// Copyright 2013 The Apache Software Foundation
//
// 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.apache.tapestry5.internal.webresources;
/**
* Controls caching for {@link ResourceTransformerFactory} in <em>development mode</em>. In production mode, caching at this
* level is not needed, because artifacts are also cached later in the pipeline. This caching is all about avoid unwanted
*/
public enum CacheMode
{
/**
* Cache the content on the file system, in the directory defined by {@link org.apache.tapestry5.webresources.WebResourcesSymbols#CACHE_DIR}.
* This allows compilation to be avoided even after a restart, as long as the source file has not changed. This only works
* for compilations that operate on a single file (such as CoffeeScript, but not Less, which has an {@code @import} statement).
*/
SINGLE_FILE,
/**
* The source may be multiple files (e.g., Less). Cache in memory, and invalidate the cache if any of the multiple
* file's content changes.
*/
MULTIPLE_FILE,
/**
* Do no caching. This is appropriate for extremely cheap compilers.
*/
NONE;
}