001    // Copyright 2010 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    // http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry5.internal.services.javascript;
016    
017    import java.util.List;
018    
019    import org.apache.tapestry5.SymbolConstants;
020    import org.apache.tapestry5.services.javascript.JavaScriptStack;
021    import org.apache.tapestry5.services.javascript.JavaScriptStackSource;
022    import org.apache.tapestry5.services.javascript.JavaScriptSupport;
023    
024    /**
025     * Used to generate a list of asset URL paths for the JavaScript libraries
026     * of a JavaScript stack. This encapsulates much of the logic of {@linkplain SymbolConstants#COMBINE_SCRIPTS script
027     * aggregation}.
028     * 
029     * @since 5.2.0
030     * @see JavaScriptStack
031     * @see JavaScriptStackSource
032     * @see JavaScriptSupport
033     */
034    public interface JavaScriptStackPathConstructor
035    {
036        /**
037         * Given a stack, by name, return a list of URL paths for the individual libraqries in the stack.
038         * If scripts are combined, this will be a single (combined) URL.
039         * 
040         * @param stackName
041         *            name of {@link JavaScriptStack}
042         */
043        List<String> constructPathsForJavaScriptStack(String stackName);
044    }