/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001 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 acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Ant", and "Apache Software
 *    Foundation" 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"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * 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/>.
 *
 * Portions of this software are based upon public domain software
 * originally written at the National Center for Supercomputing Applications,
 * University of Illinois, Urbana-Champaign.
 */

package org.apache.tools.ant.taskdefs.optional.perforce;

import org.apache.tools.ant.*;

/** P4Counter - Obtain or set the value of a counter.
 * P4Counter can be used to either print the value of a counter
 * to the output stream for the project (by setting the "name"
 * attribute only), to set a property based on the value of
 * a counter (by setting the "property" attribute) or to set the counter
 * on the perforce server (by setting the "value" attribute). 
 *
 * Example Usage:<br>
 * &lt;p4counter name="${p4.counter}" property=${p4.change}"/&gt;
 * @author <a href="mailto:kirk@radik.com">Kirk Wylie</a>
 */
 
public class P4Counter extends P4Base {
    public String counter = null;
    public String property = null;
    public boolean shouldSetValue = false;
    public boolean shouldSetProperty = false;
    public int value = 0;

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

    public void setValue(int value) {
        this.value = value;
        shouldSetValue = true;
    }

    public void setProperty(String property) {
        this.property = property;
        shouldSetProperty = true;
    }

    public void execute() throws BuildException {

        if((counter == null) || counter.length() == 0) {
            throw new BuildException("No counter specified to retrieve");
        }

        if(shouldSetValue && shouldSetProperty) {
            throw new BuildException("Cannot both set the value of the property and retrieve the value of the property.");
        }

        String command = "counter " + P4CmdOpts + " " + counter;
        if(!shouldSetProperty) {
            // NOTE kirk@radik.com 04-April-2001 -- If you put in the -s, you
            // have to start running through regular expressions here. Much easier
            // to just not include the scripting information than to try to add it
            // and strip it later.
            command = "-s " + command;
        }
        if(shouldSetValue) {
            command += " " + value;
        }

        if(shouldSetProperty) {
            final Project myProj = project;

            P4Handler handler = new P4HandlerAdapter() {
                public void process(String line) {
                    log("P4Counter retrieved line \""+ line + "\"", Project.MSG_VERBOSE);
                    try {
                        value = Integer.parseInt(line);
                        myProj.setProperty(property, ""+value);
                    } catch (NumberFormatException nfe) {
                        throw new BuildException("Perforce error. Could not retrieve counter value.");
                    }
                }
            };

            execP4Command(command, handler);
        } else {
            execP4Command(command, new SimpleP4OutputHandler(this));
        }
    }
}