| /* |
| * 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.afp.util; |
| |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URI; |
| import java.net.URL; |
| |
| import javax.xml.transform.Source; |
| import javax.xml.transform.stream.StreamSource; |
| |
| import org.apache.commons.io.IOUtils; |
| |
| import org.apache.fop.apps.FOUserAgent; |
| import org.apache.fop.apps.FopFactory; |
| import org.apache.fop.fonts.FontManager; |
| |
| /** |
| * Default implementation of the {@link ResourceAccessor} interface for use inside FOP. |
| */ |
| public class DefaultFOPResourceAccessor extends SimpleResourceAccessor { |
| |
| private FOUserAgent userAgent; |
| private String categoryBaseURI; |
| |
| /** |
| * Constructor for resource to be accessed via the {@link FOUserAgent}. This contructor |
| * can take two base URIs: the category base URI is the one to use when differentiating between |
| * normal resources (ex. images) and font resources. So, if fonts need to be accessed, you can |
| * set the {@link FontManager}'s base URI instead of the one on the {@link FopFactory}. |
| * @param userAgent the FO user agent |
| * @param categoryBaseURI the category base URI (may be null) |
| * @param baseURI the custom base URI to resolve relative URIs against (may be null) |
| */ |
| public DefaultFOPResourceAccessor(FOUserAgent userAgent, String categoryBaseURI, URI baseURI) { |
| super(baseURI); |
| this.userAgent = userAgent; |
| this.categoryBaseURI = categoryBaseURI; |
| } |
| |
| /** {@inheritDoc} */ |
| public InputStream createInputStream(URI uri) throws IOException { |
| //Step 1: resolve against local base URI --> URI |
| URI resolved = resolveAgainstBase(uri); |
| |
| //Step 2: resolve against the user agent --> stream |
| String base = (this.categoryBaseURI != null |
| ? this.categoryBaseURI |
| : this.userAgent.getBaseURL()); |
| Source src = userAgent.resolveURI(resolved.toASCIIString(), base); |
| |
| if (src == null) { |
| throw new FileNotFoundException("Resource not found: " + uri.toASCIIString()); |
| } else if (src instanceof StreamSource) { |
| StreamSource ss = (StreamSource)src; |
| InputStream in = ss.getInputStream(); |
| if (in != null) { |
| return in; |
| } |
| if (ss.getReader() != null) { |
| //Don't support reader, retry using system ID below |
| IOUtils.closeQuietly(ss.getReader()); |
| } |
| } |
| URL url = new URL(src.getSystemId()); |
| return url.openStream(); |
| } |
| |
| } |