org.wicketstuff.mergedresources.util.MergedHeaderContributor.java Source code

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Here is the source code for org.wicketstuff.mergedresources.util.MergedHeaderContributor.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 org.wicketstuff.mergedresources.util;

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

import org.apache.wicket.ResourceReference;
import org.apache.wicket.behavior.AbstractHeaderContributor;
import org.apache.wicket.markup.html.IHeaderContributor;
import org.apache.wicket.markup.html.IHeaderResponse;
import org.apache.wicket.util.string.Strings;

public class MergedHeaderContributor extends AbstractHeaderContributor {
    private static final long serialVersionUID = 1L;
    public IHeaderContributor _contributor;
    private ArrayList<ResourceReference> _refs;
    private String _cssMediaType;

    public MergedHeaderContributor(final List<ResourceReference> refs) {
        this(refs, null);
    }

    public MergedHeaderContributor(List<ResourceReference> refs, String cssMediaType) {
        _refs = new ArrayList<ResourceReference>(refs);
        _cssMediaType = cssMediaType;
        _contributor = new IHeaderContributor() {

            private static final long serialVersionUID = 1L;

            public void renderHead(final IHeaderResponse response) {
                for (final ResourceReference ref : _refs) {
                    final String name = ref.getName();
                    if (name != null) {
                        if (name.endsWith(".js")) {
                            response.renderJavascriptReference(ref);
                        } else if (name.endsWith(".css")) {
                            if (Strings.isEmpty(_cssMediaType)) {
                                response.renderCSSReference(ref);
                            } else {
                                response.renderCSSReference(ref, _cssMediaType);
                            }
                        }
                    }
                }
            }
        };
    }

    @Override
    public IHeaderContributor[] getHeaderContributors() {
        return new IHeaderContributor[] { _contributor };
    }
}