/*

* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

package com.nokia.helium.core.ant.types;

import java.util.ArrayList;

import java.util.List;

import org.apache.tools.ant.types.DataType;

import com.nokia.helium.core.ant.MappedVariable;

/**

 * Helper class to store the command line variables

 * with name / value pair.

 * @ant.type name="arg" category="Core"

 * @ant.type name="makeOption" category="Core"

 */

public class VariableImpl extends DataType implements MappedVariable

{

    private String name;

    private String value;

    private String cmdLine;

    /**

     * Set the name of the variable.

     * @param name

     */

    public void setName(String name) {

        this.name = name;

    }

    /**

     * Get the name of the variable. Will return name is name attribute is set

     * or first command line parameter if line is used.

     * @return name.

     */

    public String getName() {

        if ( cmdLine == null) {

            if (name == null ) { 

                throw new BuildException( "'name' attribute must be defined");

            }

            if (value == null) {

                throw new BuildException( "'value' attribute must be defined");

            }

            return name;

        } else {

            if (name != null  && value != null) { 

                throw new BuildException( "You can define either name, value or line attribute and not both");

            }

            String cmdPart = cmdLine.trim();

            String[] cmdArgs = cmdPart.split(" ");

            return cmdArgs[0];

        }

    }

    /**

     * Set the value of the variable.

     * @param value

     */

    public void setValue(String value) {

        this.value = value;

    }

    /**

     * Helper function to set the command line string

     * @param line, string as input to command line.

     */

    public void setLine(String line) {

        cmdLine = line;

    }

    /**

     * Get the value of the variable. Returns value if name/value are used, or the line attribute minus 

     * the first command line parameter. 

     * @return value.

     */

    public String getValue() {

        if ( cmdLine == null) {

            if (name == null ) { 

                throw new BuildException( "'name' attribute must be defined");

            }

            if (value == null) {

                throw new BuildException( "'value' attribute must be defined");

            }

            return value;

        } else {

            if (name != null  && value != null) { 

                throw new BuildException( "You can define either name, value or line attribute but not both");

            }

            String cmdPart = cmdLine.trim();

            List<String> cmdList = new ArrayList<String>(Arrays.asList(cmdPart.split(" ")));

            if (cmdList.size() > 0) {

                cmdList.remove(0);

            }

            return StringUtils.join(cmdList.toArray(), " "); // "-c armv5 -c foobar" : " armv5 -c foobar"

        }

    }

    /**

     * {@inheritDoc}

     */

    public String getParameter() {

        return getParameter("=");

    }

    /**

     * {@inheritDoc}

     */

    public String getParameter(String separator) {

        if ( cmdLine == null) {

            if (name == null ) { 

                throw new BuildException( "'name' attribute must be defined");

            }

            if (value == null) {

                throw new BuildException( "'value' attribute must be defined");

            }

            return name + separator + value;

        } else {

            if (name != null  && value != null) { 

                throw new BuildException( "You can define either name, value or line attribute but not both");

            }

            return cmdLine;

        }

    }

}