org.apache.wicket.markup.head.JavaScriptUrlReferenceHeaderItem.java Source code

Introduction

Here is the source code for org.apache.wicket.markup.head.JavaScriptUrlReferenceHeaderItem.java

Source

/*
 * 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 org.apache.wicket.markup.head;

import java.util.Arrays;
import java.util.Collections;
import java.util.Objects;

import org.apache.wicket.request.Response;
import org.apache.wicket.request.UrlUtils;
import org.apache.wicket.request.cycle.RequestCycle;
import org.apache.wicket.util.string.Strings;

/**
 * {@link HeaderItem} for script tags that are rendered using a fixed URL, for example resources
 * from an external site or context relative urls.
 * 
 * @author papegaaij
 */
public class JavaScriptUrlReferenceHeaderItem extends AbstractJavaScriptReferenceHeaderItem {
    private final String url;

    /**
     * Creates a new {@code JavaScriptUrlReferenceHeaderItem}.
     * 
     * @param url
     *            context-relative url of the the javascript resource
     * @param id
     *            id that will be used to filter duplicate reference (it's still filtered by URL
     *            too)
     * @param defer
     *            specifies that the execution of a script should be deferred (delayed) until after
     *            the page has been loaded.
     * @param charset
     *            a non null value specifies the charset attribute of the script tag
     * @param condition
     *            the condition to use for Internet Explorer conditional comments. E.g. "IE 7".
     */
    public JavaScriptUrlReferenceHeaderItem(String url, String id, boolean defer, String charset,
            String condition) {
        super(condition, defer, charset);
        this.url = url;
        setId(id);
    }

    /**
     * @return context-relative url of the the javascript resource
     */
    public String getUrl() {
        return url;
    }

    @Override
    public void render(Response response) {
        internalRenderJavaScriptReference(response, UrlUtils.rewriteToContextRelative(getUrl(), RequestCycle.get()),
                getId(), isDefer(), getCharset(), getCondition(), isAsync());
    }

    @Override
    public Iterable<?> getRenderTokens() {
        String url = UrlUtils.rewriteToContextRelative(getUrl(), RequestCycle.get());
        if (Strings.isEmpty(getId()))
            return Collections.singletonList("javascript-" + url);
        else
            return Arrays.asList("javascript-" + getId(), "javascript-" + url);
    }

    @Override
    public String toString() {
        return "JavaScriptUrlReferenceHeaderItem(" + getUrl() + ")";
    }

    @Override
    public boolean equals(Object o) {
        if (this == o)
            return true;
        if (o == null || getClass() != o.getClass())
            return false;
        if (!super.equals(o))
            return false;
        JavaScriptUrlReferenceHeaderItem that = (JavaScriptUrlReferenceHeaderItem) o;
        return Objects.equals(url, that.url);
    }

    @Override
    public int hashCode() {
        return Objects.hash(super.hashCode(), url);
    }
}