com.data2semantics.yasgui.client.tab.optionbar.endpoints.EndpointDataSource.java Source code

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Here is the source code for com.data2semantics.yasgui.client.tab.optionbar.endpoints.EndpointDataSource.java

Source

package com.data2semantics.yasgui.client.tab.optionbar.endpoints;

/*
 * #%L
 * YASGUI
 * %%
 * Copyright (C) 2013 Laurens Rietveld
 * %%
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * #L%
 */

import java.util.ArrayList;
import java.util.Set;

import com.data2semantics.yasgui.client.View;
import com.data2semantics.yasgui.shared.Endpoints;
import com.google.gwt.json.client.JSONArray;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.json.client.JSONParser;
import com.google.gwt.json.client.JSONString;
import com.google.gwt.json.client.JSONValue;
import com.smartgwt.client.data.DataSource;
import com.smartgwt.client.data.Record;
import com.smartgwt.client.data.fields.DataSourceTextField;
import com.smartgwt.client.widgets.grid.ListGridRecord;

public class EndpointDataSource extends DataSource {
    /**
     * Implemented as client-only datasource. 
     * Datasource supports dynamic fetching from server, but the results we are dealing with are not that large
     * Additionally, this would require multiple sparql queries being executed where one would suffice
     */

    @SuppressWarnings("unused")
    private View view;
    private ArrayList<ListGridRecord> records = new ArrayList<ListGridRecord>();

    public EndpointDataSource(View view) {
        this.view = view;
        DataSourceTextField endpointUri = new DataSourceTextField(Endpoints.KEY_ENDPOINT, "User ID");
        DataSourceTextField description = new DataSourceTextField(Endpoints.KEY_DESCRIPTION, "User ID");
        DataSourceTextField title = new DataSourceTextField(Endpoints.KEY_TITLE, "User ID");
        setFields(endpointUri, description, title);

        //init with empty record
        ListGridRecord record = new ListGridRecord();
        setCacheData(record);

        setCacheAllData(true);
        setClientOnly(true);
    }

    public EndpointDataSource(View view, Record[] records) {
        this(view);
        setCacheData(records);
    }

    public void addEndpointsFromJson(String jsonString) throws Exception {
        JSONValue jsonVal = JSONParser.parseStrict(jsonString);
        if (jsonVal != null) {
            JSONArray endpoints = jsonVal.isArray();
            if (endpoints != null) {
                for (int i = 0; i < endpoints.size(); i++) {
                    JSONValue endpointVal = endpoints.get(i);
                    if (endpointVal != null) {
                        JSONObject endpoint = endpointVal.isObject();
                        if (endpoint != null) {
                            addEndpointFromJson(endpoint);
                        }
                    }
                }
            }
        }
        setCacheData(records.toArray(new ListGridRecord[records.size()]));
    }

    private void addEndpointFromJson(JSONObject endpoint) throws Exception {
        ListGridRecord record = new ListGridRecord();
        Set<String> keys = endpoint.keySet();
        for (String key : keys) {
            JSONValue value = endpoint.get(key);
            if (value != null) {
                JSONString stringJsonVal = value.isString();
                if (stringJsonVal != null) {
                    record.setAttribute(key, stringJsonVal.stringValue());
                }
            }
        }

        records.add(record);
    }
}