @return the dependency.
*/
public Object getDependency()
{
return dependency;
}
/**
* Get the method.
*
* @return the method.
*/
public String getMethod()
{
return method;
}
public List getParameterMetaData()
{
return parameterMetaData;
}
/**
* Get the dependentState.
*
* @return the dependentState.
*/
public ControllerState getDependentState()
{
return dependentState;
}
public ServiceTextValueMetaData getDefaultValue()
{
return defaultValue;
}
public Object getValue(ServiceValueContext valueContext) throws Throwable
{
KernelController controller = valueContext.getController();
ControllerState state = dependentState;
if (state == null)
state = ControllerState.INSTALLED;
ControllerContext factoryContext = controller.getContext(dependency, state);
if (factoryContext == null)
throw new Error("Should not be here - dependency failed! " + this);
Object result = null;
if (factoryContext instanceof InvokeDispatchContext)
{
InvokeDispatchContext idc = (InvokeDispatchContext) factoryContext;
result = idc.invoke(method, getParameterValues(valueContext, factoryContext), getParameterTypes(valueContext, factoryContext));
}
else
{
throw new IllegalArgumentException(
"Cannot use property attribute, context is not InvokeDispatchContext: " + factoryContext +
", metadata: " + this);
}
if (result == null && this.defaultValue != null)
{
result = this.defaultValue.getValue(valueContext);
}
return result;
}
public void visit(ServiceMetaDataVisitor visitor)
{
ServiceControllerContext context = visitor.getControllerContext();
Object name = context.getName();
ControllerState whenRequired = visitor.getContextState();
DependencyItem item = new AbstractDependencyItem(name, dependency, whenRequired, dependentState);
visitor.addDependency(item);
visitor.visit(this);
}
private Object[] getParameterValues(ServiceValueContext valueContext, ControllerContext factoryContext) throws Exception
{
if (parameterValues != null)
return parameterValues;
if (factoryContext instanceof KernelControllerContext)
{
analyzeParameters(valueContext, (KernelControllerContext) factoryContext);
}
else
{
extractParameters(valueContext);
}
return parameterValues;
}
private String[] getParameterTypes(ServiceValueContext valueContext, ControllerContext factoryContext) throws Exception
{
if (parameterTypes != null)
return parameterTypes;
if (factoryContext instanceof KernelControllerContext)
analyzeParameters(valueContext, (KernelControllerContext) factoryContext);
else
extractParameters(valueContext);
return parameterTypes;
}
private void analyzeParameters(ServiceValueContext valueContext, KernelControllerContext factoryContext) throws Exception
{
BeanInfo beanInfo = factoryContext.getBeanInfo();
Set allMethods = beanInfo.getMethods();
populateParameterTypes(allMethods, method, parameterMetaData);
parameterTypes = new String[parameterMetaData.size()];
parameterValues = new Object[parameterMetaData.size()];
for (int i = 0; i < parameterMetaData.size(); i++)
{
ServiceValueFactoryParameterMetaData metadata = parameterMetaData.get(i);
parameterTypes[i] = metadata.getParameterTypeName();
parameterValues[i] = metadata.getValue(valueContext);
}
}
private void extractParameters(ServiceValueContext valueContext) throws Exception
{
parameterTypes = new String[parameterMetaData.size()];
parameterValues = new Object[parameterMetaData.size()];
for (int i = 0; i < parameterMetaData.size(); i++)
{
ServiceValueFactoryParameterMetaData metadata = parameterMetaData.get(i);
parameterTypes[i] = metadata.getParameterTypeName();
if (parameterTypes[i] == null)
{
parameterTypes = null;
parameterValues = null;
throw new IllegalStateException("No type available for parameter " + i
+ " -- parameter types must be specified to invoke on mbeans");
}
parameterValues[i] = metadata.getValue(valueContext);
}
}
/**
* Attempts to find a method in allMethods whose name and parameters
* match the given arguments. If successful, modifies the {@link ServiceValueFactoryParameterMetaData}
* in the provided list to ensure any null parameterTypeName values are no longer null, but instead
* match the equivalent parameter in the MethodInfo.
*
* If a given ServiceValueFactoryParameterMetaData has no parameterTypeName set, that is treated
* as meaning "matches any parameter type".
*
*
* @param allMethods set of methods to match against
* @param methodName name of method to match
* @param parameterMetaData parameters to the method
*
* @throws IllegalArgumentException if less or more than one MethodInfo matches
*/
public static void populateParameterTypes(Set allMethods, String methodName, List parameterMetaData)
{
List possibleMatches = new ArrayList();
for (MethodInfo mi : allMethods)
{
TypeInfo[] typeInfos = mi.getParameterTypes();
if (methodName.equals(mi.getName()) && typeInfos.length == parameterMetaData.size())
{
boolean match = true;
for (int i = 0; i < typeInfos.length; i++)
{
String ourType = parameterMetaData.get(i).getParameterTypeName();
if (ourType != null && ourType.equals(typeInfos[i].getName()) == false)
{
match = false;
break;
}
}
if (match)
{
possibleMatches.add(mi);
}
}
}
if (possibleMatches.size() == 1)
{
MethodInfo match = possibleMatches.get(0);
TypeInfo[] types = match.getParameterTypes();
for (int i = 0; i < types.length; i++)
{
ServiceValueFactoryParameterMetaData metadata = parameterMetaData.get(i);
if (metadata.getParameterTypeName() == null)
{
metadata.setParameterTypeName(types[i].getName());
}
}
}
else if (possibleMatches.size() == 0)
{
throw new IllegalArgumentException("Cannot match parameters to any method.");
}
else
{
throw new IllegalArgumentException("Cannot match parameters to a single method. Possible matches : " + possibleMatches);
}
}
}
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