| /* |
| * 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.ode.bpel.elang; |
| |
| import java.io.InputStream; |
| import java.io.StringReader; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.net.URL; |
| |
| import javax.xml.transform.Source; |
| import javax.xml.transform.TransformerException; |
| import javax.xml.transform.URIResolver; |
| import javax.xml.transform.stream.StreamSource; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.apache.ode.bpel.elang.xpath10.obj.OXPath10Expression; |
| import org.apache.ode.bpel.obj.OXslSheet; |
| import org.apache.ode.utils.StreamUtils; |
| import org.apache.ode.utils.fs.FileUtils; |
| |
| /** |
| * Used to give the Xsl processor a way to access included XSL sheets |
| * by using the maps of sheets pre-processed at compilation time and |
| * stored in the OXPath10Expression. |
| */ |
| public class XslRuntimeUriResolver implements URIResolver { |
| |
| private static final Logger __log = LoggerFactory.getLogger(XslRuntimeUriResolver.class); |
| |
| private OXPath10Expression _expr; |
| private final URI _baseResourceURI; |
| |
| public XslRuntimeUriResolver(OXPath10Expression expr, URI baseResourceURI) { |
| _expr = expr; |
| _baseResourceURI= baseResourceURI; |
| } |
| |
| public Source resolve(String href, String base) throws TransformerException { |
| URI uri; |
| try { |
| uri = new URI(FileUtils.encodePath(href)); |
| } catch (URISyntaxException e) { |
| return null; |
| } |
| |
| OXslSheet sheet = _expr.getXslSheet(uri); |
| if( sheet != null) { |
| String result = sheet.getSheetBody(); |
| if (result != null) { |
| return new StreamSource(new StringReader(result)); |
| } else { |
| return null; |
| } |
| } |
| |
| InputStream result = getResourceAsStream(uri); |
| if( result != null ) { |
| return new StreamSource(result); |
| } else { |
| return null; |
| } |
| } |
| |
| /** |
| * Given a URI this function will attempt to retrieve the resource declared at that URI location |
| * as a stream. This URI can be defined as being relative to the executing process instance's |
| * physical file location or can point to an HTTP(S) resource. |
| * |
| * @param docUri - the URI to resolve |
| * @return stream - the resource contents, or null if none found. |
| */ |
| private InputStream getResourceAsStream(URI docUri) { |
| URI resolvedURI = _baseResourceURI.resolve(docUri); |
| InputStream is = null; |
| |
| try { |
| // treat URI as URL and try to load it. |
| URL url = resolvedURI.toURL(); |
| is = url.openStream(); |
| |
| // and read it to a buffer. |
| return is; |
| } catch (Exception e) { |
| __log.warn("Couldn't load XSL resource " + docUri, e); |
| } |
| return null; |
| } |
| |
| } |