| /** |
| * 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.camel.builder.xml; |
| |
| import java.io.File; |
| import java.io.InputStream; |
| import javax.xml.transform.Source; |
| import javax.xml.transform.TransformerException; |
| import javax.xml.transform.URIResolver; |
| import javax.xml.transform.stream.StreamSource; |
| |
| import org.apache.camel.spi.ClassResolver; |
| import org.apache.camel.util.FileUtil; |
| import org.apache.camel.util.ObjectHelper; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Camel specific {@link javax.xml.transform.URIResolver} which is capable of loading files |
| * from the classpath and file system. |
| * <p/> |
| * Use prefix <tt>classpath:</tt> or <tt>file:</tt> to denote either classpath or file system. |
| * If no prefix is provided then the prefix from the <tt>location</tt> parameter is used. |
| * If it neither has a prefix then <tt>classpath:</tt> is used. |
| * <p/> |
| * This implementation <b>cannot</b> load files over http. |
| * |
| * @version |
| */ |
| public class XsltUriResolver implements URIResolver { |
| |
| private static final transient Logger LOG = LoggerFactory.getLogger(XsltUriResolver.class); |
| |
| private final ClassResolver resolver; |
| private final String location; |
| |
| public XsltUriResolver(ClassResolver resolver, String location) { |
| this.resolver = resolver; |
| this.location = location; |
| } |
| |
| public Source resolve(String href, String base) throws TransformerException { |
| if (ObjectHelper.isEmpty(href)) { |
| throw new TransformerException("include href is empty"); |
| } |
| |
| LOG.trace("Resolving URI with href: {} and base: {}", href, base); |
| |
| if (href.startsWith("classpath:")) { |
| LOG.debug("Resolving URI from classpath: {}", href); |
| |
| String name = ObjectHelper.after(href, ":"); |
| InputStream is = resolver.loadResourceAsStream(name); |
| if (is == null) { |
| throw new TransformerException("Cannot find " + name + " in classpath"); |
| } |
| return new StreamSource(is); |
| } |
| |
| if (href.startsWith("file:")) { |
| LOG.debug("Resolving URI from file: {}", href); |
| |
| String name = ObjectHelper.after(href, ":"); |
| File file = new File(name); |
| return new StreamSource(file); |
| } |
| |
| // okay then its relative to the starting location from the XSLT component |
| String path = FileUtil.onlyPath(location); |
| if (ObjectHelper.isEmpty(path)) { |
| // default to use classpath: location |
| path = "classpath:" + href; |
| return resolve(path, base); |
| } else { |
| // default to use classpath: location |
| path = "classpath:" + path + File.separator + href; |
| return resolve(path, base); |
| } |
| } |
| |
| } |