| /* |
| * 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.xpath10.runtime; |
| |
| import org.apache.ode.bpel.elang.xpath10.o.OXPath10Expression; |
| import org.apache.ode.bpel.o.OXslSheet; |
| import org.apache.ode.utils.StreamUtils; |
| import org.apache.ode.utils.fs.FileUtils; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import javax.xml.transform.URIResolver; |
| import javax.xml.transform.Source; |
| import javax.xml.transform.TransformerException; |
| import javax.xml.transform.stream.StreamSource; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.StringReader; |
| |
| /** |
| * 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 Log __log = LogFactory.getLog(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 { |
| String result; |
| URI uri; |
| try { |
| uri = new URI(FileUtils.encodePath(href)); |
| } catch (URISyntaxException e) { |
| return null; |
| } |
| |
| OXslSheet sheet = _expr.getXslSheet(uri); |
| if( sheet != null) { |
| result = sheet.sheetBody; |
| } else { |
| result = getResourceAsString(uri); |
| } |
| |
| if( result != null ) { |
| return new StreamSource(new StringReader(result)); |
| } else { |
| return null; |
| } |
| } |
| |
| /** |
| * Given a URI this function will attempt to retrieve the resource declared at that URI location |
| * as a string. (Hopefully everything's character encodings are all ok...) This URI can be |
| * defined as being relative to the executing process instance's physical file location. |
| * |
| * @param docUri - the URI to resolve |
| * @return String - the resource contents, or null if none found. |
| */ |
| private String getResourceAsString(URI docUri) { |
| URI resolvedURI= _baseResourceURI.resolve(docUri); |
| InputStream is = null; |
| try { |
| File f = new File(resolvedURI); |
| if (!f.exists()) return null; |
| is = new FileInputStream(f); |
| return new String(StreamUtils.read(is)); |
| } catch (IOException e) { |
| __log.info("Couldn't load XSL resource " + docUri); |
| } finally { |
| try { |
| if (is != null) is.close(); |
| } catch (Exception ex) { |
| // No worries. |
| } |
| } |
| return null; |
| } |
| |
| } |