Application: gvSIG desktop

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 * 

 * 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.

 * 

 */

/*

 * AUTHORS (In addition to CIT):

 * 2009 {}  {{Task}}

 */

package org.gvsig.fmap.dal.resource.spi;

import java.util.ArrayList;

import java.util.List;

import org.gvsig.fmap.dal.DALLocator;

import org.gvsig.fmap.dal.exception.InitializeException;

import org.gvsig.fmap.dal.resource.ResourceParameters;

import org.gvsig.fmap.dal.resource.exception.AccessResourceException;

import org.gvsig.fmap.dal.resource.exception.PrepareResourceException;

import org.gvsig.fmap.dal.resource.exception.ResourceException;

import org.gvsig.fmap.dal.resource.exception.ResourceNotifyChangesException;

import org.gvsig.fmap.dal.resource.exception.ResourceNotifyCloseException;

import org.gvsig.fmap.dal.resource.exception.ResourceNotifyDisposeException;

import org.gvsig.fmap.dal.resource.exception.ResourceNotifyOpenException;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * Resource implementation which is able to show an unique interface to a group

 * of Resources.

 * 

 * @author 2009- <a href="cordinyana@gvsig.org">C?sar Ordi?ana</a> - gvSIG team

 */

public class MultiResource extends AbstractResource {

        public static final String TYPE_NAME = "multi";

        public static final String DESCRIPTION = "Group of multiple resources";

        private static final Logger LOG =

                        LoggerFactory.getLogger(MultiResource.class);

        private List resources = new ArrayList();

        // Initially, the first one

        private int defaultResourcePos = 0;

        /**

         * Creates a new {@link MultiResource} from the given parameters.

         * 

         * @param parameters

         *            to create the resource from

         * @throws InitializeException

         *             if there is an error creating the resource

         */

        public MultiResource(MultiResourceParameters parameters)

                        throws InitializeException {

                super(parameters);

        }

        private List getResources() {

                return resources;

        }

        /**

         * Adds a new {@link ResourceProvider} to the list of Resources managed by

         * this group.

         * 

         * @param parameters

         *            to create the resource from

         * @param defaultResource

         *            if the added resource is to be used as the multi resource

         *            default one

         * @throws InitializeException

         *             if there is an error adding the resource

         */

        public void addResource(ResourceParameters parameters,

                        boolean defaultResource) throws InitializeException {

                ResourceProvider resourceProvider =

                                ((ResourceManagerProviderServices) DALLocator.getResourceManager()).createResource(parameters);

                resources.add(resourceProvider);

                if (defaultResource) {

                        defaultResourcePos = resources.size() - 1;

                }

        }

        /**

         * Adds a new {@link ResourceProvider} to the list of Resources managed by

         * this group.

         * 

         * @param name

         *            of the resource to add

         * @param params

         *            parameters to create the resource with

         * @param defaultResource

         *            if the added resource is to be used as the multi resource

         *            default one

         * @throws InitializeException

         *             if there is an error adding the resource

         */

        public void addResource(String name, Object[] params,

                        boolean defaultResource) throws InitializeException {

                ResourceProvider resourceProvider =

                                ((ResourceManagerProviderServices) DALLocator.getResourceManager()).createResource(

                                                name, params);

                resources.add(resourceProvider);

                if (defaultResource) {

                        defaultResourcePos = resources.size() - 1;

                }

        }

        public boolean isThis(ResourceParameters parameters)

                        throws ResourceException {

                if (parameters instanceof MultiResourceParameters) {

                        MultiResourceParameters multiParams =

                                        (MultiResourceParameters) parameters;

                        return multiParams.getName() != null

                                        && multiParams.getName().equals(

                                                        getMultiResourceParameters().getName());

                }

                return false;

        }

        public void notifyChanges() throws ResourceNotifyChangesException {

                List resources = getResources();

                for (int i = 0; i < resources.size(); i++) {

                        ((ResourceProvider) getResources().get(i)).notifyChanges();

                }

        }

        public void notifyClose() throws ResourceNotifyCloseException {

                List resources = getResources();

                for (int i = 0; i < resources.size(); i++) {

                        ((ResourceProvider) getResources().get(i)).notifyClose();

                }

        }

        public void notifyDispose() throws ResourceNotifyDisposeException {

                List resources = getResources();

                for (int i = 0; i < resources.size(); i++) {

                        ((ResourceProvider) getResources().get(i)).notifyDispose();

                }

        }

        public void notifyOpen() throws ResourceNotifyOpenException {

                List resources = getResources();

                for (int i = 0; i < resources.size(); i++) {

                        ((ResourceProvider) getResources().get(i)).notifyOpen();

                }

        }

        public void prepare() throws PrepareResourceException {

                List resources = getResources();

                for (int i = 0; i < resources.size(); i++) {

                        ((ResourceProvider) getResources().get(i)).prepare();

                }

        }

        public void closeRequest() throws ResourceException {

                List resources = getResources();

                for (int i = 0; i < resources.size(); i++) {

                        ((ResourceProvider) getResources().get(i)).closeRequest();

                }

        }

        public Object get() throws AccessResourceException {

                ResourceProvider defaultResource = getDefaultResource();

                if (defaultResource == null) {

                        return null;

                } else {

                        return defaultResource.get();

                }

        }

        public Object getData() {

                ResourceProvider defaultResource = getDefaultResource();

                if (defaultResource == null) {

                        return null;

                } else {

                        return defaultResource.getData();

                }

        }

        private MultiResourceParameters getMultiResourceParameters() {

                return (MultiResourceParameters) getParameters();

        }

        public String getName() throws AccessResourceException {

                StringBuffer buffer =

                                new StringBuffer().append("MultiResource ").append(

                                                getMultiResourceParameters().getName()).append(":: ");

                List resources = getResources();

                for (int i = 0; i < resources.size(); i++) {

                        buffer.append(((ResourceProvider) resources.get(i)).getName());

                        if (defaultResourcePos == i) {

                                buffer.append(" (default)");

                        }

                        if (i < resources.size() - 1) {

                                buffer.append(", ");

                        }

                }

                return buffer.toString();

        }

        public String toString() {

                try {

                        return getName();

                } catch (AccessResourceException e) {

                        LOG.error("Error getting the resource name", e);

                }

                return super.toString();

        }

        private ResourceProvider getDefaultResource() {

                if (getResources().size() > 0) {

                        return (ResourceProvider) getResources().get(defaultResourcePos);

                } else {

                        return null;

                }

        }

        public void setData(Object data) {

                ResourceProvider defaultResource = getDefaultResource();

                if (defaultResource != null) {

                        defaultResource.setData(data);

                }

        }

}