/*

* 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.sysdef.ant.taskdefs;

import java.io.File;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import org.apache.tools.ant.BuildException;

import org.apache.tools.ant.util.FileUtils;

import com.nokia.helium.sysdef.ant.types.Filter;

import com.nokia.helium.sysdef.ant.types.FilterSet;

/**

 * <p>This task allows to do the filtering operation on system definition file v3.0.</p>

 * 

 * <p>The following example shows how you can join the X:\layer.sysdef.xml under

 * X:\filtered_layer.sysdef.xml.</p>

 * 

 * E.g:

 * <pre>

 *   <hlm:filterSysdef epocroot="X:\" srcfile="X:\layer.sysdef.xml" 

 *                      destfile="X:\filtered_layer.sysdef.xml">

 *       <filterset> 

 *           <filter filter="test" type="has" /> 

 *       </filterset> 

 *   </hlm:filterSysdef>

 * </pre>

 *

 * For more information about system definition file v3.0 please check 

 * <a href="http://developer.symbian.org/wiki/index.php/System_Definition">http://developer.symbian.org/wiki/index.php/System_Definition</a>.

 *

 * @ant.task name="filterSysdef" category="Sysdef"

 */

public class FilterTask extends AbstractSydefTask {

    private List<FilterSet> filterSets = new ArrayList<FilterSet>();

    /**

     * Create a FilterSet object to store filters.

     * @return a new FilterSet object

     */

    public FilterSet createFilterSet() {

        FilterSet filterset = new FilterSet();

        filterSets.add(filterset);

        return filterset;

    }

    /**

     * Add a FilterSet object.

     */

    public void add(FilterSet filterset) {

        filterSets.add(filterset);

    }

    /**

     * {@inheritDoc}

     */

    public void execute() {

        check();

        if (filterSets.isEmpty()) {

            throw new BuildException("You must define at least one nested filterset element.");

        }

        log("Filtering " + this.getSrcFile());

        for (FilterSet filterSet : filterSets) {

            if (filterSet.isReference()) {

            }

            List<File> toDelete = new ArrayList<File>();

            try {

                File src = this.getSrcFile();

                File dst = null;

                for (Filter filter : filterSet.getFilters()) {

                    dst = File.createTempFile("sysdef", ".xml", this.getEpocroot());

                    toDelete.add(dst);

                    // Dest is the input for next loop.

                    src = dst;

                }

                if (dst != null) {

                    log("Creating " + this.getDestFile());

                    FileUtils.getFileUtils().copyFile(dst, getDestFile());

                } else {

                    // If nothing to do it is just identity, 

                    // so copying the source file

                    log("Creating " + this.getDestFile());

                    FileUtils.getFileUtils().copyFile(getSrcFile(), getDestFile());

                }

            } catch (IOException e) {

                throw new BuildException(e.getMessage(), e);

            } finally {

                for (File file : toDelete) {

                    file.delete();

                }

            }

        }

    }

    /**

     * {@inheritDoc}

     */

    @Override

    }

}