org.apache.wicket.markup.DefaultMarkupCacheKeyProvider.java Source code

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

import java.util.Locale;

import org.apache.wicket.MarkupContainer;

/**
 * Wicket default implementation for the cache key used to reference the cached markup resource
 * stream.
 * 
 * @author Jonathan Locke
 * @author Juergen Donnerstag
 */
public class DefaultMarkupCacheKeyProvider implements IMarkupCacheKeyProvider {
    /**
     * Constructor.
     */
    public DefaultMarkupCacheKeyProvider() {
    }

    /**
     * Construct a proper key value for the cache
     * 
     * @param container
     *            The container requesting the markup
     * @param clazz
     *            The clazz to get the key for
     * @return Key that uniquely identifies any markup that might be associated with this markup
     *         container.
     */
    @Override
    public String getCacheKey(final MarkupContainer container, final Class<?> clazz) {
        final String classname = clazz.getName();
        final StringBuilder buffer = new StringBuilder(classname.length() + 64);
        buffer.append(classname);

        final String variation = container.getVariation();
        if (variation != null) {
            buffer.append('_').append(variation);
        }

        final String style = container.getStyle();
        if (style != null) {
            buffer.append('_').append(style);
        }

        final Locale locale = container.getLocale();
        if (locale != null) {
            buffer.append('_').append(locale.toString());
        }

        buffer.append('.').append(container.getMarkupType().getExtension());
        return buffer.toString();
    }
}