org.odlabs.wiquery.core.commons.merge.WiQueryMergedJavaScriptResourceReference.java Source code

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Here is the source code for org.odlabs.wiquery.core.commons.merge.WiQueryMergedJavaScriptResourceReference.java

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/*
 * Copyright (c) 2009 WiQuery team
 * 
 * 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.
 */
package org.odlabs.wiquery.core.commons.merge;

import java.util.HashMap;
import java.util.Map;

import org.apache.wicket.Application;
import org.apache.wicket.IClusterable;
import org.apache.wicket.Resource;
import org.apache.wicket.ResourceReference;
import org.apache.wicket.javascript.IJavascriptCompressor;
import org.apache.wicket.markup.html.resources.JavascriptResourceReference;
import org.apache.wicket.util.io.Streams;
import org.apache.wicket.util.lang.Packages;
import org.apache.wicket.util.resource.IResourceStream;
import org.apache.wicket.util.resource.StringResourceStream;
import org.apache.wicket.util.template.PackagedTextTemplate;
import org.apache.wicket.util.time.Time;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * $Id: WiQueryMergedJavaScriptResourceReference.java 1010 2011-05-13 15:22:25Z hielke.hoeve@gmail.com $
 * 
 * <p>
 * Merged many {@link JavascriptResourceReference} into one {@link IResourceStream}
 * </p>
 * 
 * @author Julien Roche
 * @since 1.1
 *
 */
public class WiQueryMergedJavaScriptResourceReference extends ResourceReference implements IClusterable {
    // Constants
    /**   Constant of serialization */
    private static final long serialVersionUID = 6038498199511603297L;

    /** Name of the template for our ResourceReference */
    private static final String TEMPLATE_NAME = "wiquery-merged.js";

    /** Content-type */
    private static final String CONTENT_TYPE = "text/javascript";

    /** Logger */
    private static final Logger LOGGER = LoggerFactory.getLogger(WiQueryMergedJavaScriptResourceReference.class);

    // Properties
    private PackagedTextTemplate jstemplate;
    private WiQueryHeaderResponse wiQueryHeaderResponse;

    /**
     * Default constructor
     */
    public WiQueryMergedJavaScriptResourceReference(WiQueryHeaderResponse wiQueryHeaderResponse) {
        super(WiQueryMergedJavaScriptResourceReference.class, TEMPLATE_NAME + "_"
                + WiQueryHeaderResponse.getMergedResourceName(wiQueryHeaderResponse.getJavascript()));

        this.wiQueryHeaderResponse = wiQueryHeaderResponse;
        jstemplate = new PackagedTextTemplate(WiQueryMergedJavaScriptResourceReference.class, TEMPLATE_NAME);
    }

    /**
     * Returns the last modified time of the {@link PackagedTextTemplate}
     * itself.
     * 
     * @return the last modified time of the {@link PackagedTextTemplate} itself
     */
    public Time lastModifiedTime() {
        return jstemplate.lastModifiedTime();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected Resource newResource() {
        return new Resource() {
            private static final long serialVersionUID = 1L;

            /**
             * {@inheritDoc}
             */
            public IResourceStream getResourceStream() {
                String temp = null;
                Application application = Application.get();
                StringBuffer buffer = new StringBuffer();
                IJavascriptCompressor compressor = application.getResourceSettings().getJavascriptCompressor();

                for (ResourceReference ref : wiQueryHeaderResponse.getJavascript()) {
                    // We bind the resources into the SharedResources
                    ref.bind(Application.get());

                    // We insert the javascript code into the template
                    try {
                        IResourceStream resource = Application.get().getResourceSettings()
                                .getResourceStreamLocator().locate(getClass(),
                                        "/" + Packages.absolutePath(ref.getScope(), "") + "/" + ref.getName());
                        if (resource != null)
                            temp = Streams.readString(resource.getInputStream());
                    } catch (Exception e) {
                        temp = null;
                        e.printStackTrace();
                        LOGGER.error("error in merged processing", e);
                    }

                    if (compressor != null && temp != null) {
                        temp = compressor.compress(temp);
                    }

                    if (temp != null) {
                        buffer.append(temp).append("\r\n");
                    }
                }

                Map<String, Object> genJs = new HashMap<String, Object>();
                genJs.put("wiqueryresources", buffer);
                jstemplate.interpolate(genJs);

                return new StringResourceStream(jstemplate.asString(), CONTENT_TYPE);
            }
        };
    }
}