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 * Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
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package javax.xml.transform;

/**
 * <p>An object that implements this interface that can be called by the processor
 * to turn a URI used in document(), xsl:import, or xsl:include into a Source object.
 *
 * @since 1.4
 */
public interface URIResolver {

    /**
     * Called by the processor when it encounters
     * an xsl:include, xsl:import, or document() function.
     *
     * @param href An href attribute, which may be relative or absolute.
     * @param base The base URI against which the first argument will be made
     * absolute if the absolute URI is required.
     *
     * @return A Source object, or null if the href cannot be resolved,
     * and the processor should try to resolve the URI itself.
     *
     * @throws TransformerException if an error occurs when trying to
     * resolve the URI.
     */
    public Source resolve(String href, String base)
        throws TransformerException;
}