/*
* 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.joinpoint.plugins.config;
import java.util.Arrays;
import org.jboss.joinpoint.spi.ConstructorJoinpoint;
import org.jboss.joinpoint.spi.FieldGetJoinpoint;
import org.jboss.joinpoint.spi.FieldSetJoinpoint;
import org.jboss.joinpoint.spi.JoinpointException;
import org.jboss.joinpoint.spi.JoinpointFactory;
import org.jboss.joinpoint.spi.MethodJoinpoint;
import org.jboss.logging.Logger;
import org.jboss.reflect.spi.ClassInfo;
import org.jboss.reflect.spi.ConstructorInfo;
import org.jboss.reflect.spi.FieldInfo;
import org.jboss.reflect.spi.MethodInfo;
import org.jboss.reflect.spi.TypeInfo;
/**
* Config utilities.
*
* @author <a href="adrian@jboss.com">Adrian Brock</a>
* @version $Revision: 1.12 $
*/
public class Config
{
/** The log */
protected static final Logger log = Logger.getLogger(Config.class);
/** No parameter types */
private static final String[] NO_PARAMS_TYPES = new String[0];
/** No parameters */
private static final Object[] NO_PARAMS = new Object[0];
/**
* Instantiate an object
*
* @param jpf the join point factory
* @param paramTypes the parameter types
* @param params the parameters
* @return the instantiated object
* @throws Throwable for any error
*/
public static Object instantiate(JoinpointFactory jpf, String[] paramTypes, Object[] params) throws Throwable
{
ConstructorJoinpoint joinpoint = getConstructorJoinpoint(jpf, paramTypes, params);
return joinpoint.dispatch();
}
/**
* Configure a field
*
* @param object the object to configure
* @param jpf the join point factory
* @param name the name of the field
* @param value the value
* @throws Throwable for any error
*/
public static void configure(Object object, JoinpointFactory jpf, String name, Object value) throws Throwable
{
FieldSetJoinpoint joinpoint = getFieldSetJoinpoint(object, jpf, name, value);
joinpoint.dispatch();
}
/**
* Unconfigure a field
*
* @param object the object to unconfigure
* @param jpf the join point factory
* @param name the name of the field
* @throws Throwable for any error
*/
public static void unconfigure(Object object, JoinpointFactory jpf, String name) throws Throwable
{
FieldSetJoinpoint joinpoint = getFieldSetJoinpoint(object, jpf, name, null);
joinpoint.dispatch();
}
/**
* Invoke a method
*
* @param object the object to invoke
* @param jpf the join point factory
* @param name the name of the method
* @param paramTypes the parameter types
* @param params the parameters
* @return the result of the invocation
* @throws Throwable for any error
*/
public static Object invoke(Object object, JoinpointFactory jpf, String name, String[] paramTypes, Object[] params) throws Throwable
{
MethodJoinpoint joinpoint = getMethodJoinpoint(object, jpf, name, paramTypes, params);
return joinpoint.dispatch();
}
/**
* Get a constructor Joinpoint
*
* @param jpf the join point factory
* @return the Joinpoint
* @throws Throwable for any error
*/
public static ConstructorJoinpoint getConstructorJoinpoint(JoinpointFactory jpf) throws Throwable
{
return getConstructorJoinpoint(jpf, null, null);
}
/**
* Get a constructor Joinpoint
*
* @param jpf the join point factory
* @param paramTypes the parameter types
* @param params the parameters
* @return the Joinpoint
* @throws Throwable for any error
*/
public static ConstructorJoinpoint getConstructorJoinpoint(JoinpointFactory jpf, String[] paramTypes, Object[] params) throws Throwable
{
if (paramTypes == null)
paramTypes = NO_PARAMS_TYPES;
if (params == null)
params = NO_PARAMS;
boolean trace = log.isTraceEnabled();
if (trace)
log.trace("Get constructor Joinpoint jpf=" + jpf + " paramTypes=" + Arrays.asList(paramTypes) + " params=" + Arrays.asList(params));
ConstructorInfo constructorInfo = findConstructorInfo(jpf.getClassInfo(), paramTypes);
ConstructorJoinpoint joinpoint = jpf.getConstructorJoinpoint(constructorInfo);
joinpoint.setArguments(params);
return joinpoint;
}
/**
* Get a field get joinpoint
*
* @param object the object to configure
* @param jpf the join point factory
* @param name the name of the field
* @return the Joinpoint
* @throws Throwable for any error
*/
public static FieldGetJoinpoint getFieldGetJoinpoint(Object object, JoinpointFactory jpf, String name) throws Throwable
{
boolean trace = log.isTraceEnabled();
if (trace)
log.trace("Get field get Joinpoint jpf=" + jpf + " target=" + object + " name=" + name);
FieldInfo fieldInfo = findFieldInfo(jpf.getClassInfo(), name);
FieldGetJoinpoint joinpoint = jpf.getFieldGetJoinpoint(fieldInfo);
joinpoint.setTarget(object);
return joinpoint;
}
/**
* Get a field set joinpoint
*
* @param object the object to configure
* @param jpf the join point factory
* @param name the name of the field
* @param value the value
* @return the Joinpoint
* @throws Throwable for any error
*/
public static FieldSetJoinpoint getFieldSetJoinpoint(Object object, JoinpointFactory jpf, String name, Object value) throws Throwable
{
boolean trace = log.isTraceEnabled();
if (trace)
log.trace("Get field set Joinpoint jpf=" + jpf + " target=" + object + " name=" + name + " value=" + value);
FieldInfo fieldInfo = findFieldInfo(jpf.getClassInfo(), name);
FieldSetJoinpoint joinpoint = jpf.getFieldSetJoinpoint(fieldInfo);
joinpoint.setTarget(object);
joinpoint.setValue(value);
return joinpoint;
}
/**
* Get a method joinpoint
*
* @param object the object to invoke
* @param jpf the join point factory
* @param name the name of the method
* @param paramTypes the parameter types
* @param params the parameters
* @return the join point
* @throws Throwable for any error
*/
public static MethodJoinpoint getMethodJoinpoint(Object object, JoinpointFactory jpf, String name, String[] paramTypes, Object[] params) throws Throwable
{
boolean trace = log.isTraceEnabled();
if (trace)
{
if (paramTypes != null)
log.trace("Get method Joinpoint jpf=" + jpf + " target=" + object + " name=" + name + " paramTypes=" + Arrays.asList(paramTypes));
else
log.trace("Get method Joinpoint jpf=" + jpf + " target=" + object + " name=" + name + " paramTypes=()");
}
MethodInfo methodInfo = findMethodInfo(jpf.getClassInfo(), name, paramTypes);
MethodJoinpoint joinpoint = jpf.getMethodJoinpoint(methodInfo);
joinpoint.setTarget(object);
joinpoint.setArguments(params);
return joinpoint;
}
/**
* Find constructor info
*
* @param classInfo the class info
* @param paramTypes the parameter types
* @return the constructor info
* @throws JoinpointException when no such constructor
*/
public static ConstructorInfo findConstructorInfo(ClassInfo classInfo, String[] paramTypes) throws JoinpointException
{
ConstructorInfo[] constructors = classInfo.getDeclaredConstructors();
if (constructors != null)
{
for (int i = 0; i < constructors.length; ++i)
{
if (equals(paramTypes, constructors[i].getParameterTypes()))
return constructors[i];
}
throw new JoinpointException("Constructor not found " + classInfo.getName() + Arrays.asList(paramTypes) + " in " + Arrays.asList(constructors));
}
throw new JoinpointException("Constructor not found " + classInfo.getName() + Arrays.asList(paramTypes) + " no constructors");
}
/**
* Find field info
*
* @param classInfo the class info
* @param name the field name
* @return the field info
* @throws JoinpointException when no such field
*/
public static FieldInfo findFieldInfo(ClassInfo classInfo, String name) throws JoinpointException
{
ClassInfo current = classInfo;
while (current != null)
{
FieldInfo result = locateFieldInfo(current, name);
if (result != null)
return result;
current = current.getSuperclass();
}
throw new JoinpointException("Field not found '" + name + "' for class " + classInfo.getName());
}
/**
* Find field info
*
* @param fieldInfo the field info
* @param name the field name
* @return the field info or null if not found
*/
private static FieldInfo locateFieldInfo(ClassInfo classInfo, String name)
{
FieldInfo[] fields = classInfo.getDeclaredFields();
if (fields != null)
{
for (int i = 0; i < fields.length; ++i)
{
if (name.equals(fields[i].getName()))
return fields[i];
}
}
return null;
}
/**
* Find method info
*
* @param classInfo the class info
* @param name the method name
* @param paramTypes the parameter types
* @return the method info
* @throws JoinpointException when no such method
*/
public static MethodInfo findMethodInfo(ClassInfo classInfo, String name, String[] paramTypes) throws JoinpointException
{
if (paramTypes == null)
paramTypes = NO_PARAMS_TYPES;
ClassInfo current = classInfo;
while (current != null)
{
MethodInfo result = locateMethodInfo(current, name, paramTypes);
if (result != null)
return result;
current = current.getSuperclass();
}
throw new JoinpointException("Method not found " + name + Arrays.asList(paramTypes) + " for class " + classInfo.getName());
}
/**
* Find method info
*
* @param classInfo the class info
* @param name the method name
* @param paramTypes the parameter types
* @return the method info or null if not found
*/
private static MethodInfo locateMethodInfo(ClassInfo classInfo, String name, String[] paramTypes)
{
MethodInfo[] methods = classInfo.getDeclaredMethods();
if (methods != null)
{
for (int i = 0; i < methods.length; ++i)
{
if (name.equals(methods[i].getName()) && equals(paramTypes, methods[i].getParameterTypes()))
return methods[i];
}
}
return null;
}
/**
* Test whether type names are equal to type infos
*
* @param typeNames the type names
* @param typeInfos the type infos
* @return true when they are equal
*/
public static boolean equals(String[] typeNames, TypeInfo[] typeInfos)
{
if (typeNames == null || typeInfos == null)
return false;
if (typeNames.length != typeInfos.length)
return false;
for (int i = 0; i < typeNames.length; ++i)
{
if (typeNames[i] != null && typeNames[i].equals(typeInfos[i].getName()) == false)
return false;
}
return true;
}
}