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Command servlet for routing web requests to Spring beans

There is a newer version: 2.6.0

package com.cedarsoftware.servlet

import groovy.transform.CompileStatic

/**
 * @author John DeRegnaucourt ([email protected])
 *         

 *         Copyright (c) Cedar Software LLC
 *         


 *         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.
 */
@CompileStatic
class Envelope
{
    final boolean status
    Throwable exception
    Object data

    Envelope(Object data, boolean status)
    {
        if (data instanceof GString)
        {
            data = data.toString()
        }
        this.data = data
        this.status = status
        String message

        if (!status)
        {
            if (data instanceof String)
            {
                message = data as String
            }
            else if (data != null)
            {
                message = data.toString()
            }
            else
            {
                message = 'No error data.'
            }
            this.exception = new IllegalArgumentException(message)
        }
    }

    Envelope(Object data, boolean status, Throwable exception)
    {
        if (data instanceof GString)
        {
            data = data.toString()
        }
        this.data = data
        this.status = status
        this.exception = exception
    }

    def asType(Class target)
    {
        if (Map.isAssignableFrom(target))
        {
            Map map = new LinkedHashMap()
            map.status = status
            if (exception)
            {
                map.exception = exception
            }
            map.data = data
            return map
        }
        else if (Envelope.isAssignableFrom(target))
        {
            return this
        }
        else
        {
            throw new IllegalArgumentException("Cannot convert Envelope to ${target.name}")
        }
    }
}