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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.
- */
-
- /* $Id$ */
-
- package org.apache.fop.image;
-
- // FOP
- import org.apache.fop.apps.FOUserAgent;
-
- /**
- * Image cache holder.
- * This interface is used for caching images.
- */
- public interface ImageCache {
-
- /**
- * Get an image from the cache.
- *
- * @param url the url and key for the image
- * @param context the user agent context
- * @return the requested image
- */
- FopImage getImage(String url, FOUserAgent context);
-
- /**
- * Release an image in the current context.
- *
- * @param url the url and key for the image
- * @param context the user agent context
- */
- void releaseImage(String url, FOUserAgent context);
-
- /**
- * Invalidate image.
- * If during loading this image is found to be invalid
- * it will be invalidated to prevent further attempts at
- * loading the image.
- *
- * @param url the url and key for the image
- * @param context the user agent context
- */
- void invalidateImage(String url, FOUserAgent context);
-
- /**
- * Remove a context and handle all images in the context.
- *
- * @param context the user agent context
- */
- void removeContext(FOUserAgent context);
-
- /**
- * Forces the cache to fully cleared.
- */
- void clearAll();
-
- }
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