BricketDomReadyJavascriptBehaviour.java

/**
 * Copyright 2011 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 org.bricket.web;

import java.io.IOException;
import java.util.Map;

import org.apache.wicket.behavior.AbstractBehavior;
import org.apache.wicket.markup.html.IHeaderResponse;
import org.apache.wicket.util.io.Streams;
import org.apache.wicket.util.string.interpolator.MapVariableInterpolator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Ingo Renner
 * @author Henning Teek
 */
public class BricketDomReadyJavascriptBehaviour extends AbstractBehavior {
    private final Logger log = LoggerFactory.getLogger(BricketDomReadyJavascriptBehaviour.class);

    private Class<?> clazz;
    private String filename;
    private Map<String, Object> vars;

    public BricketDomReadyJavascriptBehaviour(Class<?> clazz, String filename, Map<String, Object> vars) {
        this.clazz = clazz;
        this.filename = filename;
        this.vars = vars;
    }

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

        String script;
        try {
            script = Streams.readString(clazz.getResourceAsStream(filename));
        } catch (IOException e) {
            log.error("error reading script for dom ready event.", e);
            script = "";
        }

        response.renderOnDomReadyJavascript(new MapVariableInterpolator(script, vars).toString());
    }
}