123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130 |
- /*
- * 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.IOException;
- import java.io.InputStream;
- import java.net.URI;
- import java.net.URISyntaxException;
-
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import org.apache.fop.apps.io.InternalResourceResolver;
-
- /**
- * Defines an interface through which external resource objects can be accessed.
- */
- public final class AFPResourceAccessor {
-
- private static final Log log = LogFactory.getLog(AFPResourceAccessor.class);
-
- private final InternalResourceResolver resourceResolver;
- private final URI baseURI;
- private final URIResolver uriResolver;
-
- /**
- * Constructor for resource to be accessed via the {@link org.apache.fop.apps.FOUserAgent}. This
- * contructor takes a base URI for resolving font resource URIs. So, if fonts need to be
- * accessed, you can set the {@link org.apache.fop.fonts.FontManager}'s base URI instead of the
- * one on the {@link org.apache.fop.apps.FopFactory}.
- *
- * @param resourceResolver the resolver of resources
- * @param baseURI the custom base URI to resolve relative URIs against (may be null)
- */
- public AFPResourceAccessor(InternalResourceResolver resourceResolver, String baseURI) {
- this.resourceResolver = resourceResolver;
- URI actualBaseURI = null;
- URIResolver uriResolver;
- if (baseURI == null) {
- actualBaseURI = null;
- uriResolver = new NullBaseURIResolver();
- } else {
- try {
- actualBaseURI = InternalResourceResolver.getBaseURI(baseURI);
- uriResolver = new BaseURIResolver();
- } catch (URISyntaxException use) {
- log.error("The URI given \"" + baseURI + "\" is invalid: " + use.getMessage());
- actualBaseURI = null;
- uriResolver = new NullBaseURIResolver();
- }
- }
- this.baseURI = actualBaseURI;
- this.uriResolver = uriResolver;
- }
-
- /**
- * Constructor for resource to be accessed via the {@link org.apache.fop.apps.FOUserAgent}.
- *
- * @param resourceResolver the resolver of resources
- */
- public AFPResourceAccessor(InternalResourceResolver resourceResolver) {
- this(resourceResolver, null);
- }
-
- /**
- * Creates an {@link InputStream} given a URI.
- *
- * @param uri the URI of the InputStream
- * @return an InputStream
- * @throws IOException if an I/O error occurs while creating the InputStream.
- */
- public InputStream createInputStream(URI uri) throws IOException {
- return resourceResolver.getResource(uriResolver.resolveURI(uri));
- }
-
- /**
- * Returns the resolved URI, given the URI of a resource.
- *
- * @param uri the resource URI
- * @return the resolved URI
- */
- public URI resolveURI(String uri) {
- return uriResolver.resolveURI(uri);
- }
-
- private interface URIResolver {
- URI resolveURI(URI uri);
-
- URI resolveURI(String uri);
- }
-
- private static final class NullBaseURIResolver implements URIResolver {
-
- public URI resolveURI(URI uri) {
- return uri;
- }
-
- public URI resolveURI(String uri) {
- return URI.create("./" + uri.trim());
- }
- }
-
- private final class BaseURIResolver implements URIResolver {
-
- public URI resolveURI(URI uri) {
- return baseURI.resolve(uri);
- }
-
- public URI resolveURI(String uri) {
- return baseURI.resolve(uri.trim());
- }
- }
- }
|