/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.jsp.cfg;
import com.caucho.config.ConfigException;
import com.caucho.config.types.Signature;
import com.caucho.util.L10N;
import javax.annotation.PostConstruct;
import javax.servlet.jsp.tagext.FunctionInfo;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
/**
* Configuration for the taglib tag in the .tld
*/
public class TldFunction {
private static L10N L = new L10N(TldFunction.class);
private String _name;
private Class _functionClass;
private Signature _signature;
private String _displayName;
private String _description;
private String _example;
private Method _method;
/**
* Sets the function name.
*/
public void setName(String name)
{
_name = name;
}
/**
* Gets the function name.
*/
public String getName()
{
return _name;
}
/**
* Sets the function class.
*/
public void setFunctionClass(Class functionClass)
{
_functionClass = functionClass;
}
/**
* Gets the function class.
*/
public Class getFunctionClass()
{
return _functionClass;
}
/**
* Sets the function signature.
*/
public void setFunctionSignature(Signature signature)
{
_signature = signature;
}
/**
* Gets the function signature.
*/
public Signature getFunctionSignature()
{
return _signature;
}
/**
* Sets the display-name
*/
public void setDisplayName(String displayName)
{
_displayName = displayName;
}
/**
* Gets the display-name
*/
public String getDisplayName()
{
return _displayName;
}
/**
* Sets the description
*/
public void setDescription(String description)
{
_description = description;
}
/**
* Gets the description
*/
public String getDescription()
{
return _description;
}
/**
* Sets the example
*/
public void setExample(String example)
{
_example = example;
}
/**
* Gets the example
*/
public String getExample()
{
return _example;
}
/**
* Returns the underlying method.
*/
public Method getMethod()
{
return _method;
}
/**
* Initialize
*/
@PostConstruct
public void init()
throws ConfigException
{
if (_name == null)
throw new ConfigException(L.l("function needs <name>"));
if (_signature == null)
throw new ConfigException(L.l("function requires <signature>"));
Method []methods = _functionClass.getMethods();
loop:
for (int i = 0; i < methods.length; i++) {
Method method = methods[i];
if (! Modifier.isPublic(method.getModifiers()))
continue;
if (Modifier.isAbstract(method.getModifiers()))
continue;
if (_signature.matches(method)) {
_method = method;
if (! Modifier.isPublic(_method.getModifiers()))
throw new ConfigException(L.l("function `{0}' must be public",
_method));
if (! Modifier.isStatic(_method.getModifiers()))
throw new ConfigException(L.l("function `{0}' must be static",
_method));
if (Modifier.isAbstract(_method.getModifiers()))
throw new ConfigException(L.l("function `{0}' must be concrete",
_method));
return;
}
}
throw new ConfigException(L.l("No public method in `{0}' matches the signature `{1}'",
_functionClass.getName(),
_signature.getSignature()));
}
public FunctionInfo toFunctionInfo()
{
return new FunctionInfo(_name,
_functionClass.getName(),
_signature.getSignature());
}
public String toString()
{
return "TldFunction[" + _signature.getSignature() + "]";
}
}