org.apache.xmlgraphics.io.URIResolverAdapter Maven / Gradle / Ivy
/*
* 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.
*/
package org.apache.xmlgraphics.io;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;
import java.net.URL;
import javax.xml.transform.Source;
import javax.xml.transform.TransformerException;
import javax.xml.transform.URIResolver;
/**
* An adapter between {@link URIResolver} to {@link ResourceResolver}. This adapter allows users
* to utilize the resolvers from the XML library for resource acquisition.
*/
public class URIResolverAdapter implements ResourceResolver {
private final URIResolver resolver;
/**
* @param resolver the desired {@link URIResolver}
*/
public URIResolverAdapter(URIResolver resolver) {
this.resolver = resolver;
}
/** {@inheritDoc} */
public Resource getResource(URI uri) throws IOException {
try {
Source src = resolver.resolve(uri.toASCIIString(), null);
InputStream resourceStream = XmlSourceUtil.getInputStream(src);
if (resourceStream == null) {
URL url = new URL(src.getSystemId());
resourceStream = url.openStream();
}
return new Resource(resourceStream);
} catch (TransformerException e) {
throw new IOException(e.getMessage());
}
}
/** {@inheritDoc} */
public OutputStream getOutputStream(URI uri) throws IOException {
try {
Source src = resolver.resolve(uri.toASCIIString(), null);
return new URL(src.getSystemId()).openConnection().getOutputStream();
} catch (TransformerException te) {
throw new IOException(te.getMessage());
}
}
}