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Diffstat (limited to 'src/java/org/apache/fop/afp/util/AFPResourceAccessor.java')
-rw-r--r-- | src/java/org/apache/fop/afp/util/AFPResourceAccessor.java | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/src/java/org/apache/fop/afp/util/AFPResourceAccessor.java b/src/java/org/apache/fop/afp/util/AFPResourceAccessor.java new file mode 100644 index 000000000..4200e8d36 --- /dev/null +++ b/src/java/org/apache/fop/afp/util/AFPResourceAccessor.java @@ -0,0 +1,74 @@ +/* + * 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.fop.apps.io.URIResolverWrapper; + +/** + * Defines an interface through which external resource objects can be accessed. + */ +public final class AFPResourceAccessor { + + private final URIResolverWrapper resolver; + private final String baseURI; + + /** + * 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 org.apache.fop.fonts.FontManager}'s base URI instead of the one on the + * {@link org.apache.fop.apps.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 AFPResourceAccessor(URIResolverWrapper resolver, String baseURI) { + this.resolver = resolver; + this.baseURI = baseURI; + } + + public AFPResourceAccessor(URIResolverWrapper resolver) { + this.resolver = resolver; + this.baseURI = null; + } + + private URI getResourceURI(URI uri) { + if (baseURI == null) { + return uri; + } + try { + URI baseURI = URIResolverWrapper.getBaseURI(this.baseURI); + return baseURI.resolve(uri); + } catch (URISyntaxException use) { + return uri; + } + } + + /** {@inheritDoc} */ + public InputStream createInputStream(URI uri) throws IOException { + return resolver.resolveIn(getResourceURI(uri)); + } + +} |