
/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002 The Apache Software Foundation.  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 acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" and
 *    "Apache POI" must not be used to endorse or promote products
 *    derived from this software without prior written permission. For
 *    written permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    "Apache POI", nor may "Apache" appear in their name, without
 *    prior written permission of the Apache Software Foundation.
 *
 * 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 APACHE SOFTWARE FOUNDATION 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 Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

import java.io.InputStreamReader;
import java.io.BufferedReader;
import java.io.IOException;

import org.apache.tools.ant.taskdefs.Property;

/**
 * Task to ask property values to the user. Uses current value as default.
 *
 * @author <a href="mailto:barozzi@nicolaken.com">Nicola Ken Barozzi</a>
 * @created 14 January 2002
 */

public class UserInput
    extends org.apache.tools.ant.Task
{
    private String question;
    private String name;
    private String value;

    /**
     * Constructor.
     */

    public UserInput()
    {
        super();
    }

    /**
     * Initializes the task.
     */

    public void init()
    {
        super.init();
        question = "?";
    }

    /**
     * Run the task.
     * @exception org.apache.tools.ant.BuildException The exception raised during task execution.
     */

    public void execute()
        throws org.apache.tools.ant.BuildException
    {
        value = project.getProperty(name);
        String defaultvalue = value;

        // if the property exists
        if (value != null)
        {
            System.out.println("\n" + question + " [" + value + "] ");
            BufferedReader reader =
                new BufferedReader(new InputStreamReader(System.in));

            try
            {
                value = reader.readLine();
            }
            catch (IOException e)
            {
                value = defaultvalue;
            }
            if (!value.equals(""))
            {
                project.setProperty(name, value);
            }
            else
            {
                project.setProperty(name, defaultvalue);
            }
        }
    }

    /**
     * Sets the prompt text that will be presented to the user.
     * @param prompt String
     */

    public void addText(String question)
    {
        this.question = question;
    }

    public void setQuestion(String question)
    {
        this.question = question;
    }

    public void setName(String name)
    {
        this.name = name;
    }
}
