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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: ResourceResolver.java 1732018 2016-02-24 04:51:06Z gadams $ */

package org.apache.xmlgraphics.io;

import java.io.IOException;
import java.io.OutputStream;
import java.net.URI;

/**
 * Implementations of this resource resolver allow XGC users to control the URI resolution
 * mechanism. All resource and output stream acquisition goes through this when its implementation
 * is given to the org.apache.fop.apps.EnvironmentProfile.
 */
public interface ResourceResolver {

    /**
     * Get a resource given the URI pointing to said resource.
     *
     * @param uri the resource URI
     * @return the resource
     * @throws IOException if an I/O error occured during resource acquisition
     */
    Resource getResource(URI uri) throws IOException;

    /**
     * Gets an output stream of a given URI.
     *
     * @param uri the output stream URI
     * @return the output stream
     * @throws IOException if an I/O error occured while creating an output stream
     */
    OutputStream getOutputStream(URI uri) throws IOException;

}