Application: gvSIG desktop

/* gvSIG. Desktop Geographic Information System.

 *

 * Copyright ? 2007-2017 gvSIG Association

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.raster.lib.legend.impl.operations.grayscale;

import java.io.IOException;

import java.io.InputStream;

import java.util.Map;

import org.xmlpull.v1.XmlPullParserException;

import org.gvsig.raster.lib.buffer.api.Buffer;

import org.gvsig.raster.lib.buffer.api.BufferManager;

import org.gvsig.raster.lib.buffer.api.operations.Operation;

import org.gvsig.raster.lib.buffer.api.operations.OperationFactory;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dynobject.DynObject;

import org.gvsig.tools.dynobject.DynObjectManager;

import org.gvsig.tools.dynobject.DynStruct;

/**

 * @author fdiaz

 *

 */

public class GrayScaleOperationFactory implements OperationFactory {

    public static String NAME="GrayScale";

    public static String DESCRIPTION="GrayScale operation";//FIXME:

    private DynStruct definition;

    /**

     *

     */

    public GrayScaleOperationFactory() {

        // TODO Auto-generated constructor stub

    }

    /* (non-Javadoc)

     * @see org.gvsig.raster.lib.buffer.api.operations.OperationFactory#createParameters()

     */

    @Override

    public DynObject createParameters() {

        DynObjectManager manager = ToolsLocator.getDynObjectManager();

        if (definition == null) {

            definition = createParametersDefinition();

        }

        DynObject parameters = manager.createDynObject(definition);

        return parameters;

    }

    /* (non-Javadoc)

     * @see org.gvsig.raster.lib.buffer.api.operations.OperationFactory#create()

     */

    @Override

    public Operation create() {

        return new GrayScaleOperation(this);

    }

    /* (non-Javadoc)

     * @see org.gvsig.raster.lib.buffer.api.operations.OperationFactory#createParametersDefinition()

     */

    @Override

    public DynStruct createParametersDefinition() {

        return registerParametersDefinition("GrayScaleOperationParameters", "/org/gvsig/raster/lib/legend/impl/operations/grayscale/GrayScaleOperationParameters.xml");

    }

    /* (non-Javadoc)

     * @see org.gvsig.raster.lib.buffer.api.operations.OperationFactory#getName()

     */

    @Override

    public String getName() {

        return NAME;

    }

    /* (non-Javadoc)

     * @see org.gvsig.raster.lib.buffer.api.operations.OperationFactory#getDescription()

     */

    @Override

    public String getDescription() {

        return DESCRIPTION;

    }

    /* (non-Javadoc)

     * @see org.gvsig.raster.lib.buffer.api.operations.OperationFactory#isApplicable(org.gvsig.raster.lib.buffer.api.Buffer)

     */

    @Override

    public Applicable isApplicable(Buffer buffer) {

        int bandsCount = buffer.getBandCount();

        int byteBandsCount = 0;

        for(int band = 0; band<bandsCount; band++){

            if (buffer.getBandTypes()[band]==BufferManager.TYPE_BYTE) {

                byteBandsCount++;

            }

        }

        if(byteBandsCount==bandsCount){

            return Applicable.YES;

        } else if (byteBandsCount==0) {

            return Applicable.NO;

        }

        return Applicable.UNKNOW;

    }

    /* (non-Javadoc)

     * @see org.gvsig.raster.lib.buffer.api.operations.OperationFactory#isApplicable(org.gvsig.raster.lib.buffer.api.operations.Operation)

     */

    @Override

    public Applicable isApplicable(Operation operation) {

        //FIXME:

        return Applicable.YES;

    }

    protected DynStruct registerParametersDefinition(String name, String filename) {

        DynStruct definition = null;

        DynObjectManager manager = ToolsLocator.getDynObjectManager();

        definition = manager.get(name);

        if ( definition == null) {

            InputStream stream = this.getClass().getResourceAsStream(filename);

            if( stream == null ) {

                throw new IllegalArgumentException("File '"+filename+"' not found");

            }

            Map<String, DynStruct> definitions = null;

            try {

                definitions = manager.importDynClassDefinitions(stream, this.getClass().getClassLoader());

            } catch (XmlPullParserException e) {

                throw new IllegalArgumentException("DynClass '"+name+"' can't parse file '"+filename+"'",e);

            } catch (IOException e) {

                throw new IllegalArgumentException("DynClass '"+name+"' can't read file '"+filename+"'",e);

            }

            definition = definitions.get(name);

            if ( definition == null) {

                throw new IllegalArgumentException("DynClass '"+name+"' not found in file '"+filename+"'");

            }

        }

        return definition;

    }

}