de.inren.frontend.jqplot.JqplotPanel.java Source code

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Here is the source code for de.inren.frontend.jqplot.JqplotPanel.java

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/**
 * Copyright 2014 the original author or authors.
 *
 * 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 de.inren.frontend.jqplot;

import java.io.IOException;
import java.util.Scanner;

import org.apache.wicket.Component;
import org.apache.wicket.behavior.AttributeAppender;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.markup.head.CssHeaderItem;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.markup.head.JavaScriptHeaderItem;
import org.apache.wicket.markup.head.OnDomReadyHeaderItem;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.Model;
import org.apache.wicket.request.resource.CssResourceReference;
import org.apache.wicket.request.resource.JavaScriptResourceReference;
import org.apache.wicket.util.resource.IResourceStream;
import org.apache.wicket.util.resource.ResourceStreamNotFoundException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Ingo Renner
 *
 */
public class JqplotPanel extends Panel {

    private static Logger log = LoggerFactory.getLogger(JqplotPanel.class);

    public JqplotPanel(String id, IModel<IJqplotDefinition> model) {
        super(id, model);
    }

    @Override
    protected void onInitialize() {
        super.onInitialize();

        add(getJqplotBehavior());
        add(new AttributeAppender("class", Model.of("jqplot-target")));
    }

    private IJqplotDefinition getIJqplotDefinition() {
        return (IJqplotDefinition) getDefaultModelObject();
    }

    private String createJquery() {

        StringBuilder builder = new StringBuilder();
        builder.append("$.jqplot('").append(getMarkupId()).append("', ");
        builder.append(getIJqplotDefinition().getPlotData());
        builder.append(", ");
        builder.append(getIJqplotDefinition().getPlotConfiguration());
        builder.append(");\r\n");

        return builder.toString();
    }

    private Behavior getJqplotBehavior() {
        return new Behavior() {

            @Override
            public void renderHead(Component component, IHeaderResponse response) {
                super.renderHead(component, response);

                response.render(JavaScriptHeaderItem.forReference(
                        new JavaScriptResourceReference(JqplotPanel.class, "jquery.jqplot/jquery.jqplot.min.js")));
                response.render(CssHeaderItem.forReference(
                        new CssResourceReference(JqplotPanel.class, "jquery.jqplot/jquery.jqplot.min.css")));
                for (String resource : getIJqplotDefinition().getAdditionalResources()) {
                    response.render(JavaScriptHeaderItem
                            .forReference(new JavaScriptResourceReference(JqplotPanel.class, resource)));
                }

                response.render(OnDomReadyHeaderItem.forScript(createJquery()));

                final JavaScriptResourceReference jsr = new JavaScriptResourceReference(JqplotPanel.class,
                        "JqplotPanel.js");
                jsr.getResource().setCompress(true);
                IResourceStream is = jsr.getResource().getResourceStream();
                final String jqplotPanel_js = convertStreamToString(is);
                if (jqplotPanel_js != null) {
                    response.render(OnDomReadyHeaderItem.forScript(jqplotPanel_js));
                } else {
                    log.error("Could not read JqplotPanel.js");
                }
            }

        };
    }

    public static String convertStreamToString(IResourceStream is) {
        String res = null;
        try {
            @SuppressWarnings("resource")
            Scanner s = new Scanner(is.getInputStream(), "UTF-8").useDelimiter("\\A");
            res = s.hasNext() ? s.next() : null;
            is.close();
        } catch (ResourceStreamNotFoundException e) {
            log.error(e.getMessage(), e);
            res = null;
        } catch (IOException e) {
            log.error(e.getMessage(), e);
            res = null;
        }
        return res;
    }
}