datadatastoreseditoraction.java

电子地图服务器,搭建自己的地图服务

/* Copyright (c) 2001 - 2007 TOPP - www.openplans.org.  All rights reserved.
 * This code is licensed under the GPL 2.0 license, availible at the root
 * application directory.
 */
package org.vfny.geoserver.action.data;

import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.geotools.data.DataStore;
import org.geotools.data.DataStoreFactorySpi;
import org.geotools.data.DataStoreFactorySpi.Param;
import org.geotools.feature.FeatureType;
import org.vfny.geoserver.action.ConfigAction;
import org.vfny.geoserver.config.DataConfig;
import org.vfny.geoserver.config.DataStoreConfig;
import org.vfny.geoserver.config.FeatureTypeConfig;
import org.vfny.geoserver.form.data.DataDataStoresEditorForm;
import org.vfny.geoserver.global.UserContainer;
import org.vfny.geoserver.util.DataStoreUtils;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.logging.Level;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


/**
 * DOCUMENT ME!
 *
 * @author rgould To change the template for this generated type comment go to
 *         Window>Preferences>Java>Code Generation>Code and Comments
 */
public class DataDataStoresEditorAction extends ConfigAction {
    public ActionForward execute(ActionMapping mapping, ActionForm form, UserContainer user,
        HttpServletRequest request, HttpServletResponse response)
        throws IOException, ServletException {
        DataDataStoresEditorForm dataStoresForm = (DataDataStoresEditorForm) form;

        String dataStoreID = dataStoresForm.getDataStoreId();
        String namespace = dataStoresForm.getNamespaceId();
        String description = dataStoresForm.getDescription();

        DataConfig dataConfig = (DataConfig) getDataConfig();
        DataStoreConfig config = null;

        config = (DataStoreConfig) dataConfig.getDataStore(dataStoreID);

        boolean isNewDataStore = false;

        if (config == null) {
            // we are creating a new one.
            dataConfig.addDataStore(getUserContainer(request).getDataStoreConfig());
            config = (DataStoreConfig) dataConfig.getDataStore(dataStoreID);
            isNewDataStore = true;
        }

        // After extracting params into a map
        Map connectionParams = new HashMap(); // values used for connection
        Map paramTexts = new HashMap(); // values as stored

        Map params = dataStoresForm.getParams();

        DataStoreFactorySpi factory = config.getFactory();
        Param[] info = factory.getParametersInfo();

        // Convert Params into the kind of Map we actually need
        //
        for (Iterator i = params.keySet().iterator(); i.hasNext();) {
            String key = (String) i.next();

            Param param = DataStoreUtils.find(info, key);

            if (param == null) {
                ActionErrors errors = new ActionErrors();
                errors.add(ActionErrors.GLOBAL_ERROR,
                    new ActionError("error.cannotProcessConnectionParams"));
                saveErrors(request, errors);

                return mapping.findForward("config.data.store.editor");
            }

            Object value;

            try {
                value = param.lookUp(params);
            } catch (IOException erp) {
                ActionErrors errors = new ActionErrors();
                errors.add(ActionErrors.GLOBAL_ERROR,
                    new ActionError("error.cannotProcessConnectionParams"));
                saveErrors(request, errors);

                return mapping.findForward("config.data.store.editor");
            }

            if ((value != null) && !"".equals(value)) {
                connectionParams.put(key, value);

                String text = param.text(value);
                paramTexts.put(key, text);
            }
        }

        // put magic namespace into the mix
        // not sure if we want to do this, as we want the full namespace, not
        //the id.  But getParams in DataStore may override this - ch
        connectionParams.put("namespace", dataStoresForm.getNamespaceId());
        paramTexts.put("namespace", dataStoresForm.getNamespaceId());

        //dump("editor", connectionParams );
        //dump("texts ",paramTexts );        
        if (!factory.canProcess(connectionParams)) {
            // We could not use these params!
            //
            ActionErrors errors = new ActionErrors();
            errors.add(ActionErrors.GLOBAL_ERROR,
                new ActionError("error.cannotProcessConnectionParams"));
            saveErrors(request, errors);

            return mapping.findForward("config.data.store.editor");
        }

        FeatureType singleFeatureType = null;

        DataStore victim = null;
        try {
            ServletContext sc = request.getSession().getServletContext();
            victim = DataStoreUtils.acquireDataStore(paramTexts, sc);

            if (victim == null) {
                // We *really* could not use these params!
                //
                ActionErrors errors = new ActionErrors();
                errors.add(ActionErrors.GLOBAL_ERROR,
                    new ActionError("error.invalidConnectionParams"));
                saveErrors(request, errors);

                return mapping.findForward("config.data.store.editor");
            }

            String[] typeNames = victim.getTypeNames();

            //If there's only one featureType in the datastore, then we
            //want to be nice to users and pass them directly to the editor,
            //so we need to get the featureType here.
            if (typeNames.length == 1) {
                singleFeatureType = victim.getSchema(typeNames[0]);
            }

            dump("typeNames", typeNames);
        } catch (Throwable throwable) {
            LOGGER.log(Level.WARNING,
                "Unable to fetch a list of FeatureType names from datastore.", throwable);

            ActionErrors errors = new ActionErrors();
            errors.add(ActionErrors.GLOBAL_ERROR,
                new ActionError("error.exception", throwable.getMessage()));

            saveErrors(request, errors);

            return mapping.findForward("config.data.store.editor");
        } finally {
            if(victim != null) victim.dispose();
        }

        boolean enabled = dataStoresForm.isEnabled();

        if (dataStoresForm.isEnabledChecked() == false) {
            enabled = false;
        }

        config.setEnabled(enabled);
        config.setNameSpaceId(namespace);
        config.setAbstract(description);
        config.setConnectionParams(paramTexts);

        dataConfig.addDataStore(config);

        getUserContainer(request).setDataStoreConfig(null);
        getApplicationState().notifyConfigChanged();

        if ((singleFeatureType == null) || !isNewDataStore) {
            //If there are many featureTypes, then just forward to the normal
            //spot.
            return mapping.findForward("config.data.store");
        } else {
            //We only have one featureType, and this is the creation of a new datastore
            //so we should forward to the editor of this featureType, since this is what 
            //users will be next in the vast majority of the cases.
            FeatureTypeConfig ftConfig = new FeatureTypeConfig(dataStoreID, singleFeatureType, false);

            request.getSession().setAttribute(DataConfig.SELECTED_FEATURE_TYPE, ftConfig);
            request.getSession().removeAttribute(DataConfig.SELECTED_ATTRIBUTE_TYPE);

            user.setFeatureTypeConfig(ftConfig);

            return mapping.findForward("config.data.type.editor");
        }
    }

    /** Used to debug connection parameters */
    public void dump(String msg, Map params) {
        if (msg != null) {
            System.out.print(msg + " ");
        }

        System.out.print(": { ");

        for (Iterator i = params.entrySet().iterator(); i.hasNext();) {
            Map.Entry entry = (Map.Entry) i.next();
            System.out.print(entry.getKey());
            System.out.print("=");
            dump(entry.getValue());

            if (i.hasNext()) {
                System.out.print(", ");
            }
        }

        System.out.println("}");
    }

    public void dump(Object obj) {
        if (obj == null) {
            System.out.print("null");
        } else if (obj instanceof String) {
            System.out.print("\"");
            System.out.print(obj);
            System.out.print("\"");
        } else {
            System.out.print(obj);
        }
    }

    public void dump(String msg, Object[] array) {
        if (msg != null) {
            System.out.print(msg + " ");
        }

        System.out.print(": ");

        if (array == null) {
            System.out.print("null");

            return;
        }

        System.out.print("(");

        for (int i = 0; i < array.length; i++) {
            dump(array[i]);

            if (i < (array.length - 1)) {
                System.out.print(", ");
            }
        }

        System.out.println(")");
    }
}