at.molindo.wicketutils.migration.AbstractHeaderContributor.java Source code

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Here is the source code for at.molindo.wicketutils.migration.AbstractHeaderContributor.java

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/**
 * Copyright 2010 Molindo GmbH
 *
 * 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 at.molindo.wicketutils.migration;

import org.apache.wicket.Component;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.markup.html.IHeaderContributor;

/**
 * This class is meant for easy migration only. Don't use it for new classes
 */
public abstract class AbstractHeaderContributor extends Behavior {

    private static final long serialVersionUID = 1L;

    @Override
    public final void renderHead(Component component, IHeaderResponse response) {
        IHeaderContributor[] contributors = getHeaderContributors();
        // do nothing if we don't need to
        if (contributors == null) {
            return;
        }

        for (int i = 0; i < contributors.length; i++) {
            if (response.wasRendered(contributors[i]) == false) {
                contributors[i].renderHead(response);
                response.markRendered(contributors[i]);
            }
        }
    }

    public abstract IHeaderContributor[] getHeaderContributors();
}