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//
// ========================================================================
// Copyright (c) 1995-2012 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.util.ajax;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import org.eclipse.jetty.util.ajax.JSON.Output;
/* ------------------------------------------------------------ */
/**
* Convert an Object to JSON using reflection on getters methods.
*
*
*
*/
public class JSONObjectConvertor implements JSON.Convertor
{
private boolean _fromJSON;
private Set _excluded=null;
public JSONObjectConvertor()
{
_fromJSON=false;
}
public JSONObjectConvertor(boolean fromJSON)
{
_fromJSON=fromJSON;
}
/* ------------------------------------------------------------ */
/**
* @param fromJSON
* @param excluded An array of field names to exclude from the conversion
*/
public JSONObjectConvertor(boolean fromJSON,String[] excluded)
{
_fromJSON=fromJSON;
if (excluded!=null)
_excluded=new HashSet(Arrays.asList(excluded));
}
public Object fromJSON(Map map)
{
if (_fromJSON)
throw new UnsupportedOperationException();
return map;
}
public void toJSON(Object obj, Output out)
{
try
{
Class c=obj.getClass();
if (_fromJSON)
out.addClass(obj.getClass());
Method[] methods = obj.getClass().getMethods();
for (int i=0;i<methods.length;i++)
{
Method m=methods[i];
if (!Modifier.isStatic(m.getModifiers()) &&
m.getParameterTypes().length==0 &&
m.getReturnType()!=null &&
m.getDeclaringClass()!=Object.class)
{
String name=m.getName();
if (name.startsWith("is"))
name=name.substring(2,3).toLowerCase(Locale.ENGLISH)+name.substring(3);
else if (name.startsWith("get"))
name=name.substring(3,4).toLowerCase(Locale.ENGLISH)+name.substring(4);
else
continue;
if (includeField(name,obj,m))
out.add(name, m.invoke(obj,(Object[])null));
}
}
}
catch (Throwable e)
{
throw new IllegalArgumentException(e);
}
}
protected boolean includeField(String name, Object o, Method m)
{
return _excluded==null || !_excluded.contains(name);
}
}
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