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

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Here is the source code for org.apache.wicket.markup.head.PriorityHeaderItem.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 org.apache.wicket.markup.head;

import java.util.ArrayList;
import java.util.List;
import java.util.Objects;

import org.apache.wicket.request.Response;

/**
 * {@link HeaderItem} that has priority over other header items. {@code PriorityHeaderItem}s
 * rendered parent-first at the beginning of the header. Dependencies of a
 * {@code PriorityHeaderItem} also have priority.
 * 
 * @author papegaaij
 */
public class PriorityHeaderItem extends HeaderItem implements IWrappedHeaderItem {
    private HeaderItem wrapped;

    /**
     * Construct.
     * 
     * @param wrapped
     *            the actual {@link HeaderItem} that should have priority
     */
    public PriorityHeaderItem(HeaderItem wrapped) {
        this.wrapped = wrapped;
    }

    /**
     * @return the actual {@link HeaderItem}
     */
    @Override
    public HeaderItem getWrapped() {
        return wrapped;
    }

    @Override
    public PriorityHeaderItem wrap(HeaderItem item) {
        return new PriorityHeaderItem(item);
    }

    @Override
    public Iterable<?> getRenderTokens() {
        return getWrapped().getRenderTokens();
    }

    @Override
    public void render(Response response) {
        getWrapped().render(response);
    }

    @Override
    public List<HeaderItem> getDependencies() {
        List<PriorityHeaderItem> ret = new ArrayList<>();
        for (HeaderItem curDependency : getWrapped().getDependencies()) {
            ret.add(wrap(curDependency));
        }
        List<HeaderItem> dependencies = super.getDependencies();
        dependencies.addAll(ret);
        return dependencies;
    }

    @Override
    public Iterable<? extends HeaderItem> getProvidedResources() {
        return getWrapped().getProvidedResources();
    }

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

    @Override
    public int hashCode() {
        return Objects.hash(wrapped);
    }

    @Override
    public String toString() {
        return "PriorityHeaderItem(" + getWrapped() + ")";
    }
}