Revision 35478 branches/v2_0_0_prep/extensions/extCatalog/src/org/gvsig/catalog/loaders/WCSLayerLoader.java
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*/ |
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package org.gvsig.catalog.loaders; |
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import java.io.IOException;
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import java.util.HashMap;
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import java.util.Map; |
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import java.util.TreeMap; |
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import org.gvsig.andami.PluginServices; |
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import org.gvsig.app.project.documents.view.gui.AbstractViewPanel; |
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import org.gvsig.catalog.schemas.Resource; |
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import org.gvsig.fmap.mapcontext.layers.FLayer; |
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import org.gvsig.fmap.dal.DataStoreParameters; |
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import org.gvsig.fmap.dal.exception.InitializeException; |
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import org.gvsig.fmap.dal.exception.ProviderNotRegisteredException; |
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import org.gvsig.i18n.Messages; |
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import org.gvsig.tools.extensionpoint.ExtensionPoint; |
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import org.gvsig.utils.extensionPointsOld.ExtensionPointsSingleton; |
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/** |
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* @author Jorge Piera Llodra (piera_jor@gva.es) |
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*/ |
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public class WCSLayerLoader extends GvSigLayerLoader{
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public WCSLayerLoader(Resource resource) {
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super(resource); |
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} |
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/** |
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* This method loads a WSC layer from a full URL |
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* @param link |
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* @throws LayerLoaderException |
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*/ |
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public void loadLayer() throws LayerLoaderException {
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String link = getResource().getLinkage(); |
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String name = getResource().getName(); |
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try {
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FLayer flayer = createWCSLayer(link,name); |
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addLayerToView(flayer); |
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flayer.dispose(); |
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} catch (IOException e) {
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throw new LayerLoaderException(e.getMessage(),getWindowMessage()); |
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} |
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} |
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private FLayer createWCSLayer(String link,String name) throws IOException, LayerLoaderException {
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Map args = initFromQueryString(link,name); |
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ExtensionPoint extensionPoint = (ExtensionPoint)ExtensionPointsSingleton.getInstance().get("CatalogLayers");
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try {
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return (FLayer)extensionPoint.create("OGC:WCS", args );
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} catch(Exception e) {
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throw new LayerLoaderException(getErrorMessage(),getWindowMessage()); |
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} |
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} |
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/** |
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* Builds a coverage starting from a full GetCoverage URL. |
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* (Using this is not a regular function) |
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*/ |
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private TreeMap initFromQueryString(String link,String name){
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String host = null; |
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String queryString = null; |
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if (link.compareTo("?")==0){
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host = link.substring(0,link.indexOf('?'));
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queryString = link.substring(link.indexOf('?')+1);
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}else{
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host = link; |
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queryString = ""; |
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} |
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queryString = link.substring(link.indexOf('?')+1);
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TreeMap map = new TreeMap(); |
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String[] params = queryString.split("&");
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for (int i = 0; i < params.length; i++) {
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if (params[i]!= null){
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String[] nameValue = params[i].split("=");
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if (nameValue.length == 1){
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map.put(nameValue[0].toUpperCase(), ""); |
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}else if(nameValue.length == 2){
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map.put(nameValue[0].toUpperCase(), nameValue[1]); |
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} |
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} |
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} |
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map.put("HOST",link);
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if ((name != null) && (!name.equals(""))){
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map.put("COVERAGE",name);
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} |
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return map; |
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} |
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/* |
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* (non-Javadoc) |
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* @see es.gva.cit.gvsig.catalogClient.loaders.LayerLoader#getErrorMessage() |
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*/ |
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protected String getErrorMessage() {
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return Messages.getText("wcsError") + ".\n" +
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Messages.getText("link") + ": " +
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getResource().getLinkage(); |
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} |
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/* |
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* (non-Javadoc) |
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* @see es.gva.cit.gvsig.catalogClient.loaders.LayerLoader#getWindowMessage() |
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*/ |
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protected String getWindowMessage() {
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return Messages.getText("wcsLoad");
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} |
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private static final String FIELD_FORMAT = "format"; |
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private static final String FIELD_NAME = "name"; |
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private static final String FIELD_SRSSTR = "srsstr"; |
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private static final String FIELD_URI = "uri"; |
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private static final String FIELD_ONLINERESOURC = "onlineresources"; |
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private static final String FIELD_WIDTH = "width"; |
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private static final String FIELD_HEIGHT = "height"; |
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private static final String FIELD_PARAM = "parameter"; |
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public WCSLayerLoader(Resource resource) {
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super(resource); |
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} |
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protected boolean hasSpecificLayer() {
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return true; |
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} |
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protected String getLayerName() {
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return getResource().getName(); |
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} |
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protected DataStoreParameters createDataStoreParameters() |
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throws InitializeException, ProviderNotRegisteredException {
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DataStoreParameters dataStoreParameters = DATA_MANAGER.createStoreParameters("Wcs Store");
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parseQuery(dataStoreParameters, getResource().getLinkage()); |
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dataStoreParameters.setDynValue(FIELD_NAME, getLayerName()); |
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dataStoreParameters.setDynValue(FIELD_ONLINERESOURC, createOnlineResources()); |
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return dataStoreParameters; |
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} |
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protected Map createOnlineResources() {
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Map args = new HashMap(); |
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args.put("GepCoverage", getResource().getLinkage());
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return args; |
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} |
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protected String extensionPointName() {
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return "OGC:WCS"; |
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} |
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/** |
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* Builds a coverage starting from a full GetCoverage URL. |
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* (Using this is not a regular function) |
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*/ |
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private void parseQuery(DataStoreParameters dataStoreParameters, String link){
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String host = null; |
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String queryString = null; |
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int index = link.indexOf("?");
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if (index > 0){
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host = link.substring(0, index); |
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queryString = link.substring(index+1); |
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}else{
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host = link; |
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queryString = ""; |
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} |
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queryString = link.substring(link.indexOf('?')+1);
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dataStoreParameters.setDynValue(FIELD_URI, link.substring(0,link.indexOf('?')));
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String[] params = queryString.split("&");
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for (int i = 0; i < params.length; i++) {
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if (params[i]!= null){
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String[] nameValue = params[i].split("=");
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if(nameValue.length == 2){
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String param = nameValue[0].toUpperCase(); |
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if (param.equals("CRS")){
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dataStoreParameters.setDynValue(FIELD_SRSSTR, nameValue[1]); |
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}else if (param.equals("FORMAT")){
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dataStoreParameters.setDynValue(FIELD_FORMAT, nameValue[1]); |
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}else if (param.equals("WIDTH")){
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dataStoreParameters.setDynValue(FIELD_WIDTH, nameValue[1]); |
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}else if (param.equals("HEIGHT")){
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dataStoreParameters.setDynValue(FIELD_HEIGHT, nameValue[1]); |
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}else if (param.equals("BANDS")){
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dataStoreParameters.setDynValue(FIELD_PARAM, nameValue[1]); |
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} |
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} |
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} |
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} |
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} |
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protected String getErrorMessage() {
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return Messages.getText("wcsError") + ".\n" +
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Messages.getText("link") + ": " +
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getResource().getLinkage(); |
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} |
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protected String getWindowMessage() {
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return Messages.getText("wcsLoad");
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} |
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} |
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