/*
* Copyright (c) 2003 The Visigoth Software Society. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowledgement:
* "This product includes software developed by the
* Visigoth Software Society (http://www.visigoths.org/)."
* Alternately, this acknowledgement may appear in the software itself,
* if and wherever such third-party acknowledgements normally appear.
*
* 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the
* project contributors may be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact visigoths@visigoths.org.
*
* 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
* nor may "FreeMarker" or "Visigoth" appear in their names
* without prior written permission of the Visigoth Software Society.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Visigoth Software Society. For more
* information on the Visigoth Software Society, please see
* http://www.visigoths.org/
*/
package freemarker.ext.beans;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.List;
import freemarker.template.SimpleNumber;
import freemarker.template.TemplateMethodModelEx;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateModelException;
import freemarker.template.TemplateSequenceModel;
import freemarker.template.utility.Collections12;
/**
* A class that will wrap a reflected method call into a
* {@link freemarker.template.TemplateMethodModel} interface.
* It is used by {@link BeanModel} to wrap reflected method calls
* for overloaded methods.
* @author Attila Szegedi, szegedia at users dot sourceforge dot net
* @version $Id: OverloadedMethodModel.java,v 1.25 2005/06/11 12:12:04 szegedia Exp $
*/
class OverloadedMethodModel
implements
TemplateMethodModelEx,
TemplateSequenceModel
{
private final Object object;
private final MethodMap methodMap;
public OverloadedMethodModel(Object object, MethodMap methodMap)
{
this.object = object;
this.methodMap = methodMap;
}
/**
* Invokes the method, passing it the arguments from the list. The actual
* method to call from several overloaded methods will be chosen based
* on the classes of the arguments.
* @throws TemplateModelException if the method cannot be chosen
* unambiguously.
*/
public Object exec(List arguments)
throws
TemplateModelException
{
MemberAndArguments maa = methodMap.getMemberAndArguments(arguments);
Method method = (Method)maa.getMember();
try {
return methodMap.getWrapper().invokeMethod(object, method, maa.getArgs());
}
catch(Exception e)
{
while(e instanceof InvocationTargetException)
{
Throwable t = ((InvocationTargetException)e).getTargetException();
if(t instanceof Exception)
{
e = (Exception)t;
}
else
{
break;
}
}
if((method.getModifiers() & Modifier.STATIC) != 0)
{
throw new TemplateModelException("Method " + method +
" threw an exception", e);
}
else
{
StringBuffer buf = new StringBuffer();
Object[] args = maa.getArgs();
for(int i = 0; i < args.length; ++i)
{
Object arg = args[i];
buf.append(arg == null ? "null" : arg.getClass().getName()).append(',');
}
throw new TemplateModelException("Method " + method +
" threw an exception when invoked on " + object +
" with arguments of types [" + buf + "]", e);
}
}
}
public TemplateModel get(int index) throws TemplateModelException
{
return (TemplateModel) exec(Collections12.singletonList(
new SimpleNumber(new Integer(index))));
}
public int size() throws TemplateModelException
{
throw new TemplateModelException("?size is unsupported for: " +
getClass().getName());
}
}