org.activiti.rest.builder.management.TableDataObjectBuilder.java Source code

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Here is the source code for org.activiti.rest.builder.management.TableDataObjectBuilder.java

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/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.activiti.rest.builder.management;

import java.lang.reflect.Array;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.activiti.engine.management.TablePage;
import org.activiti.rest.builder.BaseJSONObjectBuilder;
import org.activiti.rest.util.JSONUtil;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

/**
 * @author Frederik Heremans
 */
public class TableDataObjectBuilder extends BaseJSONObjectBuilder {

    @Override
    public JSONObject createJsonObject(Object modelObject) throws JSONException {
        Map<String, Object> model = getModelAsMap(modelObject);
        JSONObject result = new JSONObject();
        JSONUtil.putPagingInfo(result, model);

        JSONArray rows = JSONUtil.putNewArray(result, "data");
        TablePage tablePage = (TablePage) model.get("tablePage");
        if (tablePage != null) {
            for (Map<String, Object> row : tablePage.getRows()) {
                rows.put(createJSONObjectForRow(row));
            }
        }
        return result;
    }

    private JSONObject createJSONObjectForRow(Map<String, Object> row) throws JSONException {
        JSONObject json = new JSONObject();
        for (Entry<String, Object> column : row.entrySet()) {
            putColumnValue(json, column.getKey(), column.getValue());
        }
        return json;
    }

    protected void putColumnValue(JSONObject json, String key, Object value) throws JSONException {
        if (value == null) {
            JSONUtil.putRetainNull(json, key, null);
        } else if (value instanceof List<?>) {
            json.put(key, ((List<?>) value).size());
        } else if (value.getClass().isArray()) {
            json.put(key, Array.getLength(value));
        } else if (value instanceof Date) {
            String date = JSONUtil.formatISO8601Date((Date) value);
            JSONUtil.putRetainNull(json, key, date);
        } else {
            // All other types can be handled by JSONObject
            JSONUtil.putRetainNull(json, key, value);
        }
    }

}