com.googlecode.wicket.kendo.ui.scheduler.SchedulerModelBehavior.java Source code

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Here is the source code for com.googlecode.wicket.kendo.ui.scheduler.SchedulerModelBehavior.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 com.googlecode.wicket.kendo.ui.scheduler;

import java.util.List;

import org.apache.wicket.Application;
import org.apache.wicket.behavior.AbstractAjaxBehavior;
import org.apache.wicket.request.IRequestCycle;
import org.apache.wicket.request.IRequestHandler;
import org.apache.wicket.request.IRequestParameters;
import org.apache.wicket.request.cycle.RequestCycle;
import org.apache.wicket.request.http.WebResponse;
import org.apache.wicket.util.lang.Args;

/**
 * Provides the behavior that loads {@link SchedulerEvent}{@code s} according to {@link SchedulerModel} start & end dates
 *
 * @author Sebastien Briquet - sebfz1
 *
 */
public class SchedulerModelBehavior extends AbstractAjaxBehavior {
    private static final long serialVersionUID = 1L;

    private final SchedulerModel model;
    private final SchedulerEventFactory factory;

    /**
     * Constructor
     *
     * @param model the {@link SchedulerModel}
     */
    public SchedulerModelBehavior(final SchedulerModel model, SchedulerEventFactory factory) {
        this.model = model;
        this.factory = Args.notNull(factory, "factory");
    }

    @Override
    public void onRequest() {
        final RequestCycle requestCycle = RequestCycle.get();
        IRequestParameters parameters = requestCycle.getRequest().getQueryParameters();

        final long start = parameters.getParameterValue("start").toLong(0);
        final long end = parameters.getParameterValue("end").toLong(0);

        if (this.model != null) {
            this.setStartDate(this.model, start);
            this.setEndDate(this.model, end);
        }

        requestCycle.scheduleRequestHandlerAfterCurrent(this.newRequestHandler());
    }

    /**
     * Sets the start date to the model<br/>
     * This can be overridden to perform additional operation on date before the assignment.
     *
     * @param model the {@link SchedulerModel}
     * @param date the timestamp
     */
    protected void setStartDate(SchedulerModel model, long date) {
        model.setStart(date);
    }

    /**
     * Sets the end date to the model<br/>
     * This can be overridden to perform additional operation on date before the assignment.
     *
     * @param model the {@link SchedulerModel}
     * @param date the timestamp
     */
    protected void setEndDate(SchedulerModel model, long date) {
        model.setEnd(date);
    }

    /**
     * Gets the new {@link IRequestHandler} that will respond the list of {@link SchedulerEvent} in a JSON format
     *
     * @return the {@link IRequestHandler}
     */
    protected IRequestHandler newRequestHandler() {
        return new SchedulerModelRequestHandler();
    }

    /**
     * Provides the {@link IRequestHandler}
     */
    protected class SchedulerModelRequestHandler implements IRequestHandler {
        @Override
        public void respond(final IRequestCycle requestCycle) {
            WebResponse response = (WebResponse) requestCycle.getResponse();

            final String encoding = Application.get().getRequestCycleSettings().getResponseRequestEncoding();
            response.setContentType("text/json; charset=" + encoding);
            response.disableCaching();

            if (model != null) {
                List<SchedulerEvent> list = model.getObject(); // calls load()

                if (list != null) {
                    StringBuilder builder = new StringBuilder("[ ");

                    int count = 0;
                    for (SchedulerEvent event : list) {
                        if (model instanceof ISchedulerVisitor) {
                            event.accept((ISchedulerVisitor) model); // last chance to set options
                        }

                        if (event.isVisible()) {
                            if (count++ > 0) {
                                builder.append(", ");
                            }

                            builder.append(factory.toJson(event));
                        }
                    }

                    response.write(builder.append(" ]"));
                }
            }
        }

        @Override
        public void detach(final IRequestCycle requestCycle) {
            model.detach();
        }
    }
}