/*
* Copyright 2010 Andrew Pietsch
*
* Licensed under the Apache License, Version 2.0 (the "License"); you
* may not use this file except in compliance with the License. You may
* obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing permissions
* and limitations under the License.
*/
package com.dragome.forms.bindings.client.function;
/**
* A simple Function that converts any object to a String using it's toString method.
*/
public class ToStringFunction implements Function<String, Object>
{
private String nullValue= "";
public ToStringFunction()
{
}
/**
* Creates a new instance that uses the specified string when the value to
* be formatted is <code>null</code>
*
* @param nullValue the value to return when the source value is null.
*/
public ToStringFunction(String nullValue)
{
this.nullValue= nullValue;
}
public String compute(Object value)
{
return value != null ? value.toString() : nullValue;
}
}